近距离煤层群多次采动条件覆岩“三带”特征模拟研究  

Simulation study on "three zones" characteristics of overlying rock under multiple mining conditions in close distance coal seam group

作　　者：白付干 李润芝 刘义孟 白壁 薛恩思 穆小峰 Bai Fugan;Li Runzhi;Liu Yimeng;Bai Bi;Xue Ensi;Mu Xiaofeng(Shanxi Zhongyang County Rongxin Coking Co.Ltd.,Lvliang 033400,China;China Coal Research Institute,Beijing 100013,China;China Coal Technology and Engineering Croup Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China)

机构地区：[1]山西省中阳荣欣焦化有限公司,山西吕梁033400 [2]煤炭科学研究总院,北京100013 [3]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [4]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤炭与化工》2025年第4期33-35,40,共4页Coal and Chemical Industry

摘　　要：为探究近距离煤层群多次采动影响下顶板覆岩的破坏规律,以高家庄煤矿上组煤为研究对象,通过构建FLAC3D数值模型,模拟开采3号煤层上覆煤岩体的破坏形式和运动规律。研究结果表明:多次采动条件下,采空区上覆岩层移动趋势相似,但上覆岩层的下沉量明显增大,且呈现出多岩层整体协调下沉的运动规律,上覆岩层破坏程度增大,尤其是部分周期来压时,破断岩层发生台阶式下沉,呈现出局部位移场演化剧烈的特征。模拟结果表明:3号煤层开采期间工作面上方15 m内的岩层处于垮落带范围,3号煤层上方35 m范围有可能为裂隙带;相比首采煤层,上覆岩层破坏程度更为明显。In order to explore the destruction law of roof clad rock under the influence of multiple mining of close distance coal seam group,the upper coal group of Gaojiazhuang Mine was taken as the research object,the FLAC numerical model was constructed to simulate the destruction form and movement law of overlying coal rock mass when mining the No.3 coal seam.The results showed that:under the condition of many mining,the goaf rock movement trend was similar,but overburden subsidence increased significantly,and presented the movement of the overall coordinated subsidence,overburden damage degree increased,especially part of the cycle to pressure,broken rock stepped sinking,showing the characteristics of local displacement field evolution.The simulation results showed that the rock layer within 15m above the working face of No.3 coal seam was in the range of collapse zone,and the range of 35m above No.3 coal seam might be a crack zone;the damage degree of the first coal seam was more obvious.

关 键 词：近距离煤层群 多次采动 覆岩“三带”特征 模拟研究 

分 类 号：TD325[矿业工程—矿井建设]