In order to determine the initial weighting and periodic weighting step and the rationality of support selection of No.S1306 Face in Gucheng Mine,the mining pressure law of working face was studied through theoretical analysis and numerical simulation.Based on the theory of composite beam,the initial weighting step of working face was 44.03 m,and the periodic weighting step was 15.75 m,which was consistent with the measured values.The plastic zone,vertical stress and displacement of working face in different advancing ranges were simulated by numerical simulation.It was determined that the first caving step of the main roof of the working face was 46～49 m,and the periodic weighting step was 11～13 m,which was in good agreement with the measured values,and the support resistance of the working face met the production requirements of the working face.
关键词
组合梁理论/初次来压步距/周期来压步距/数值模拟
Key words
theory of composite beam/initial weighting step/periodic weighting step/numerical simulation
维普
万方数据