大采高工作面覆岩移动规律的采厚效应

The Large Mining Height of Overlying Rock Moving Rule Mining Thickness Effect

为了确定大采高工作面覆岩移动规律与采厚的关系,以某矿201工作面为工程背景,采用UDEC数值模拟不同采厚下工作面推进过程中工作面发生初次来压时覆岩垮落特征、塑性区及主应力场分布范围。结果表明:随着工作面采高增加,工作面初次垮落步距增大、覆岩垮落高度增加,塑性区及主应力场分布范围变大,同时为合理开采提供有利依据。

In order to determine the large mining height strata movement rule and the relationship between mining thick,with 201 working face of a mine as engineering background,the state of numerical simulation under different mining thick supports to press for the first time in the process of working face advancing strata caving characteristics,plastic zone and the stress field distribution. Results show that with the increase of working face mining height are broken,first step caving working face distance increases,strata caving height increase,plastic zone and the stress field distribution,at the same time provide good basis for rational mining.