Gas extraction influence factor analysis method based on fluid-solid coupling

A technology of gas drainage and influencing factors, which is applied in the field of analysis of influencing factors of gas drainage based on fluid-solid coupling, and can solve problems such as affecting the effect of gas drainage.

Pending Publication Date: 2022-04-15
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

However, other factors such as the gas permeability of coal reservoirs also seriously affect the gas drainage effect.

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  • Gas extraction influence factor analysis method based on fluid-solid coupling
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  • Gas extraction influence factor analysis method based on fluid-solid coupling

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] A method for analyzing factors affecting gas drainage based on fluid-solid coupling, including the following methods:

[0048] Based on the analysis method of gas drainage influencing factors based on fluid-solid coupling, in order to analyze the main controlling factors affecting the gas drainage effect, the following assumptions are made: gas only flows in the coal seam, and the roof and floor of the coal seam are igneous rock walls with ...

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Abstract

The invention discloses a gas extraction influence factor analysis method based on fluid-solid coupling. The method comprises the following steps: firstly, assuming that coal rock is an elastic medium with double porosity and single permeability, wherein the elastic medium is composed of coal matrix pores and fractures; in the gas extraction process, along with reduction of the coal seam gas pressure, adsorbed gas in matrix pores is desorbed into free gas, the free gas is transported into cracks through the diffusion effect and permeates into drill holes through the cracks, a gas extraction model based on fluid-solid coupling is established according to the transportation law of the coal seam gas, and the gas extraction model based on fluid-solid coupling is established by means of comsol multiphysics numerical simulation software. Numerical simulation analysis is carried out in combination with actual conditions of a certain mine working face, and main control factors influencing the gas extraction effect are obtained. According to the analysis method, the gas extraction fluid-solid coupling model is established on the basis of the geological background of a certain mine project in combination with the gas migration rule in the gas extraction process, numerical simulation is conducted on different gas extraction schemes, and a theoretical basis is provided for coal mine gas control.

Description

technical field [0001] The invention relates to the technical field of underground gas drainage, in particular to a method for analyzing influencing factors of gas drainage based on fluid-solid coupling. Background technique [0002] Mine gas drainage is an important means to reduce the gas content in coal seams, reduce the amount of gas gushing out, and prevent gas disasters. However, other factors such as the gas permeability of coal reservoirs also seriously affect the gas drainage effect. [0003] The key to solving this problem is to study the main controlling factors that affect the effect of gas drainage, and make reasonable drainage arrangements for mine gas, so as to reduce the gas content in coal seams, reduce the amount of gas gushing out, prevent gas disasters, and ensure safe production in coal mines , to achieve this goal, there are still many problems to be solved. Contents of the invention [0004] In order to overcome the above-mentioned defects of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q50/02G06F111/04G06F111/10G06F119/08G06F119/14
Inventor 任志成王箫鹤赵浩张镇皓宋高峰
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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