皖北孙疃煤矿防砂煤岩柱开采可行性研究  

Feasibility Study on Sand-Proof Coal Column Mining of Suntuan Coal Mine in Northern Anhui Province

作　　者：杜宗庆 陈东 DU Zongqing;CHEN Dong(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,合肥230601

出　　处：《长春工程学院学报（自然科学版）》2023年第4期1-7,共7页Journal of Changchun Institute of Technology：Natural Sciences Edition

基　　金：安徽高校自然科学研究项目(KJ2021A0608);安徽省住房城乡建设科学技术计划项目(2020-YF47)。

摘　　要：为探究防砂煤岩柱开采是否可行,以皖北某煤矿的地质资料和工作面概况为基础,通过理论计算垮落带高度、保护层厚度以及安全防砂煤岩柱最大高度,并运用FLAC 3D软件对煤岩柱合理留设的大小进行科学研究。结果表明:参照规范,当覆岩为软弱型和中硬型时,垮落带分别为9.59 m、14.17 m,保护层厚度分别是10.4 m、15.6 m,安全防砂煤岩柱的最大高度为29.77 m。覆岩产生的竖向应力、位移以及剪切应力均在安全开采的范围之内,煤矿开采是合理的、可行的。In order to explore whether the mining of sand-proof coal column is feasible,the height of the collapse zone,the thickness of the protective layer,and the maximum height of the safety sand-proof coal rock pillar are theoretically calculated,taking the geological data and working face overview of a coal mine in northern Anhui as the basis,and the reasonable size of the coal rock pillar is studied by FLAC 3D software.The results show that,according to the specifications,when the overlying rock is the type of weak and medium hard,the collapse zone is 9.59 m and 14.17 m respectively,the thickness of the protective layer is 10.4 m and 15.6 m respectively,and the maximum height of the safety sand-proof coal rock column is 29.77 m.The vertical stress,displacement,and shear stress generated by the overlying rock are all within the safe mining range,and coal mining is reasonable and feasible.

关 键 词：煤柱留设 FLAC 3D 优化设计 可行性 

分 类 号：TU43[建筑科学—岩土工程] TD31[建筑科学—土工工程]