针对南方红黄壤的理化性质,基于EDEM软件选取Hertz-Mindlin with JKR模型作为红黄壤的接触模型进行参数标定,通过试验获取了红黄壤的本征参数;通过数据库确定了接触参数的取值范围;通过堆积角试验完成了红黄壤物理参数的标定。以实际堆...针对南方红黄壤的理化性质,基于EDEM软件选取Hertz-Mindlin with JKR模型作为红黄壤的接触模型进行参数标定,通过试验获取了红黄壤的本征参数;通过数据库确定了接触参数的取值范围;通过堆积角试验完成了红黄壤物理参数的标定。以实际堆积试验测得的堆积角29.5°为仿真土壤模型堆积角寻优目标,通过寻优得到最优组合参数:JKR表面能0.84 J/m^(2)、恢复系数0.32、静摩擦因数0.63、动摩擦因数0.46,该参数的仿真堆积角与试验测定堆积角误差为1.0%。利用堆积角试验的最优参数作为南方红黄壤-65Mn接触仿真过程的土壤参数,以物理穿刺试验与仿真穿刺试验对比进行红黄壤-65Mn接触参数标定,得到红黄壤-65Mn之间的接触参数:静摩擦因数0.32、滚动摩擦因数0.50、碰撞恢复系数0.20,并通过对比物理试验与仿真试验中力-位移变化曲线的拟合情况分析仿真参数可靠性,结果表明标定得到的相关参数可用于南方红黄壤的离散元仿真。展开更多
A discrete-event system simulation and animation program was developed to enhance the efficiency of a truck-excavator operation and reduce the environmental impact of haulage in an open-cut coal mine with multiple-pit...A discrete-event system simulation and animation program was developed to enhance the efficiency of a truck-excavator operation and reduce the environmental impact of haulage in an open-cut coal mine with multiple-pit operations. In any mine, a key objective is to have sufficient equipment for production and not to have excess to where it becomes counterproductive. Due to the advent of responsible mining,environmental regulations, and eco-friendly practices, these factors must also be considered in the analysis. Simulation studies can be financially advantageous for both the optimization of existing mine operations and new development phases in a mine. This study is a new approach to use discrete-event system simulation for mine systems, in order to investigate and possibly reduce environmental impact considering mining haulage performance and production target. A hypothetical layout of a surface coal mine with two pit operations was used for the simulation and animation model. The simulation model includes the animation of the operation. Animation is helpful to enhance the benefit of a mine simulation model. GPSS/Hòand Proof Professionalòwere the software used for the investigation.展开更多
文摘针对南方红黄壤的理化性质,基于EDEM软件选取Hertz-Mindlin with JKR模型作为红黄壤的接触模型进行参数标定,通过试验获取了红黄壤的本征参数;通过数据库确定了接触参数的取值范围;通过堆积角试验完成了红黄壤物理参数的标定。以实际堆积试验测得的堆积角29.5°为仿真土壤模型堆积角寻优目标,通过寻优得到最优组合参数:JKR表面能0.84 J/m^(2)、恢复系数0.32、静摩擦因数0.63、动摩擦因数0.46,该参数的仿真堆积角与试验测定堆积角误差为1.0%。利用堆积角试验的最优参数作为南方红黄壤-65Mn接触仿真过程的土壤参数,以物理穿刺试验与仿真穿刺试验对比进行红黄壤-65Mn接触参数标定,得到红黄壤-65Mn之间的接触参数:静摩擦因数0.32、滚动摩擦因数0.50、碰撞恢复系数0.20,并通过对比物理试验与仿真试验中力-位移变化曲线的拟合情况分析仿真参数可靠性,结果表明标定得到的相关参数可用于南方红黄壤的离散元仿真。
文摘A discrete-event system simulation and animation program was developed to enhance the efficiency of a truck-excavator operation and reduce the environmental impact of haulage in an open-cut coal mine with multiple-pit operations. In any mine, a key objective is to have sufficient equipment for production and not to have excess to where it becomes counterproductive. Due to the advent of responsible mining,environmental regulations, and eco-friendly practices, these factors must also be considered in the analysis. Simulation studies can be financially advantageous for both the optimization of existing mine operations and new development phases in a mine. This study is a new approach to use discrete-event system simulation for mine systems, in order to investigate and possibly reduce environmental impact considering mining haulage performance and production target. A hypothetical layout of a surface coal mine with two pit operations was used for the simulation and animation model. The simulation model includes the animation of the operation. Animation is helpful to enhance the benefit of a mine simulation model. GPSS/Hòand Proof Professionalòwere the software used for the investigation.
