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为了节约木材,湖南省各直属煤矿除推行了液压支柱、金属磨擦支柱、水泥支架等节约代用项目外,还与造纸厂共同研究,经反复试验,将井下回收的废坑木用做造纸的原料。从1976年以来,各煤矿共回收交造纸厂的废坑木2.8万立方米。群众说:废坑木,过去大部分是丢在井下腐烂掉了,现在把它回收出来用于造纸,这是一举三得的好事。所谓三得:一是煤矿换回了木材指标(一吨废坑木换一立方米木材),并可收回部分残值,1976年至1982年底,回收
In order to save timber, the direct coal mines in Hunan Province, in addition to the implementation of hydraulic props, metal friction props, cement support and other savings projects, but also with the paper mill joint research, after repeated tests, the mine pit waste recycling wood used as raw materials . Since 1976, all coal mines have recovered 28,000 cubic meters of waste pit and wood from paper mills. The masses said: Waste pits, which used to be mostly rotted in the well, were now recovered for papermaking. This is a good thing to do. The so-called three were: First, the mine replaced the timber index (one ton of waste pit for one cubic meter of timber), and can recover part of the salvage value, from 1976 to the end of 1982, recycling