Combined Construction Method for Preventing Gas Leakage and Floor Drum Deformation of Coal-bearing Seam Floor in Coal Mine

Abstract

The invention belongs to the field of mining safety and particularly relates to a united construction method preventing gas leakage and bottom heave deformation of a coal-included layer base plate of a coal mine. Base corners of the two sides of a roadway and the base plate are drilled, and steel pipes are inserted into all holes. The diameter of the steel pipes is smaller than the diameter of the drill holes. A plurality of through holes are evenly distributed in the surfaces of the lower portions of the steel pipes, and annular steel plates are welded to the junctions of areas with the through holes and areas without the through holes of the steel pipes. The annular steel plates are provided with annular rubber buffering layers in a sleeved mode, and the parts between the steel pipes and the drill holes are filled with concrete. After filing is finished, the steel plates are connected to the upper ends of the steel pipes to integrally connect all the steel pipes into a whole, trays and nuts are used for fixing the steel pipes in the drill holes, and finally wooden wedges are wedged into the gaps between the steel pipes of the two sides and the two sides respectively. According to the united construction method, in the construction process, the two processes of gas extraction and bottom heave deformation prevention are combined into one process, construction efficiency is greatly improved, mining cost is reduced, and mining safety can be effectively guaranteed.

Description

technical field [0001] The invention belongs to the field of mining safety, and in particular relates to a combined construction method for preventing gas leakage and bottom drum deformation of a coal-bearing seam floor in a coal mine. Background technique [0002] During the roadway excavation process in the coal seam, a large amount of gas will inevitably be exposed, especially in the roadway support process, due to the use of bolt support, the gas will overflow from the bolt hole, which will bring serious safety hazards to mining safety. Hidden danger. In the prior art, the gas concentration is mostly diluted by drilling and pumping gas. [0003] In addition, as the mining depth increases, the roadway stress increases, the roadway deformation is serious, and the bottom plate has different degrees of floor drum deformation. There are a large number of technologies in the prior art, such as methods for supporting by anchor rods, anchor cables, and flexible steel frames. ...

AI Technical Summary

Problems solved by technology

However, the current technical means only consider one aspect alone, and there is no technology for joint control of gas leakage and bottom drum deformation at the same time, which leads to increased costs and reduced efficiency in the mining process

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