摘要
水体下采煤是煤矿开采的难题之一。以天祝煤矿为例,在对3229工作面分阶段拟采以后,运用三维概率积分法预测地表移动变形及其对地表金沙河河床的影响。基于变形分析法预测了导水裂隙带发育高度,并与"三下"规程导水裂隙带计算高度进行比较,认为随着煤层的开采,导水裂隙带可能会破坏到中侏罗系孔隙裂隙承压含水层,预计矿井涌水量增大;第四系冲积层含水层潜水或地表河水可能通过塌陷裂隙灌入井下巷道造成淹井。在河下煤层开采时应采取措施避免河水下渗,预防井下水患。
Coal mining under the river is one of the problems. This paper,Tianzhu coal, for example, predicts the ground deformation by the use of 3D probability integral method and the influence on Jinsha River after 3229 is in phase presumed to be excavated. And then the water flowing fracture height is predicted based on deformation analysis,which is compared with that is calculated by the formula. With the mining process,water flowing fractured zone may break into fissures in the Jurassic pore confined aquifer and the mine discharge will increase,which may lead to the Quaternary alluvium aquifer water above diving or poured into the underground tunnel through the cracks caused by subsidence submergence. Measures should be taken to avoid water infiltration and to prevent underground flooding when coal mining under the river.
出处
《中国矿业》
北大核心
2012年第8期120-124,共5页
China Mining Magazine
基金
国家重点基础研究发展计划(973计划
编号:2010CB731501)
关键词
河下采煤
地表移动变形
导水裂隙带高度
三维概率积分法
mining under water
ground deformation
water flowing fractured zone
3D probability integral method
