摘要
本研究旨在探讨采动速度对煤矿开采过程中岩层应力调整和破裂行为的影响,尤其是在高承压水环境下对矿井安全生产的潜在影响,以东庞矿西庞井9303工作面为研究对象,基于微震监测数据,分析了采动速度对微震事件频次、顶板破裂高度及底板扰动深度的影响规律。结果表明,随着采动速度由1.3 m/d增至3.1 m/d,微震事件总数、顶板事件数和底板事件数分别增加41.67%、60%和33.33%,顶板破裂高度由41.35 m增至58.75 m,增幅达42.1%;底板扰动深度变化较小,呈现微弱变浅趋势,由16.21 m减至15.62 m,整体变浅幅度为3.64%。结果表明,采动速度与顶板破裂高度及微震事件频次显著相关,与底板扰动深度相关性较弱,即采动速度对顶板和底板破裂行为具有差异化影响,为矿井水害防治提供了科学依据。
The purpose of this study was to explore the influence of mining speed on the stress adjustment and fracture behavior of rock strata during coal mining,especially the potential impact on mine safety production in high confined water environment.Taking No.9303 Face of Xipang Well in Dongpang Coal Mine as the research object,based on the microseism monitoring data,the influence of mining speed on the frequency of microseism events,the height of roof fracture and the depth of floor disturbance was analyzed.The results showed that with the increase of mining speed from 1.3 m/d to 3.1 m/d,the total number of microseism events,the number of roof events and the number of floor events increased by 41.67%,60%and 33.33%respectively,and the height of roof fracture increased from 41.35 m to 58.75 m,with an increase of 42.1%.The disturbance depth of the bottom plate changed slightly,showing a slight shallowing trend,from 16.21 m to 15.62 m,and the overall shallowing range was 3.64%.The results showed that the mining speed was significantly correlated with the roof rupture height and the frequency of microseism events,and the correlation with the floor disturbance depth was weak,which meant the mining speed had a differential effect on the roof and floor rupture behavior.The study provided a scientific basis for mine water disaster prevention and control.
作者
杨惠惠
杨波
杜龙龙
Yang Huihui;Yang Bo;Dulonglong(Hebei Coal Research Institute Co.,Ltd.,Xingtai 054000,China;Hebei Key Laboratory of Mine Microseismicity,Xingtai 054000,China)
出处
《煤炭与化工》
2025年第6期1-5,35,共6页
Coal and Chemical Industry
关键词
采动速度
微震监测
顶板破裂高度
底板扰动深度
mining speed
microseism monitoring
roof fracture height
floor disturbance depth
