综采放顶煤地表移动规律特殊性

Study on Special Regularity of Surface Movement Caused by FullyMechanized TopCoal Caving Mining

调查分析了兖州矿区鲍店矿综采放顶煤工作面和普通综采工作面地表移动观测站实测资料．研究结果表明：综放开采时地表移动更加剧烈，地表危险移动范围增大，超前影响范围超过常规分层开采约４０％，下沉活跃期占总移动时间的７１．４％，活跃期下沉量约占总下沉量的９５％．研究还表明，采厚是控制超前影响角和最大下沉速度滞后角的重要因素之一。

Through the analysis of surface subsidence data for fullymechanized topcoal caving mining and fullymechanized slicing mining, the special regularity of surface movement for fullymechanized topcoal caving mining is investigated. The result shows that much fiercer subsidence occurs and the area of critical deformation is enlarged for topcoal caving mining. The advance angle of influence is 40% larger than that for slicing mining. The active subsidence time (the subsidence velocity over 1.67 mm/d) is 71.4% of the total development time. The subsidence in active time is 95% of the total. The mining height is one of the most important factors affecting the advance angle of influence and the angle of maximum subsidence velocity. The residual deformation in full subsidence area increases.