Short-wall waste rock gluing continuous mining and continuous filling mining method

Abstract

The invention discloses a short-wall waste rock gluing continuous mining and continuous filling mining method and belongs to the technical field of coal mine filling and mining. The problem that in the prior art, due to the fact that an overlying strata above a goaf directly collapses, surface deformation is severe is solved. The method comprises the steps that a coal seam is divided into a plurality of strip coal pillars according to the fixed width in the direction parallel to open-off cut, then the strip coal pillars are mined sequentially at intervals through a continuous mining machine, the strip coal pillars are filled sequentially at intervals after a roof is stabilized, specifically, cement slurry and waste rock reach a working face through a grouting system and a waste rock delivery system correspondingly, are mixed and are injected for filling a branch roadway, and the filling and mining process is completed. The short-wall waste rock gluing continuous mining and continuous filling mining method is adopted for filling and mining, the roof does not sink, only bending deformation happens, and the defects of wall type caving mining are overcome effectively; and meanwhile, surface deformation is small, surface buildings can be effectively protected, and a new idea is provided for three-underground mining.

Description

technical field [0001] The invention relates to the technical field of coal mine filling and mining, in particular to a short-wall gangue cemented continuous mining and continuous filling coal mining method. Background technique [0002] With the mining of my country's coal gold for ten years, the problem of "three under" coal pressure that restricts the development of coal has become more and more prominent. According to incomplete statistics, the amount of "three under" coal pressure in my country has reached 14 billion tons. How to mine safely and efficiently "Three downs" coal resources, more and more people's attention. [0003] At present, the mining technology in the existing technology mainly adopts the wall caving mining method. The overlying strata in the goaf directly collapse, resulting in serious surface deformation and large subsidence. The problem is getting worse. CN103883350A discloses a filling coal mining method with skip mining at intervals. The method i...

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Problems solved by technology

[0003] At present, the mining technology in the existing technology mainly adopts the wall caving mining method. The overlying strata in the goaf directly collapse, resulting in serious surface deformation and large subsidence. growing problem

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