Arrangement and construction method of special roadway for withdrawing working face of coal mining area

Abstract

The invention discloses an arrangement and construction method of a special roadway for withdrawing a working face of a coal mining area. The method comprises the following steps of: firstly, arranging a roadway parallel to an uphill and downhill of the mining area as the special roadway for withdrawing the working face of the mining area at the middle position between the uphill and downhill of the mining area and a mining stopping line of the working face, and tunneling the withdrawing roadway by adopting an existing uphill and downhill roadway tunneling method, wherein the tunneling direction is from a transportation gate road to an air return gate road; tunneling and primarily supporting the withdrawing roadway; after supporting is finished, constructing a blasting drill hole in the direction from the vertex angle position of the side face of the working face to a top plate, and carrying out blasting roof cutting, namely cutting off a key layer of the top plate in a blasting mode;and after blasting roof cutting, carrying out secondary reinforcing and reinforcing supporting by adopting an anchor cable. According to the method, smooth withdrawing of the working face can be realized, meanwhile, resource loss can be reduced, and the withdrawing roadway can be arranged between the uphill and downhill of the mining area and the mining stopping line of the working face on the premise of allowable conditions.

Description

technical field [0001] The invention belongs to the technical field of coal mining. Background technique [0002] When the coal mine working face is withdrawn, it is necessary to withdraw hydraulic support, coal shearer, scraper conveyor and other equipment to another working face; the current withdrawal path is generally through the mining area uphill or mining area downhill roadway (referred to as the mining area up and down the hill) to withdraw the equipment. Since the retraction equipment takes a long time to go up and down the mountain, it affects the production and transportation of other working faces. [0003] In order to understand the purpose of the present invention, the layout and use of the mining area up and down the mountain are introduced below: the main mode of deep coal mining is underground mining, reaching the mining level of the coal seam with vertical shafts, and developing transportation lanes and layout along the coal seam. Mining area, each mining...

AI Technical Summary

Problems solved by technology

When the stop production line of the working face is far away from the upper and lower hills of the mining area, that is, when the protective coal pillar size of the upper and lower hills of the mining area is large, the upper and lower hills of the mining area are outside the influence range of the advanced bearing pressure caused by the mining of the working face. The impact of going up and down the mountain in the mining area is relatively small, and it will basically not cause mine pressure such as deformation of the roadway. Recently, when the size of the protective coal pillar up and down the hill in the mining area is small, the corresponding resource loss is small, but the impact of the advanced support pressure caused by the mining face on the up and down hill in the mining area will be more obvious, and even cause a large roof subsidence, Severe mine pressures such as coal wall slabs appear

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