摘要
采用"最佳D值"设计准则对微震台网最佳布设方案进行了理论研究,得出最优台站布置点即为以震源位置为中心的正n边形的顶点;提出了微震台网布设一般性的原则和P波波速测定方法。采用ARAMIS M/E微震监测系统,对千秋煤矿21141工作面围岩破坏和应力分布特征进行了研究,据此划分了冲击地压的3个高危险区域;指出21141工作面开采已经引起了巨厚砾岩的运动,开采过程中容易诱发底板型冲击地压,应采用放炮断底的解危措施;提出21141工作面密闭墙与终采线间距应大于50 m,区段煤柱应小于5 m。
Adopted the ＂best D value＂ design guidelines to account the optimal configuration observation network,the results show that the optimal arrangement of stations located in n vertices of polygon,which is to the source location as the center.Based on theoretical calculations and engineering,proposed the general micro station network layout principles and P wave velocity determination.Based on ARAMIS M/E microseismic monitoring system,researched the characteristic of surrounding rock failure and stress distributed of 21141 workface,and accordingly that divided three high-risk areas;it shows that mining of 21141 workface has caused the thick conglomerate movement,and it leads to the occurrence of bottom-type burst very easy,for this we can blast bottom to reduce risk.And a result is the distance of the closed wall of 21141 workface and coal wall should be more than 50 m,the pillar between workface is less than 5 m.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第2期239-243,共5页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)项目(2010CB226806)
国家"十一五"科技支撑计划项目(2006BAK03B06-01)
关键词
微震监测
围岩破裂
应力分布
定位精度
“最佳D值”设计
microseismic monitoring
surrounding rock failure
stress distributed
positioning accuracy
the ＂best D value＂ design
