地垒构造区域内工作面矿震发生规律研究

发布时间：2018-02-10 17:24

本文关键词： 地垒断层矿震剪切梁微震监测矿震特征　出处：《煤炭科学技术》2017年06期 　论文类型：期刊论文

【摘要】：为深刻揭示和总结地垒构造区矿震规律的特殊性,以东滩煤矿1305工作面为研究对象,采用力学计算、数值模拟和微震监测相结合的方法,分析地垒构造区垂直应力二次分布,微震信号反映出矿震的影响。结果表明:工作面开采距离EF93断层距离84 m和35 m时,EF93断层和EF32断层相继发生错动,容易诱发矿震;微震监测和数值模拟叠加结果显示出震源在工作面前方和采空区后方积聚,且主要集中在顶板硬岩和应力升高区,开采距离EF93断层80 m时,断层错动诱发高能矿震,验证了力学计算结果;地垒构造区开采震动能量和频次都升高,断层活化是影响震动增强的主因;地震活性系数b值与震动能量呈负相关性,大震发生之前往往经历"小震密集-平静-大震发生"的过程。
[Abstract]:In order to reveal and summarize the particularity of the ore earthquake law in the barrier tectonic area, taking the 1305 face of Dongtan Coal Mine as the research object, the secondary distribution of vertical stress in the barrier tectonic area is analyzed by using the method of mechanical calculation, numerical simulation and microseismic monitoring. The results show that the fault of EF93 and the fault of EF32 occur one after another when the distance between mining face and EF93 fault is 84 m and 35 m, which is easy to induce mine earthquake. The results of microseismic monitoring and numerical simulation show that the seismic source accumulates in front of the face and behind the goaf, and it is mainly concentrated in the roof hard rock and stress rising area. When the mining distance is 80 m from the EF93 fault, the dislocation of the fault induces the high-energy mine earthquake. The results of mechanical calculation are verified. The seismic energy and frequency of mining in the barrier tectonic area are increased, and the activation of fault is the main factor affecting the vibration enhancement. The seismic activity coefficient b is negatively correlated with the vibration energy. Large earthquakes often go through the process of "small earthquake denseness-calmness-large earthquake occurrence" before the occurrence of large earthquakes.
【作者单位】：辽宁工程技术大学矿业学院;大唐呼伦贝尔能源开发有限公司顺兴煤矿;
【基金】：国家自然科学基金资助项目(51304110)
【分类号】：TD325

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