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SME-ICGCM (1801)
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TITLE Strata Control Investigations During Fully Mechanized Coal Pillar Extraction in Indian Coalfield
SUMMARY Considering the importance of a fully mechanized depillaring operation, the Indian coal mining industry has introduced a number of such depillaring operations at depths of cover ranging from 60 m to 377 m. The overlying strata of these depillaring faces vary widely from highly laminated, weak and easily caveable to massive, strong and difficult to cave. Most of these mechanized depillaring operations were carried out in difficult site conditions, however, performance monitoring in the field has ...
AUTHOR Singh, Rajendra
TITLE AMCMRR- An Analytical Model for Coal Mine Roof Reinforcement
SUMMARY "An Analytical Model for Coal Mine Roof Reinforcement (AMCMRR) has been developed. AMCMRR utilizes a Factor of Safety (FOS) approach, which is commonly used in all forms of engineering. The starting point in the development of AMCMRR was an existing analytical roof behavior and roof support design methodology/model, originally developed by Colwell. This technique was used successfully in the Australian underground coal industry for roof support evaluation and design prior to and during the cours...
AUTHOR Colwell, Mark G (primary); Frith, Russell
TITLE A Case Study of Topography?Related Stress Rotation Effects on Multi?seam Stability
SUMMARY The complex interaction between multiple seam pillar extraction panels and variable topography can generate unexpected ground control problems. This case study describes stress-related damage in multiple seam workings that resulted in difficult operating conditions and compromised the safety of the support crews. The damage appeared to be caused by horizontal stress but the unexpected location of the damage baffled the authors. A 2D Finite element analysis was conducted of the mine layout and su...
AUTHOR Tulu, Ihsan Berk
TITLE Combined Effects of Rock Bedding Orientation and Topography on Stresses Around Mine Openings
SUMMARY In this paper we introduce a realistic model for mine openings that explicitly considers the effects of local irregular topography. Also, we consider the effect of entry orientation and rock anisotropy on the induced stress fields around mine openings under the given in-situ stress field. A triangular mesh formulation is derived for representing complicated irregular surface topography and underground openings. Each element contains three internal collocation nodes. Parts of the surface which ar...
AUTHOR Tabrizi, Amirhossein Molavi
TITLE The Prediction of Pillar Interaction Effects for Deep Multi-Seam Workings
SUMMARY "Mining in multi-seam workings has been undertaken for many years in the VK Remnant pillars above and/or below current working areas have an important influence on retreat gateroad conditions at five of the remaining six deep coal mines. These interaction effects need lo be predicted ahead of mining so that longwall panels can be positioned to minimize roadway damage and to identify areas where additional support should be installed early into competent strata when and where it is most effective...
AUTHOR Lightfoot. Nicholas (primary); Liu, Na
TITLE Introduction of a New Superior Coating on Ground Support Products
SUMMARY Corrosion can often cause significant strength reduction and failure of steel rockbolts, thus demanding continuous rehabilitation and posing challenges to underground mines in maintaining long term ground support. The mining industry has traditionally applied galvanized and epoxy coatings for protection of ground support and reinforcement in corrosive environments due to cost considerations. However, under a harsh and corrosive groundwater condition with extreme pH levels, failure of the exist...
AUTHOR Oler, Renn
TITLE Sandy Creek Waterfall?Case Study of Successful Management of the Potential Impacts of Longwall Mining on a Sensitive Natural Surface Feature
SUMMARY BHP Billiton Illawarra Coal operates Dendrobium Mine in an area 10-20km west-northwest of Wollongong in the Southern Coalfield of New South Wales, Australia. The mine recently completed longwall mining in Area 3A adjacent to an overhanging rock feature known as Sandy Creek Waterfall, which had been identified as a significant, and potentially sensitive natural surface feature of the environment. This waterfall lies within the Sydney drinking water catchment area, in a surface terrain of variab...
AUTHOR Hebblewhite, Bruce K.
TITLE Evaluation of Rock Excavation Technologies for Seismically Active Mines
SUMMARY "The long-term viability of seismically active and/or deep mining operations hinges upon the industry's ability to maintain profitability in a climate of increasingly difficult conditions, escalating operating costs and fluctuating metal prices. Within this context, it is prudent to explore mining techniques that could provide means for safer and more profitable extraction of seismically active and/or deep seated deposits that are vital to the long term survival of the industry.The first step wa...
AUTHOR Singh, S. Paul
TITLE Observations of Impacts to Pennsylvania's Interstate Highways by Longwall Mining
SUMMARY "Longwall bituminous coal mining has been practiced in Pennsylvania since the 1970""s. Hundreds of longwall panels have been mined during the last 40 years but only 24 have actually undermined Pennsylvania's Interstate Highway System. The impact to interstate highways are summarized in this paper and the factors that influence the magnitude of these impacts are examined.INTRODUCTIONOver the last 30 years, interstate highways in Pennsylvania have been undermined by portions of 21 bituminous coal ...
AUTHOR Iannacchionc, Anthony (primary); Benner, Jessica ; Witkowski, Megan ; Miller, Harold
TITLE Selection of Tunnel Support System by Using Multi Criteria Decision Making Tools
SUMMARY "Selection of the optimum support system for underground openings such as tunnels is a complex process. In this paper a new approach, based on a combination of the Analytical Hierarchy Process (AHP) the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) and the Preference Ranking Organization METHod for Enrichment Evaluations (PROMETHEE), is introduced. For this purpose, the selection process is assumed to be a multi criteria decision-making problem. First different support ...
AUTHOR Hosseini, Navid (primary); Orace, Kazem ; Gholinejad, Mehran