Inner Mongolia Shuangxin Mining Co. , Ltd.
Coal Mining and Designing Department, Tiandi Science and Technology Co. , Ltd.
CCTEG Coal Mining Research Institute

基于内蒙古双欣矿业有限公司实测资料,利用开采沉陷理论、数值模拟等方法,研究了浅埋深、多煤层开采地表移动规律和移动参数。对初次采动、重复采动等不同条件下的地表移动观测数据进行了总结和分析。结果表明,浅埋深多煤层开采条件下,地表移动的初始期和活跃期均较短,其中地表移动初始期约0.5个月,活跃期一般为3~6个月;受老采空区的活化作用影响,下层煤开采地表下沉系数、主要影响角正切明显增大,双欣矿业浅埋深多煤层开采老采空区活化系数可取为0.045~0.13;上覆岩层的破坏主要为剪切破坏和拉张破坏,地表易出现地裂缝等不连续变形,并在地表形成波浪状下沉盆地。

Based on the measured data of Inner Mongolia Shuangxin Mining Co. , Ltd. , using mining subsidence theory, numerical simulation, and other methods, the law and parameters of surface movement in shallow and multi-seam coal mining were studied. The observation data of surface movement under different conditions such as initial mining of upper coal and repeated mining of lower coal are summarized and analyzed. The results show that the initial period and active period of surface movement are relatively short, with the initial period of surface movement being about 0. 5 months and the active period generally being 3~6 months; due to the activation effect of the old goaf, the surface subsidence coefficient and the tangent of the main influencing angle significantly increase during the mining of the lower coal seam. The activation coefficient of the old goaf in the shallow and multi-seam mining can be taken as 0. 045~0. 13; the damage of the overburden mainly includes shear damage and tensile damage. The surface is prone to discontinuous deformation such as ground fissures, and forms a wavy subsidence basin on the surface.

王卫东, 郭先顺, 王明立, 等. 浅埋深多煤层开采地表移动规律实测与分析 [J]. 煤炭工程, 2023, 55(11):136-141.