煤矿覆岩离层注浆减缓地表沉降效果评价方法探讨

Discussion of the Methods for Evaluating the Result of Surface Subsidence Reduction Obtained through Grouting the Separated Beds in Overburden

文中通过对我国覆岩离层注浆减缓地表沉降试验实例分析 ,探讨了采用这种技术的减沉效果 ,分析了一些实例中计算的减沉效果过大的原因 ,指出用地表移动预计值与实测值进行比较不能反映出离层注浆的真实减沉效果 ,提出了准确评价离层注浆减沉效果的方法。

Based on the analysis of typical cases, a discussion is made of the performance of grouting techniques used for subsidence reduction. It is pointed out that the effectiveness of such techniques as calculated in some of the cited examples is overestimated. It is noed tha he actual performance of grouting operations should not be determined based on the comparison between the predicted and actually observed ground subsidence values. Finally, a method for precise performance determination of grouting technique for reduced ground subsidence is proposed. (Wang Jinzhuang et al)