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A classification method for mine pressure appearance in working face with hard roof

A technology of hard roof and grading method, applied in mining equipment, mining equipment, earth square drilling and mining, etc., can solve the problems of poor applicability and single consideration factors

Active Publication Date: 2018-01-30
LIAONING TECHNICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, the mine pressure appearance classification methods of hard roof working faces are basically combined with direct roofing and basic roofing. The considerations are single and the applicability is not strong. A scientific and reasonable mine pressure appearance classification method is needed to guide the safety of hard roof working faces. Production

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  • A classification method for mine pressure appearance in working face with hard roof
  • A classification method for mine pressure appearance in working face with hard roof
  • A classification method for mine pressure appearance in working face with hard roof

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] A method for grading mine pressure manifestations in working faces with hard roofs, such as figure 1 shown, including:

[0032] Step 1. Determine the judging factor set U=(u 1 , u 2 , u 3 , u 4 , u 5 , u 6 , u 7 ), to obtain the value of each evaluation factor;

[0033] According to the degree of difficulty of the roof collapse, the cushioning effect of the direct roof, the size of the mining space and other factors, the determination of the evaluation factors includes: the initial pressure step distance u 1 , basic top thickness u 2 , mining thick u 3 , Ratio u of mining thickness to immediate roof thickness 4 , The proportion of hard rock formations within 100m of the coal seam roof u 5 , buried depth u 6 , working face length u 7 . At the same time, according to the geological survey, exploration results...

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Abstract

The present invention provides a method for grading mine pressure appearance in a hard roof working face, comprising: determining a set of evaluation factors for grading mine pressure appearance in a hard roof working face, and obtaining the values ​​of each evaluation factor; determining the evaluation set for grading the appearance of rock pressure in a hard roof working face , that is, the set of evaluation grades for rock pressure appearance on hard roof working faces; establish the fuzzy relationship between each factor in the evaluation factor set and the evaluation grades in the evaluation set, and obtain a fuzzy relationship matrix; The weight set of each factor is obtained to obtain the weight vector of each factor; the fuzzy relationship matrix and weight vector are synthesized and calculated, and the mine pressure appearance of the hard roof working face is classified. According to the mechanical properties and occurrence conditions of the hard roof, the present invention classifies the strength of the mine pressure on the working face, realizes the effective prediction of the strength of the mine pressure on the working face under the condition of the hard roof, and can take targeted support for the working face and the mining roadway scheme to realize safe mining at the working face.

Description

technical field [0001] The invention belongs to the technical field of mine pressure appearance classification, in particular to a mine pressure appearance classification method on a hard roof working face. Background technique [0002] The hard roof refers to the thick, hard and stable conglomerate, limestone, sandstone and other rock formations that exist above or directly on the top of the coal seam. developmental characteristics. After the coal seam is mined, the hard roof can be exposed in a large area and is not easy to fall naturally. Once it falls, the area of ​​a single collapse is large, and the support pressure and roof pressure are also continuously increasing, accompanied by dynamic phenomena such as strong periodic pressure. , It is easy to cause damage to the support equipment, and even accidents such as casualties. The occurrence conditions of coal seams in my country are very complicated. The coal seams belonging to the hard roof account for about 1 / 3, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00
CPCE21F17/00
Inventor 朱志洁陈蓥韩军张宏伟李胜宋卫华汤国水霍丙杰兰天伟
Owner LIAONING TECHNICAL UNIVERSITY
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