A risk assessment method for rock burst in a mining area

A rock burst and dangerous technology, applied in the field of mining engineering, can solve the problems of overlying coal pillars and many small kilns, complex mining relations, shallow rock burst occurrence location, etc.

Active Publication Date: 2019-03-08
CHNA ENERGY INVESTMENT CORP LTD +1
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Problems solved by technology

The rock burst formation conditions in steeply inclined coal seams are different from those in horizontal coal seams or gently inclined coal seams. Rock burst occurs in shallow locations, with many types, complex mining relations, and many overlying coal pillars and small kilns. The existing rock burst risk assessment The method cannot evaluate and distinguish the impact risk in the mining area

Method used

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  • A risk assessment method for rock burst in a mining area
  • A risk assessment method for rock burst in a mining area
  • A risk assessment method for rock burst in a mining area

Examples

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Embodiment 1

[0176] Jiangou Coal Mine +469m horizontal east wing B3-6 working face has a strike length of 1871m, a working face width of 50m, a section height of 24m, a coal seam inclination of 87°, and a buried depth of about 330m. The distance between the rock layer and the coal seam is within 10m, the thickness of the roof is 23m, and the thickness of the floor is 21m. The distance within the Badaowan syncline is 13km to 15km, and the area of ​​798m to 947m in the working face is the overburden residual coal pillar.

[0177] Adopt the risk assessment method of mine area rock burst provided by the present invention, set up a model and carry out the risk assessment of rock burst to this working face, calculate and draw Y in the normal mining area 总 =0.36, it is the risk of weak impact, when the working face enters into the overburden residual coal pillar, Y 总 = 0.64, which is a medium impact risk.

[0178] Through the event analysis of the microseismic monitoring system, the working fac...

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Abstract

The invention discloses a risk assessment method for rock burst in a mining area. The risk assessment method comprises the following steps of S001 collecting geological data of the mining area; S002 determining the rock burst danger level and the rock burst danger index range in advance; S003 determining coal seam mining influence factor parameters, weights and evaluation index value ranges of therock burst; S004 calculating the total rock burst risk comprehensive index Y of the influence factors on the rock burst risk; and S005 comparing the total Y with the rock burst danger index range inthe step S002, and determining the rock burst danger level corresponding to the total Y according to the comparison result. According to the risk assessment method for the rock burst of the mining area, the rock burst risk of each mine and each area of the mining area can be effectively assessed, and the rock burst risk grades of different areas can be distinguished.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a method for evaluating the risk of rock burst in a mining area. Background technique [0002] At present, the development of steeply inclined coal seams in the mining area has reached the level of 400m (surface level of 800m), and experts and scholars have summarized the mechanism of rock burst for near-vertical coal seams, 45° coal seams, and shallow-to-deep mining of steeply inclined coal seams. Grasping the force source and breeding conditions of rock burst, reasonably evaluating the risk of rock burst and dividing the dangerous areas are the prerequisites for taking effective prevention and control measures. The rock burst formation conditions in steeply inclined coal seams are different from those in horizontal coal seams or gently inclined coal seams. Rock burst occurs in shallow locations, with many types, complex mining relations, and many overlying coal pilla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02G06Q10/06
CPCG06Q10/0639G06Q50/02
Inventor 陈建强闫瑞兵王建刘昆轮刘旭东李康赵志鹏曹民远刘永红
Owner CHNA ENERGY INVESTMENT CORP LTD
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