矿井的延深和改扩建

Deepening, Reconstruction and expansion of the Collieries-

矿井水平延深是维持矿井简单再生产,保证生产矿井水平正常接续,持续稳产高产的必要手段。矿井改扩建是发展煤炭生产的重要途径之一。 1953～1982年,我局共生产原煤近2亿吨,除西部新建4对矿井外,主要靠原有矿井延深和改扩建及局部环节改造。

——from 1952 to 1982, Xuzhou Mining Administration has produced 200 million tons of coal, an increase mainly from reconstruction and expansion. The main features are as the following: deepening is carried out frequently in conjunction with reconstruction, and the hoisting cquipment is modified,and the lift berween levels has increased to 320m.The main and auxiliary shafts are deepened directly, and the newly-built main and auxiliary shafts and the staple shaft are used as auxiliary hoisting system, and the newly-built large diameter shaft are combined with new main belt dip headings. As a result of deepening and reconstruction, the total capacity of projects under reconstruction, including the finished projects and those ready to be reconstructed, reaches 11.55 million tons. Good techno-economic results have been obtained, the investment for reconstruction per ton of coal is 71.16 Yuan, about half of that for a new colliery.