摘要
掌握煤矿开采覆岩响应规律及其重要技术参数对矿井安全生产具有重要意义。以建庄煤矿4-2212工作面为研究对象,基于微震监测系统获得的微震事件数量、能量和密度分布特征,对导水裂隙带发育高度和工作面矿压显现规律进行分析研究。研究表明,综合微震事件数量、密度、能量分布特征确定的垮采比为3.8,裂采比为24.8,导水裂隙带会导通洛河组砂岩充水含水层;通过分析4-2212工作面微震事件频次和能量走势,回采期间共经历了19次周期来压,初次来压步距为46.53 m,周期来压步距平均值为22.81 m,确定岩层发生破坏断裂的能量阈值为50028.30 J;将基于微震监测系统研究分析结果与矿井实际生产资料进行对比验证,两者研究成果基本一致,结果表明微震监测系统的监测结果准确可靠。本次研究成果不仅可为类似矿井煤层顶板导水裂隙带发育高度研究提供借鉴,而且为矿井针对性地开展冲击地压防治工作提供了重要依据。
Taking 4-2212 working face of Jianzhuang Coal Mine as the research object,based on the number,energy and density distribution characteristics of microseismic events of microseismic monitoring system,we analyze and study the development height of water-conducting fractured zone and the behavior law of mine pressure in the working face.The study shows that:the ratio of caving and mining determined by the comprehensive microseismic event number,density and energy distribution characteristics is 3.8,the ratio of fracture and mining is 24.8,and the water-conducting fracture zone will be conductive to the aquifers of Luohe group;through the analysis of the microseismic event frequency and energy trend of the 4-2212 working face,the total number of the periodic pressure is 19 during during mining period,initial pressure step is 46.53 m,and the average value of periodic pressure step is 22.81 m,thus the energy threshold for determining the failure and fracture of rock layers is 50028.30 J.The results of our research and analysis of the microseismic monitoring system are compared with the actual production data of the mine,indicating that the two are basically the same,and showing that the monitoring results of the microseismic monitoring system are accurate and reliable.
作者
温军辉
张文
王毅
白宇
杨子凡
陈伟
WEN Junhui;ZHANG Wen;WANG Yi;BAI Yu;YANG Zifan;CHEN Wei(Shaanxi Shanmei Huangling Jianzhuang Mining Co.,Ltd.,Yan’an 727300,China;College of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《陕西煤炭》
2025年第8期1-10,共10页
Shaanxi Coal
基金
国家自然科学基金项目(41807192)。
关键词
建庄煤矿
微震监测
导水裂隙带
初次来压
周期来压
Jianzhuang Coal Mine
microseismic monitoring
water-conducting fractured zone
initial pressure
periodic pressure
