峰峰矿区九龙矿水库下采煤安全性分析

Analysis of the security of mining under the reservoir in Jiulong Coal Mine of Fengfeng mining area

以九龙矿南五采区地质采矿条件为例,根据岩层移动理论,计算确定了该矿断层条件下煤层群(2,3,4号)开采覆岩导水裂缝带高度为62.4 m,防水安全煤岩柱高度为70.0 m;分析了陷落柱和库区钻孔的封堵状况对导水性的影响。采用概率积分法和Kriging插值法,预测确定了东武仕水库下采煤地表淹没线分布,分析了淹没线变化对附近村庄的影响和安全性。参照该矿-600 m以浅水体下采煤实践,综合确认九龙矿东武仕水库下采煤具有可行性,通过水文观测和适当的防范措施,可以实现该矿水库下安全开采。

Taking geological and mining conditions in south No. 5 Jiulong Coal Mine as example,according to the theory of strata movement,it was calculated and determined the height of water flowing fractured zone was 62. 4 m and the height of waterproof coal and rock pillars was 70. 0 m by mining Nos. 2,3 and 4 coal seam groups under fault conditions in this coal mine. The effect of water conductivity of collapse column and reservoir collapse block drilling to the height of water flowing fractured zone,was analyzed. The probability integration prediction method and Kriging interpolation method was used to predict and determine the distribution of surface reservoir inundation level by mining under the Dongwushi reservoir,and to analyze the influence and safety of nearby villages by the change of reservoir inundation level. Refer to the mining practice above-600 m level mining under the water bodies in the Jiulong Coal Mine,the mining under the Dongwushi reservoir was synthetically feasible. By hydrological observation and appropriate preventive measures,safe mining under the reservoir can be achieved.