Method for filling gas near roadway of coal mine gob-side entry retaining

Abstract

The invention discloses a method for filling a gas near a roadway of coal mine gob-side entry retaining, comprising the following steps: firstly, arranging a gas pressurization room on the ground; then, arranging a gas booster pump in an underground mining area haulage roadway 3; arranging a cylinder rubber air sac as high as the mining height on one side close to a goaf along the gob-side entry retaining behind a coal face; aerating the cylinder rubber air sac arranged on one side close to a goaf by the gas booster pump until roof contacting; when the pressure gage of the gas booster pump displays that the pressure reaches the stress of a primary rock, stopping aerating, sealing the cylinder rubber air sac to finish the aeration operation of one cylinder rubber air sac; and when the coalface is continuously advanced, continuously arranging one cylinder rubber air sac behind one aerated cylinder rubber air sac every time the coal face is advanced by one step, and aerating one by one until one exhausting body on one side of the goaf 5 along the gob-side entry retaining 6 is filled and supported. The method is simple, is convenient to operate and has the advantages of small labor intensity of workers and good supporting effect.

Description

technical field [0001] The invention relates to a gas filling method for the side of a gob-side entry in a coal mine, and is especially suitable for filling the side of a gob-side entry in a coal mine mining face. Background technique [0002] Gobside retaining means that after the upper section of the working face is mined, by strengthening the support or adopting other effective methods, a trough in the upper section of the working face is preserved, and it is used as a trough in the mining of the lower section of the working face. . As a major reform of the mining process, the use rate of gob-side entry retention is relatively high abroad, but it has just started in China and the speed of technology promotion is not high. Gobside entry retaining has significant advantages such as increasing the recovery rate of coal resources, reducing the rate of excavation, alleviating the alternate tension between excavation and recovery, reducing the cost of relocation of the working...

AI Technical Summary

Problems solved by technology

However, these materials still have some shortcomings in the filling process, such as insufficient early compressive strength of the filling body, too long setting time of the filling body, difficulty in conveying the filling material, and high filling cost, etc.

Images