林县大众煤矿建矿四十多年来,一直沿用传统的坑木密集型支护技术,坑木消耗惊人,“七五”期间,每年的坑木耗用量已达6700立方米,坑耗费用支出200多万元。 1987年在省煤炭厅大力支持下,矿领导经过认真分析研究,算帐对比,果断地作出了应用坑代品支护巷道,逐步以钢代木的决定,并首先在鲁仙井实施。三年多时间,自筹资金和高息贷款230多万元,购进矿用工字钢1600吨,自制梯形支架8000多套,支护巷道4000余米,占原坑木支护巷道的50％。同时在回采工作面全部应用摩擦式金属支柱和单体液压支柱、铰接顶梁管理顶板新技 Over the past 40 years since its founding, the mass coal mines in Linxian County have been using the traditional pit-type intensive supporting technology. The consumption of pit pits has been staggering. During the Seventh Five-Year Plan period, the annual consumption of pit pits has reached 6,700 cubic meters, Expenditure of more than 200 million. In 1987, under the strong support of the Provincial Coal Office, the mine leaders carefully analyzed and calculated the accounts and compared decisively with the decision of using pit-substitute support tunnels and gradually taking the steel-on-wood decision. The mine was first implemented in Luxian Well. More than three years, self-financing and high-interest loans of more than 2.3 million yuan, the purchase of mining I-beam 1,600 tons, more than 8,000 sets of self-made trapezoidal stent, support lane more than 4,000 meters, accounting for the original pit supporting timber roadway 50 %. At the same time in the mining face full application of friction metal props and single hydraulic props, roof trusses articulated roof new technology