Method for fully mechanized continuously-filling coal mining of steeply pitching coal seam

Abstract

The invention provides a method for fully mechanized continuously-filling coal mining of steeply pitching coal seams, which comprises the following steps: a stoping face is arranged as per the method of long-wall mining along the strike, and fully mechanized mining equipment for the steeply pitching coal seam is adopted; an air cushion and a working face filling pipeline are arranged on a base on the side of a mined out space of rear pillars of a fully mechanized mining support; whenever the working face advances for every 1.4 to 1.8 meters and after the support is moved, the working face filling pipeline is connected with an upper gateway filling main pipeline; the air cushion is filled with air, and auxiliary separation is arranged; paste is conveyed to a filling pipe branch sequentially from low to high so as to ensure filling and compacting, and finally the paste is conveyed to a supplementary filling pipe of the upper gateway; after the paste is coagulated, a portion of air in the air cushion is released, and the working face advances forward continuously; the steps are repeated until the stopping work for the whole working face and the filling work for the mined out space are finished. The method provided by the invention is convenient to operate and simple to carry out, can improve the mechanization level for mining the steeply pitching coal seams under buildings, railways and water bodies, improves the output of the working face, efficiently reduces the roof subsidence and the ground deformation, and realizes coal mining without the pillars and achieves Y type ventilation.

Description

technical field [0001] The invention relates to a goaf filling mining method for underground mining of coal mines, in particular to a fully mechanized coal mining method for steeply inclined coal seams with continuous filling. Background technique [0002] With the rapid development of my country's economy and society, the high-intensity mining of coal over the years has reduced the number of coal seams with better conditions in the eastern mining areas and shallow areas, thus making the mining of "three-down" coal pressing and steeply inclined coal seams The research on the problem has entered an important stage, which has attracted great attention from the scientific community and enterprises. Steeply inclined or steeply inclined coal reserves account for about 15% to 20% of the national coal reserves, especially in the west and south of my country, most mines have steeply inclined coal seams, and steeply inclined coal seams are the main mining coal seams in many mining are...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems existing in the existing steeply inclined coal seam filling mining, the present invention provides a fully mechanized steeply inclined coal seam continuous filling coal mining method

The invention can improve the mechanization level of steeply inclined coal seam mining, greatly increase the output of the working face, improve the conditions of the working face, reduce the labor intensity of workers, can solve the problems of high pressure on the surrounding rock of the roadway, effectively control the deformation of the ground surface, and solve the "three problems" of the steeply inclined coal seam. It can also realize coal pillar-free mining and Y-shaped ventilation, improve coal recovery rate, prevent gas accumulation, air leakage and spontaneous combustion of coal seams

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