许疃煤矿86采区10煤开采底板破坏深度预测

Prediction of Floor Failure Depth of the Coal Seam 10 in 86 Mining Area in Xutuan Coal Mine

淮北煤田许疃煤矿下组煤(10煤)开采受底板灰岩水的威胁严重。为了科学设计10煤开采方案、合理评价底板突水危险性,根据许疃煤矿86采区地质及水文地质条件,利用灰色BP神经网络法、经验公式法和解析计算法,预测该采区10煤开采底板破坏深度为9.26~19.75 m(平均16.0 m),鉴于该采区构造复杂、采深大,建议底板破坏深度取上限值(19.75 m)。研究方法及成果可供类似条件下的其他煤矿(区)参考。

The mining of lower group coal(the coal seam 10)in Xutuan coal mine of Huaibei coalfield is seriously threatened by floor limestone water hazard.In order to scientifically design the mining scheme of the tenth coal seam and reasonably evaluate the risk of floor water inrush,the methods of grey BP neural network,empirical formula and analytical calculation are used to predict the damage depth of the floor mining the coal seam 10 according to the geological and hydrogeological conditions of the 86 mining area in Xutuan coal mine,and the calculation results of which is 9.26~19.75 m(average 16.0 m).In view of the complex structure and large mining depth of the 86 mining area,the upper limit value(19.75 m)is recommended.The research methods and results can be used as a reference for other coal mines(or mining areas)under similar conditions.