似膏体充填开采顶板裂采比的确定

Determination of H-T Ratio of Roof in Paste-like Filling Mining

采高是影响"三带"高度的最主要因素,某煤矿试采工作面采用似膏体充填开采,进而降低采高,达到降低"三带"高度的目的。通过理论推导,其等价采高为0.541 m。通过相似材料模拟得其裂隙带高度为12.9 m,通过实测确定得其裂隙带高度为13.2 m。通过以上实验得出充填开采不存在垮落带,只有裂隙带和弯曲下沉带。

The mining height is the main factor which influences the height of the ＂three zones＂, to lower the height of the ＂three zones＂ across reducing the mining height, paste-like filling mining technology is adopted in a working face of a mine. After theoretical derivation,the equivalent mining height is 0.541 m. While the height is 12.9 m,it is concluded by similar material simulation. The measured height of fractured is 13.2 m. The above experiments shows that there is only fractured zone and sagging zone ,that is to say without caving zone, in overlaying rock when filling mining technology is adopted.