火烧积水区下煤层群上行式开采实证研究

Empirical study on ascending mining in coal seams under fired water-logged zone

榆树泉煤矿可采煤层群的上部煤层下5煤层大部分火烧,火烧区积水量较大,威胁着矿井的安全生产;同时,需要进行煤层群上行式开采。通过"三带"判断法、比值判断法、围岩平衡判断法和数理统计法进行了上行式开采可行性判断。结果表明:下7-2煤层不具备上行式开采及水体下开采的条件,下8煤层可进行局部的上行式开采及水体下开采,下10煤层可以进行全区的上行式开采及水体下开采。

In Yushuquan coal mine, Down -5 coal seam in the upper minable seams were mainly burned and water - logged, which endangered the safety of mining activities. Besides, it was better to mine the lower thick coal seams firstly, then the upper thinner ones. And it was also feasible to make ascending mining based on ＂ three zones＂ method, comparability test method, equilibrium method of surrounding rock and the empirical formula teaching mathematical statistics. The results showed the whole Down - 10 seam and part of Down - 5 seam could be made as- cending mining, but Down 7 -2 did not have the conditions.