鹤壁矿务局在厚及特厚煤层分层开采的工作面中,积极推广菱形金属网假顶技术,使吨煤材料费平均下降1元,获得了显著的技术经济效益,受到全国同行的好评。 针对过去分层假顶经纬网强度不高、铺网层数多、网孔尺寸不稳定、易破坏、操作困难、顶板事故多等缺点。鹤壁矿务局和煤科院唐山分院共同协作,成功地研制出了强度大、韧性、自锁性强的新型菱形金属网。并于1988年3月以来,先后在全局的综采、炮采、高档普采工作面推广。观在,全局已有9个工作面使用菱形金属网假顶,铺网面积达37.94万米~3,生产原煤175.5万吨。两年多的实践证明,这种网操作简便、安全且高效,综采万吨冒 Hebi Mining Bureau in thick and extra-thick seam stratified mining face, and actively promote the rhombic metal mesh roof technology, so that an average of 1 ton of coal material costs decreased, access to a significant technical and economic benefits, praised by national counterparts . Aiming at the shortcomings of the past hierarchical falsework latitude and longitude nets, such as the low strength, the number of overlay layers, the unstable mesh size, the easy destruction, the operation difficulties and the roof accidents. Hebi Mining Bureau and Coal Research Institute, Tangshan branch work together to successfully develop a strong, toughness, self-locking strong new diamond metal mesh. And in March 1988, has in the overall comprehensive mining, mining mining, high-grade general mining face promotion. View, the global has 9 working face using rhombic metal mesh roof, shop area of ​​379,400 meters ~ 3, producing 1.755 million tons of raw coal. More than two years of practice have proved that this kind of net operation is simple, safe and efficient, with a total capacity of 10,000 tons to take