论文部分内容阅读
煤炭部于1987年12月25日在平顶山矿务局召开了多铰可缩U型钢支架技术鉴定会。参加会议的有煤炭部技术发展司、研究所、院校、矿务局等25个单位的40名代表。鉴定委员会由15名专家、教授、高级工程师、工程师组成。与会代表通过两天的评议、井下现场参观和审定,鉴定委员会一致认为:这种新型支架能自动调节支架的几何形状,改善了支架的受力状态。支架结构新颖、简单;轴向受压,稳定性好。耳卡式连接方法的采用,使支架的初撑恒阻性能和制造、装卸的工艺
Ministry of Coal Industry in December 25, 1987 in Pingdingshan Mining Bureau held a multi-hinge retractable U-shaped steel bracket technical appraisal. Attending the meeting were 40 representatives from 25 units of the Ministry of Coal Technology Development, research institutes, institutions and mining bureau. Appraisal Committee consists of 15 experts, professors, senior engineers, engineers. The delegates passed the two-day appraisal and visited and validated on the spot. The appraisal committee all agreed that this new type of stent can automatically adjust the geometry of the stent and improve the stress state of the stent. Bracket structure is novel and simple; axial compression, good stability. Ear card connection method used to make the initial support of the stent constant resistance performance and manufacturing, handling technology