深井上山巷道底板动载诱发冲击矿压控制技术

发布时间：2018-02-16 07:27

本文关键词： 千米深井上山巷道动载矿压矿震底板冲击矿压　出处：《煤炭科学技术》2017年04期 　论文类型：期刊论文

【摘要】：为了防治深井上山巷道底板动载诱发的冲击矿压,采用FLAC~(2D)数值模拟软件及微震监测系统进行控制技术研究,结果表明:静载作用下上山底板水平应力、垂直位移及塑性区深度分别为38.27 MPa、156.38 mm、4 m,动载扰动下底板冲击响应特征分别增加8.96 MPa、266.92 mm、2 m,冲击危险性急剧升高;动力扰动使处于极限条件下的上山煤柱区应力增加打破平衡状态而发生底板冲击矿压,即高静载主导—强动载诱发的动静载叠加诱冲机理;现场微震监测验证了数值模拟结果的合理性;针对深井上山底板冲击矿压特点提出合理布置巷道、采取局部措施、降低动载荷传递、避让法等4种针对性的动力灾害控制措施。
[Abstract]:In order to prevent the impact rock pressure induced by dynamic load on the floor of roadway in deep well, the control technology was studied by using FLACU 2D numerical simulation software and microseismic monitoring system. The results show that the horizontal stress of the bottom plate under static load is obtained. The vertical displacement and the depth of plastic zone are 38.27 MPA ~ 156.38 mm ~ (-1), respectively, and the response characteristics of bottom plate under dynamic load disturbance are increased by 8.96 MPA ~ 266.92 mm ~ (-2) mm, respectively. The dynamic disturbance causes the stress in the upper coal pillar under the limit condition to increase and break the equilibrium state, which results in the rock pressure impact on the floor, that is, the mechanism of static and static superposition induced by high static load and strong dynamic load. Field microseismic monitoring verifies the rationality of numerical simulation results, and puts forward four targeted dynamic disaster control measures, such as reasonable layout of roadway, local measures, reduction of dynamic load transfer and avoidance method, in view of the characteristics of rock pressure impact on the floor of deep well.
【作者单位】：山西汾西矿业(集团)有限责任公司贺西煤矿;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2011CB201200)
【分类号】：TD324

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