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王庄煤矿是年产30万吨的地方国营煤矿。1975年至1982年间,由于矿井大量采用小阶段爆破的回采工艺,产量低,坑木消耗高,万吨耗一直超过200m~3以上,坑木费用在材料成本中占有很大比重。近几年来,我们依靠技术进步进行支护改革,推广使用坑代,采取多种无坑木支护形式;从管理上加强了计量考核等基础工作。提高了支护材料的回收复用率,并逐步实现了井下支护钢铁化。坑木消耗逐年降低。1983年至1987年平均为45m~3/万t;1988年为19m~3/万t;1989年1～6月又降低为8.76m~3/万t。我们的主要做法是:
Wangzhuang Coal Mine is an annual output of 300,000 tons of state-owned coal mines. From 1975 to 1982, due to the large number of small-scale blasting mining process, the production of mines was low, the consumption of pits was high, and the consumption per ton of coal exceeded 200m ~ 3. The cost of pits accounted for a large proportion of the cost of materials. In recent years, we rely on technological progress to carry out support and reform, promote the use of pit generation, and adopt a variety of non-pit-timber support forms; and strengthen the basic work of measurement and assessment from the management. Improve the recycling rate of support materials, and gradually realized the underground support steel. Pit consumption decreases year by year. From 1983 to 1987, the average was 45m ~ 3 / 10000t; in 1988 it was 19m ~ 3 / 10000t; from January to June 1989, it was reduced to 8.76m ~ 3 / 10000t. Our main approach is: