Gold Mining: Proceedings of the International Conference on Gold Mining Technology, Beijing, China, 15-17 June 1993 |
From inside the book
Results 1-3 of 35
Page 232
... bolts with short cement - cartridge rock bolts is employed in stope mining . Cable bolt holes are drilled by using YGZ − 90 drill , with hole diameter of 55mm , and hole depth of 12M . Used hoisting rope of $ 19mm is utilized as cable ...
... bolts with short cement - cartridge rock bolts is employed in stope mining . Cable bolt holes are drilled by using YGZ − 90 drill , with hole diameter of 55mm , and hole depth of 12M . Used hoisting rope of $ 19mm is utilized as cable ...
Page 316
... bolts were installed on the roof following the face advance . Alternative 2 : roof longcables support com- bined with short bolts , were mesh and shotcrete . The clice stoping was used for the orebody with 3.5 m thick , where the roof ...
... bolts were installed on the roof following the face advance . Alternative 2 : roof longcables support com- bined with short bolts , were mesh and shotcrete . The clice stoping was used for the orebody with 3.5 m thick , where the roof ...
Page 317
... bolt can be calculated . The height of beam is the effective length of bolt . The maximum height of bed separation in the roof is the effective length of wire cable . The spacing and the row span of bolts and wire cable were checked by ...
... bolt can be calculated . The height of beam is the effective length of bolt . The maximum height of bed separation in the roof is the effective length of wire cable . The spacing and the row span of bolts and wire cable were checked by ...
Contents
Prospecting Criteria and DeepSeated Prognosis of Buried Ore in Jiapigou Gold Mining | 8 |
Update on Mining Activities on the Island of Hispaniola Dominican Republic and Haiti | 23 |
An Approach of the Geologic Genesis of Jinchanggouliang Gold Deposit Inner Mongolia | 42 |
Copyright | |
26 other sections not shown
Common terms and phrases
According alteration angle application average backfill belt blasting block body capacity carried cement China compressive concentration cost depth direction distribution district dredge drift drilling economic effect efficiency equipment exploration fault Figure flocculation formed fracture geological gold deposits gold mines grade ground higher holes important improved increase indices intensity length less load located loss lower major mass material measures mechanized method mill mineralization mining method occurred operation orebody period pillar placer present problems production prospecting Province quartz raise range ratio recovery reduced rock roof samples screen sericitic shaft shown shrinkage side slice sluice stage stope strength stress strike stripping structure surface Table tailing thickness tion trend upper various vein ventilation vertical wall zone