济宁井工矿区不同开采条件对沉陷阶段的影响  

Influence of different underground mining conditions on the ground surface subsidence in the Jining coal district

作　　者：蒋旭梓 李新举[1,2] 闵祥宇 叶甜甜[1,2] 孙铭岳 JIANG Xuzi;LI Xinju;MIN Xiangyu;YE Tiantian;SUN Mingyue(College of Resources and Environment,Shandong Agricultural University,Tai'an 271018,China;National Engineering Center for Efficient Utilization of Soiland Fertilizer,Tai'an 271018,China)

机构地区：[1]山东农业大学资源与环境学院,山东泰安271018 [2]土肥高效利用国家工程研究中心,山东泰安271018

出　　处：《采矿与岩层控制工程学报》2022年第6期65-74,共10页Journal of Mining and Strata Control Engineering

基　　金：国家自然科学基金资助项目(42077446)

摘　　要：为了研究不同开采条件对济宁井工开采煤矿区沉陷阶段的影响,选取6个代表工作面,通过沉陷阶段图、相关性分析及函数拟合模型对各工作面沉陷过程及阶段性特征影响程度进行分析。结果表明:①单一工作面、邻采空区工作面和多工作面下沉量主要来源于活跃期,初始期和衰退期下沉量差异明显;不同类型工作面地表移动持续时间差异较大,且主要贡献部分来源于不同沉陷阶段;②工作面倾向长是影响地表沉陷过程阶段性特征的关键因素,不同采矿、地质条件对3个沉陷阶段的影响程度:工作面倾向长>煤层埋深>煤层厚度>工作面推进速度;③单一工作面和多工作面要比邻采空区工作面更容易达到充分开采。Six representative working faces were selected to study the influence of different mining conditions on the ground surface subsidence at the Jining coal district.The study was achieved by means of evaluating the subsidence stage chart,performing correlation analysis and evaluating the process of subsidence and the degree of influence of phase characteristics of each working face using function fitting model.The following results were obtained.The ground subsidence of single working face,adjacent goaf working face and multi-working faces mainly comes from the active period,and the difference of subsidence between initial period and declining period is distinct.The surface movement duration of different types of working faces is different,and the main contribution comes from the different subsidence stages.The working face inclination length is the key factor affecting the stage characteristics of the subsidence process.The influence of different mining and geological conditions is in the sequence of the working face's length>the coal seam depth>the coal seam thickness>the working face advancing speed.It is easier to achieve full mining in single face and multi-faces than in the adjacent goaf face.

关 键 词：井工矿区 工作面类型 开采条件 沉陷阶段 影响程度 

分 类 号：TD325[矿业工程—矿井建设]