Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research
A Practical Approach to the Determination of Outburst Thresholds. / Gray, Ian; Shelukhina, Iuliia; Wood, Jeff.
Proceedings of the 16th Coal Operators' Conference, Mining Engineering, University of Wollongong, 10-12 February 2016. University of Wollongong, 2016. p. 330-346.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research
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TY - GEN
T1 - A Practical Approach to the Determination of Outburst Thresholds
AU - Gray, Ian
AU - Shelukhina, Iuliia
AU - Wood, Jeff
PY - 2016
Y1 - 2016
N2 - The current Australian reliance on gas content and DRI index used in Outburst Management Plans leads, in many cases, to an ultra-conservative approach to coal mine development. It is also contrary to overseas practice where other factors are taken into account. Outbursts must start with failure and that failure must produce fragments. It is therefore a process of fragmenting failure. For this to occur the coal must have some pre-existing structure within it. Determining whether a fragmenting failure will take place is dependent on the effective stress within the coal and the strength of the coal. Thus determining the strength of the coal and the structure within it are paramount, both on the small and large scales. A key element in the effective stress equation is the gas pressure. Once failure has occurred the question is whether that failure takes place with sufficient energy to provide a serious risk? The energy comes from gravitational effects, strain energy and expanding gas.
AB - The current Australian reliance on gas content and DRI index used in Outburst Management Plans leads, in many cases, to an ultra-conservative approach to coal mine development. It is also contrary to overseas practice where other factors are taken into account. Outbursts must start with failure and that failure must produce fragments. It is therefore a process of fragmenting failure. For this to occur the coal must have some pre-existing structure within it. Determining whether a fragmenting failure will take place is dependent on the effective stress within the coal and the strength of the coal. Thus determining the strength of the coal and the structure within it are paramount, both on the small and large scales. A key element in the effective stress equation is the gas pressure. Once failure has occurred the question is whether that failure takes place with sufficient energy to provide a serious risk? The energy comes from gravitational effects, strain energy and expanding gas.
M3 - Conference contribution
SP - 330
EP - 346
BT - Proceedings of the 16th Coal Operators' Conference, Mining Engineering, University of Wollongong, 10-12 February 2016
PB - University of Wollongong
T2 - Coal Operators Conference
Y2 - 10 February 2016 through 12 February 2016
ER -
ID: 7600629