老空水体下工作面安全开采技术研究  

Research on Safe Mining Technology for Working Face Under Old Empty Water Body

作　　者：李小四 岳阳 Li Xiaosi;Yue Yang(Ningxia Coal Industry Co.,Ltd.,National Energy Group,Ningxia,751000;School of Mining Engineering,China University of Mining and Technology,Jiangsu,221116;Ningxia Coal Basic Construction Co.,Ltd.,National Energy Group,Ningxia,751000)

机构地区：[1]国家能源集团宁夏煤业有限责任公司,宁夏751000 [2]中国矿业大学矿业工程学院,江苏221116 [3]国家能源集团宁夏煤炭基本建设有限公司,宁夏751000

出　　处：《当代化工研究》2025年第5期115-117,共3页Modern Chemical Research

摘　　要：以5煤首采工作面为研究对象,采用理论分析与数值模拟的方法,分析了工作面开采与上覆采空区老空水体的相互影响关系,并提出了水体下工作面安全开采技术。结果表明:(1)老空水体下的5煤工作面开采导水裂隙带最大发育高度为51.7m,导通了采空区老空水体。(2)围绕5煤赋存环境,提出了限高开采技术,计算出了安全采厚为1.58m,并采用数值模拟进行了验证。(3)设计了工作面顶板疏放水方案,给出了合理的疏水孔布置参数。(4)增长了巷道锚索长度,提高了老空水体内围岩30%承压力,保障了水体的原位性,阻断了局部导水裂隙的生成,有效地减少了老空水流入工作面巷道内。Taking the first mining face of coal seam 5 as the research object,theoretical analysis and numerical simulation methods were used to analyze the mutual influence relationship between mining face and the old water body in the overlying goaf,and the safe mining technolo-gy of the working face under the water body was proposed.The results show that:(1)The maximum development height of the water conducting frac-ture zone in the 5-coal working face under the old goaf water body is 51.7 m,which connects the old goaf water body in the goaf area.(2)A height limit mining technology was proposed around the occurrence environment of coal seam 5,and the safe mining thickness was calculated to be 1.58 m,which was verified by numerical simulation.(3)Designed a drainage plan for the working face roof and provided reasonable parameters for the ar-rangement of drainage holes.(4)The length of the anchor cable in the roadway has been increased,and the bearing pressure of the surrounding rock in the old air body has been increased by 30%,ensuring the in-situ stability of the water body,blocking the generation of local water conducting cracks,and effectively reducing the inflow of old air water into the working face roadway.

关 键 词：老空水 导水裂隙带高度 限高开采 疏放水 围岩支护强度 

分 类 号：TD823[矿业工程—煤矿开采]