Pipe laying method for subsidence area of coal mine

Abstract

Disclosed is a pipe laying method for a subsidence area of a coal mine. A high-density polyethylene pipe, which is good in flexibility, penetrates the coal mine subsidence area and is disposed in a cover plate pipe ditch, a pipe ditch top plate is 0.5m away from the ground, and the pipe ditch width is about 1m wider than the outer diameter of the pipe. The pipe is laid in the pipe ditch in a curved S shape, two sides of the pipe are filled with cushioning materials such as yellow sand and saw powder, and rubber supports which are about 20cm are arranged for every 30m to 50m at the bottom of the pipe. According to the method, the pipe can resist effects of large deformation of the ground surface such as mining area uneven settlement and buckling deformation, the normal operation of the pipe during the ground surface subsidence can be guaranteed, damage to the pipe due to additional internal force caused by ground surface settlement can be effectively prevented, relocation land resources are greatly saved, the structure is simple, implementation is convenient, investment is small, the effect is good, and wide practicality is provided.

Description

technical field [0001] The invention relates to a pipeline laying method in a coal mine subsidence area, which is suitable for a new pipeline project for preventing and controlling large deformation of the ground surface in an uneven subsidence area. Background technique [0002] In order to meet the social and economic development, people have increased the development and utilization of underground resources. Coal, oil, natural gas, groundwater and other resources are continuously extracted from the ground, which will inevitably damage the underground rock mass and soil. The original stress balance state causes the stress redistribution in the rock and soil body, and the rock stratum moves, deforms and destroys. When the underground mining area reaches a certain range, the movement that starts near the stope will expand to the surface, forming a surface deformation zone. Whether it is mining technology to reduce surface subsidence, including room-and-pillar mining, partial...

AI Technical Summary

Problems solved by technology

When the surface is substantially deformed due to underground coal mining activities, the underground pipeline will bear a huge additional internal force. Once the load on the pipeline exceeds its own allowable strength, rupture or even fracture accidents will occur, which will affect the pipeline. normal use

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