煤矿采场覆岩破坏的微地震监测预报研究
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摘要
微地震现象是岩体破坏失稳发生前给出的重要信息,研究岩体变形破坏过程的微地震特征对于预报岩体破坏、保证矿山安全生产具有重要意义。采用山东科技大学自主研制的煤矿井下微震监测系统对华丰煤矿采场覆岩破坏过程进行了监测。通过对监测到的微地震事件定位计算,证实微地震发展演化与采场覆岩破坏密切相关。根据未失稳岩体微震事件频数、能量、距离的差分变化规律,能够较准确地提前预报岩体破坏,对于采用微地震监测技术解决煤矿井下岩体破坏预报具有重要指导意义。
Micro seismic phenomenon is an important information before fracturing of rock mass;studies of micro seismic characteristics of the fracturing process of rock mass are of important significance for prediction of fracturing and destabilizing of rock mass and guaranteeing the safety of mine production.The coal mine underground micro seismic monitoring system which is made by Shandong University of Science and Technology is used to monitor the behavior of overburden strata of mining face.The close relationship between evolvement of micro seismic and fracturing of the overburden strata is proved by location of the monitored micro seismic events.The fracturing of rock mass can be precisely predicted according to the change law of finite difference of frequency,energy and distance of micro seismic events.This is of important instructing significance for prediction of rupture and instability of the rock mass underground coal mine by micro seismic monitor technology.
Micro seismic phenomenon is an important information before fracturing of rock mass;studies of micro seismic characteristics of the fracturing process of rock mass are of important significance for prediction of fracturing and destabilizing of rock mass and guaranteeing the safety of mine production.The coal mine underground micro seismic monitoring system which is made by Shandong University of Science and Technology is used to monitor the behavior of overburden strata of mining face.The close relationship between evolvement of micro seismic and fracturing of the overburden strata is proved by location of the monitored micro seismic events.The fracturing of rock mass can be precisely predicted according to the change law of finite difference of frequency,energy and distance of micro seismic events.This is of important instructing significance for prediction of rupture and instability of the rock mass underground coal mine by micro seismic monitor technology.
引文
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[2]张兴民,于克君,席京德,等.微地震技术在煤矿两带监测领域的研究与应用[J].煤炭学报,2000,25(6):566-570.ZHANG Xing-min,YU Ke-jun,XI Jing-de,et al.The research and application of micro seismic technology in mine fractured and caving zones monitoring[J].Journal of China Coal Society,2000,25(6):566-570.
[3]骆循,姜福兴.岩体破裂微动监测在矿山灾害治理中的新进展[A].中国科协第四届青年学术年会文集[C].北京:中国科学技术出版社,2001.194-195.
[4]杨永杰,姜福兴,柏正才,等.综放面全锚网巷道围岩变形规律[J].矿山压力与顶板管理,2001,(2):29-31.YANG Yong-jie,JIANG Fu-xing,BAI Zheng-cai,et al.Analysis of deformation law around roadway driving along next goaf by bolting with mesh in fully-mechanized top-coal caving face[J].Ground Pressure and Strata Control,2001(2):29-31.
[5]逄焕东.岩体微地震的模式、定位及其失稳预报研究[D].山东泰安:山东科技大学,2004.64-65.
[6]宋振骐.实用矿山压力控制[M].徐州:中国矿业大学出版社,1998.
[7]逄焕东,姜福兴,张兴民.数学实验揭示的岩体声发射参数变化[J].防灾减灾工程学报,2004,24(2):158-161.PANG Huan-dong,JIANG Fu-xing,ZHANG Xing-min.Parameter variation of rock mass′acoustic emission revealed by mathematical experiment[J].Journal of Disaster Prevention and Mitigation Engineering,2004,24(2):158-161.
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