Method for increasing recovery rate of fully mechanized caving face
A fully mechanized caving face and recovery rate technology, which is applied in surface mining, earth drilling, underground mining, etc., can solve the problem of low recovery rate of fully mechanized caving face, so as to alleviate energy shortage, reduce fire hazards and safety significance significant effect
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[0011] The method of improving the recovery rate of fully mechanized caving working face is to cut coal only in the first 20 meters of coal seam, and press the roof of the working face after the first 20 meters of coal seam, and carry out the coal mining operation according to the cycle of one knife, one discharge and multiple rounds of coal discharge, until the end of the work 60 meters before the stop production line on the face, and the mining-drawing ratio is greater than or equal to 1:1.2 and less than 1:1.1, the coal-drawing step is 0.8-1.2m, and the coal-drawing ratio is greater than or equal to 1:1.1, the coal-drawing step is At 0.6-0.8m, from 60 meters before the production stop line to the stop production line, only coal is cut.
[0012] In the method for increasing the recovery rate of the fully mechanized caving face mentioned above, the hydraulic support for top-coal caving is selected from the low-level top-coal caving hydraulic support. The model of the middle su...
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