下伏煤层开采导水断层防水煤柱留设宽度研究  

Research on Width of Water-proof Coal Pillar in Water-conducting Fault under Mining Condition of Underlying Coal Seam

作　　者：刘闯 李化敏[2] 鲁智豪 常发展 LIU Chuang;LI Huamin;LU Zhihao;CHANG Fazhan(School of Resource and Safety Engineering,Henan University of Engineering,Zhengzhou 451191,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南工程学院资源与安全工程学院,郑州451191 [2]河南理工大学能源科学与工程学院,河南焦作454003

出　　处：《煤炭技术》2022年第12期5-9,共5页Coal Technology

基　　金：河南省高等学校重点科研项目(22A440001);河南工程学院博士基金(DKJ2019001);2021年河南省国家级大学生创新创业训练计划项目(202111517007);河南省高校科技创新团队计划资助(22IRTSTHN009)。

摘　　要：基于长春兴煤矿601工作面上覆采空区与导水断层的地质条件,利用经验公式和理论分析确定了导水裂隙带发育最大高度和保护煤柱宽度范围。采用CDEM模拟软件建立下伏采煤工作面与断层相耦合的数值模型,模拟不同宽度保护煤柱工况下煤层开采对断层和上覆采空区岩层裂隙发育的影响规律。模拟结果表明,40 m保护煤柱条件下,601工作面煤层开采会显著影响断层和上覆采空区的导水裂隙发育;50 m保护煤柱条件下,601工作面煤层开采对上覆采空区裂隙发育产生影响,对断层无影响;60 m保护煤柱条件下,601工作面煤层开采对上覆采空区和断层区域的导水裂隙带发育均无影响。Based on the geological conditions of the overlying goaf and water-conducting fault in the601 working face of Changchunxing coal mine, empirical formulas and theoretical analysis were used to determine the maximum height of the water-conducting fracture zone and the width of the protective coal pillar. CDEM simulation software was used to establish a numerical model of the coupling between the underlying working face and the fault, and simulate the influence of coal seam mining on the development of faults and overlying goafs under different widths of protective coal pillars. The simulation results show that under the condition of 40 m protection coal pillar, coal seam mining at 601working face will significantly affect the development of faults and the development of water conducting fissures in the overlying goaf;under the condition of 50 m protection coal pillar, coal mining at 601working face will affect the overlying goaf. The development of fissures has an impact, but it has no effect on the fault;under the condition of a 60 m protective coal pillar, the mining of the coal seam in the 601 working face has no effect on the development of the overlying goaf and the water-conducting fissure zone in the fault area.

关 键 词：下伏煤层 导水裂隙 导水断层 防水煤柱 

分 类 号：TD822[矿业工程—煤矿开采] TD745[矿业工程—矿山开采]