近松散含水层下浅部煤层开采安全煤柱合理留设研究  

Research on Reasonable Setting of Safe Coal Pillars in Shallow Coal Seam Mining Under Near Loose Aquifer

作　　者：胡洋 桂和荣 李业 HU Yang;GUI Herong;LI Ye(School of Resources and Civil Engineering,Suzhou University,Suzhou 234000,China;Qinan Coal Mine,Huaibei Mining Co.,Ltd.,Suzhou 234000,China)

机构地区：[1]宿州学院资源与土木工程学院,安徽宿州234000 [2]淮北矿业股份有限公司祁南煤矿,安徽宿州234000

出　　处：《宿州学院学报》2023年第9期35-40,共6页Journal of Suzhou University

基　　金：宿州学院博士启动资金项目(2021BSK014);宿州学院博士后启动资金项目(2022BSH003);宿州学院重点项目(2021yzd04)。

摘　　要：基于祁南煤矿312工作面的水文地质及开采条件和“四含”抽水试验成果,判定研究区“四含”水体采动等级为Ⅱ类水体,应留设防砂煤(岩)柱开采。采用《建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程》推荐公式、实测类比分析、数值模拟的综合研究方法,分析得出工作面回采过程中的垮落带高度分别为:21.07 m、16.32 m和20 m,在判断覆岩坚硬程度为中硬型的基础上,计算出工作面安全回采的临界防砂煤(岩)柱尺寸为31.27 m,小于312工作面内钻孔实揭的最小煤(岩)柱尺寸,因此工作面回采较为安全。研究成果可为解决相似地质与开采条件下工作面的安全煤柱留设问题提供参考。Based on the hydrogeological and mining conditions of the 312 working face of the Qinan Coal Mine,as well as the results of the"four aquifers"pumping test,it is determined that the mining level of the"four aquifers"water body in the research area is Class II,and sand proof coal(rock)pillars should be reserved for mining.By using the recommended formula of Regulations for Retaining and Mining Coal Pillars in Buildings,Water Bodies,Railways,and Main Well Tunnels,as well as comprehensive research methods such as analogy analysis of actual mea-surement,and numerical simulation,the height of the collapse zone during the mining process of the working face was determined to be 21.07 m,16.32 m,and 20 m,respectively.Based on the judgment that the hardness of the overlying rock is medium hard,the critical size of the sand control coal(rock)pillar to ensure the safe mining of the working face was calculated to be 31.27 m,which is smaller than the minimum size of coal(rock)pillar exposed through drilling in the 312 working face,so the mining of the working face is relatively safe.The research results can provide reference for solving the problem of safe coal pillar retention in working faces under similar geological and mining conditions.

关 键 词：防砂煤柱 垮落带 数值模拟 抽水试验 

分 类 号：TD745[矿业工程—矿井通风与安全]