Underground mine stream crossing assessment:A multi-disciplinary approach

作     者：Kevin Andrews Steve Keim Kevin Andrews;Steve Keim

作者机构：Marshall Miller&AssociatesBluefieldVA 24605USA 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2021年第31卷第1期

页      面：59-65页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：The content for this paper was compiled and used over the course of decades by a team of Marshall Miller&Associates professional geologists and engineers.These individuals include Gerry Enigk(Mining Engineer) John Feddock(Mining Engineer) Scott Keim(Geologist) Ron Mullennex(Hydrogeologist) Scott Nelson(Geologist) and Mark Smith(Hydrogeologist and Downhole Logging Geophysicist).The practical knowledge has been passed on to the authors through project work and hands-on experience 

主　　题：Underground mining Geotechnical Stream-crossing Hydrogeology Characterization 

摘      要：Underground mine designs typically try to avoid extraction beneath streams and rivers of any significant size,especially when the overburden rock thickness between the stream bed and the mine is *** issues with mining beneath streams include excessive groundwater inflow to the mine,weak ground(roof,floor,and pillar)conditions,horizontal stress effects,as well as stream loss and other potential adverse environmental ***,there are times when crossing beneath a stream or river is necessary to move into a new area of mineral reserve without creating additional mine access points from the ground ***,stream crossings are completed without thorough assessment,potentially resulting in increased costs,decreased safety,and,in some cases,failure to advance the *** of the most favorable location(s)to cross the stream must account for numerous factors and the associated assessment often requires a multi-disciplinary *** crossing investigations often require geological,hydrogeological,geotechnical,and geophysical *** of stream crossing investigations include desktop evaluation of maps and aerial photography,stream bed observations,drilling,detailed rock core logging,downhole geophysical surveying,hydraulic conductivity testing(packer testing),geotechnical laboratory testing,assessment,and *** deliverables from a stream crossing assessment typically include geological,geotechnical,and hydrogeological characterization of potential stream crossing locations,classification of favorable and unfavorable crossing locations,recommendations for entry design and pillar sizing,and recommendations for if,and how,to conduct pre-grouting *** of technical aspects of data collection and assessment are provided based on decades of industry experience conducting stream crossing assessments in various underground mining scenarios.