基建矿井岩溶突水机理和防治

Karst Water Inrush Mechanism and Prevention in Construction Mines

一、岩溶突水矿井突水,以喀斯特岩溶突水危害最大。峰峰一矿、焦作演马庄矿和最近开滦范各庄矿的岩溶突水,都淹没了矿井。基建矿井的岩溶突水也时有发生,现就四川省发生的突水如下: 例1 红岩煤矿位于盆地东南缘,龙骨溪大背斜西北翼一段,南接娄山褶皱。

From 7 Karst water inrush cases occoured in Sichuan coalmines, such as Hongyan Mine, Fengchun Mine, Shihao Mine, Zhongliangshan Mine and et al, it found that all inrushes were occoured at a rift belt. Those inrushes at an initial time were high in water pressure, quantity and potential energy, and sometime with mudy sand and rock blocks. A Ksrst water inrush was closely related with water recharged by surface rain and river. Therefore, an early treatment and stream blockage should be conducted at a potential water inrush area. A formation of Karst is due to carbon dio xide and limestone in water and air which have been slowly changed for a long time. Also due to geological structures and water recirculation, it formed karst cave with a large area and wounderfull view. Therefore, before a mine construction started, a geogical exploration for karst rock and water must be conducted. A special attention should be paid to the such design and construction. Based on water resource, water inrush point, flowing water channel and water drainage form and capacity, a water prevention plan should be given a special attention to prevent a water inrush. For any geology point which is not clear yet, a drilling programe should be conducted. To seal off a running water stream which is near up to surface ground, those water would be drained out throught a uplevel tumnl. For a deeper mine, a sufficient drainage equipment should be arranged. During a mine cosstruction period, it is possible to seal wate and a grouting method will be a maior one wherever a wate stream is needed to seal off.