A coal-pillar-free mining method for ultra-high water material filling working face gangue pumping and retaining roadway

Abstract

The invention provides a superhigh-water material filled working face gangue pumping gob-side entry non-pillar mining method. The method specifically comprises the steps of establishing a superhigh-water material filling system and a mine gangue pumping and filling system respectively; excavating a haulage roadway and a track roadway and forming a cutting hole in a mining area to form a complete first mining working face; conducting mining on the mining working face according to the normal working procedures; conducting backfilling on a mined goaf through a superhigh-water material; conductingfilling on the portion, where the roadway needs to be reserved close to the working face, of the goaf by pumping gangue filling bodies; after completion of filling, reserving the track roadway as thetrack roadway of a next working face, and excavating a new haulage roadway and forming a cutting hole to form a second mining working face; after completion of filling, reserving the haulage roadwayas the haulage roadway of the next working face, and excavating a new track roadway and forming a cutting hole to form a third mining working face, and repeating the steps. Through the superhigh-watermaterial filled working face gangue pumping gob-side entry non-pillar mining method, the strata pressure intensity of the working face is weakened, non-pillar mining is realized, and the mining rateof the mining area is remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and relates to a coal pillar-free mining method, in particular to a coal pillar-free mining method for ultra-high water material filling working face gangue pumping and retaining roadway. Background technique [0002] Compared with the general fully mechanized mining technology, the filling mining technology can effectively control the surface subsidence and deformation of the "three-down" coal-pressing mining by filling the filling material into the goaf, and prevent deep coal and rock dynamic disasters. The prevention and control of "three downs" coal pressing and deep well power disasters provide an effective technical approach. [0003] For coal mines that use gangue filling, filling gangue and other solid wastes into underground gobs reduces the cost of lifting coal mine gangue and underground transportation and solves the problem of gangue piles. However, the amount of gangue produced ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the "three-down" coal mining mines, under the premise of meeting the requirements of controlling surface subsidence, effectively solving the problems of underground gangue treatment, increasing recovery rate, reducing roadway excavation rate, and realizing coal pillar-free mining. The invention provides a super high Mining method without coal pillar by pumping gangue pumping and retaining roadway in working face filled with water material

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