发明名称 Mining system
摘要 A method for extracting mineral deposits is provided. First, a predetermined surface is contour mined to expose a portion of a mineral seam and provide an insertion highwall between a pair of endwalls. Successive mining passes are made through the mineral seam to extract the mineral deposits by moving from one endwall to the other endwall. Advancement of the mining operation occurs in a direction substantially perpendicular to the insertion highwall.
申请公布号 US6916071(B2) 申请公布日期 2005.07.12
申请号 US20040801382 申请日期 2004.03.16
申请人 HARMAN JEFFREY K.;HARMAN JOEY W. 发明人 HARMAN JEFFREY K.;HARMAN JOEY W.
分类号 E21C41/16;E21C41/26;(IPC1-7):E21C37/00 主分类号 E21C41/16
代理机构 代理人
主权项
地址