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深井矿山充填钻孔失效分析及预防措施熊有为摘 要:作为深井矿山充填系统的咽喉工程,充填钻孔失效将严重影响矿山的正常生产.通过分析充填钻孔不同结构形式,提出了钻孔堵塞和磨损失效模式及其原因;分析深井充填系统管道内料浆在不同状态下运动特征,明确了非满管流输送是引起钻孔和管道磨损的主要原因;提出闭路满管输送,管路布置优化,小管径增阻减磨以及破损钻孔修复等预防钻孔失效的技术措施,保证矿山安全高效生产.关键词:深井矿山;充填钻孔;堵塞;磨损;满管输送;空气柱;......
深井矿山充填体强度分布规律研究尹裕1,2,杨家冕1,2,肖益盖1,21. 中钢集团马鞍山矿山研究院有限公司2. 金属矿山安全与健康国家重点实验室摘 要:针对深井矿山采场充填的实际情况,充填料浆复杂的流动沉积及离析作用,致使充填体表现出极大强度分布的不均匀性.为此,进行了实验室尾砂胶结充填模拟试验,研究原位充填体的强度与实验室标准试块强度的差异,得出了采场尾砂胶结充填体强度分布规律.在此基础上,对采场充填体强度分布划分为强度增强区和强度减弱区,可改进二步骤回采的深井矿山采场充填管路布置方式,以指导矿山生产实践......
Instruments (Shanghai) Ltd, Shanghai 201109, China Received 16 August 2010; accepted 17 November 2010 Abstract: Fine gauge extruded aluminium alloy tubes can experience preferential corrosion and early... to pitting by removing noble Mn from solid solution. Such an effect was not observed for the low-Mn alloy. Key words: cold deformation; Mn precipitation; aluminium tube alloy 1 Introduction......
and subgrain size is similar to that observed in 3xxx series alloys and can be described by the specific set of equations derived. Key words: aluminium alloy; texture; Zener-Hollomon parameter... nucleation (PSN) in 3xxx and 5xxx series alloys increases with an increase in Z-H parameter values. Additionally, higher parameter values lead to decrease in cube texture survival [38-40] during......
, the application of the AZ series magnesium alloys is still limited owing to its limited strength and lower corrosion resistance as compared with the aluminium alloys [5]. It is well known... [6-8,17-24]. However, the controversial views on the role of Al for the corrosion of AZ series magnesium alloy still exist. According to some researchers [17,18], the corrosion resistance of magnesium......
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200030, China) Abstract: In order to exactly evaluate drawability of automotive aluminum alloy sheets, the correlation between material properties and formability of automotive aluminium alloy sheets... to evaluate drawability of automotive aluminium alloy sheets by means of the values of xb. Key words: aluminium alloy sheet; drawability; evaluation parameter; regression analysis 近20年来, 世界性的能源危机和环境污染问......
Characteristics of Fatigue in a SiC Reinforced Aluminium Alloy于维成,袁金才,王中光,隋全武摘 要:<正> 1.IntroductionMetal matrix composite materials exhibitquite a good combination of strength andstiffness of the reinforcing phase withductility and toughness of the matrix.Aluminium alloys reinforced with SiC parti-cles and whiskers are receiving a greatdeal......
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