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首页> 外文期刊>Shock and vibration >Study on Rules of Fault Stress Variation Based on Microseismic Monitoring and Numerical Simulation at the Working Face in the Dongjiahe Coal Mine
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Study on Rules of Fault Stress Variation Based on Microseismic Monitoring and Numerical Simulation at the Working Face in the Dongjiahe Coal Mine

机译：东家河煤矿工作面基于微震监测和数值模拟的故障应力变化规则研究

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摘要

Microseismic monitoring technology was used to study the real-time evolution of rock mass damage generated by a working face as it approached a fault in Dongjiahe Coal Mine. The influence of vertical zoning of overlying strata on damage at the fault was analyzed. Numerical simulation using finite element method based on meso-statistical damage theory was used to investigate the nonlinear and nonuniform failure behaviour of the rock mass near the fault. The response of the fault stress to excavation activity and the rule of fault activation were examined. The results show that the fault damage has segmental characteristics. Microcracks are first generated at the fractured zone that is divided into lower, middle, and upper sections, located 30 similar to 70 m, 120 similar to 180 m, and 230 similar to 280 m above the coal seam, respectively. There was also a segmentation phenomenon in the stress response of fault. The risk of fault activation was evaluated by using the ratio of shear stress to the maximum principal stress. When the working face was 260 m and 140 m away from the fault, the activation risk at the upper-middle and lower sections began to increase, respectively. When the fault was within 60 m, the risk of fault activation was highest.
机译：微震监测技术用于研究工作面产生的岩石质量损伤的实时演变，因为它在东郊煤矿接近出故障时。分析了垂直分区覆盖层对故障损伤的影响。基于中统统计损伤理论的有限元法的数值模拟研究了故障附近岩体的非线性和非均匀故障行为。检查了对挖掘活动的响应和故障激活规则。结果表明，故障损坏具有分段特性。首先在裂缝区域中产生微裂纹，该裂缝区分为较低，中间和上部，位于与70m，120类似于180μm的70米和230，分别类似于煤层上方的280μm。故障应激反应也存在分割现象。通过使用剪切应力与最大主应力的比率来评估故障激活的风险。当工作面为260米和140米的故障时，上部和下部的激活风险分别开始增加。当故障在60米以内时，故障激活的风险最高。

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  • 来源
    《Shock and vibration》 |2019年第9期|7042934.1-7042934.12|共12页
  • 作者

    Ma Ke; Yuan Fuzhen; Zhuang Duanyang; Li Quansheng; Wang Zhenwei;

  • 作者单位

    Dalian Univ Technol State Key Lab Coastal & Offshore Engn Dalian 116024 Liaoning Peoples R China|Dalian Univ Technol Inst Rock Instabil & Seism Res Dalian 116024 Liaoning Peoples R China|State Key Lab Water Resource Protect & Utilizat C Beijing 100011 Peoples R China;

    Dalian Univ Technol State Key Lab Coastal & Offshore Engn Dalian 116024 Liaoning Peoples R China|Dalian Univ Technol Inst Rock Instabil & Seism Res Dalian 116024 Liaoning Peoples R China;

    Dalian Univ Technol State Key Lab Coastal & Offshore Engn Dalian 116024 Liaoning Peoples R China|Dalian Univ Technol Inst Rock Instabil & Seism Res Dalian 116024 Liaoning Peoples R China;

    State Key Lab Water Resource Protect & Utilizat C Beijing 100011 Peoples R China;

    North China Univ Technol Sch Civil Engn Beijing 100011 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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