A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Stabilization of Abandoned Coal Mines for a Motorway Upgrade, Queensland, Australia
The upgrade of Queensland's busiest Motorway involved realignment of the motorway corridor over three separate abandoned coal mines each mined at different times with different pillar characteristics and varied availability and confidence of mapped mine geometry. Analysis of the mine pillars indicated potential instability that could impact the serviceability of the motorway, and filling of sections of the mine underlying the proposed route was adopted as the best long term solution. Worked mine seams of between 1.0 m and 7.5 m in height were filled using a flyash and cement based paste. The paste filling operation required groundwater to be pumped from the flooded mine void to balance the paste being pumped in to ensure the local and regional hydrogeology was not affected. Two of the mines were dry but presented significant safety challenges due to the high methane levels. This paper presents the challenges faced and solutions adopted by the project team in implementing Australia's largest and most complex abandoned mine void filling scheme.
Stabilization of Abandoned Coal Mines for a Motorway Upgrade, Queensland, Australia
The upgrade of Queensland's busiest Motorway involved realignment of the motorway corridor over three separate abandoned coal mines each mined at different times with different pillar characteristics and varied availability and confidence of mapped mine geometry. Analysis of the mine pillars indicated potential instability that could impact the serviceability of the motorway, and filling of sections of the mine underlying the proposed route was adopted as the best long term solution. Worked mine seams of between 1.0 m and 7.5 m in height were filled using a flyash and cement based paste. The paste filling operation required groundwater to be pumped from the flooded mine void to balance the paste being pumped in to ensure the local and regional hydrogeology was not affected. Two of the mines were dry but presented significant safety challenges due to the high methane levels. This paper presents the challenges faced and solutions adopted by the project team in implementing Australia's largest and most complex abandoned mine void filling scheme.
Stabilization of Abandoned Coal Mines for a Motorway Upgrade, Queensland, Australia
Holz, Bill (author) / Batchelor, Oliver (author)
Proceedings of the Fourth International Conference on Grouting and Deep Mixing ; 2012 ; New Orleans, Louisiana, United States
Grouting and Deep Mixing 2012 ; 1912-1923
2012-08-17
Conference paper
Electronic Resource
English
Grouting , Highways and roads , Chemical grouting , Anchors , Cement , Cutoffs , Piles , Mixing , Coal , Mining , Soil stabilization , Australia , Foundations , Hydraulic structures
Stabilization of Abandoned Coal Mines for a Motorway Upgrade: Queensland, Australia
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