摘要
煤层底板突水是危害矿井安全的一个重要灾害问题之一,为了煤矿的安全生产,现利用微震监测技术进行煤矿底板突水预测,为其提供较精准的预测信息,以九龙矿15449S工作面开采过程为背景,运用微震监测技术对九龙矿15449S工作面底板进行了监测。监测结果表明:九龙矿15449S工作面底板的整体趋于稳定,微震事件主要分布在了工作面隐性裂隙带区域、水仓施工扰动区域、深部奥灰事件区域、突水预警区域、奥灰径流带区域5个区域。其中隐性裂隙带的存在,导致工作面涌水量不断升高,对回采工作造成了困难;深部奥灰事件反映了地下水流场的变化,为突水预警提供了依据,且在其他工作面突水前的14 d内,在微震监测区域已经监测到异常;发现异常区域与奥灰径流带导通,并在工作面逐渐逼近的过程中趋于活跃,极有可能使隐伏构造活化为导水通道,应作为重点防治水地段。该成果可为九龙矿安全开采提供技术支撑。
Coal seam floor water inrush is one of the important disaster problems that endanger the safety of coal mine.In order to ensure the safety of coal mine production,microseismic monitoring technology is used to forecast the water inrush of coal mine floor to provide more accurate prediction information.Taking the mining process of 15449S working face of Jiulong mine as the background,microseismic monitoring technology is used to monitor the 15449S working face floor of Jiulong mine.The monitoring results show that the whole floor of the 15449S working face of Jiulong mine tends to be stable,and the microseismic events are mainly distributed in 5 areas,including the recessive fissure zone of the working face,the disturbance area of water silo construction,the deep Ordovician limestone event area,the early warning area of water inrush and the Ordovician limestone runoff zone.The existence of recessive fracture zone leads to increasing water inflow in working face,which makes it difficult to stope work.The deep Ordovician limestone event reflected the change of groundwater flow field and provided a basis for water inrush warning.In addition,anomalies had been detected in the microseismic monitoring area in the 14 days before water inrush on other working faces.It is found that the abnormal area is connected with the Ordovician limestone runoff zone,and tends to be active in the process of approaching the working face,which is very likely to activate the buried structure as a water channel,and should be taken as the key water control area.The results can provide technical support for safe mining in Jiulong mine.
作者
刘林林
卢兰萍
靳子栋
解振伟
卫皓皓
李大屯
LIU Linlin;LU Lanping;JIN Zidong;XIE Zhenwei;WEI Haohao;LI Datun(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Fengfeng Group,Jizhong Energy Group,Handan 056038,China;Jiulong Mine,Handan Baofeng Co.,Ltd.,Fengfeng 056200,China)
出处
《煤炭技术》
CAS
2024年第3期219-224,共6页
Coal Technology
基金
国家自然科学基金青年科学基金项目(41902254)
河北省自然科学基金生态智慧矿山联合基金项目(D2020402013)。
关键词
微震监测
突水预测
底板突水
微震事件
突水预警
microseismic monitoring
water inrush prediction
floor water inrush
microseismic event
water inrush warning
