摘要
在冲击地压发生后,附近区域煤岩体内的应力重新分布,在应力重新分布的过程中仍有发生二次冲击地压的风险。针对冲击地压发生后现场危险性的实时评价难题,采用实验室岩石单轴压缩实验和现场实测,分析研究了岩石试件破坏后声发射现象变化规律和冲击地压发生后地音活动规律,依据分析结果提出了采用MK趋势预警法的Z值作为冲击地压发生后危险性实时评价指标:当Z值大于0时,表明现场仍具有二次冲击地压的风险,当Z值降低至0时则表明本次冲击地压结束。通过在胡家河煤矿和孟村煤矿的应用,结果表明,Z值的变化规律能够反应冲击地压现场危险程度的变化规律,进而确定冲击地压影响结束的时间。
After the rock burst occurs,the stress in the coal rock mass near the rock burst area is redistributed,and there is still a risk of secondary rock burst during the process of stress redistribution.Aiming at the difficulty of risk evaluation in the rock burst site in real time after the rock burst,the change law of acoustic emission phenomenon after the failure of the rock specimen and the rule of rock sound activity after the rock burst were analyzed by using the laboratory uniaxial compression experiment and field measurement methods,and the Z-value of Mann-Kendall(MK)trend warning method was proposed as the real-time evaluation index of the risk after the rock burst according to the analysis results:when the Z value was greater than 0,it indicated that there was still a risk of a second rock burst,and when the Z value was reduced to 0,it indicated that the risk was eliminated.The application results in Hujiahe Coal Mine and Mengcun Coal Mine showed that the change law of Z value could reflect the change law of the risk degree of rock burst site,and then determine the end time of the impact of rock burst.
作者
李岩
王伟
顾颖诗
吴震
沈家宇
LI Yan;WANG Wei;GU Yingshi;WU Zhen;SHEN Jiayu(CCTEG Coal Mining Research Institute,Chaoyang,Beijing 100013,China;Coal Mining Research Branch of China Coal Research Institute,Chaoyang,Beijing 100013,China;Inner Mongolia Haosheng Coal Industry Co.,Ltd.,Ordos,Inner Mongolia 017000,China)
出处
《中国煤炭》
2023年第12期61-65,共5页
China Coal
关键词
冲击地压
地音监测
MK趋势
危险性评价
煤矿安全
rock burst
ground sound monitoring
MK trend
risk evaluation
coal mine safety
作者简介
李岩(1988-),男,河南济源人,硕士,助理研究员,主要从事冲击地压微震、地音监测预警技术研究工作。E-mail:18210113845@139.com。
