厚松散层薄基岩上分层开采覆岩移动规律

First Layer Mining Movement Behavior of Overlying Strata under Thick Alluvium and Thin Bedrock

结合赵固一矿11011工作面的具体地质条件,综合运用数值模拟和地表钻孔冲洗液漏失量观测方法,对采空区上覆岩层冒落带和裂隙带的高度进行了分析。工业性实验表明通过数值模拟确定的"两带"高度是合理的,进而确定了上分层开采防水安全煤岩柱尺寸及合理安全开采厚度。

Based on concrete geological condition of 11011 panel in Zhaogu No.1 coal mine, numerical simulation and observation method for leakage of surface drilling tluid are used to analyze the height ot the caving zone and the fracture zone of overlying strata. Industrial experiments show that the height of the ＂two zones＂ determined by numerical simulation is reasonable.And then waterproof safety coal pillar size and reasonable safe mining thickness are determined according to research result.