Mining is OK
Development:
1. Bitcoin (bitcoin) is a kind of network virtual currency, which can buy real-life goods. It is characterized by decentralization, anonymity, and can only be used in the digital world. It does not belong to any country or financial institution, and is not subject to geographical restrictions. It can be exchanged anywhere in the world. Therefore, it is used as a money laundering tool by some criminals. In 2013, the U.S. government recognized the legal status of bitcoin, making the price of bitcoin soar. In China, on November 19, 2013, a bitcoin was equivalent to 6989 yuan
2. On January 7, 2014, Taobao announced that it would ban the sale of Internet virtual currencies such as bitcoin and lightcoin from January 14. West Virginia Democratic Senator Joe; On February 26, 2014, Joe Manchin issued an open letter to a number of regulatory authorities of the US federal government, hoping that relevant institutions would pay attention to the current situation of bitcoin encouraging illegal activities and disrupting the financial order, and demanded that actions be taken as soon as possible to completely ban the electronic currency. On January 11, 2017), the Shanghai headquarters of the people's Bank of China and the Shanghai Municipal Finance Office carried out on-site inspection of bitcoin China.
At present, bitcoin needs to be g by professional mining machines. The global unified computing difficulty of bitcoin is 2621404453 (expected to change in two days). It takes more than 2000 years for a 2.5GHz CPU to work out a bitcoin
according to the current speed and the number of bitcoins, it will take three months to get a bitcoin if a computer is kept in a 24-hour state of operation
extended data:
because the current bitcoin mines use special bitcoin mining machines to mine. The computing power of an ant S9 miner is 13.5th/s, which is equivalent to the sum of the computing power of 7500 1080ti graphics cards. A medium-sized mine has hundreds of such miners
the instry of bitcoin is not very good either, so you'd better not dream of becoming rich overnight with bitcoin. Now many countries have issued policies to suppress the rise of bitcoin prices. Some countries even refuse to dig bitcoin. Many bankers and economists are disgusted with the emergence of bitcoin
literally, bitcoin comes first, then blockchain. Bitcoin started in 2009 and blockchain started in early 2014
in essence, blockchain technology is a collection of technologies, mainly composed of distributed account book data
bitcoin is an application. In order to achieve some of the purposes of bitcoin, some technologies are used, because bitcoin is more and more valued by the market (that is, the price is getting higher and higher). These underlying technologies are later refined and called blockchain separately
then, their relationship is similar to that between internal combustion engine and automobile
in order to run, cars use internal combustion engine technology
the internal combustion engine technology is also widely used in trains, small power stations, agricultural machinery, engineering machinery, merchant ships, conventional submarines and small airplanes because of the wide application of automobiles. The number of internal combustion engines in the world ranks first among the power machinery of human beings
if you understand the relationship between blockchain and bitcoin in this way, is blockchain technology important
it's important, but more important is the structure of all kinds of human data and the decentralized future realized by this technology.
1 Division of mining units of ore deposits generally, ore deposits occupy a large area and have abundant reserves. In order to develop in a planned way, the ore deposits are often divided into several parts (mining units) from large to small according to the occurrence conditions of ore bodies, and are classified into corresponding mining enterprises (proction units) for mining
generally, the distribution range of ore deposits is called mining area, which is usually classified as a Mining Bureau (or company). All deposits in the same geological structure and of the same origin are called ore fields (coal mines are called coalfields). If the mine field is large in scale, it can be divided into several parts, each part is mined by a mine (pit mouth), which is called mine field (Figure 12-1). The boundary of mine field can be artificial boundary or natural boundary. During mining, the mine field must be divided into smaller parts. For inclined seam, the seam is usually divided into several long sections parallel to the strike according to a certain elevation along its inclined direction, which is called stage (or middle section), and the upper and lower interface is called horizontal, such as 0m level and - 50m level (Fig. 12-2). When the stage is small, the mining can be carried out at one time along the whole stage; If the stage area is large, it should be further divided into n mining areas, each mining area along the inclined layout of n mining faces, called section
Fig. 12-8 schematic diagram of roof failure zoning
(according to Beijing Academy of Coal Sciences, 1985)
a-irregular caving; B - rule falling; C-serious fracture; D-general cracking; E - tiny crack; F - caving zone; G-fracture zone; H-overall moving zone; I-fracture zone
1) caving zone: the area where the direct roof splits into pieces and collapses downward. It can be divided into irregular caving section and regular caving section. The rocks in this area are broken and expanded, accumulated and permeable, which can form a channel for the upper groundwater or surface water to pour downward, causing water inrush. Generally, this area is not allowed to develop into the upper strong aquifer or surface water
2) fracture zone: a large number of mining fractures with cut and separated layers appear above the caving zone. The zone can be divided into three sections: serious fracture section, general fracture section and micro fracture section. When the zone reaches the supply water source, the mine water inflow will increase sharply, even cause water inrush
3) overall movement zone of rock stratum: the zone is located above the fracture zone, which is generally characterized by the overall bending deformation or shear displacement of the stratum, or the overall bending and falling in the zone. Generally, there is no fracture and it does not form a water filling channel
2 the salary is high, and I have worked to the section level. Except for welfare and hardware, I got more than 80000, but one day in the valley, most of the coal mines were in the mountains, which was boring. Generally speaking, it's the most difficult period to start with a technician. It's not as good as a worker. As long as you need to write something about ty, technology, business and so on, even if it's the work of a technician in Party building, and you have to go down the well to follow the shift at the same time. More than 25 people go down the well a month. Just like ordinary workers, many of them can't stand it. They all run in this period. Generally, more than 5000 people will go down the well a month! But it's a crime you didn't expect when you were in school. It's not only hard work, but also rough management in the coal mine. After all, most of the coal mines are co workers, which can't be managed by ordinary literati. Those who graated from school may not be able to eat in the coal mine. After all, it's not high-tech. Leaders, like bandit leaders, treat their subordinates rudely and scold them casually! Don't think about it if you want dignity. It's the same when I became a section level. Every morning I held an early morning adjustment meeting. It was just a meeting for mine leaders to scold slaves. I couldn't bear to leave
3 with family members, who do you take. Coal mines are all in the ravine, who would like to come with you, who would like to leave their youth there. It's hard work, overtime every day, high safety pressure and harsh environment. I have been on ty for a long time since I became a technician. I'm on ty for my own shift and for the leaders above. I don't even think about it ring holidays. It's like wearing dirty work clothes every day, staying in the underground without the sun, and going home 2 or 3 times a week (my home is in a small town 30 kilometers away from the coal mine), Some of my classmates are in a more remote mine and only go back once a month! What's the picture! I often ask myself why I didn't learn a craft at the beginning, even a hairdresser or a chef! Now we can only deal with black coal, coal miners and migrant workers every day! But besides, I'm lucky. I've got a good daughter-in-law! It's much better than those who are single now and don't want to find a colleague from their hometown! Some of the people who are looking for their daughter-in-law in rural areas are arranged to go to the miner's lamp room, bathhouse and canteen (leaders can directly go to the authorities). It doesn't matter about the work of dry cleaning coal factory. The coal st is big and dirty, which is not what you can think of. Whose daughter-in-law is willing to do the work
4 you don't have to go to the mine. If you study mining, you can't go there. The employment area is too narrow. If you study mechanical and electrical engineering and geological surveying, you can change your profession. Where are you going. Design Institute? The problem is that they don't want so many people! You can't get along well in the coal mine. Do you want to go to the design institute! If I could, I would have gone already! Who's going down the well
5 when the mine manager, dream! There are several mine managers and deputy mine managers in a mine! In a word, the curtain behind the coal mine network is darker than coal! It doesn't matter if you can do it any more, then you're only tired to death! If you work hard, you won't even be advanced
6 it's impossible to be a billionaire. If you want to be a billionaire, the children of senior officials all over China have come to mining. Your father is the mayor. If not the county magistrate, it's possible. But if you have such a father, you will never be allowed to work in a coal mine
7 higher ecation is popular in coal mines. Not necessarily, some of my colleagues have graate students from the year before last, but they don't have any business! It doesn't matter. The immediate supervisor gives him endless work now, and he doesn't say it's good, so he is deliberately punished. In private, this guy won't come. Qinggao, there's no high technology in the coal mine. It's more than enough to have a college student. You see what my workers do. It's different to have an alt college
8 mining is not popular. Take the sword to the side and win by surprise! It's a mistake! Why is it cold? Nobody does it, so it's cold! The country has not considered this instry well, this instry is the most inferior instry, you want to be famous in this instry, silly dream! I'm sorry to say that I'm a coal miner when I go out! And in order to show a little dignity in front of others, the students working in the coal mine and others are all pretending to be big money, pretending to be generous and boasting. Why? There's only a little self-esteem left
9 the safety of large state-owned coal mines. It's better than a small coal mine! Advanced coal mining enterprises in China and even in the world reported on TV! Not the same, there are accidents, and can be seen on TV are big, sporadic on too much! Coal mine has a safety index called "million ton mortality". Do you know what it is? Casualties per million tons of coal. It shows that it is difficult for coal mines to survive
10. Neither can metal mines. Five of my classmates are working in metal mines. They are also very hard! For coal mines, there is no gas disaster and coal st explosion! Mining areas are deep in the mountains! Four of them haven't found their daughter-in-law now! And I heard that the metal mine has radiation! Bad for people! I bought all the houses in the city, but I come back to live for one or two months every year! However, the work is not as hard as coal mine, the treatment is better than coal mine
the coal mine is hard!