海域煤层防水安全煤柱估算方法评述——以山东省黄县煤田梁家煤矿扩大区(西海域)为例

Estimation Method of Waterproof Coal Pillar in Sea Area——Setting Enlarged Area in Liangjia Coal Mine in Huangxian Coal Field of Shandong Province as an Example

山东省黄县煤田梁家煤矿位扩大区位于龙口湾内,水文地质条件与陆地不同,通过海域钻孔资料分析,划分出松散层及煤层和顶底板含隔水层,结合伺服试验结果进行充水因素分析,计算导水裂隙带高度和防水煤柱高度,从而合理留设防水安全煤柱,为安全采煤提供重要依据。

Liangjia coal mine in Huangxian coal field of Shandong Province lies in Longkou Bay. its hydrogeological condition is different from land. Through analysis on drilling data in this sea area,loose layers,coal seam and water resisting layers in roof and floor have been divided. Combining with the servo test results of water filling factors,guiding height of water flowing fractured zone and waterproof coal pillar height have been measured. Thus reasonably waterproof coal pillars have been remained. It will provide important basis for the safety of coal mining.