深部开采过向斜微震时空演化规律研究  

Study on temporal and spatial evolution law of microseism in deep mining passing through syncline

作　　者：周金艳 杨波 Zhou Jinyan;Yang Bo(Hebei Coal Research Institute Co.,Ltd.,Xingtai 054000,China;Key Laboratory of Mine Water Disaster Detection and Prevention and Control,National Mine Safety Administration,Xingtai 054000,China;Hebei Key Laboratory of Mine Microseismicity,Xingtai 054000,China)

机构地区：[1]河北煤炭科学研究院有限公司,河北邢台054000 [2]矿井水害探测与防控国家矿山安全监察局重点实验室,河北邢台054000 [3]河北省矿井微震重点实验室,河北邢台054000

出　　处：《煤炭与化工》2025年第4期1-6,13,共7页Coal and Chemical Industry

基　　金：冀中能源集团科技创新项目(2024JZ079)。

摘　　要：深部开采条件下,煤矿赋存条件复杂,当存在向斜、背斜、断层等构造时,防治水工作难度呈非线性增大。为深入分析深部开采构造影响,以九龙矿15249N工作面为工程背景,分别从微震平面分布、垂向延伸、能量密度等多参量对过向斜阶段进行研究。研究结果表明:微震技术可有效捕捉在构造区煤岩体破裂信号,事件频次、平面分布、垂向发育受向斜构造影响明显,因而在工作面不同回采阶段,由于地质条件的变化而呈现不同的特点;在靠近向斜轴位置时,顶板事件占比增大,向斜轴部上覆围岩破裂变形程度大。采线附近事件在向斜两翼分布较多,在轴部底板事件少,积聚的能量小;从底板事件分布上看,与正常无构造区不同,呈现出“单峰偏态式”分布,基于微震监测的底板破坏深度为42 m,比无构造区增大约50%,可见构造区域为底板防治水重点关注区域。Under the condition of deep mining,the occurrence conditions of coal mines are complex.When there are synclines,anticlines,faults and other structures,the difficulty of water prevention and control increases nonlinearly.In order to deeply analyzed the influence of structure under deep mining,taking the No.15249N Face of Jiulong Mine as the engineering background,the passing through syncline stage was studied from the aspects of microseismic plane distribution,vertical extension,energy density and other parameters.The results showed that the microseismic technology could effectively capture the fracture signal of coal and rock mass in the structural area.The event frequency,plane distribution and vertical development were obviously affected by the syncline structure.Therefore,in different mining stages of the working face,different characteristics were presented due to the change of geological conditions.When it was close to the syncline axis,the proportion of roof events increased,and the degree of fracture deformation of the overlying surrounding rock at the syncline axis was large.The events near the mining line were more distributed in the two wings of the syncline,and the events in the shaft floor were less,and the accumulated energy was small;from the distribution of floor events,it showed a'unimodal skewed'distribution,which was different from the normal non-structural area.The floor failure depth based on microseism monitoring was 42 m,which was about 50%larger than that of the non-structural area.It could be concluded that the structural area was the key area for floor water prevention and control.

关 键 词：深部开采 向斜 微震 能量 底板破坏深度 

分 类 号：TD74[矿业工程—矿井通风与安全]