Rhett Hassell

Northern Star Resources

Northern Star Resources (NSR) operates several seismically active mines as part of its Kalgoorlie Operations. In order to successfully continue mining at depth in increasing stress conditions, strategies need to be developed to reduce, control and manage the impact of seismicity causing damage to the rock mass. Consequently, a research partnership...

Northern Star Resources (NSR) operates several seismically active mines as part of its Kalgoorlie Operations. In order to successfully continue mining at depth in increasing stress conditions, strategies need to be developed to reduce, control and manage the impact of seismicity causing damage to the rock mass. Consequently, a research partnership...

An extensive Sub Level Open Stoping (SLOS) rock mass displacement monitoring program was conducted at the MMG Dugald River underground mine as part of a trial stoping program from March to December 2014. Trial stoping was conducted primarily to improve the geotechnical understanding of stope hangingwall rock mass and evaluate its response to excava...

ABSTRACT Concerns regarding the uncertainty of stope dilution at MMG Dugald River Underground Mine led to a trial stoping program to acquire full-scale comprehensive geotechnical information and to test the validity of the geotechnical and mining parameters. Given that stope production drilling and blasting is a key parameter that influences diluti...

A systematic study of ground water conditions at eight underground mine sites exhibiting a wide range of ground water qualities throughout Australia has been completed at the WA School of Mines. This has resulted in a new corrosivity classification for ground water driven corrosion processes for cement grouted cable strand used in the Australian un...

A systematic study of groundwater conditions at eight underground mine sites exhibiting a wide range of groundwater qualities throughout Australia has been completed at the WA School of Mines. This has resulted in a new corrosivity classification for groundwater driven corrosion processes for cement grouted cable strand used in the Australian under...

The effect of corrosion n the performance of rock support and reinforcement in hard rock underground mines has not been widely researched and is generally not well understood. Hence, a systematic study of ground water and atmospheric conditions at eight underground mine sites exhibiting a wide range of ground qualities throughout Australia has been...

When mining at great depth, on going time-dependent deformations or unexpected rock failures due to high stress may be experienced. In order for ground support to survive the large displacements and control the rock mass, yielding cable bolts have been developed in South Africa and Australia. Decoupling of a significant length of the strand from th...

A Corrosion Assessment System has been developed to systematically measure and record various parameters associated with the ground water and atmosphere in mines. The measurements are complemented by qualitative and quantitative assessments of the condition of reinforcement and support systems relative to their time of installation. These measureme...

The effects of corrosion upon the load bearing capacity and ultimate tensile strength of galvanised friction bolts were determined. Corrosion rates were measured by overcoring of the reinforcement elements in situ. Overcoring was achieved at several sites using a specifically designed overcoring drill rig. This rig has the capacity to drill up to 3...