丰达煤矿水文地质条件分析与防治对策研究

Study on hydrogeological conditions on prevention and control countermeasures in Fengda Coal Mine

急倾斜煤层覆岩破坏发育规律较为复杂,其顶板导水裂隙带发育高度不完全可控,其浅部老空老窑积水易构成较大隐患。针对丰达煤矿急倾斜的二1煤层,矿井安全生产面临较严重的浅部老窑积水水害威胁状况,通对分析矿井水文地质条件尤其是老空水和地下水水害威胁程度,提出了“地面井下相结合、探查疏放工作持续开展、老窑灰岩水害防治兼顾”的防治对策,开展井下泄水巷结合常规钻探疏放老空水同时对寒灰水进行探查,确保浅部老空水疏干放净和寒灰水安全带压开采,为矿井安全采掘和急倾斜煤层的探查与防治提供对策。

The development law of overburden failure in steeply inclined coal seam is relatively complex,the development height of water flowing fractured zone in roof is not completely controllable,and the accumulated goaf water in shallow part is easy to constitute a big hidden danger.In view of steeply inclinedⅡ1 coal seam in Fengda Coal Mine,mine safety production is faced with serious threat of water accumulation in shallow goaf water.Through analyzing the hydrogeological conditions of the mine,especially the threat degree of water damage caused by old empty water and underground water,the prevention and control countermeasures of"combination of surface and underground,continuous exploration and drainage work,prevention and control of water damage caused by limestone in old goaf"were put forward.The underground drainage roadway is developed in combination with conventional drilling and drainage of old goaf water while Cambrian limestone water was explored,to ensure that the shallow old goaf water is drained and the Cambrian limestone water is mined under safe water pressure of aquifer,thus providing countermeasures for safe mining of the mine and exploration and prevention of steeply inclined coal seams.