米村矿井技术改造

Technology reform of Micun Colliery

本文叙述了米村矿井主要薄弱环节的改造方式,对比分析了改造前后的经济效益。

To make full use of its shaft potential and to increase capacity from the existing 600,000 tons per annum to 1.2 million tons, it was decided to carry out a reconstruction at Micun Colliery. The reconstruction commenced in 1975 and completed in 1978. The colliery attained the goal in 1979, while in 1981 its capacity up to 1,283, 500 tons. The profit handed in was about 21,297,500 Yuan in 1979——1981 with tax 7,185, 600 Yuan, totally it was 1.44 times of capital investment (19,770,000 Yuan). The reform resulted in high efficiency with less investment. This paper described the reform method used in main weak link of shaft, analysed the economic results before and after reconstruction.