煤矿褶皱构造区冲击矿压震源机制

发布时间：2018-03-23 03:24

本文选题：褶皱构造　切入点：冲击矿压　出处：《煤炭学报》2017年01期 　论文类型：期刊论文

【摘要】：为实现对褶皱构造区冲击矿压震源机制的有效分析,基于震源机制矩张量反演方法,在优化震动波远场位移及破裂面产状求解方法的基础上,对甘肃华亭矿区砚北煤矿250204工作面回采期间冲击矿压震源破裂类型、破裂面产状及视应力等地震学参量进行系统分析,揭示了砚北煤矿褶皱构造区冲击矿压震源机制。研究结果表明:工作面回采扰动影响下,褶皱构造区冲击矿压震源破裂类型以拉张破裂为主,其矩张量以非双力偶部分占主导,表现为水平挤压构造应力、超前支承压力共同作用下煤岩体的应力释放;震源破裂面产状有明显分化趋势,小倾角(35°)震源破裂面走向多垂直工作面推进方向,而大倾角(35°)震源破裂面走向多平行于工作面推进方向且倾向实体煤一侧;褶皱构造区冲击矿压震源辐射能量和地震矩基本分布在一包络线内,随震源辐射能量增大,其地震矩大小分布更加集中;通过震源视应力计算,得到了回采扰动下工作面及其周边应力演化情况,与冲击矿压震源时空分布及巷道冲击显现结果基本吻合。
[Abstract]:In order to effectively analyze the focal mechanism of rock burst in folded structural area, based on the inversion method of focal mechanism moment Zhang Liang, the method of solving the far field displacement of seismic wave and the occurrence of fracture surface is optimized. The seismological parameters such as rupture type of shock source, occurrence of fracture surface and apparent stress during mining of 250204 face of Yanbei Coal Mine in Huating Mining area, Gansu Province, are systematically analyzed. In this paper, the mechanism of rock burst source in fold structure area of Yanbei coal mine is revealed. The results show that under the influence of mining disturbance in working face, the fracture type of rock burst source in fold structure area is tension fracture, and the moment Zhang Liang is dominated by non-double couple. The results show that the stress release of coal and rock mass under the combined action of horizontal compressive structural stress and leading bearing pressure, the occurrence of source fracture surface has a distinct differentiation trend, and the small dip angle is 35 掳) the source fracture surface moves in the direction of multiple vertical working faces. However, the strike of the source fracture surface is parallel to the direction of the working face and inclines to the side of the solid coal, and the radiation energy and the seismic moment of the shock source in the fold structural area are basically distributed in an envelope line, and the radiation energy increases with the increase of the source radiation energy. By calculating the apparent stress of the source, the stress evolution of the working face and its surrounding area under the mining disturbance is obtained, which is in good agreement with the space-time distribution of the shock source and the impact behavior of the roadway.
【作者单位】：中国矿业大学矿业工程学院;中国矿业大学深部煤炭资源开采教育部重点实验室;中国矿业大学煤炭资源与安全开采国家重点实验室;
【分类号】：TD324

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