Designing method of coal pillar dam body of coal mine underground reservoir

Abstract

The invention relates to a designing method of a coal pillar dam body of a coal mine underground reservoir and belongs to the technical field of comprehensive utilization of mineral engineering and hydraulic engineering. The problems that in the prior art, a designing method of the coal pillar dam body of the underground reservoir has blindness and lacks in scientificity and practicability are solved. The designing method comprises the following steps that firstly, physical and mechanical parameters of coal and rock with different water contents are tested; secondly, deformation and stress distribution models of the coal pillar dam body of the underground reservoir are established; thirdly, a coal body ideal elasto-plastic strain softening model is established; and fourthly, a coal pillardam body elasto-plastic deformation model is established, and a coal pillar dam body width calculation method is obtained. According to the designing method of the coal pillar dam body of the coal mine underground reservoir, the data calculation amount is small, and the reliability and calculation precision in design of the coal pillar dam body of the underground reservoir can be improved.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of mining engineering and water conservancy engineering, in particular to a method for designing a coal pillar dam body of an underground reservoir in a coal mine. Background technique [0002] Inner Mongolia, Shanxi, Shaanxi, Xinjiang, Ningxia and other western provinces are important coal production bases for my country's energy strategy and security, and the provinces are located in my country's arid-water-deficient zone and semi-arid-water-poor zone. Water resources restrict coal mining and security in this area It is the leading factor of ecological security and plays the role of basic configuration. In the ecologically fragile western mining area, the realization of safe and efficient mining of coal and the protection of groundwater resources are the major problems faced by coal mining in the western mining area. [0003] Scholars have proposed to use the goaf formed after ...

AI Technical Summary

Problems solved by technology

The intrusion of water weakens the mechanical properties of the coal pillar, reduces the strength of the coal pillar, and greatly affects the stability of the coal pillar dam.

[0004] The existing coal pillar dam design methods and technologies for underground reservoirs mainly rely on on-site practice and experience summarization. In the practice process, there is a large amount of blindness, a large amount of calculation, and a lack of scientificity and practicality.

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