Guy Reed - Academia.edu (original) (raw)

Papers by Guy Reed

Research paper thumbnail of Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and areas of potential improvement

International journal of mining science and technology, 2018

Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principle... more Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and three areas of potential improvement horizontally layered roof strata and three areas of potential improvement

Research paper thumbnail of An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden

International journal of mining science and technology, 2017

Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mec... more Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal: Very specific structural geology causing a localised loss of effective coal confinement and Newton’s second law

International journal of mining science and technology, 2020

Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway dev... more Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal, very specific structural geology causing a localised loss of effective coal confinement and newtons' second law, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of Tailgate 802-GRASSTREE Mine : A Case Study in Pragmatic Roadway Roof Support Design

In February 2007 Colwell Geotechnical Services was commissioned by Anglo Coal’s Grasstree Mine (G... more In February 2007 Colwell Geotechnical Services was commissioned by Anglo Coal’s Grasstree Mine (Grasstree) in the Bowen Basin of Central Queensland to assess the future roadway serviceability and secondary roof support requirements associated with the tailgate of LW 802 (i.e. TG 802). In most instances the ALTS (Analysis of Longwall Tailgate Serviceability) Design Methodology can be directly applied to undertake such an assessment. Whilst ALTS formed the basis for the secondary roof support strategy for the vast bulk of the tailgate, there were two particular aspects associated with TG 802 that required the use other design techniques both in combination with and in addition to ALTS. Firstly, the gateroad development associated with Grasstree is based on a 3-heading rather than the typical 2heading configuration employed by Australian Collieries (upon which the ALTS database was formulated). To cater for this in assessing tailgate serviceability, ALTS was combined with its US counte...

Research paper thumbnail of A discussion on causation mechanisms for overburden bumps as distinct from coal bursts

The entire subject area of micro-seismic events due to stored strain energy, as distinct from gas... more The entire subject area of micro-seismic events due to stored strain energy, as distinct from gas-driven coal outbursts, can be readily sub-divided into firstly events with their energy source from within the coal seam (termed “bursts”) and secondly, event with their energy source outside of the coal seam in either the overburden and/or floor strata. The reason for sub-dividing micro-seismic events in this manner is that if the causation mechanisms and associated geotechnical conditions are materially different, then effective pre-mining predictions and subsequent operational controls may also differ. Attempting to explain a multitude of micro-seismic event types without consideration of varying source mechanisms will inevitably lead to inadequate causal explanations and effective controls. The paper outlines several different causal mechanisms for bumps emanating from both the overburden and/or floor of a coal seam by reference to both theoretical treatments and known associated ca...

Research paper thumbnail of A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal: Very specific structural geology causing a localised loss of effective coal confinement and Newton’s second law

International Journal of Mining Science and Technology, 2020

Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway dev... more Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal, very specific structural geology causing a localised loss of effective coal confinement and newtons' second law, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of Limitations and potential design risks when applying empirically derived coal pillar strength equations to real-life mine stability problems

International Journal of Mining Science and Technology, 2018

Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-... more Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-derived coal pillar strength equations to real-life mine stability problems, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of Coal pillar design when considered a reinforcement problem rather than a suspension problem

International Journal of Mining Science and Technology, 2018

Current coal pillar design is the epitome of suspension design. In principle, this is seemingly n... more Current coal pillar design is the epitome of suspension design. In principle, this is seemingly no different from early roadway roof support design. However, for the most part, roadway roof stabilisation has progressed to reinforcement, whereby the roof strata is assisted in supporting itself. Suspension and reinforcement are fundamentally different and, importantly, lead to substantially different requirements in terms of roof support hardware characteristics and their application. This paper presents a prototype coal pillar and overburden system representation where reinforcement, rather than suspension, of the overburden is the stabilising mechanism via the action of in situ horizontal stresses within the overburden, the suspension problem potentially being an exception rather than the rule, as is also the case in roadway roof stability. Established principles relating to roadway roof reinforcement can potentially be applied to coal pillar design under this representation. The merit of this assertion is evaluated according to documented failed pillar cases in a range of mining applications and industries found in a series of published databases. Based on the various findings, a series of coal pillar system design considerations and suggestions for bord and pillar type mine workings are provided. This potentially allows a more flexible and informed approach to coal pillar sizing within workable mining layouts, as compared with common industry practices of a single design Factor of Safety (FoS) under defined overburden dead-loading to the exclusion of other potentially relevant overburden stabilising influences.

Research paper thumbnail of Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and areas of potential improvement

International Journal of Mining Science and Technology, 2018

Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principle... more Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and three areas of potential improvement horizontally layered roof strata and three areas of potential improvement

Research paper thumbnail of An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden

International Journal of Mining Science and Technology, 2017

Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mec... more Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of The borehole sleeving test method of resin anchored roof bolt instalations

Resin anchored roof bolts are the basis for the primary roof support system of every underground ... more Resin anchored roof bolts are the basis for the primary roof support system of every underground coal mine in Australia. However, the negative influences of uncured resin and resin loss due to installation pressure are common problems despite more than 30 years of product development. The current study details a surface testing method that installs a commonly used roof bolt into lengths of PVC pipe. Results were gathered in two ways, instrumentation measured bolt displacement and rotation speed and back-pressure during installation. The PVC was then cut open to assess the quality of the resin anchor. Comparative testing was undertaken on two resin cartridges commonly used in Australia: 2:1 mastic-to-catalyst resin and 15:1 mastic-to-catalyst resin. The tests were performed in 28 mm and 30 mm internal diameter PVC pipes to simulate a range of underground roof conditions. Data analysis shows the influence of borehole diameter, mastic-to-catalyst ratio and insertion pressure development on resin anchor reliability.

Research paper thumbnail of Limitations and potential design risks when applying empirically derived coal pillar strength equations to real-life mine stability problems

International journal of mining science and technology, 2019

Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-... more Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-derived coal pillar strength equations to real-life mine stability problems, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and areas of potential improvement

International journal of mining science and technology, 2018

Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principle... more Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and three areas of potential improvement horizontally layered roof strata and three areas of potential improvement

Research paper thumbnail of An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden

International journal of mining science and technology, 2017

Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mec... more Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal: Very specific structural geology causing a localised loss of effective coal confinement and Newton’s second law

International journal of mining science and technology, 2020

Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway dev... more Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal, very specific structural geology causing a localised loss of effective coal confinement and newtons' second law, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of Tailgate 802-GRASSTREE Mine : A Case Study in Pragmatic Roadway Roof Support Design

In February 2007 Colwell Geotechnical Services was commissioned by Anglo Coal’s Grasstree Mine (G... more In February 2007 Colwell Geotechnical Services was commissioned by Anglo Coal’s Grasstree Mine (Grasstree) in the Bowen Basin of Central Queensland to assess the future roadway serviceability and secondary roof support requirements associated with the tailgate of LW 802 (i.e. TG 802). In most instances the ALTS (Analysis of Longwall Tailgate Serviceability) Design Methodology can be directly applied to undertake such an assessment. Whilst ALTS formed the basis for the secondary roof support strategy for the vast bulk of the tailgate, there were two particular aspects associated with TG 802 that required the use other design techniques both in combination with and in addition to ALTS. Firstly, the gateroad development associated with Grasstree is based on a 3-heading rather than the typical 2heading configuration employed by Australian Collieries (upon which the ALTS database was formulated). To cater for this in assessing tailgate serviceability, ALTS was combined with its US counte...

Research paper thumbnail of A discussion on causation mechanisms for overburden bumps as distinct from coal bursts

The entire subject area of micro-seismic events due to stored strain energy, as distinct from gas... more The entire subject area of micro-seismic events due to stored strain energy, as distinct from gas-driven coal outbursts, can be readily sub-divided into firstly events with their energy source from within the coal seam (termed “bursts”) and secondly, event with their energy source outside of the coal seam in either the overburden and/or floor strata. The reason for sub-dividing micro-seismic events in this manner is that if the causation mechanisms and associated geotechnical conditions are materially different, then effective pre-mining predictions and subsequent operational controls may also differ. Attempting to explain a multitude of micro-seismic event types without consideration of varying source mechanisms will inevitably lead to inadequate causal explanations and effective controls. The paper outlines several different causal mechanisms for bumps emanating from both the overburden and/or floor of a coal seam by reference to both theoretical treatments and known associated ca...

Research paper thumbnail of A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal: Very specific structural geology causing a localised loss of effective coal confinement and Newton’s second law

International Journal of Mining Science and Technology, 2020

Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway dev... more Russell Frith, Guy Reed and Aaron Jones, A causation mechanism for coal bursts during roadway development based on the major horizontal stress in coal, very specific structural geology causing a localised loss of effective coal confinement and newtons' second law, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of Limitations and potential design risks when applying empirically derived coal pillar strength equations to real-life mine stability problems

International Journal of Mining Science and Technology, 2018

Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-... more Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-derived coal pillar strength equations to real-life mine stability problems, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of Coal pillar design when considered a reinforcement problem rather than a suspension problem

International Journal of Mining Science and Technology, 2018

Current coal pillar design is the epitome of suspension design. In principle, this is seemingly n... more Current coal pillar design is the epitome of suspension design. In principle, this is seemingly no different from early roadway roof support design. However, for the most part, roadway roof stabilisation has progressed to reinforcement, whereby the roof strata is assisted in supporting itself. Suspension and reinforcement are fundamentally different and, importantly, lead to substantially different requirements in terms of roof support hardware characteristics and their application. This paper presents a prototype coal pillar and overburden system representation where reinforcement, rather than suspension, of the overburden is the stabilising mechanism via the action of in situ horizontal stresses within the overburden, the suspension problem potentially being an exception rather than the rule, as is also the case in roadway roof stability. Established principles relating to roadway roof reinforcement can potentially be applied to coal pillar design under this representation. The merit of this assertion is evaluated according to documented failed pillar cases in a range of mining applications and industries found in a series of published databases. Based on the various findings, a series of coal pillar system design considerations and suggestions for bord and pillar type mine workings are provided. This potentially allows a more flexible and informed approach to coal pillar sizing within workable mining layouts, as compared with common industry practices of a single design Factor of Safety (FoS) under defined overburden dead-loading to the exclusion of other potentially relevant overburden stabilising influences.

Research paper thumbnail of Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and areas of potential improvement

International Journal of Mining Science and Technology, 2018

Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principle... more Fundamental principles of an effective reinforcing roof bolting strategy in Fundamental principles of an effective reinforcing roof bolting strategy in horizontally layered roof strata and three areas of potential improvement horizontally layered roof strata and three areas of potential improvement

Research paper thumbnail of An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden

International Journal of Mining Science and Technology, 2017

Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mec... more Guy Reed and Russell Frith, An assessment of coal pillar system stability criteria based on a mechanistic evaluation of the interaction between coal pillars and the overburden, in Naj Aziz and Bob Kininmonth (eds.

Research paper thumbnail of The borehole sleeving test method of resin anchored roof bolt instalations

Resin anchored roof bolts are the basis for the primary roof support system of every underground ... more Resin anchored roof bolts are the basis for the primary roof support system of every underground coal mine in Australia. However, the negative influences of uncured resin and resin loss due to installation pressure are common problems despite more than 30 years of product development. The current study details a surface testing method that installs a commonly used roof bolt into lengths of PVC pipe. Results were gathered in two ways, instrumentation measured bolt displacement and rotation speed and back-pressure during installation. The PVC was then cut open to assess the quality of the resin anchor. Comparative testing was undertaken on two resin cartridges commonly used in Australia: 2:1 mastic-to-catalyst resin and 15:1 mastic-to-catalyst resin. The tests were performed in 28 mm and 30 mm internal diameter PVC pipes to simulate a range of underground roof conditions. Data analysis shows the influence of borehole diameter, mastic-to-catalyst ratio and insertion pressure development on resin anchor reliability.

Research paper thumbnail of Limitations and potential design risks when applying empirically derived coal pillar strength equations to real-life mine stability problems

International journal of mining science and technology, 2019

Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-... more Russell Frith and Guy Reed, The limitations and potential design risks when applying empirically-derived coal pillar strength equations to real-life mine stability problems, in Naj Aziz and Bob Kininmonth (eds.