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鹤壁矿务局在四矿-250米水平峒室群加固的技术试验中,首次把国内外大型地下工程的最新支护技术——预应力锚索运用于煤矿峒室的加固,获得了圆满的成功。 该试验由鹤壁局科研所、四矿、煤科院建井所、焦作矿院、89002部队等单位协同攻关、课题组由矿务局总工程师郑子英负责。1984年初,四矿采掘失调,为此,提出开发-250峒室群上覆煤层。但峒室加固问题难以解决,他们决定采用预应力锚索,
Hebi Mining Bureau in the 450 meters horizontal mound chamber group reinforcement technology test, the first large-scale underground engineering at home and abroad for the first time supporting the use of technology - prestressed anchor cable used in the reinforcement of coal mines, access to a successful success. The test by the Hebi Bureau of scientific research, four mines, Coal Research Institute built coal wells, Jiaozuo Mining, 89002 units and other units collaborative work, the task force by the Chief Engineer Zheng Ziying Mining Bureau is responsible. In early 1984, the fourth mining excavated disorders, therefore, proposed development -250 峒 room overlying coal seam. However, 峒 room reinforcement problems difficult to solve, they decided to use prestressed anchor cable,