基于微震监测的高强度开采工作面煤岩破坏规律研究  

Study on the Failure Law of Coal Rock in High-intensity Working Face based on Microseismic Monitoring

作　　者：郭辉 王新萍[2] 芦盛亮 李振波 卢国菊 GUO Hui;WANG Xinping;LU Shengliang;LI Zhenbo;LU Guoju(Shanxi Institute of Energy,Taiyuan,Shanxi 030006,China;Shanxi Polytechnic College,Taiyuan,Shanxi 030006,China;Yuwu Coal Mine,Luan Huanneng Corporation,Changzhi,Shanxi 046103,China)

机构地区：[1]山西能源学院,山西太原030006 [2]山西职业技术学院,山西太原030006 [3]潞安环能股份公司余吾煤业公司,山西长治市046103

出　　处：《矿业研究与开发》2018年第12期52-56,共5页Mining Research and Development

基　　金：国家自然科学基金项目(51404167);山西省自然科学基金项目(201701D22111244;2014011035-2)

摘　　要：高强度开采工作面煤岩破坏规律是采场支架与围岩关系研究的关键。以山西潞安集团余吾煤业S2205高强度开采工作面为工程背景,利用微震监测技术并结合传统矿压实测技术,对工作面煤岩破坏规律进行实测分析。研究结果表明:利用微震事件频次和能量分布可判断顶底板岩层的破坏范围;微震事件的发生和工作面的推进度有关,当推进度达到一定程度、突然发生大变化、停产后复产时,微震事件会急剧增多,应该保持稳定合理的推进速度;微震事件周期性地超前于周期来压,具体表现为能量和频次的周期性变化,可以依此预测工作面周期来压;高强度开采工作面煤岩破裂会产生微震事件,事件的频次和能量能反映煤岩破裂程度,事件发生的位置即为超前支承压力影响峰值区域。研究结果可为类似条件下高强度开采工作面的设备选型、工艺选择确定提供理论依据和工程参考。The failure law of coal rock in high-intensity working face is the key to study the relationship between stope support and surrounding rocks.Taking the S2205 high-intensity working face of Yuwu Coal mine as the engineering background,the failure law of coal rock in the working face was measured and analyzed by microseismic monitoring technology and traditional compaction measurement technology.The results were concluded as follows.Firstly,the failure range of roof and floor strata could be judged by the frequency and energy distribution of microseismic events.Secondly,the occurrence of microseismic events was related to the advance degree of working face.When the advance degree reached a certain value,great change suddenly occurred,or production was resumed after shutdown,the microseismic events would increase sharply.So,the stable and reasonable advance speed should be maintained.Thirdly,microseismic events were ahead of the periodic weighting periodically,which was manifested in the periodic variation of energy and frequency.Based on this,the periodic weighting of working face could be predicted.Finally,microseismic events would be produced by coal rock failure of high-intensity working face.And the frequency and energy of the events could reflect the failure degree of coal rock.The location of the events was the peak area affected by the advance abutment pressure.The research results could provide a theoretical basis and engineering reference for equipment selection and technology selection of high-intensity working face under similar conditions.

关 键 词：微震监测 高强度开采工作面 煤岩破坏 矿压显现 

分 类 号：TD325.4[矿业工程—矿井建设]