五家沟煤矿5105工作面水下开采安全性研究  

Study on safety of underwater mining in working face 5105 of Wujiagou Coal Mine

作　　者：孙勇 SUN Yong(Shanxi Shuozhou Shanyin Gold Ocean Wujiagou Coal Industry Co.,Ltd.,Shuozhou Shanxi,036900)

机构地区：[1]山西朔州山阴金海洋五家沟煤业有限公司,山西朔州036900

出　　处：《煤炭科技》2020年第4期1-6,27,共7页Coal Science & Technology Magazine

摘　　要：五家沟煤矿5105工作面属于典型的地表沟流下的浅埋综采放顶煤开采,利用FLAC3D软件对覆岩"三带"分布特征进行模拟分析,发现导水裂隙带直通地表,同时采用COMSOL Multi鄄physics软件中流体流动模块对5105工作面大沙沟地表水沿采动裂隙通道涌入回采空间进行模拟,发现若在丰水期(6—8月)开采,大沙沟季节性河流对工作面开采有一定的影响。5105工作面采用狭长坑道法计算正常涌水量为27.02 m^3/h,采用动静态水结合预测法计算最大涌水量为45.62 m^3/h。故提出5105工作面季节性河流下枯水期开采,采后对地表水体进行堵截治理的开采方案,实现了5105工作面的安全开采,为今后矿井安全生产奠定了基础,同时对类似条件水下开采具有一定的借鉴意义。The 5105 working face of Wujiagou Mine is a typical shallow fully-mechanized caving working face under the surface ditch flow.In this paper,FLAC3D software was used to simulate and analyze the distribution characteristics of"three zones"of overburden,and it was found that the water conducting fracture zone is directly connected to the surface.At the same time,At the same time,the fluid flow module of COMSOL multiphysics software was used to simulate the surface water flowing into the mining space along the mining fracture channel in 5105 working face.It was found that the seasonal river of Dashagou has a certain influence on the mining of the working face if it is mined in the high water period(June to August).In 5105 working face,the normal water inflow is 27.02 m^3/h calculated by the narrow tunnel method,and the maximum water inflow is 45.62 m^3/h calculated by the dynamic and static water combined prediction method.On the basis of the above research,the mining scheme of mining in the dry season under the seasonal river in the 5105 working face and blocking the surface water body after mining was put forward.The safe mining of the 5105 working face has laid a foundation for the safe production of the mine in the future,and has certain reference significance for the underwater mining with similar conditions.

关 键 词：浅埋煤层 覆岩三带 几何模型 COMSOL Multiphysics 开采方案 

分 类 号：TD745[矿业工程—矿井通风与安全]