Method for setting up end-mining and withdrawal roadway for fully mechanized coal mining face with large mining height

Abstract

The invention discloses a method for setting up an end-mining and withdrawal roadway for a fully mechanized coal mining face with large mining height. The method is used for improving the coal wall stability and increasing the coal recovery rate at the final end-mining stage on the fully mechanized coal mining face with the large mining height. According to the method, when a coal mining machine is adopted to advance the fully mechanized coal mining face to a position 15 m-25 m away from a stopping line, a roof of the fully mechanized coal mining face is supported with anchor bolts, anchor cables, a metal net and steel wire ropes while the mining height of the fully mechanized coal mining face is reduced, a hydraulic support stops moving when the fully mechanized coal mining face is advanced to a position 3 m-6 m away from the stopping line, the slope of the fully mechanized coal mining face is expanded to the stopping line by the coal mining machine to form the withdrawal roadway which is wider at the upper part and narrower at the lower part, and the coal wall side is step-shaped. The method is applicable to the fully mechanized coal mining face with intense coal wall caving, poor stability and the low coal recovery rate at the final end-mining stage of the fully mechanized coal mining face with the large mining height.

Description

technical field [0001] The present invention relates to the technical field of mine engineering, and in particular to a method for leaving a retraction roadway at the end of a fully mechanized mining face with a large mining height, which is suitable for strong coal walls and poor stability at the end of the mining and harvesting stage of a fully mechanized mining face with a large mining height , Fully mechanized mining face with low coal recovery rate. Background technique [0002] my country's fossil energy structure with more coal, less oil and less gas determines the dominant position of coal in my country's energy. With the rapid development of my country's economy, the demand for energy has increased rapidly. How to efficiently mine and utilize coal resources has become a major issue facing the energy industry. question. In view of the current situation and the occurrence of coal in our country, my country actively proposes high-efficiency coal mining technologies suc...

AI Technical Summary

Problems solved by technology

Finally, it can solve the problems of strong coal wall spallation, poor stability and low coal recovery rate at the final mining and closing stage of the large mining height fully mechanized mining face, and realize the improvement of the coal wall stability, Purpose of Coal Recovery Rate

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