摘要
根据朱仙庄矿区的地质条件,运用相似模拟实验方法模拟分析了厚松散含水层下特厚煤层一次采全厚综放开采时覆岩破坏及位移特征,得出了覆岩冒落带、裂隙带高度成阶梯跳跃式发展并趋于稳定,确定了其发育高度.随着工作面的推进,采空区不断扩大,覆岩的各组岩层出现了不同程度的移动下沉,各岩层中最大下沉量基本处于采空区中部上方.揭示了工作面在开挖过程中覆岩的应力分布规律,为采场的支护设计提供了依据.
According to the geological conditions of Zhuxianzhuang mine area,similar simulation experiment method has been used to analyze overburden rock damage and displacement characteristics of extra thick coal seam under thick loose aquifer during fully-mechanized once caving mining.Conclusion has been obtained that height of overlying strata caving zone and fractured zone develops as ladder by leaps and bounds and to be stable.Development height has been determined.As working face advancing,gob becomes larger and larger,each stratum of overlying strata forms obvious mobile sinking basin.The maximum subsidence of strata is in the middle area of gob.Stress distribution law has been shown during the process of advancing working face,to provide a basis for supports design of stope.
出处
《矿业工程研究》
2013年第4期47-50,共4页
Mineral Engineering Research
基金
安徽省杰出青年基金资助项目(1108085J02)
关键词
厚松散含水层
特厚煤层
覆岩破坏
相似模拟
thick loose aquifer
extra thick coal seam
overburden failure
similar simulation
