巨厚砂岩下采动覆岩裂隙场及微震时空演化规律研究  

Fissure field and microseismic spatiotemporal evolution patterns in mining overburden under giant thick sandstone

作　　者：谭毅[1,2,3] 张少普 何满潮 郭文兵 丁国利[4] 王宇 程浩 李辉 TAN Yi;ZHANG Shaopu;HE Manchao;GUO Wenbing;DING Guoli;WANG Yu;CHENG Hao;LI Hui(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454000,China;Henan Provincial Collaborative Innovation Center for Coal Safety Production,Jiaozuo Henan 454000,China;School of Earth Sciences and Engineering,Hehai University,Nanjing Jiangsu 210098,China;Zhongtian Hechuang Energy Co.,Ltd.,Ordos Inner Mongolia 017316,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]煤炭安全生产河南省协同创新中心,河南焦作454000 [3]河海大学地球科学与工程学院,江苏南京210098 [4]中天合创能源有限责任公司,内蒙古鄂尔多斯017316

出　　处：《矿业科学学报》2025年第1期70-85,共16页Journal of Mining Science and Technology

基　　金：国家自然科学基金(52322403,52174108,51974105);河南省优秀青年科学基金(222300420045)。

摘　　要：采动覆岩裂隙演化高度及分布形态是顶板水害防治重要参数之一。以内蒙古某矿3105工作面为工程背景,基于数值模拟、分形几何理论及微震事件三维空间分析明晰采动覆岩裂隙场及微震时空演化规律。结果如下:(1)采动覆岩裂隙场呈现“裂隙产生-发育演化-局部压实-周期扩展-大部压实”动态演化规律,采动裂隙网络场发育、扩展、穿透演化分形特征;(2)阐明了采动覆岩失稳破断、运移与微震事件局部“高频次-大能量”集中区时空演化规律,“高频次-大能量”与“低频次-小能量”集中区呈现周期分布,同工作面周期来压特征相吻合,微震事件集中区发生位置普遍超前工作面80~120 m;(3)数值模拟采动覆岩裂隙演化高度与微震监测所得结果基本一致;(4)倾向高位岩层微震事件“高频次-大能量”与“低频次-小能量”集中区呈现两端高、中间低“类马鞍形”分布,走向高位岩层微震事件能量集中区呈现“椭球状”分布,数量集中区呈现“条带状”分布。The evolution height and distribution pattern of fractures in overburden strata induced by mining are among the crucial parameters for preventing and controlling roof water disasters.Taking the 3105 working face of a specific mine in Inner Mongolia as the engineering background,and utilizing numerical simulation,fractal geometry theory,and three-dimensional spatial analysis of microseismic events,we aim to clarify the spatiotemporal evolution laws of the mining-induced overburden fracture field and microseismic events.The results are as follows:①Revealed the dynamic evolution law of“fracture generation,development,evolution,local compaction,periodic expansion,and large-scale compaction”in the mining overburden fracture field,as well as the fractal characteristics of the development,expansion,and penetration evolution of the mining fracture network field.②This paper eluci-dates the spatiotemporal evolution law of the local“High frequency-high energy”concentration zone associated with mining-induced overburden instability,fracture,migration,and microseismic events.The“High frequency-high energy”and“Low frequency-small energy”concentration zones exhibit a pe-riodic distribution,which aligns with the periodic weight-bearing characteristics of the working face.Typically,the location of microseismic event concentration zones precedes the working face by 80-120 m.③The evolution of the height of mining-induced fractures in the overburden rock,as deter-mined by numerical simulation and microseismic monitoring,is basically consistent.④The concentra-tion areas of“High frequency-high energy”and“Low frequency-small energy”microseismic events tend to show a“Saddle like”distribution with high ends and low middle,while the energy concentration areas of high-level microseismic events tend to show an“Ellipsoidal”distribution,and the quantity con-centration areas show a“Strip like”distribution.

关 键 词：微震监测 数值模拟 采动覆岩 裂隙场演化 分形特征 

分 类 号：TD325[矿业工程—矿井建设]