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主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
临空巷道冲击地压耦合致灾因素及时空演化过程研究
  • Title

    Study on disaster-causing factors and evolution process of rock burst in roadway near gob

  • 作者

    李康陈建强赵志鹏闫瑞兵杜涛涛

  • Author

    LI Kang,CHEN Jianqiang,ZHAO Zhipeng,YAN Ruibing,DU Taotao

  • 单位

    神华新疆能源有限责任公司天地科技股份有限公司 开采设计事业部煤炭科学研究总院 开采研究分院

  • Organization
    (1.Shenhua Xinjiang Energy Co.,Ltd.,Urumqi ,China;2.Coal Mining and Design Department,Tiandi Science & Technology Co.,Ltd.,Beijing ,China;3.Coal Mining Research Branch,China Coal Research Institute,Beijing ,China)
  • 摘要

    为了研究I010203工作面临空巷道多次矿震诱发冲击显现的原因及规律,采用ARAMIS M/E微震监测系统、PASAT-M便携式微震监测系统和冲击地压应力监测系统进行实时监测,通过地质因素和开采因素分析确定了6个影响因素,进一步根据煤体应力监测数据、支架压力监测数据、微震监测数据,分析了I010203工作面回采过程煤体应力的集中程度、演化过程,研究了工作面周期来压期间、断层区域、侧向顶板的微震活动演化过程,针对回采期间发生的一次矿震引起的弱冲击显现案例,利用PASAT-M便携式微震监测系统对弱冲击显现区域进行了探测,依据综合监测分析结果探讨了煤体应力、围岩活动的相互关系及致灾过程,确定了I010203工作面临空巷道矿震诱发冲击显现的原因及规律。结果表明:I010203工作面临空巷道煤体应力集中程度高,实体侧达到2.05~8.59、煤柱侧达到1.76~3.16,采动与构造应力叠加后形成的高静载接近或达到煤体冲击地压发生的临界应力,断层、侧向顶板结构以及顶板周期破断是影响矿震发生的主要因素,高集中程度的静载荷为冲击致灾提供易满足的应力条件,工作面来压期间,断层、侧向顶板结构的能量突然释放,诱发大能量矿震发生,以动载形式至采场空间,使接近或临界应力条件的煤体进一步升高,达到冲击地压发生的临界条件,从而诱发冲击显现。

  • Abstract
    In order to study the causes and laws of the multiple mine earthquake induced shocks in the gob area of I010203, the ARAMIS M/E microseismic monitoring system, PASAT-M portable seismic monitoring system and impact ground pressure stress monitoring system are used for real-time monitoring, through the analysis of geological and mining factors, the six influencing factors were determined. According to the coal stress monitoring data, the monitoring data of the support pressure and the microseismic monitoring data, the concentration and evolution process of the coal body stress during the mining process of I010203 working face were analyzed and the working surface cycle was studied. The evolution process of microseismic activity during the period of working face cycle, fault zone and lateral roof was studied, and the weak shock caused by a mine shock occurred during the mining period was also analyzed. In the case study, the PASAT-M portable microseismic monitoring system was used to detect the weak impact area. According to the results of comprehensive monitoring and analysis, the relationship between coal body stress and surrounding rock activities and the disaster-causing process were discussed. The causes and laws of mine-induced earthquake induced impact of I010203 working face were determined. The results show that I010203 working area faces high stress concentration in the gob, the physical side reaches 2.05~8.59, and the coal pillar side reaches 1.76~3.16. The high static load formed by the superposition of mining and tectonic stress is close to or reaches the impact pressure of coal body. Critical stress, fault, lateral roof structure and roof cycle breaking are the main factors affecting the occurrence of mining earthquakes. The static load with high concentration provides easy-to-satisfy stress conditions for impact disasters, working face pressure, fault, lateral roof structure. The sudden release of energy of structure induces occurrence of large-energy mine earthquakes, and the dynamic load form is transferred to stope space, so that the coal body near the critical or critical stress condition is further raised to the critical condition where the rock burst pressure occurs, thereby inducing the impact.
  • 关键词

    矿震冲击地压静-动载致灾因素

  • KeyWords

    mine earthquake; rock burst pressure; static-dynamic load; disaster-causing factors

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    • 工作面震源及显现位置

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