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What is the upper corner of the coal face?
Release time:
2022-11-02
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What is the upper corner of the coal face?
- What is the upper corner of the coal face?
The upper corner is generally a mining noun, which refers to the return air side of the coal mining face and the triangular zone near the upper side of the return air lane and the edge of the goaf. The ventilation in this area is not good, the temperature and humidity are relatively high, it is easy to accumulate the gas released by the intersection of goaf and mining face, and the gas concentration is high, which is the focus of gas prevention and control in the working face.
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Key words:
Face, gas, work, higher, coal mining, goaf, return air, what, working face
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