大埋深工作面微震活动规律研究
Study on microseismic activity law of large buried depth working face
杨波1
作者信息
- 1. 河北煤炭科学研究院有限公司,河北邢台 054000;河北省矿井微震重点实验室,河北邢台 054000
- 折叠
摘要
为了避免矿井突水的发生,实现工作面安全回采,本文以冀中能源股份有限公司邢东矿12210工作面为研究对象,通过在工作面建立微震监测系统,利用高精度微震监测技术对12210工作面进行实时、动态、连续监测.结果表明,微震事件主要集中在回采工作面内及工作面周围的断层附近;顶板微震事件主要集中在0～39.50m,底板微震事件主要集中在煤层以下31m范围内;过断层探巷时,微震活动响应明显;断层影响下的回采扰动对底板扰动深度最大值有显著影响;回采速度与微震事件总数、顶板事件数、底板事件数呈极显著正相关,与底板扰动深度最大值呈极显著负相关,相关系数分别为0.568、0.547、0.568、-0.376.
Abstract
In order to avoid the occurrence of mine water outburst and realize the safe mining of working face,this paper took No.12210 Face of Xingdong Mine of Jizhong Energy Co.,Ltd.as the research object.Through the establishment of microseismic monitoring system in the working face,No.12210 Face was monitored in real time,dynamically and continuously by using high-precision microseismic monitoring technology.The results showed that the microseismic events were mainly concentrated in the working face and near the faults around the working face.The roof microseismic events were mainly concentrated in the range of 0～39.50 m,and the floor microseismic events were mainly concentrated in the range of 31 m below the coal seam.When passing through the fault exploration roadway,the microseismic activity response was obvious;the mining disturbance under the influence of fault had a significant influence on the maximum depth of floor disturbance.The mining speed was significantly positively correlated with the total number of microseismic events,the number of roof events,and the number of floor events.And the mining speed was significantly negatively correlated with the maximum floor disturbance depth.The correlation coefficients were 0.568,0.547,0.568,and-0.376,respectively.
关键词
突水/微震监测/断层/回采速度Key words
water outburst/microseismic monitoring/fault/mining speed引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据