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Surface Goaf Hole Drainage Trials At Illawarra Coal, T. Meyer
Surface Goaf Hole Drainage Trials At Illawarra Coal, T. Meyer
Resource Operators Conference
Surface goaf gas extraction methods are successfully applied at a number of Australian and overseas underground coal mines. BHPB Illawarra Coal has recently undertaken a trial program to determine the effectiveness of surface goaf wells to reduce gas concentrations within the longwall ventilation circuit, and minimise gas related production delays. Three trial wells have been completed within the Bulli Seam operations. Considerable production variation between the three wells was recorded. A goaf gas reservoir model is discussed which describes a sequence of permeability changes within the different goaf strata, dictated by stress changes associated with caving, then recompaction. A requirement …
Bolt Surface Configurations And Load Transfer Mechanism, N. Aziz, H. Jalaifar, J. Concalves
Bolt Surface Configurations And Load Transfer Mechanism, N. Aziz, H. Jalaifar, J. Concalves
Resource Operators Conference
A series of laboratory based push and pull tests were carried out to investigate how surface profile influence the load transfer mechanism of bolt/resin interface. Tests were carried out in both 75 mm and 150 mm long steel sleeves. Three types of bolts were examined, they were bolts most commonly used for strata reinforcements in underground coal mines in Australia. The bolts had near equal core diameter but of different profile configurations. The change in the length of the encapsulation sleeve was examined in light of the small number of profiles encapsulated effectively in short 75 mm long sleeves. The …
A Laboratory Facility To Study The Behaviour Of Reinforced Elements Subjected To Shear, L. Mahony, P. Hagan
A Laboratory Facility To Study The Behaviour Of Reinforced Elements Subjected To Shear, L. Mahony, P. Hagan
Resource Operators Conference
This paper outlines the design, construction, commissioning and subsequent investigation of a shear test laboratory facility at the University of New South Wales (UNSW). The facility was developed with the financial support of ACARP to understand the impact of shear loading conditions on the performance of reinforcement elements such as rockbolts and cablebolts. While it is acknowledged that shear loading commonly occurs, progress towards a better understanding of its impact has been limited due to issues in modelling behaviour. Preliminary testwork indicates that many of these issues have been overcome in the design of the current facility. The facility is …
High-Resolution Topographic Data For Subsidence Impact Assessment And Smp Preparation: Methods And Considerations, Daniel R. Palamara, G. Brassington, Phil Flentje, Ernest Baafi
High-Resolution Topographic Data For Subsidence Impact Assessment And Smp Preparation: Methods And Considerations, Daniel R. Palamara, G. Brassington, Phil Flentje, Ernest Baafi
Resource Operators Conference
Corporate and social requirements relating to sustainable mining practices have resulted in an increasing need for identification and assessment of natural features that may be susceptible to coalmine-induced subsidence. Natural features such as, cliff lines, watercourses and steep slopes, that are typically susceptible to subsidence-induced impacts can often be identified and quantified using high-resolution topographic data and a geographic information system (GIS). Once identified, digital representations of these features can be used in the impact assessment process and for Subsidence Management Plan (SMP) preparation. This paper demonstrates the use of topographic data for site characterisation and feature identification purposes by …
A Case Study On Longwall Mining Under The Tidal Waters Of Lake Macquarie, G. Li, I. Forster, M. Fellowes, A. Myors
A Case Study On Longwall Mining Under The Tidal Waters Of Lake Macquarie, G. Li, I. Forster, M. Fellowes, A. Myors
Resource Operators Conference
This article presents a case study of longwall mining under the tidal waters of Lake Macquarie, south of Newcastle, NSW. The mining operation took place at the Wyee Colliery from 1998 to 2002, without any incidence of ingress of water from the lake. This paper describes i) the design strategy used for a viable and robust mine layout that minimises the risk of water ingress ii) observations made during the operational phase and iii) a practical tool for designing underground coal mines under surface water bodies.
Monitoring Of Subsidence Movements At Major Infrastructure, J. Barbato, D. Kay, H. Pinkster, B. De Somer
Monitoring Of Subsidence Movements At Major Infrastructure, J. Barbato, D. Kay, H. Pinkster, B. De Somer
Resource Operators Conference
Time based mine subsidence predictions provide a valuable tool, as part of an overall management strategy to protect infrastructure, which involves making subsidence predictions at set increments of longwall travel. The predictions can be presented as a series of subsidence contours or profiles, and can be animated to show the progression of the subsidence travelling wave. The observed movements at major items of infrastructure can then be compared to the predicted movements at any time throughout the mining period. The challenges in providing time based predictions are discussed. Two examples are provided: the Main Southern Railway at Tahmoor Colliery and …
Impacts Of Longwall Mining To Rivers And Cliffs In The Southern Coalfield, D. Kay, J. Barbato, G. Brassington, B. De Somer
Impacts Of Longwall Mining To Rivers And Cliffs In The Southern Coalfield, D. Kay, J. Barbato, G. Brassington, B. De Somer
Resource Operators Conference
Extraction of coal using longwall mining techniques causes subsidence which has potential to affect surface features, including environmentally sensitive areas such as rivers and cliffs. There are currently a number of proposed extensions to coal mining operations in the Southern Coalfield of New South Wales that are seeking to mine close to rivers and cliffs. These proposals have attracted some community concern at a local and regional level. This concern is largely founded on impacts that have occurred as a result of previous mining activities, the majority of which occurred directly beneath the impacted sites. It was therefore considered a …
Management Of Impacts Of Longwall Mining Under Urban Areas, D. Kay, A. Waddington, J. Page, B. De Somer
Management Of Impacts Of Longwall Mining Under Urban Areas, D. Kay, A. Waddington, J. Page, B. De Somer
Resource Operators Conference
Current and proposed expansions to existing underground coal mines are occurring in closer proximity to and directly beneath urban areas. The density of built infrastructure potentially impacted by longwall mining is substantially increased in urban areas when compared with mining beneath rural areas. Management of the impacts of longwall mining in such areas requires extensive consultation with the affected community, including education and management of communities’ expectations regarding what could be expected during and after the mining period. Approaches undertaken by Tahmoor Colliery to manage the potential impacts of mining under the township of Tahmoor are discussed. A summary of …
Sterilisation Of Coal Resources In The Southern Nsw Coalfields: The Cfmeu Perspective, G. White
Sterilisation Of Coal Resources In The Southern Nsw Coalfields: The Cfmeu Perspective, G. White
Resource Operators Conference
The Construction, Forestry, Mining and Energy Union covers workers in several major industries, including coal mining. It represents an amalgamation of many trade-based and industry unions. One of these was “the Miners’ Federation” (ACSEF - Australasian Coal and Shale Employees’ Federation) that was formed in 1915. Union history shows sporadic coal unionism – including southern New South Wales – dating back to the 1850s. Within the coal industry the CFMEU represents the overwhelming majority of production and maintenance workers – over 15,000 across Australia. As a result of a high level of unionisation, and a history of strong union campaigning, …
Proceedings Of The 2006 Coal Operators' Conference, Naj Aziz
Proceedings Of The 2006 Coal Operators' Conference, Naj Aziz
Resource Operators Conference
Proceedings of the 2006 Coal Operators' Conference. All papers in these proceedings are peer reviewed.ISBN: 1 920806 48 2.