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Whole-process numerical simulation method for working face mining on the basis of goaf compaction effect

A numerical simulation, working face technology, applied in data processing applications, electrical digital data processing, special data processing applications, etc.

Inactive Publication Date: 2018-11-06
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, the results calculated by the current numerical model are quite different from the reality

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  • Whole-process numerical simulation method for working face mining on the basis of goaf compaction effect
  • Whole-process numerical simulation method for working face mining on the basis of goaf compaction effect
  • Whole-process numerical simulation method for working face mining on the basis of goaf compaction effect

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0057] Such as figure 1 As shown, a numerical simulation method for the whole mining process of the working face based on the compaction effect of the goaf includes the following steps:

[0058] (1) Collect relevant geological information of the working face to be evaluated.

[0059] The relevant geological information includes: the lithology of the rock formation, the physical and mechanical properties of the coal rock mass, the buried depth of the working face, the length of the working face and the original rock stress field (the ratio of the horizontal stress to the vertical stress); the coal rock mass Physical and mechanical properties include thickness of coal and rock mass, elastic modu...

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Abstract

The invention discloses a whole-process numerical simulation method for working face mining on the basis of a goaf compaction effect. The method comprises the following steps that: (1) collecting therelevant geological information of a working face to be evaluated; (2) establishing a numerical calculation model; (3) determining the initial weighting (1p) and the periodic weighting step (1s) of the working face; (4) determining the range of a caving zone and a fissure zone above the working face, and positioning a caving zone unit body as an empty model; (5) judging whether the goaf is completely filled or not; (6) changing the caving zone unit body into a double-yield model from the empty model, and meanwhile, weakening the material attribute of a rock mass in the fissure zone; and (7) repeatedly executing the above process until the working face finishes being mined. By use of the numerical simulation method, a long wall mining process can be favorably simulated, a strata behaviors rule is disclosed, and a theoretical basis and construction guidance are provided for disaster prevention and control.

Description

technical field [0001] The invention relates to a numerical simulation method for the whole mining process of a working face, in particular to a numerical simulation method based on the gob compaction effect which is applicable to the mining process of an underground longwall working face in a coal mine and which affects the appearance of mine pressure. Background technique [0002] With the continuous increase of the depth and difficulty of coal mining in my country, engineering disasters such as impact mine pressure, coal and gas outburst, and strong mine pressure caused by mining are becoming more and more severe, which seriously restricts the safe and efficient production of mines. Therefore, it is of great theoretical and practical significance to study the appearance law of mine pressure in the stope and provide theoretical basis and on-site guidance for disaster prevention and control. [0003] Research shows that the occurrence of rock burst is mainly related to the ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/02
CPCG06Q50/02G06F30/20G06F2119/06
Inventor 朱广安
Owner XIAN UNIV OF SCI & TECH
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