矿业科学学报2025，Vol.10Issue(1)：70-85,16.DOI:10.19606/j.cnki.jmst.2024921
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
摘要
Abstract
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 e-vents,we aim to clarify the spatiotemporal evolution laws of the mining-induced overburden fracture field and microseismic events.The results are as follows:① Revealed 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 devel-opment,expansion,and penetration evolution of the mining fracture network field.② This 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.③ The evolution of the height of mining-induced fractures in the overburden rock,as deter-mined by numerical simulation and microseismic monitoring,is basically consistent.④ The 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 ar-eas 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Key words
microseismic monitoring/numerical simulation/mining the overlying rock/fracture field evolution/fractal feature分类
矿山工程引用本文复制引用
谭毅,张少普,何满潮,郭文兵,丁国利,王宇,程浩,李辉..巨厚砂岩下采动覆岩裂隙场及微震时空演化规律研究[J].矿业科学学报,2025,10(1):70-85,16.基金项目
国家自然科学基金(52322403,52174108,51974105) （52322403,52174108,51974105）
河南省优秀青年科学基金(222300420045) （222300420045）
