Stability Analysis of Central Haulage in Baluba Copper Mine

Gao Hui Yao; Yi Ming Wang; Kai Jian Hu

doi:10.4028/www.scientific.net/AMM.638-640.822

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 638-640Stability Analysis of Central Haulage in Baluba...

Stability Analysis of Central Haulage in Baluba Copper Mine

Abstract:

Site observations were conducted to investigate the reasons for the poor current rock-mass conditions being experienced in essential crosscuts, to provide recommendations for remedial support measures. Conceptual analyses of mining induced stresses within abutment pillars were undertaken using elastic analytical and mathematical modelling. The results showed that damage to the crosscuts is due to high mining-induced stresses, with the major stress probably acting vertically, the protection pillar for the 480 Level crosscut should be at least 100 m wide. The research demonstrated that only 2.4 m grouted rock-bolts and timber sets is not enough in these conditions, so the 480 Level and 580 Level central haulage should be re-supported with a combination of 4.0 m pre-tensioned cable-bolts, a 75 mm layer of steel mesh (or fibre) reinforced shotcrete, and even steel arch sets with lots of log.

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Periodical:

Applied Mechanics and Materials (Volumes 638-640)

Pages:

822-828

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.638-640.822

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Online since:

September 2014

Authors:

Gao Hui Yao*, Yi Ming Wang, Kai Jian Hu

Keywords:

Mechanism of Failure, Protection Pillar, Steel Arch Set, Strengthening of the Rock Mass, Support Layout

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