The determination of damage height of superincumbent stratum of goaf has immense meaning for safety and reasonable exploitation of coal seam under water body, building and railway.
确定采空区上覆岩层破坏高度，对“三下”煤层安全、高效开采具有重要意义。
2
With the effective seam weld fatigue life prediction method, the fatigue damage and life of the seam weld under actual vehicle operating conditions can be calculated.
采用该方法可计算出真实运行工况下结构焊缝的疲劳损伤和寿命情况。
3
In this paper, a rheologic damage fracture model for jointed rocks is built and is utilized to analyze stability of seam floor rocks in mining.