Anti-scour method for wide excavation and narrow roadway development in rock burst coal seam

Abstract

The invention provides an anti-scour method for widening and narrowing roadway development in rock burst coal seams, which includes increasing the designed width of the original roadway design by increasing the preset value to obtain the planned width of the roadway, and reducing the designed width of the original coal pillar between roadways to the preset value. Sets the value width. The excavation plan develops the first wide excavation roadway with the width of the roadway, and constructs the first filling body with a preset numerical width on either side of the first wide excavation roadway. Excavating a roadway with the second widest width along the first filling body, and constructing a second filling body on the side adjacent to the first filling body in the second widening development roadway. Excavate along the first wide excavation roadway away from the side of the first filling body or the second wide excavation development roadway on the side away from the second filling body and excavate the third wide excavation roadway and leave a lane with a width of a preset value between the development roadways For small coal pillars, the third filling body is constructed on the side of the small coal pillars adjacent to the roadway in the third wide excavation roadway. Thereby reducing the supporting pressure of the coal pillars in the roadway developed by the rock burst coal seam.

Description

technical field [0001] The invention relates to the technical field of safe mining in coal mines, in particular to an anti-scour method for developing wide and narrow roadways in rock burst coal seams. Background technique [0002] Rockburst is a serious coal-rock dynamic disaster. In recent years, there have been many accidents of rockburst in modern mines with extra-large production capacity in western mining areas. What is unusual is that these mines often have rockbursts when they develop roadways. The development of roadway is different from the recovery roadway. The development of roadway is the core hub of mine production. It has the characteristics of long service time and high support and maintenance costs. Therefore, once the development of roadway has large deformation or rock burst accidents, it will have a huge impact on the production of the entire mine. . [0003] Through the analysis of the causes of such accidents, it is found that the coal seam development...

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Problems solved by technology

[0004] In view of the above-mentioned problems, the present invention is proposed in order to provide a kind of anti-scour method that overcomes the above-mentioned problems or at least partially solves the above-mentioned problems, which can significantly reduce the impact of rock burst coal seam development roadway. The supporting pressure of the coal pillar solves the problem of large deformation of the open roadway near the coal pillar under the arrangement of wide coal pillars in the roadway, reduces the risk of rock burst, and significantly improves the recovery rate of mine resources

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