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我国普采及高档普采工作面网下采煤,使用金属铰接顶梁护顶,存在不少问题。为此,晋城矿务局对“π型钢顶梁网下护顶”方法进行了大量试验,并获得成功。从而大大改善了网下采煤的安全条件,经济效益也得到显著提高。文章总结了在使用π型钢顶梁的工作面中,它的布置形式及采煤工艺的改进所取得的经验;对采场的支护强度及其π型钢梁的适用条件也作了分析。
China’s general mining and mining of high-grade general mining face coal mining, the use of metal hinged roof beam guard, there are many problems. To this end, Jincheng Mining Bureau on the “π-beam roof support” under the method of a large number of tests and achieved success. As a result, the safety conditions for coal mining under the net have been greatly improved, and the economic benefits have also been significantly raised. The article summarizes the experience gained in the use of the π-type steel roof beam in terms of its layout and improvement of the coal mining process. The supporting strength of the stope and the applicable conditions of its π-type steel beam are also analyzed.