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铁腿+木垛=顶板管理,这个在地方煤矿沿用多年的顶板管理模式,现在被登封县乡办三元煤矿给打破了。 近年来,为了防止冒顶事故,降低生产成本,许多地方煤矿以钢代木,采用金属支架,从而改变了木山换煤山的落后状况。但多数煤矿在采用金属支柱后,怕麻烦,不能对金属支柱定期进行防锈处理和试压,使本来有300kN支撑力的支柱锈蚀减弱到50～100kN,于是便出现了“铁腿+木垛”的演变,工作面每隔4～6m支一木垛,以此辅助铁腿支撑力。但是,由此也造成风流受阻,行人不便,运煤困难,工人违章作业,给安全生产埋下隐患。
Tiejia + woodpile = roof management, which has been used in local coal mines for many years, is now being demolished by the Sanyuan Coal Mine in Dengfeng County. In recent years, in order to prevent the accident of roof fall and reduce the production cost, many local coal mines use steel instead of metal and adopt metal brackets, thus changing the backward state of Mt. However, after most coal mines use metal pillars, they are afraid of troubles. They can not regularly conduct anti-rust treatment and pressure tests on metal pillars, so that the pillars that have 300 kN supportability have been weakened to 50 to 100 kN. Thus, the “iron leg + wood chip stack ”The evolution of the face every 4 ~ 6m support a wood stack, in order to support the iron leg support. However, this has also hindered the flow of wind, pedestrian inconvenience, coal transportation difficulties, workers illegal operations, laying a hidden danger to safety in production.