摘要
基于地质采矿条件、水文地质及岩溶发育情况,在分析上覆岩层结构的基础上,探讨上覆岩层破坏高度、防水安全煤岩柱尺寸;评价岩溶湖及巨厚灰岩含水层下采煤的井下安全性;从移动变形角度,研究分析煤层开采后对岩溶湖的影响。结果表明:导水断裂带发育高度66.55 m,其上有P_2l^5、T_1f^(1-1)、T_1f^(2-2)隔水层存在,岩溶湖和长兴灰岩、飞仙关灰岩水不会进入井下,矿井是安全的;采动不会导致岩溶湖水位骤降,发生次生地质灾害的可能性小。因此,岩溶湖及巨厚灰岩含水层下采煤是安全可行的。
The paper, according to the geological and hydrogeological conditions as well as karst development, discusses the damage height in overlying strata and the size of water-proof coal and rock pillars based on the analysis of the structure of overlying strata. Besides, it makes analysis on mining safety under Karst lakes and thick limestone aquifer. And it also studies the influence of coal seam mining on Karst lakes from the perspective of movement and deformation. Results show that the height of water-conducting crack zone is 66.55 m, above which, there are aquifuge P2 l^5, aquifuge T1 f^（1-1） and aquifuge T1 f^（2-2）, and the water from Karst lakes as well as from limestone in Changxing and Feixianguan respectively will not go in coal mines. Therefore, working under mines is safe and will not lead to the collapse of karst water level in lake, which proves that it hardly leads to secondary geological hazards. Therefore, mining under Karst lakes and thick limestone aquifer is safe.
出处
《煤矿安全》
北大核心
2017年第10期171-173,177,共4页
Safety in Coal Mines
关键词
岩溶湖
水体下采煤
覆岩破坏
安全开采
移动变形
Karst lake
mining under water
damage of overlying strata
safety mining
movement and deformation
