高档普采工作面使用金属背板,是加强工作面支护的一项重要技术改革,是背顶材料的更新换代,是实现回采工作面钢铁化的有效途径。我矿从1987年5月29日起在52802顶层工作面试用枣强冶炼厂试制的金属背板,开始试验148块,7月份扩大到整个工作面,共3000块,使用三个月 The use of metal backsplash in high-grade general mining face is an important technical reform to reinforce the support of working face and is the replacement of the back top material, which is an effective way to realize the steel-making of the mining face. I mine from May 29, 1987 at 52802 top job interview Zaojiang Smelter trial metal backplane, began to test 148, in July extended to the entire face, a total of 3000, the use of three months