Three-dimensional simulating method for goaf fracture ring morphology

A simulation method and goaf technology, applied in the direction of material inspection, soil material testing, etc., can solve the problem of limited guidance for determining the location of the goaf, difficulty in correctly determining the location of the drill hole, and inability to accurately reflect the goaf Crack shape distribution and other issues
CN105223337AInactive Publication Date: 2016-01-06CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2016-01-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a three-dimensional simulating method for goaf fracture ring morphology. The method comprises the steps that according to the space similarity ratio between a coal seam and overlaying rock and time similarity ratio of coal seam working face propelling, a three-dimensional similar simulation test body is manufactured; according to the site mining working face ground stress situation and the mining sequence, the dynamic process of coal mine working face propelling under the three-dimensional stress condition is simulated; an embedded stress sensor is utilized for monitoring stress changes of a top plate and a bottom plate of a goaf in the mining working face propelling process, and a dynamic resistance strain gauge is utilized for recording data; after mining working face propelling simulation is finished, a tracer agent labeling method is used for carrying out drilling to pry and observe the goaf fracture morphology of the simulation test body, the top plate and the bottom plate of the goaf are separated layer by layer and section by section, and statistics is carried out on fracture data of all layers and all sections; according to the statistical fracture data, three-dimensional software is utilized for drawing a goaf fracture ring morphology simulation image. The method has the advantages that a three-dimensional mode is adopted for simulating the goaf fracture development morphology, and therefore the position of extraction holes can be determined conveniently and accurately.
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Description

technical field

[0001] The invention belongs to the field of gas drainage, in particular to a three-dimensional simulation method for the shape of a fissure circle in a goaf. Background technique

[0002] The source of gas in mine excavation space is mainly the gas gushing out of the working face and goaf and the gas gushing in from adjacent layers. The amount accounts for more than 30-40% of the total gas emission at the working face, and the most is as high as 70-80%. The large amount of gas emission in the goaf often leads to the frequent gas exceeding the limit at the working face, so the production is forced to stop.

[0003] Our country attaches great importance to the study of gas migration laws in goafs, and has gained rich experience in gas drainage technology and drainage techniques in goafs, but there are still some problems, such as the general effect of gas drainage in goafs. Poor, low extraction rate and other issues. The reasons are analyzed because the layo...

Claims

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