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目前,我国煤炭资源回收率一般在50%以下,造成资源的极大浪费。例如,开滦徐家楼矿,自1973年投产以来,矿井总的资源回收率仅为47.8%,损失煤量达3415.86万吨。鹤岗新一矿,一水平回采率仅为35.9%。由于回收率低,致使开采水平的服务年限由原来的16.5年缩短为7.2年(为原来的43.6%)。铜川的东背塔平峒,1969年投产时,设计服务年限为35年,但是,由于矿井总的回收率低,十来年的开采已动用了全部储量的45%,致使服务年限减少15年。
At present, the recovery rate of coal resources in China is generally below 50%, resulting in a great waste of resources. For example, Kailuan Xujialou Mine, since put into operation in 1973, the mine’s total resource recovery rate was only 47.8%, the loss of coal amounted to 34,158,600 tons. Hegang a new mine, a level of recovery rate was only 35.9%. Due to the low recovery rate, the service life at the mining level has been shortened from 16.5 years to 7.2 years (43.6% of the original). Tongchuan’s east back tower was built in 1969 and has a design service life of 35 years. However, due to the low total recovery rate of mines, mining has taken 45% of the total reserves over a period of 10 years and the service life has been reduced by 15 years.