How deep are the mines of the average large coal mine now?

Underground mining in large state-owned coal mines is generally at a depth of several hundred to a thousand meters, and the depth of open-pit mining is very small. The larger the coal mine, the greater its coverage, and the longer it will take for workers to reach the working face, as shown below. The time for workers to go down the mine is not necessarily, generally a one-way trip of ten minutes to one or two hours, the key is to see how long the road to walk.

The influencing factors are as follows:

1.The depth of the working face and the conditions of the coal mine: the working face is the place where the workers work, and the workers can take the tank cage (up and down, similar to the elevator), the monkey car (similar to the Trojan horse played by children), the mine car, etc., the "trolley" you say should be the mine car, the mine car is along the roadway into the underground, the depth of each coal mine face is different, the inclination angle of the roadway is not the same, so the distance from the ground to the working face of the mine truck is different for each mine. Divided by the minecart speed (which is also different), the time taken is of course different.

And the underground conditions basically do not allow the minecart to drive directly to the working face, the workers have to walk for a period of time after getting off the minecart (the length of time is also different) to reach the working face, generally speaking, the time you ask is uncertain, but according to the convention, it is basically about ten minutes (Datong Tashan Coal Mine) to one or two hours (two coal mines under the South Coal).

2.Coal mine production life: If it is open-pit mining and Pingtong mining (the roadway is horizontal), you don't need to take a car to get there, but with the mining work, the surface coal is revealed, the depth and breadth are getting bigger and bigger, and the workers have to walk longer and longer to the work site, and the time will be relatively more, and in the end, even if you take a car to go down the mine, it will take a lot of time.

To sum up, the general rule is that the deeper the coal seam in the coal mine, the longer it takes for the workers to reach the working face; As the production life of the coal mine increases, the time it takes for workers to reach the working face increases. But there are other influencing factors, which cannot be written here, and these two points are the most important. In general, the time taken by the workers to go down the mine has been said at the beginning, and I don't know if I am satisfied!

The shallowest well is 800 meters after the car gets off is a section, more than 100 meters after doing 400 meters after the car gets off is the second section in the 400 meters before entering the mining yard (the place where the wagon is stored), and the mining place is more than 300 meters away.

The maximum is more than 1,000 meters, generally with an annual output of more than 10 million tons, and the small well is also more than 200 meters.

1. The depth varies across the country. The shallowest open-pit coal mine is about 100m, and the deepest mine in the country is currently more than 1,000m.

2. There are three main types: the main shaft bucket is lifted with vertical well; The inclined shaft is hoisted by a minecart; The flat can be transported directly out with a belt.

3. The locomotive is about the locomotive head. The small ones can go directly down from the auxiliary well or the main shaft, and the large ones need to be disassembled and transported to the underground for installation.

Hello, according to the scale of mine construction, it is 30 years for large mines, 20 years for medium mines, and 10 years for small mines. If the "Measures for the Administration of Mineral Resources Exploitation Registration" and the seven articles of the calendar are large-scale or more, the mining license shall be valid for up to 30 years; For medium-sized ones, the mining license is valid for up to 20 years; For small ones, the mining license is valid for up to 10 years. If the mining license expires and it is necessary to continue mining, the mining right holder shall call the pants 30 days before the expiration of the mining license and go through the renewal registration procedures with the registration management authority.