煤矿巷道冒顶区的加固充填技术

矿井生产或掘进过程中,巷道顶板或顶煤在上覆岩层压力下会经常发生冒顶等事故,若处理不当,将影响矿井的安全生产.本文介绍的用充填化学材料进行冒顶区的处理方法,取得了较好的效果,可供类似条件的矿区参考.     

城市轨道交通项目设计管理模式分析

本主要从城市轨道交通项目设计工作的特点出发，介绍了目前常见的两种设计管理模式，并对这两种模式进行对比分析。在此基础上，进一步探讨设计总体管理模式在工程实例中的运用。     

利民煤矿16#煤层巷道围岩控制措施实验研究

利民煤矿16#煤层受地质条件等因素的影响,煤炭开采受到巷道支护问题的严重制约。为了解决这一问题,在16#煤层进行新的加强支护实验,优化原有巷道支护系统,从而达到对巷道围岩的有效控制,提高巷道支护的质量。     

Coordinating debris cleanup operations in post disaster road networks

We propose a constructive heuristic that generates roadside debris cleanup plans for a limited number of equipment in the post-disaster road recovery planning problem. Travel times between cleanup tasks are not pre-fixed but depend on the blockage status of the entire road network at the time of travel. We develop a novel mathematical model that maximizes cumulative network accessibility throughout the cleanup operation and minimizes makespan. We propose several practical and robust task selection rules that favor one or both goals that are tested on realistic size road networks with deterministic and stochastic debris cleanup times.