基于可能性指数诊断法的半孤岛工作面冲击危险性评价
Rock Burst Evaluation of Half Isolated Island Face by Probability Index Diagnosis Method
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摘要: 基于煤层应力集中系数和弹性能量指数的可能性指数诊断法具有简单、所需参数少的特点，以葛亭矿正在开采的埋深最大的2323半孤岛工作面为研究对象，采用可能性指数诊断法对该工作面冲击地压危险性进行了评价。通过现场取样和实验室试验获得了煤样的单轴抗压强度和弹性能量指数等参数，采用FLAC3D数值模拟方法计算了2323工作面开采过程中煤层应力集中系数，然后采用可能性指数诊断法对2323工作面冲击危险性进行评价。结果表明，葛亭矿2323工作面具有弱冲击危险性。Abstract: The diagnosis method of probability index based on the stress concentration factor and elastic energy index of coal seam has the characteristics of simple and less required parameters. This method has been used to evaluate the rock burst hazard of the 2323 half island working face which has the maximum burial depth in Geting Coal Mine. The parameters of the uniaxial compressive strength and the elastic energy index of the coal sample were acquired through field sampling and laboratory testing. Meanwhile, the stress concentration factor of 2323 working face during the mining was calculated by FLAC3D software. Then, the rock burst hazard evaluation of the face was done via the above-mentioned diagnosis method. And it was testified by some field tests such as the electromagnetic radiation method and method of drilling bits. The results indicate that the 2323 working face has weak rock burst hazard.
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