韩家湾煤矿三盘区开采突水溃砂可能性分析

Analysis on Possibility of Water Inrush and Sand Inrush Occurred in Mining of No.3 Mining Block in Hanjiawan Mine

为了解放富水区下呆滞的煤炭资源,采用了物探、钻探和抽水试验等技术对三盘区进行了水文地质补勘,根据勘探结果得出工作面已不具备溃砂条件的结论,排除了工作面面临的溃砂威胁。同时,根据工作面涌水机理提出了"动静态水结合法"的水量预计方法,结合工作面具备的最大排水能力,确定了工作面临界突水水头高度,得出基岩风化带潜水含水层水头高度低于临界突水高度,解除了工作面面临的突水威胁。

In order to liberate the coal resources under the watery zone,the physical exploration,the drilling exploration,water pumping experiment and other technology was applied to the hydrological additional exploration in Sanpan zone.The exploration results showed that the coal mining face would not have a sand inrush condition and would not have the sand inrush danger to the coal mining face.Meanwhile,according to the water quantity prediction method of the ＂dynamic and static water combined method＂ provided with the water inrush mechanism of the coal mining face,in combination with the max water drainage capacity of the coal mining face,the water head height of the critical water inrush from the coal mining face was determined.The water head height in the aquifer of the base rock weathered zone obtained would be lower than the critical height of the water inrush.Thus the water inrush danger to the coal mining face was eliminated.