Where is Helanshan Coal Mine?

Helanshan Coal Mine is located at the junction of Ningxia and Inner Mongolia.

At present, the minerals surveyed on Helan Mountain are very rich, including coal, iron, salt and Helan stone. Among them, Helanshan coal has high output and good quality. Coal mining has been recorded in Helan Mountain since the Qing Dynasty.

Helan Mountain can be said to be a treasure trove of geomantic omen. The local forest resources are also very rich, and the species of animals and plants are also diverse. But when it comes to the industry that supports the development of Helan Mountain, it is the mining of coal industry, which also attracts many foreigners to collect coal mines.

In Helan Mountain area, * * * has gathered thousands of small coal mining workshops. At the beginning of mining, people didn't realize that over-exploitation would bring hidden dangers to the coal industry in Helan Mountain, blindly expand the mining scope, and cut down forests and destroy vegetation for mining.

Coal mining methods commonly used in China at present

1, strike longwall mining method: longwall working face advances along strike.

2. Inclined longwall mining method: a coal mining method in which longwall faces advance along inclined planes.

3. Inclined slicing mining method: thick coal seam is mined in layers along the inclined plane.

4. Longwall caving mining method: When mining a thick coal seam with a gentle dip angle of more than 6m, first extract the coal from the longwall working face at the bottom of the coal seam, and then extract the top coal.

5. Shield support mining method: In steeply inclined coal seam, the mining faces are arranged along the strike, the goaf is separated from the working space by shield support, and the mining method is inclined to advance.

6. Pseudo-inclined flexible shield support coal mining method: in steep coal seam, pseudo-inclined coal mining face is arranged, and the goaf and working space are separated by flexible shield support, and it is advanced along the strike.

7. Inverted bench mining method: In the steeply inclined coal seam stage or section, the lower advanced bench working face is arranged and pushed along the strike.

8. Positive bench mining method: In the steeply inclined coal seam stage or section, the upper advanced bench face is arranged along the pseudo-oblique direction, and the mining method is advanced along the strike.

Baidu encyclopedia-Helan mountain range