Dynamic capacity balance between stripping and mining of a dragline stripping system  

作　　者：Shuangshuang Xiao Guowei Dong Hongsheng Wang 

机构地区：[1]School of Energy Engineering,Xi’an University of Science and Technology,Xi’an,710054,China

出　　处：《International Journal of Coal Science & Technology》2020年第2期380-387,共8页国际煤炭科学技术学报（英文）

基　　金：This work was supported by the Scientific Research Program Funded by Shaanxi Provincial Education Department(Program No.18JS067);the National Natural Science Foundation of China(Program No.51974231).

摘　　要：The reliability factors of a dragline stripping system were analyzed using system reliability theory to improve its reliability and ensure the stability of surface coal mine production.The relationship between the dragline scheduled stripping volume with both the weighted average thickness of the coal seam and the height of the blast casting bench was derived.The results show that the reliability of the dragline stripping system decreases with the weighted average thickness of the coal seam and increases with a reduced casting blast bench height and monthly raw coal production capacity.Furthermore,the dynamic monthly advance distance of the dragline stripping system was found,a new concept of the dragline stripping system reliability and measurement methodology were proposed,and a prediction model for the dragline production capacity was established using a generalized regression neural network.In addition,the steps and processes of the reliability were improved.The study on the Heidaigou surface mine shows that the height of the casting blast bench should be reduced to 10.5 m when its raw coal production capacity is improved from 20 to 30 Mt/a.During the normal production of surface coal,the system reliability can be improved by dynamically determining the weighted average coal seam thickness,accurately predicting the dragline production capacity,and taking other corresponding measures.

关 键 词：Surface mine Stripping technology RELIABILITY Dynamic adjustment 

分 类 号：TD82[矿业工程—煤矿开采]