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由北京煤矿机械厂研制的“七五”科技攻关项目Bc7A 400-17/35型支撑掩护式机械化铺联网液压支架最近在山西晋城古书院煤矿通过部级初步鉴定。该支架初撑力3078kN,工作阻力3920kN,不带防倒防滑装置适应煤层倾角15°、5m以上的中厚煤层及Ⅰ、Ⅱ级顶板条件下的上分层综采,假顶采用8~*-12~*镀锌铁丝方格网或塑料网。
The “Seventh Five-Year Plan” scientific research project developed by Beijing Coal Mining Machinery Plant Bc7A 400-17 / 35-type support screening mechanized hydraulic network support network has been recently appraised at the ministerial level by the Gushuyuan Coal Mine in Jincheng, Shanxi Province. The support initial support force 3078kN, work resistance 3920kN, without anti-skid device to adapt to coal seam dip angle of 15 °, 5m above the thick coal seam and Ⅰ, Ⅱ level under the conditions of the upper stratified mining, roof top 8 ~ -12 ~ * galvanized iron wire mesh or plastic mesh.