论文部分内容阅读
我们孙村矿是一个已开采70余年的老矿,1948年接收后一直是边生产,边改造。1953年扩建为年产能力45万吨,1962年延深水平,核定年产能力为60万吨,1980年又核定年产能力为75万吨,去年实产原煤92.95万吨。矿井力斜井多水平中央石门开拓,中央并列式通风,煤层群分组联合布置,集中运输,走向长壁式采煤,冒落法管理顶板,一
Our Suncun mine is an old mine that has been mined for more than 70 years. After its reception in 1948, it has been producing while rebuilding. Expanded in 1953 to an annual output capacity of 450,000 tons, 1962, the level of delay, the approved annual capacity of 600,000 tons, in 1980 approved an annual production capacity of 750,000 tons last year, the actual production of 929,500 tons of raw coal. Mine shaft inclined horizontal multi-level central stone gate to open up, the central side-by-side ventilation, coal seam grouping joint arrangement, centralized transportation, to the long-wall coal mining, roof management law,