Structure for protecting stability of surrounding rock of development roadway and construction method

Abstract

The invention discloses a structure for protecting stability of surrounding rock of a development roadway and a construction method. The structure for protecting the stability of the surrounding rockof the development roadway comprises a depressurizing roadway which is arranged between the boundary of a protective coal pillar of a current stope face and an auxiliary transport roadway, the depressurizing roadway communicates with an air return way and a haulage gate of the current stope face, and a presplitting tape is arranged on a roof of the decompressing roadway. The construction method ofthe structure comprises the following steps: determining the digging position of the depressurizing roadway between the boundary of the protective coal pillar of the current stope face and the auxiliary transport roadway; digging the depressurizing roadway along the direction which is parallel to the auxiliary transport roadway; supporting two surrounding rocks and the roof of the depressurizingroadway; when construction of the depressurizing roadway is finished, carrying out presplitting construction on the roof in the depressurizing roadway; and constructing closed walls on two ports of the depressurizing roadway. The required width of the protective coal pillar of the large roadway is reduced, the recovery rate of the face is increased, meanwhile, the depressurizing roadway and the protective coal pillar of the large roadway jointly protect the roadway, the service life period of the roadway is prolonged, repair time and capital are saved, and the structure plays an important rolein implementation of safe and effective mining of a coal mine.

Description

technical field [0001] The patent of the invention belongs to the technical field of mining influence control in coal mines, and specifically relates to a structure and a construction method for protecting the stability of the surrounding rock of a developed roadway. Background technique [0002] The deformation of the surrounding rock of the roadway is a common geological disaster. The deformation of the surrounding rock of the roadway will increase the difficulty of construction, greatly prolong the construction period, cause a waste of funds and increase the cost, and even worse, the project will be terminated. In recent years, production accidents caused by the deformation of surrounding rocks in roadways have occurred frequently, which is one of the key problems that plague the development of the coal industry. Summarizing and analyzing the research results in recent years, the surrounding rock deformation is mainly divided into three categories: the deformation caused ...

AI Technical Summary

Problems solved by technology

[0002] The deformation of the surrounding rock of the roadway is a common geological disaster. The deformation of the surrounding rock of the roadway will increase the difficulty of construction, greatly prolong the construction period, cause a waste of funds and increase the cost, and more serious cases will cause the project to be terminated

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