A mining method for pressing coal under a shallow buried gas pipeline

Abstract

The invention discloses a mining method for pressing coal under a shallow buried gas transmission pipeline, which comprises the following steps: (1) establishing a surface subsidence curve equation W to predict the subsidence of the surface along the pipeline direction after resource mining; (2) calculating The bending moment and the maximum bending stress of the shallow buried gas pipeline; (3) determine the protection range of the shallow buried gas pipeline; (4) erect a suspension bridge along the direction of the pipeline according to the protection range determined in step 3, and lift the pipeline in the subsidence area (5) Mining the coal resources under the pipeline in a conventional way, and removing the suspension bridge after the subsidence is stable, and repeating the above steps before the mining of the next working face, until all the resources in the mining area are recovered. According to the influence of dynamic deformation on the shallow buried gas transmission pipeline during the mining of coal resources, the present invention can protect the shallow buried gas transmission pipeline by using the method of suspending the pipeline with a suspension bridge, so that the stagnant pressure under the pipeline can be mined by adopting the normal mining method coal resources.

Description

technical field [0001] The invention relates to a mining method of compressed coal, in particular to a mining method of compressed coal under a shallow buried gas transmission pipeline, belonging to the field of coal mining. Background technique [0002] Surface subsidence induced by coal mining will cause great damage to the surface environment and structures. my country's long-distance gas pipelines pass through the distribution areas of major coal fields in my country. With the continuous expansion of coal mining areas, more and more gas pipelines will be affected by mining subsidence. The high-pressure gas in the pipeline is flammable and explosive. Once the gas leaks or the pipeline breaks, it will easily cause a major accident, causing heavy casualties and property losses, and seriously endangering social production and the national economy. [0003] Most of the existing gas pipelines are shallow-buried gas pipelines, and the protection method is mainly to leave prote...

AI Technical Summary

Problems solved by technology

[0004] (1) The layout of the shallow buried gas pipeline relative to the coal mining face is random, and the coal pillars for pipeline protection in coal mining will have a great impact on the layout of the coal mining face and the way of coal mine development in the mining area

[0005] (2) Generally, the protective coal pillars along the shallow buried gas pipeline are relatively wide, and the width of the protective coal pillars is generally about 1000m, which will cause a lot of waste of coal resources

[0006] (3) The stagnation of coal resources along the shallow buried gas pipeline will have a huge impact on the production and economic benefits of the mining area, affecting the sustainable development of the mining area

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