Numerical simulation study on the relationship between mining heights and shield resistance in longwall panel  

作　　者：Liu Chuang Li Huamin Jiang Dongjie 

机构地区：[1]School of Energy Science and Engineering, Henan Polytechnic University [2]School of Safety Science and Engineering, Henan Institute of Engineering

出　　处：《International Journal of Mining Science and Technology》2017年第2期293-297,共5页矿业科学技术学报（英文版）

基　　金：funded by the National Natural Science Foundation of China (Nos. U1261207 and 51274086)

摘　　要：A numerical model based on a Continuum-based Distinct Element Method(CDEM) was used to carry out a dynamic simulation of the interaction between shield and rock strata movement in longwall mining. In Northern China, the Ordos coal field geological conditions and operational characteristics were used as a case example. The CDEM was constructed on Ordos coal field shield's operation characteristics and geological conditions. Numerical modelling was carried out to investigate the effects of different mining heights on the caving process, movement characteristics, equilibrium and stability conditions of overburden as the interaction between shield and surrounding rocks. With the numerical model, the internal factors for changes in shield resistance under different mining heights was found. The quantitative relationship between mining heights and shield resistance was also obtained by the numerical simulation.A numerical model based on a Continuum-based Distinct Element Method（CDEM） was used to carry out a dynamic simulation of the interaction between shield and rock strata movement in longwall mining. In Northern China, the Ordos coal field geological conditions and operational characteristics were used as a case example. The CDEM was constructed on Ordos coal field shield＇s operation characteristics and geological conditions. Numerical modelling was carried out to investigate the effects of different mining heights on the caving process, movement characteristics, equilibrium and stability conditions of overburden as the interaction between shield and surrounding rocks. With the numerical model, the internal factors for changes in shield resistance under different mining heights was found. The quantitative relationship between mining heights and shield resistance was also obtained by the numerical simulation.

关 键 词：Numerical simulation Shield resistance Interaction between shield and surrounding rock Mining heights 

分 类 号：TD823.4[矿业工程—煤矿开采]