Soft coal seam long-wall high-mining-height comprehensive mechanized coal mining end mining method

Abstract

The invention relates to a coal mine underground end mining method, in particular to a soft coal seam long-wall high-mining-height comprehensive mechanized coal mining end mining method, and solves the problem of coal wall collapse brought by end mining under the condition of a working face of a long-wall high-mining-height soft coal seam existing in the prior art. The mining height of the high-mining-height long-wall working face is more than over 3.5 m; a feed-return working face arrangement mode is at least adopted; and after the working face is pushed to an end mining line, a bracket stops to move forwards, then a tunneling machine is arranged at the tail of the working face, and a support dismantling passage is made by using a comprehensive tunneling process to finish end mining. The process has high capacity of adapting to complex geological conditions. The place and time of end mining can be flexibly selected according to the geological conditions and a roof pressure change rule, and the safety coefficient is high.

Description

[0001] technical field [0002] The invention relates to an underground coal mining technology, in particular to a comprehensive mechanized coal mining method with long walls and large mining heights in soft coal seams. Background technique [0003] At present, there are two main ways for the final mining of comprehensive mechanical coal mining face in my country's coal mines: the first is the net laying at a certain distance from the final mining line that has been used in the final mining of fully mechanized mining face, and the net is laid behind the tail beam. Stop pulling the frame, then remove the frame of the bracket and the slide, cut out the withdrawal passage with a coal shearer, and then carry out the support withdrawal passage. The second is the retraction installation process of multi-channel multi-channel rubber-tyred trucks used in the fully mechanized mining face of the Shendong mining area in my country. That is, at the stop line of the mining face, two auxi...

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Problems solved by technology

[0005] In order to solve the problem of coal wall collapse caused by final mining in the working face of soft coal seam with long wall and large mining height in the prior art, the present invention provides a comprehensive mechanized final mining method for long wall and large mining height of soft coal seam

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