一种新型的膏体充填工艺技术

膏体充填技术作为一种将选矿尾砂排放坑内采空区并形成坚固支承体的充填技术,从20世纪80年代初期就已经在加拿大地下矿山开始使用.然而,早期的膏体充填系统设备昂贵、能耗较高,使得地下矿山最近几年来开始探求一种更经济有效的充填技术.针对这个问题,现在已经研发出一种相应的技术,它能将选矿尾砂通过沉淀、浓缩和流态化过程制出膏体.加拿大矿物能源工艺中心(CANMET)在这种新工艺的研究中所取得的成果表明,选矿尾砂能在一个尾砂仓内通过浓缩和流态过程而制成膏体用于矿山充填.     

Injury severity assessment for underground coalmine workers

An injury severity model is proposed for assessment of injury incidents in industrial settings. A classification scheme for injury incidents considering interactions is also developed. The injury severity model considers injury potential in the form of unsafe conditions and analyzes its transfer to actual injury of varying severity. A case study was conducted in an underground coalmine of eastern India. An observed reduction in risk realization is explained through the model. Presence of interactions is found to be the most significant incident attribute of injury occurrences. The classification scheme and the results obtained from this study will help in improving accident/injury investigation reporting and devising preventive measures for reducing injury severity.