Method for recovering large mining height fully-mechanized face end part ground coal
A technology of large mining height and fully mechanized mining face, which is applied in surface mining, earth drilling, underground mining, etc., and can solve the problems of restricting efficient mining of large mining height fully mechanized mining face, increasing roadway excavation and maintenance costs, passivity, and danger high cost and other problems, to improve the support effect, facilitate the promotion and application, and achieve the effect of efficient production
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[0024] Implementation of the present invention will be further described below in conjunction with accompanying drawing:
[0025] The present invention reclaims the method for bottom coal at the end of a fully mechanized mining face with a large mining height, and the specific steps are as follows:
[0026] 1. First, add 2 to 3 sets of hydraulic supports 6 on the side of the working face in the return air level roadway 1 of the fully mechanized mining face with large mining height, such as figure 2 (a, b);
[0027] 2. According to the daily advancing speed, in the transport level roadway 8 of the fully mechanized mining face with large mining height, the bottom coal 11 is artificially lifted 4-6m ahead of the bottom coal 11 along the advancing direction of the working face, and the height of the bottom coal 11 is 1-1.5m m, bottom coal starting slope γ is less than 10°, such as image 3 (a, b);
[0028] 3. Use the shearer 5 to cut coal upward from the transport alley 8 to t...
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