Mining pressure relief boundary space-time curve cluster determination method

A technology for determining methods and curve clusters, applied in the field of safety engineering, can solve problems such as inaccurate pressure relief boundaries, and achieve the effect of eliminating prominent dangers

Pending Publication Date: 2021-12-03
CHONGQING UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining the space-time curve cluster of mining pressure relief boundary to solve the problem that the existing pressure relief boundary is not accurate

Method used

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  • Mining pressure relief boundary space-time curve cluster determination method
  • Mining pressure relief boundary space-time curve cluster determination method

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Embodiment 1

[0040] refer to Figure 1-2 As shown, the present invention proposes a method for determining the space-time curve cluster of the mining pressure relief boundary, selects a specific mine as the research object, collects relevant mining area geology and mining data, determines the evolution characteristics of the stress boundary at the pressure relief position, and substitutes it into the disturbance damage flow of the assembly In the variable mechanics model, the pressure relief boundary curve under specific mining conditions at a specific time is obtained.

[0041] Specifically include the following steps:

[0042] S1. Constructing a three-dimensional numerical calculation model of the working face, and performing mining calculations through the three-dimensional numerical calculation model to obtain the initial stress distribution of the overlying rock;

[0043] Based on the geological conditions of the actual working face, establish a three-dimensional numerical calculatio...

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Abstract

The invention discloses a mining pressure relief boundary space-time curve cluster determination method. The method specifically comprises the following steps: calculating a three-dimensional numerical model, deducing a constitutive relation of a block-scattered combination, determining a space-time evolution process of a stress boundary of a mining-induced pressure relief position, and drawing the space-time curve cluster of the pressure relief boundary. According to the invention, the influence of time and space factors on the pressure relief boundary is fully considered, the authenticity and objectivity of the mining pressure relief boundary can be guaranteed, the more accurate mining pressure relief boundary can be obtained, and the method has important significance for determining the outburst elimination range of the protected layer.

Description

technical field [0001] The invention relates to the technical field of safety engineering, in particular to a method for determining the space-time curve cluster of mining pressure relief boundary. Background technique [0002] In the process of coal mining, gas disaster is still one of the main disasters in coal mines. It is very easy to cause mass death and injury, and has a great social impact. Coal and gas outburst is one of the typical gas disasters. As coal mining advances deeper, The in-situ stress and gas pressure of the coal seam increase significantly, the permeability gradually decreases, the rheological characteristics of the rock mass become more obvious, and coal and gas outburst are more likely to occur. Pressure relief mining is the most effective and economical method to prevent and control coal and gas outburst. Accurate determination of pressure relief boundary is crucial to determine the pressure relief range of adjacent coal seams. At present, the deter...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14Y02T90/00
Inventor 邹全乐郑皓泷张碧川梁运培冉启灿夏晓峰洪扬丁令奇
Owner CHONGQING UNIV
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