mine old goaf 老采空区
abandoned old goaf 老采空区
seeper from old goaf 老空积水
old goaf partial ponding 老空区局部积水
The gradual settlement above old goaf threatens the safety of surface buildings.
采空区造成地层缓慢沉陷，严重威胁地表建筑物的安全。
Here a few words, many windbag old car engine gearbox bottom paste with a thick layer of clay, these things can be cleared up off the best, because once the goaf, these things are good burnable.
在这里啰嗦几句，很多老车的发动机变速箱底部都糊着一层厚厚的油泥，这些东西最好能及时清理掉，因为一旦发生自燃，这些东西可都是良好的可燃物。
The foundation stability and residual deformation must be evaluated before building life or service facilities above old mine goaf.
在老采空区上方建设生活或服务设施时，必须对老采空区上方地基稳定性和残余变形情况进行评价和预测。
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