摘要 :
Mine gas control is a major issue for most gassy underground coal mines due to its direct impact on safety, and the cost of production. Analysis of the gas data from different collieries in Australia showed that longwall gas emiss...
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Mine gas control is a major issue for most gassy underground coal mines due to its direct impact on safety, and the cost of production. Analysis of the gas data from different collieries in Australia showed that longwall gas emissions have increased substantially over the years. A range of coal mine gas drainage techniques are practised in Australian underground coal mines, these include cross-measure boreholes, in-seam and surface directional drilling boreholes and surface goaf holes, which are increasing used in Australia. The use of coal mine methane (CMM) and ventilation air methane (VAM) is becoming appealing for both environmental and economical benefits and as such innovative technologies are being developed to utilise this valuable resource. This paper summarizes some of the core capabilities at Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) that can be deployed for coal mine gas capture and utilisation projects. These include advanced goaf gas flow characterisation techniques, Computational Fluid Dynamics (CFD) modelling and a new coupled geomechanical-gas flow simulation software, COSFLOW, jointly developed by CSIRO, the New Energy and Industrial Technology Development Organization (NEDO), and the Japan Coal Energy Centre (JCOAL), of Japan. Applications of these technologies for the development of effective mine gas control strategies are demonstrated in three Australian gassy coal mines and major results reported here. This paper also briefly introduces the innovative Medium Radius Drilling (MRD) technology for CBM/CMM and a range of gas utilisation technologies, including the lean-burn gas turbines devised by CSIRO.
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摘要 :
Mine gas control is a major issue for most gassy underground coal mines due to its direct impact on safety, and the cost of production. Analysis of the gas data from different collieries in Australia showed that longwall gas emiss...
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Mine gas control is a major issue for most gassy underground coal mines due to its direct impact on safety, and the cost of production. Analysis of the gas data from different collieries in Australia showed that longwall gas emissions have increased substantially over the years. A range of coal mine gas drainage techniques are practised in Australian underground coal mines, these include cross-measure boreholes, in-seam and surface directional drilling boreholes and surface goaf holes, which are increasing used in Australia. The use of coal mine methane (CMM) and ventilation air methane (VAM) is becoming appealing for both environmental and economical benefits and as such innovative technologies are being developed to utilise this valuable resource. This paper summarizes some of the core capabilities at Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) that can be deployed for coal mine gas capture and utilisation projects. These include advanced goaf gas flow characterisation techniques, Computational Fluid Dynamics (CFD) modelling and a new coupled geomechanical-gas flow simulation software, COSFLOW, jointly developed by CSIRO, the New Energy and Industrial Technology Development Organization (NEDO), and the Japan Coal Energy Centre (JCOAL), of Japan. Applications of these technologies for the development of effective mine gas control strategies are demonstrated in three Australian gassy coal mines and major results reported here. This paper also briefly introduces the innovative Medium Radius Drilling (MRD) technology for CBM/CMM and a range of gas utilisation technologies, including the lean-burn gas turbines devised by CSIRO.
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摘要 :
Management of stripped soil and rock above the target seam during open pit mining is one of the issues to successfully operate any open cast mine. Instabilities of the dumped overburden can cause various problems in surface mining...
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Management of stripped soil and rock above the target seam during open pit mining is one of the issues to successfully operate any open cast mine. Instabilities of the dumped overburden can cause various problems in surface mining. In-pit overburden dumps minimize material handling but instability can directly impact mining, while failures in out of pit dumps can have a lesser, but still significant impact on operations. Recently, failure of an out of pit overburden dump at an Indian Colliery was witnessed. The failed overburden dump impacted on neighboring amenities and displaced approximately 70 meters away from the original location of the dump toe. This paper discusses the probable mechanism of this failure.
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