Is CLPC a digital currency
Publish: 2021-05-11 10:21:37
1. There used to be buses across from Xintang square, but last year all the stations in Xintang moved to the new station, so now you have to go up along Jiefang North Road in Xintang square and take the bus to Guangzhou at the bus stop in front of Jufu Hotel opposite to the traffic lights. It's said to go to the main gate of Phoenix City, After getting off the car, go to the front of the Phoenix Statue at the gate of Phoenix City and turn right. It's not long before you arrive.
2.
bus line: No.372 → Metro Line 13 → Metro Line 5, the whole journey is about 41.3km
1. Walk about 490m from Phoenix transportation center to Phoenix Avenue (Lamu Square) station
2. Take No.372, pass 5 stops, reach Nangang station
3. Walk about 170m, reach Nangang station
4. Take Metro Line 13, pass 5 stops, reach Yuzhu station
5 Take Metro Line 5, pass 15 stations and arrive at Guangzhou railway station
3. Roadheader
roadheader is a kind of machine used for digging straight underground roadway. Roadheader is divided into open roadheader and shield roadheader. It is mainly composed of walking mechanism, working mechanism, loading mechanism and transfer mechanism. As the walking mechanism moves forward, the cutting head in the working mechanism continuously breaks the rock and transports the broken rock away. It has the advantages of safety, high efficiency and good quality, but the cost is large, the structure is complex, and the loss is also large<
basic information
Chinese name
roadheader
purpose
construction, the machine of digging straight underground roadway
roadheader is divided into
Open roadheader and shield roadheader
main mechanism
walking mechanism, working mechanism, loading mechanism and transfer mechanism
advantages
safe, reliable and reliable But the cost is large, the structure is complex, the loss is also large
market prospects
at present, China has become the world's largest roadheader manufacturing base and application market. With the rapid growth of domestic urban road traffic, railway, highway, water conservancy, municipal engineering and other construction undertakings, China's tunneling machinery also ushered in the rapid development. China's tunneling machinery instry has become a domestic high-end equipment manufacturing instry and strategic emerging instry< The market prospect of roadheader in China is considerable, and its market demand is huge. We analyze from two aspects of coal mine roadheader and tunnel roadheader respectively:
first, the market prospect of coal mine roadheader
China is a big coal procing country, with many large and small coal mines. With the rising price of oil and gas and other energy, coal has become a popular energy in China. The future demand is bound to be huge, which will stimulate the rapid development of coal mining instry. With the government's attention to the safety of coal mining, it is possible to graally realize fully mechanized proction in the future, which will inevitably further increase the demand for coal mine roadheader
although the supply and demand of coal mine roadheader in the 21st century has been close to balance, if the price of oil and natural gas remains high, the market supply and demand of domestic coal mine roadheader will continue to maintain the current level. With the replacement of new and old equipment, the market scale of domestic coal mine roadheader will be considerable
it is estimated that the domestic market of coal mine roadheader still has a certain development potential, so the market of coal mine roadheader still has a certain development space, but the specific extent of the space depends on the changes of international and domestic energy patterns in the next few years
but generally speaking, the domestic coal mine roadheader market will maintain a slow growth in the next few years. However, e to the strong competitive advantage of China's coal mine roadheader in the international market, mainly the low price, it has strong competitiveness in some developing coal procing countries such as neighboring countries and Africa, and can open up a certain market space, For domestic coal mine roadheader proction enterprises, this will be a more critical development opportunity and prospect< Second, the market prospect of TBM
China's light TBM market is graally shrinking, the future development space is not very big, but the TBM has a very good development prospect
first of all, China's urban construction needs a large number of shield machines, especially in Shanghai, Beijing, Guangdong and other places, which need to build a large number of tunnel traffic projects. In addition, railway construction also needs a lot of shield machines. Therefore, the domestic demand for shield machines will remain strong in the next few years
if the self-sufficiency rate of domestic procts can be increased to 40%, the annual market scale will exceed 1 billion yuan, which is quite considerable
moreover, the domestic shield technology is graally improving, and the gap with the developed countries is graally narrowing. On the premise of similar performance, the low price is bound to have a considerable competitive advantage in the market< The shield union driving machine for coal mine entry (sudm) invented by Professor Hui Xingtian of Xi'an University of science and technology can realize simultaneous excavation and support. The construction speed is twice that of the existing roadheader
research level
in recent years, with the rapid development of China's coal instry, the coal machinery instry, which is closely related to it, has been paid more and more attention. In the coal instry programmatic document "several opinions on promoting the healthy development of the coal instry", in the national coal instry science and Technology Conference and the coal instry structure adjustment policy issued by the national development and Reform Commission, the development of large-scale underground comprehensive coal mining equipment is involved
tunneling and stoping are important proction links in coal mine proction. The national policy is to pay equal attention to mining and excavation, and tunneling first. The rapid excavation of coal mine roadway is the key technical measure to ensure the high and stable proction of coal mine. The level of mining technology and equipment is directly related to the capacity and safety of coal mine proction. High efficient mechanized tunneling and supporting technology is the necessary condition to ensure the high yield and efficiency of the mine, and it is also the development direction of roadway tunneling technology. With the development of fully mechanized mining technology, there has been a super working face with an annual output of several million tons or even ten million tons in China, which greatly increases the number of mining roadways consumed annually, and makes roadway excavation become the common and key technology of efficient and intensive proction in coal mines
in China, the most important way of efficient coal roadway driving is the supporting operation line of cantilever roadheader and single roof bolter, also known as comprehensive mechanized coal roadway driving, which has been widely used in China's state-owned key coal mines, and the main driving machine is cantilever roadheader
the boom type roadheader integrates the functions of cutting, transporting, walking and operation, and is mainly used to cut underground rock, coal or semi coal rock roadway with any shape section. At present, although the design of roadheader in China is still far away from the international advanced technology, the domestic technical level can basically meet the domestic demand. Large and medium-sized roadheader is constantly innovated< However, the drilling and blasting method is still the main method in rock roadway construction in China, and the heavy cantilever roadheader used in large section rock roadway is in the experimental stage in China, but the domestic coal proction is graally developing towards high yield, high efficiency and safety, and the coal mine technical equipment is developing towards heavy, large-scale, powerful, high-power and mechatronics, It has successively introced the heavy cantilever roadheader of Germany wav300, Austria ahm105 and UK MK3. All rock roadway heavy cantilever roadheader represents the future development direction of rock roadway driving technology
the gap between domestic heavy roadheader and foreign advanced equipment is not only low in overall performance parameters, but also weak in basic research. The load spectrum of cutting, shipping and walking parts suitable for China's coal mine geological conditions has not been established, there is no complete theoretical basis for design, and the dynamic simulation of computer is still blank; There is a big gap in the reliability of components, control technology, cutting mode, st removal system and other core technologies
safe operation
1. Drivers should have junior high school ecation or above, love their own work, have a strong sense of responsibility, and pass the special training and examination before they can go on ty with certificates
2. The driver must be familiar with the structure, performance and operation principle of the machine, be able to operate the machine accurately and skillfully, and understand the general maintenance and troubleshooting knowledge of the equipment
3. The driver must insist on using all the safety locking and protection devices on the roadheader, and shall not change or discard them without authorization, and shall not adjust the pressure of hydraulic system and atomization system at will
4. The operating handles, buttons and indicating instruments of various electrical equipment control switches should be properly protected to prevent damage or loss
5. In addition to skilled operation of the machine, daily inspection and maintenance of the machine should also be carried out. When the roadheader is found to have a fault, it should actively cooperate with the maintenance personnel to deal with it. If it cannot be dealt with, it should immediately report to the district team or the dispatching room
6. There must be two drivers, the first driver is responsible for operation and the second driver is responsible for monitoring. Must concentrate, must not leave the post without authorization, must not entrust personnel without a license to operate
7. When the roadheader stops working, overhauling and shifting, it is necessary to turn off the isolating switch on the machine and hang the power failure sign
8. For the operation of the machine and the existing problems, the handover driver must explain clearly to the successor driver
9. When the gas concentration in the air flow within 20 meters before and after the roadheader reaches 1.5%, it must stop running, cut off the power supply and deal with it. When the gas concentration must be reced to less than 1%, the power can be turned on
10. After taking over the shift, the driver should carefully check the working face and the surrounding conditions of the roadheader to ensure that the working area is safe, clean and free of obstacles
11. Before starting the machine, the driver must check the machine as follows:
(1) each handle and button should be complete, flexible and reliable, and each handle should be set to zero
(2) the mechanical, electrical, hydraulic systems and safety protection devices should be normal and reliable, the parts should be complete, and the connecting screws should be complete and tight
(3) the cable clamps of the connecting devices of the electrical system should be complete and firm, and the cables should be hung neatly without damage or extrusion
(4) the joints of hydraulic pipeline and atomization system pipeline shall be free of damage and leakage, and the protective devices shall be complete and reliable. The extended cables and water pipes shall be prepared along the working face and suspended neatly. The length of cables and water pipes dragged behind the roadheader shall not exceed 10m
(5) the oil level and oil quantity of recer and hydraulic oil tank should be appropriate without leakage, and the machine should be filled with oil and lubricated according to the technical requirements
(6) the transfer belt conveyor should be in good condition with complete supporting rollers
(7) the pick and tooth seat of the cutting head should be in good condition. In case of tooth loss or serious wear, the power supply of the roadheader should be cut off and replaced in time
(8) the loading claw and sprocket should be in good condition. The sag of scraper chain shall be appropriate, and there shall be no broken chain and missing pin. The scraper shall be complete and undamaged. The locking nut shall be tightened to prevent the scraper from loosening
(9) the track, track shoes, pin shaft and sprocket shall be kept in good condition, and the tightness of the track shall be adjusted according to the regulations
(10) spray system, cooling device and lighting should be in good condition.
12. After checking and confirming that the machine is normal and the operators withdraw to a safe place, the power can be transmitted, and the no-load test run shall be concted according to the operation procere. It is forbidden to start the machine with load
13. Send out alarm signal before starting the machine and start it according to the sequence specified by the technical operation of the machine
14. According to different properties of coal and rock, determine the best cutting method. The specific methods refer to the following ways:
(1) when driving semi coal rock, the coal should be cut first and then the rock, that is, the soft first and then the hard procere
(2) generally, the cutting should start from the lower part of the working face, first cutting the bottom and then cutting
(3) the bedding of coal and rock must be considered in cutting, and the cutting head should move along the bedding direction of coal instead of cross bedding
(4) when cutting the whole coal, brush the sides on all sides first, and then crush the middle part
(5) for hard coal, the top-down cutting procere is adopted
(6) for the broken roof, the method of retaining top coal or cutting around the section should be adopted
15. The following points should be noted when cutting coal and rock:
(1) when the rock hardness is greater than the cutting capacity of the roadheader, the roadheader should be stopped and other rock breaking measures should be taken
(2) according to the soft and hard degree of coal and rock, grasp the machine's propulsion speed to avoid the phenomenon of cutting motor overload or crushing the scraper conveyor
roadheader is a kind of machine used for digging straight underground roadway. Roadheader is divided into open roadheader and shield roadheader. It is mainly composed of walking mechanism, working mechanism, loading mechanism and transfer mechanism. As the walking mechanism moves forward, the cutting head in the working mechanism continuously breaks the rock and transports the broken rock away. It has the advantages of safety, high efficiency and good quality, but the cost is large, the structure is complex, and the loss is also large<
basic information
Chinese name
roadheader
purpose
construction, the machine of digging straight underground roadway
roadheader is divided into
Open roadheader and shield roadheader
main mechanism
walking mechanism, working mechanism, loading mechanism and transfer mechanism
advantages
safe, reliable and reliable But the cost is large, the structure is complex, the loss is also large
market prospects
at present, China has become the world's largest roadheader manufacturing base and application market. With the rapid growth of domestic urban road traffic, railway, highway, water conservancy, municipal engineering and other construction undertakings, China's tunneling machinery also ushered in the rapid development. China's tunneling machinery instry has become a domestic high-end equipment manufacturing instry and strategic emerging instry< The market prospect of roadheader in China is considerable, and its market demand is huge. We analyze from two aspects of coal mine roadheader and tunnel roadheader respectively:
first, the market prospect of coal mine roadheader
China is a big coal procing country, with many large and small coal mines. With the rising price of oil and gas and other energy, coal has become a popular energy in China. The future demand is bound to be huge, which will stimulate the rapid development of coal mining instry. With the government's attention to the safety of coal mining, it is possible to graally realize fully mechanized proction in the future, which will inevitably further increase the demand for coal mine roadheader
although the supply and demand of coal mine roadheader in the 21st century has been close to balance, if the price of oil and natural gas remains high, the market supply and demand of domestic coal mine roadheader will continue to maintain the current level. With the replacement of new and old equipment, the market scale of domestic coal mine roadheader will be considerable
it is estimated that the domestic market of coal mine roadheader still has a certain development potential, so the market of coal mine roadheader still has a certain development space, but the specific extent of the space depends on the changes of international and domestic energy patterns in the next few years
but generally speaking, the domestic coal mine roadheader market will maintain a slow growth in the next few years. However, e to the strong competitive advantage of China's coal mine roadheader in the international market, mainly the low price, it has strong competitiveness in some developing coal procing countries such as neighboring countries and Africa, and can open up a certain market space, For domestic coal mine roadheader proction enterprises, this will be a more critical development opportunity and prospect< Second, the market prospect of TBM
China's light TBM market is graally shrinking, the future development space is not very big, but the TBM has a very good development prospect
first of all, China's urban construction needs a large number of shield machines, especially in Shanghai, Beijing, Guangdong and other places, which need to build a large number of tunnel traffic projects. In addition, railway construction also needs a lot of shield machines. Therefore, the domestic demand for shield machines will remain strong in the next few years
if the self-sufficiency rate of domestic procts can be increased to 40%, the annual market scale will exceed 1 billion yuan, which is quite considerable
moreover, the domestic shield technology is graally improving, and the gap with the developed countries is graally narrowing. On the premise of similar performance, the low price is bound to have a considerable competitive advantage in the market< The shield union driving machine for coal mine entry (sudm) invented by Professor Hui Xingtian of Xi'an University of science and technology can realize simultaneous excavation and support. The construction speed is twice that of the existing roadheader
research level
in recent years, with the rapid development of China's coal instry, the coal machinery instry, which is closely related to it, has been paid more and more attention. In the coal instry programmatic document "several opinions on promoting the healthy development of the coal instry", in the national coal instry science and Technology Conference and the coal instry structure adjustment policy issued by the national development and Reform Commission, the development of large-scale underground comprehensive coal mining equipment is involved
tunneling and stoping are important proction links in coal mine proction. The national policy is to pay equal attention to mining and excavation, and tunneling first. The rapid excavation of coal mine roadway is the key technical measure to ensure the high and stable proction of coal mine. The level of mining technology and equipment is directly related to the capacity and safety of coal mine proction. High efficient mechanized tunneling and supporting technology is the necessary condition to ensure the high yield and efficiency of the mine, and it is also the development direction of roadway tunneling technology. With the development of fully mechanized mining technology, there has been a super working face with an annual output of several million tons or even ten million tons in China, which greatly increases the number of mining roadways consumed annually, and makes roadway excavation become the common and key technology of efficient and intensive proction in coal mines
in China, the most important way of efficient coal roadway driving is the supporting operation line of cantilever roadheader and single roof bolter, also known as comprehensive mechanized coal roadway driving, which has been widely used in China's state-owned key coal mines, and the main driving machine is cantilever roadheader
the boom type roadheader integrates the functions of cutting, transporting, walking and operation, and is mainly used to cut underground rock, coal or semi coal rock roadway with any shape section. At present, although the design of roadheader in China is still far away from the international advanced technology, the domestic technical level can basically meet the domestic demand. Large and medium-sized roadheader is constantly innovated< However, the drilling and blasting method is still the main method in rock roadway construction in China, and the heavy cantilever roadheader used in large section rock roadway is in the experimental stage in China, but the domestic coal proction is graally developing towards high yield, high efficiency and safety, and the coal mine technical equipment is developing towards heavy, large-scale, powerful, high-power and mechatronics, It has successively introced the heavy cantilever roadheader of Germany wav300, Austria ahm105 and UK MK3. All rock roadway heavy cantilever roadheader represents the future development direction of rock roadway driving technology
the gap between domestic heavy roadheader and foreign advanced equipment is not only low in overall performance parameters, but also weak in basic research. The load spectrum of cutting, shipping and walking parts suitable for China's coal mine geological conditions has not been established, there is no complete theoretical basis for design, and the dynamic simulation of computer is still blank; There is a big gap in the reliability of components, control technology, cutting mode, st removal system and other core technologies
safe operation
1. Drivers should have junior high school ecation or above, love their own work, have a strong sense of responsibility, and pass the special training and examination before they can go on ty with certificates
2. The driver must be familiar with the structure, performance and operation principle of the machine, be able to operate the machine accurately and skillfully, and understand the general maintenance and troubleshooting knowledge of the equipment
3. The driver must insist on using all the safety locking and protection devices on the roadheader, and shall not change or discard them without authorization, and shall not adjust the pressure of hydraulic system and atomization system at will
4. The operating handles, buttons and indicating instruments of various electrical equipment control switches should be properly protected to prevent damage or loss
5. In addition to skilled operation of the machine, daily inspection and maintenance of the machine should also be carried out. When the roadheader is found to have a fault, it should actively cooperate with the maintenance personnel to deal with it. If it cannot be dealt with, it should immediately report to the district team or the dispatching room
6. There must be two drivers, the first driver is responsible for operation and the second driver is responsible for monitoring. Must concentrate, must not leave the post without authorization, must not entrust personnel without a license to operate
7. When the roadheader stops working, overhauling and shifting, it is necessary to turn off the isolating switch on the machine and hang the power failure sign
8. For the operation of the machine and the existing problems, the handover driver must explain clearly to the successor driver
9. When the gas concentration in the air flow within 20 meters before and after the roadheader reaches 1.5%, it must stop running, cut off the power supply and deal with it. When the gas concentration must be reced to less than 1%, the power can be turned on
10. After taking over the shift, the driver should carefully check the working face and the surrounding conditions of the roadheader to ensure that the working area is safe, clean and free of obstacles
11. Before starting the machine, the driver must check the machine as follows:
(1) each handle and button should be complete, flexible and reliable, and each handle should be set to zero
(2) the mechanical, electrical, hydraulic systems and safety protection devices should be normal and reliable, the parts should be complete, and the connecting screws should be complete and tight
(3) the cable clamps of the connecting devices of the electrical system should be complete and firm, and the cables should be hung neatly without damage or extrusion
(4) the joints of hydraulic pipeline and atomization system pipeline shall be free of damage and leakage, and the protective devices shall be complete and reliable. The extended cables and water pipes shall be prepared along the working face and suspended neatly. The length of cables and water pipes dragged behind the roadheader shall not exceed 10m
(5) the oil level and oil quantity of recer and hydraulic oil tank should be appropriate without leakage, and the machine should be filled with oil and lubricated according to the technical requirements
(6) the transfer belt conveyor should be in good condition with complete supporting rollers
(7) the pick and tooth seat of the cutting head should be in good condition. In case of tooth loss or serious wear, the power supply of the roadheader should be cut off and replaced in time
(8) the loading claw and sprocket should be in good condition. The sag of scraper chain shall be appropriate, and there shall be no broken chain and missing pin. The scraper shall be complete and undamaged. The locking nut shall be tightened to prevent the scraper from loosening
(9) the track, track shoes, pin shaft and sprocket shall be kept in good condition, and the tightness of the track shall be adjusted according to the regulations
(10) spray system, cooling device and lighting should be in good condition.
12. After checking and confirming that the machine is normal and the operators withdraw to a safe place, the power can be transmitted, and the no-load test run shall be concted according to the operation procere. It is forbidden to start the machine with load
13. Send out alarm signal before starting the machine and start it according to the sequence specified by the technical operation of the machine
14. According to different properties of coal and rock, determine the best cutting method. The specific methods refer to the following ways:
(1) when driving semi coal rock, the coal should be cut first and then the rock, that is, the soft first and then the hard procere
(2) generally, the cutting should start from the lower part of the working face, first cutting the bottom and then cutting
(3) the bedding of coal and rock must be considered in cutting, and the cutting head should move along the bedding direction of coal instead of cross bedding
(4) when cutting the whole coal, brush the sides on all sides first, and then crush the middle part
(5) for hard coal, the top-down cutting procere is adopted
(6) for the broken roof, the method of retaining top coal or cutting around the section should be adopted
15. The following points should be noted when cutting coal and rock:
(1) when the rock hardness is greater than the cutting capacity of the roadheader, the roadheader should be stopped and other rock breaking measures should be taken
(2) according to the soft and hard degree of coal and rock, grasp the machine's propulsion speed to avoid the phenomenon of cutting motor overload or crushing the scraper conveyor
4.
Four traffic lights of 15.1km in 27 minutes
take a taxi for about 43 yuan. Route: Guangzhou Ring Expressway and Guangyuan Expressway
Guangzhou Institute of navigation
enter Dashadi East Road, drive 590m
turn right, enter huakeng Road, drive 20m
turn right, enter Xinhua Road, drive 730m
turn left, enter Guangshen riverside expressway, Drive 1.0KM
keep right ahead, enter guantian interchange, drive 290m
keep left ahead, enter Guangzhou Ring Expressway, drive 2.9km
keep right ahead, enter Bicun interchange, drive 1.1km
keep left ahead, enter Guangyuan expressway, drive 7.5km
keep right ahead, From Guangyuan Expressway to square street, drive 570m
to enter roundabout, enter Square Street, drive 280m
Phoenix traffic center
5. Bus routes: Hua bus terminus Xintang xing passenger station → Metro Line 4 → Metro Line 8 → Metro Line 2, the whole journey is about 50.5km
1. Walk about 1.4km from Phoenix to Country Garden Phoenix Station
2. Take Hua bus terminus Xintang xing passenger station, pass through 2 stations to chebei viact side station (you can also take guangzeng line 3)
3 Walk about 610 meters to Huangcun station
4. Take Metro Line 4, pass 3, and reach Wanshengwei station
5. Take Metro Line 8, pass 9, and reach Changgang station
6. Take Metro Line 2, pass 8, and reach Guangzhou South Station
7. Walk about 350 meters to Guangzhou south station
1. Walk about 1.4km from Phoenix to Country Garden Phoenix Station
2. Take Hua bus terminus Xintang xing passenger station, pass through 2 stations to chebei viact side station (you can also take guangzeng line 3)
3 Walk about 610 meters to Huangcun station
4. Take Metro Line 4, pass 3, and reach Wanshengwei station
5. Take Metro Line 8, pass 9, and reach Changgang station
6. Take Metro Line 2, pass 8, and reach Guangzhou South Station
7. Walk about 350 meters to Guangzhou south station
6. Bus route: No.298 → guangzeng No.3 → Zengcheng No.26, the whole journey is about 41.9km
1. Walk about 200m from Yuanjing road to Baiyun District Government Center Station
2. Take No.298, pass 9 stops, and reach Lianquan intersection station
3. Walk about 200m, and reach Lianquan intersection station
4. Take guangzeng No.3, pass 6 stops, and reach Phoenix Station
5. Walk about 200m, Arrive at fengxinyuan station
6. Take Zengcheng No.26 bus, pass 3 stops, and arrive at Fenghuang transportation center station
1. Walk about 200m from Yuanjing road to Baiyun District Government Center Station
2. Take No.298, pass 9 stops, and reach Lianquan intersection station
3. Walk about 200m, and reach Lianquan intersection station
4. Take guangzeng No.3, pass 6 stops, and reach Phoenix Station
5. Walk about 200m, Arrive at fengxinyuan station
6. Take Zengcheng No.26 bus, pass 3 stops, and arrive at Fenghuang transportation center station
7. Er... Both of you upstairs are wrong! It's related to the level of characters, but it's not that you can't dig without reaching the level, but there are limited kinds of minerals, medicinal materials and wood that can be g
for example, if you go online for level 1, you can buy a hoe to go out mining (the hoe can be used for life), but you can only dig up iron ore, withered tree roots, coarse coal mines, gravel mines, Agastache rugosa, nectar, tongjingcao and tianxianzi. The first four are minerals and the last four are herbs
when you reach level 12, you can dig iron ore, thick tree roots and other mineral materials and medicinal materials. Level 20 is a higher level... Level 30, level 40 and level 80 can dig most of the mineral materials in the perfect continent
PS: it has nothing to do with the proction level. The proction level can only determine whether the ore material you dig can be made into finished equipment and medicine of the same level.
for example, if you go online for level 1, you can buy a hoe to go out mining (the hoe can be used for life), but you can only dig up iron ore, withered tree roots, coarse coal mines, gravel mines, Agastache rugosa, nectar, tongjingcao and tianxianzi. The first four are minerals and the last four are herbs
when you reach level 12, you can dig iron ore, thick tree roots and other mineral materials and medicinal materials. Level 20 is a higher level... Level 30, level 40 and level 80 can dig most of the mineral materials in the perfect continent
PS: it has nothing to do with the proction level. The proction level can only determine whether the ore material you dig can be made into finished equipment and medicine of the same level.
8. Mining needs a shovel. 2000 yuan. The peddler bought it
bottom materials such as iron sand mine can be excavated above level 1
primary mines, such as black iron ore, are excavated above level 20; Intermediate ore, such as manganese iron ore, is above grade 40; High grade ore, such as Xuan iron ore, is above level 60; High grade minerals, such as meteorite iron ore, can only be found in the demon world after level 90.
bottom materials such as iron sand mine can be excavated above level 1
primary mines, such as black iron ore, are excavated above level 20; Intermediate ore, such as manganese iron ore, is above grade 40; High grade ore, such as Xuan iron ore, is above level 60; High grade minerals, such as meteorite iron ore, can only be found in the demon world after level 90.
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