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山西省东南地区沁水煤田,煤层稳定,地质构造简单,倾角一般为3～5°,为近似水平煤层。现开采的煤层厚度6m左右,为优质无烟煤,其特点是:煤质坚硬,平均f=3.8,中分层高达4.4,割煤十分困难。为了改善劳动条件,提高机械化程度,提高单产,达到高效低耗,自1981年9月以来,我局古书院矿坚持在坚硬煤层中推广高档普采,到1983年2月共上三套高档普采工作面,使37.5％的采煤面改善了支护条件,40％左右的采煤工人减轻了劳动强度,并取得较好的经济效果。古书院矿1982年原煤产量达147.6万吨,创建矿以来的历史最好水平,其中两个高档面产量为40.17万吨,占全矿回采产量的30.24％。高档面月平均单产为1.76万吨,比一般普采提高28.5％;回采工效率平均为6.47吨/工,比一般普采提高40.7％;主要材料消
The Qinshui coalfield in the southeastern Shanxi Province has stable coal seam and simple geological structure with an inclination of 3 ~ 5 °, which is an approximate horizontal coal seam. Coal seam thickness is about 6m, high-quality anthracite, which is characterized by: hard coal, the average f = 3.8, up to 4.4 in the stratification, cutting coal is very difficult. In order to improve working conditions, improve mechanization, increase yields and achieve high efficiency and low consumption, since ancient times in September 1981, Gushuyuan Coal Mine in our bureau has insisted on promoting high-grade general mining in hard coal seams. By February 1983, a total of three sets of high- Mining face, so that 37.5% of the mining face improved support conditions, about 40% of the coal miners to reduce the labor intensity and achieve better economic results. The ancient academy of mining in 1982 coal production reached 1.476 million tons, the highest since the founding history of the mine, of which two high-grade surface production of 401700 tons, accounting for 30.24% of the total mining output. The average monthly yield of high-grade flour is 17,600 tons, which is 28.5% higher than that of common general mining. The average recovery efficiency of mining is 6.47 tons / worker, which is 40.7% higher than that of general mining. The main materials consumption