Solid filling gob-side entry retaining process system and construction method

Abstract

The invention discloses a solid filling gob-side entry retaining process system and a construction method in order to achieve direct entry retaining in the solid filling process. The solid filling gob-side entry retaining process system comprises a set of waste rock blocking and grouting equipment such as a set of self-made telescopic high-strength waste rock blocking plate, a filling material stirrer, a high-pressure grouting machine and a grouting pipeline system and cooperation of the waste rock blocking and grouting equipment in space and time. The gob-side entry retaining process system mainly comprises the steps of fixing the self-made waste rock blocking plate, conducting direct high-pressure grouting entry retaining and the like. The specific construction method comprises the stepsof waste rock blocking plate supporting, grouting material stirring, grouting pipeline inserting, high-pressure pumping operation and roadside body forming. According to the process method, the problems that a waste rock bag and other traditional supporting modes are complex in process and poor in effect can be solved, equipment, cost and workloads of independent filling entry retaining operationcan be reduced, goaf filling operation and entry retaining operation do not interfere with each other, that a goaf filling body and a roadside filling body are tightly connected can be kept, synergistically integrated and supported together, and the effect of achieving two purposes of filling and entry retaining is achieved.

Description

technical field [0001] The invention belongs to the technical field of solid filling green mining in the coal industry. Background technique [0002] Gangue solid filling technology has become an important green mining technology to solve the "three-down coal pressing" and improve the environment of mining areas. It has been widely used because of its social, economic and environmental benefits. In the conventional filling of coal mines, a filling support of "pre-mining and post-filling" is often used, so the solid filling can realize the synchronous integrated operation of mining and filling, which is more beneficial for long working faces and no roadways on both sides. [0003] However, if you want to directly retain the roadway in the solid filling stope, the gangue filling body on the side of the roadway is relatively loose, and there is no cohesion between the particles, so it cannot maintain its own independence and stability, and cannot effectively bear and support th...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of high difficulty and low benefit of solid filling roadway retention, a set of process design and construction method for gangue solid filling roadway retention along the edge of the mining and filling area is directly consolidated and strengthened to form a certain The wide and high-strength roadside support body cooperates with the goaf filling body to control the roof and maintain the roadway, which can achieve the effect of filling and retaining the roadway at the same time

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