摘要
煤层厚度较大,放顶煤开采时其导水裂隙带发育高度大于煤层顶板到白垩系宜君组含水层底部距离,在工作面薄弱处可能波及至洛河组含水层,工作面存在顶板水害威胁。本文利用"大井法"进行工作面涌水量计算,考虑回采安全,按正常涌水量400m^3/h、最大涌水量按800m^3/h进行考虑。进行了工作面水仓,工作面排水系统的设计。
The coal seam thickness is large, the use of top coal caving mining causes the height of diversion fissure zone is larger than the distance from the coal seam roof to the aquifer bottom of Cretaceous Yijun group, in the face of weak point may spread to the Luohe aquifer, working face was threatened by roof water disaster. The working face water inflow is calculated by using the "big well method", considering the safe mining, according to the normal water inflow of 400m3/h, the maximum water inflow of 800m3/h. the drainage system of the working face and the working face sump were designed.
作者
常长生
Chang Chang-sheng(Datong zheneng Majialiang coal limited liability company, Shanxi Shuozhou 036000)
出处
《山东煤炭科技》
2017年第3期152-154,共3页
Shandong Coal Science and Technology
关键词
防治水
导水裂隙带
顶板水害
涌水量
water prevention and control
diversion fissure zone
roof water disaster
water inflow
