相邻工作面开采扰动下覆岩破坏及地表沉降特征研究  

Study on Failure and Surface Settlement Characteristics of Overburden Rock under Mining Disturbance of Adjacent Working Faces

作　　者：喻军健 张庆海 纪新波 陈军涛[1,2,5] 范铭今 李果 YU Junjian;ZHANG Qinghai;JI Xinbo;CHEN Juntao;FAN Mingjin;LI Guo(College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China;Shandong Ding′an Testing Technology Co.,Ltd.,Jinan 251600,China;Suncun Coal Mine,Shandong Energy Xinwen Mining Group,Tai′an 271219,China;National Demonstration Center for Experimental Mining Engineering Education,Qingdao 266590,China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013 [3]山东鼎安检测技术有限公司,济南251600 [4]山东能源新矿集团孙村煤矿,山东泰安271219 [5]矿业工程国家级实验教学示范中心,山东青岛266590

出　　处：《煤炭技术》2024年第9期6-11,共6页Coal Technology

基　　金：国家自然科学基金项目(51974172);煤炭资源高效开采与洁净利用国家重点实验室资助项目(2021-CMCU-KF015);山东省自然科学基金项目(ZR2022ME140,ZR2020ME102);山东科技大学科研创新团队支持计划项目(2018TDJH102)。

摘　　要：为研究相邻工作面开采扰动下工作面上方覆岩破坏及地表移动特征,以新疆某矿地质条件为基础,采用相似材料模拟试验研究了相邻工作面开采扰动下工作面上方覆岩破坏特征,并结合数值模拟分析地表沉降规律。研究表明:受相邻工作面采动影响,工作面上方覆岩非贯通裂隙左侧和左下方各发育有两段微小横向非贯通裂隙,导水裂缝带高度由74.5 m发育至78.2 m;相邻工作面开采后中间区段煤柱由于支撑压力叠加,覆岩产生较高的剪切破坏,工作面覆岩破坏高度受二次扰动影响提高12.35%,整体破坏形态呈“马鞍形”;结合地表沉降监测数据,单工作面开采地表沉降值2.85 m,移动下沉曲线呈“V”形,受相邻工作面采动影响,地表下沉系数增长6.7%。研究结果可为类似矿井工作面安全开采提供参考依据。In order to study the damage characteristics of overlying strata above a working face and surface movement under mining-induced disturbances of adjacent working faces,using geological conditions from a mine in Xinjiang as a basis.Similar material simulation experiments were conducted,and numerical simulations were employed to analyze surface subsidence patterns.The research indicates that adjacent mining activities significantly influence the damage features of overlying strata above the working face,two small lateral non-through fractures develop on the left and left of the non-through fracture of the overburden above the goaf,and the vertical fracture develops from 74.5 m to 78.2 m.After the adjacent mining faces,the coal pillar in the middle section experiences elevated shear failure due to the cumulative support pressure and results in higher strata damage.The height of overlying strata damage in the face area increases by 12.35%due to secondary disturbances,and the overall failure pattern exhibits a"saddle-shaped form".Combined with the surface subsidence monitoring data,the surface subsidence value of a single working face is 2.85 m,and the mobile subsidence curve is"V"shape.Under the influence of adjacent working faces,the surface subsidence coefficient increases by 6.7%.The research results can provide reference for the safe mining of similar working faces.

关 键 词：相邻工作面 覆岩破坏 地表沉降 下沉系数 导水裂缝带 

分 类 号：TD325[矿业工程—矿井建设]