n.井筒
The paper analyzed the geological and hydrological features of Jvye coal field, discussed the relative merits of various mineshaft construction method at surface-soil section in use. 分析了巨野煤田地质、水文特点,讨论了表土段井筒施工的各种现有方法的优缺点。
The flooding of a mineshaft in central China's Henan province Friday was the latest in a string of environmental and industrial disasters that have highlighted the country's infrastructure problems. 中国的环保及工业灾难频传，中部河南省星期五的矿井透水事件只是再添一例而已，这突显中国基础建设出现重大的问题。
The horizontal arrangement of floor type frictional sheave mineshaft bunton 落地式摩擦轮井筒罐道梁卧放布置
Air-cooling Technology in the Construction of Mineshaft Threatened by Heat 受热害威胁矿井井筒施工降温技术
Keywords mineshaft;cnti-well driller;accumulative level;basic rock section; 矿井;反井钻机;冲积层;基岩段;
