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

A technology of underground reservoir and design method, which is applied to mining equipment, mining equipment, earthwork drilling and mining, etc., can solve the problems of large blindness, large amount of calculation, and reduction of coal pillar strength, etc., and achieve simple design method and data calculation The effect of small amount and high calculation accuracy

Active Publication Date: 2019-03-08
CHINA UNIV OF MINING & TECH
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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 te...

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

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Embodiment Construction

[0045] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0046] A specific embodiment of the present invention discloses a method for designing a coal pillar dam body of an underground coal mine reservoir, and the specific steps are as follows:

[0047] Step 1: Test the physical and mechanical parameters of coal rocks with different water content to obtain the characteristic parameters of coal sample damage evolution under the action of water.

[0048] In the laboratory, the rock universal servo testing machine is used to test the physical and mechanical parameters of coal rock samples with different water content, and the physical and mechanical pr...

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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 ...

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Application Information

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IPC IPC(8): E21F17/103
CPCE21F17/103
Inventor 姚强岭郝琪汤传金李学华杨书懿王伟男
Owner CHINA UNIV OF MINING & TECH
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