摘要
基于连续离散元理论方法对长壁开采工作面进行数学模型建立,通过数值模拟得出支护阻力和覆岩移动的动态耦合关系。以寸草塔煤矿工作面为工程研究案例,根据实际地质条件和运行特征通过CDEM数值模拟软件建立了二维数学模型,研究得出了煤矿开采过程中不同开采高度对顶板垮塌过程,覆岩运移规律特征,覆岩平衡稳定状态以及支护阻力和围岩耦合关系的影响。通过分析数值模拟结果,可以得出不同开采高度后的支架阻力变化的内部影响因素,并且从模拟结果还可以得出不同开采高度和支护阻力的定量关系。
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. The working face of Cuncaota coal were used as a case example. The CDEM 2D model was constructed on Cuncaota coal field shield＇s operation characteristics and geological conditions. The 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. By analyzing the numerical simulation results, 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.
作者
汪腾蛟
WANG Teng-jiao(Cuncaota Coal of Shendong Coal Group, Erdos 017205, China)
出处
《煤矿机械》
2017年第9期41-45,共5页
Coal Mine Machinery
关键词
数值模拟
支护阻力
围岩与支护关系
numerical simulation
shield resistance
interaction between shield and surrounding rock
