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Cable Bolts - An Effective Primary Support System
By Stephen C. Tadolini, John P. McDonnell
"High-strength cable bolts have been used for ground support in underground coal mines for many years. Cable bolts are routinely used as secondary ground support in numerous longwall gateroad support
Jan 1, 2010
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Highwall Stability Implications from Longwall Mining at Broadmeadow Mine
By Bob Coutts, Matt Martin, Dan Lynch, Dan Payne
"The Broadmeadow punch longwall coal mine in Central Queensland Australia has experienced significant highwall movement associated with the effect of longwall subsidence when the longwalls approach th
Jan 1, 2018
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A 3-D Semi-Analytical Method for Subsidence Prediction and Stress Analysis in Coal Mining
By Li-min Liu
The Semi-Analytical method can be used to solve a variety of problems in geomechanics and civil engineering. When it comes to layered rock strata and rock masses, it is superior to all other analytica
Jan 1, 2002
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Development of a Numerical Model for the Approximation of Stress Distribution for a Single Vertical Backfilled Stope
By Christopher Newman, Zach Agioutantis, Gabriel S. Esterhuizen
"As conventional underground deposits are continuing to be depleted, mining operations have been forced to produce at greater depths and in more geologically and geometrically challenging conditions.
Jan 1, 2018
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Roadway Supporting Technology Applied to Very Soft Coal Seam at Yanlong Mining Area in China
By Sheng Zhang
The compressive strength of coal in Yanlong mine area of China is less than 3 MPa. Basically, it is powdery. The roof and floor rocks are mudstone. Therefore this coal seam is a typical ?three soft? c
Jan 1, 2013
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Analysis of Alternatives for Using Cable Bolts as Primary Support at Two Low–seam Coal Mines
By Gabriel S. Esterhuizen
"Cable bolts are sometimes used in low-seam coal mines to provide support in difficult ground conditions. This paper describes cable bolting solutions at two low-seam coal mines in similar ground cond
Jan 1, 2015
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Safe Mining Evaluation of Coal Seam between Abandoned Upper and Lower Room-and-Pillard Mines
By Guorui Feng, Min Zhang, Yi Luo, Jian Yang, Yujiang Zhang, Junwen Bai
"Safe mining of coal seam sandwiched between abandoned upper and lower room-and-pillared mines (ULPM) ·is increasingly becoming the focus of attention in recent years, which is closely related to the
Jan 1, 2016
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Options to Control Groundwater-Based Georisks along Geological Faults in the Large Scale Area of Influence of an Open Pit Mine
By Markus Papst, Denise Millier, Daniel Beckers, Axel Preusse
"At an open-pit lignite extraction mine in Germany, groundwater has to be pumped over a large area, which leads to subsidence at the surface. As long as the geology of the area of influence is homogen
Jan 1, 2016
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Economic Impact of Ascending Mine?Waters in Germany
By Axel Preusse
Due to a political decision, German hard coal mining will come to an end in the year 2018. By then, there will have been more than 150 years of industrial grade mining activities. Located in the weste
Jan 1, 2013
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Detecting Abandoned Coal Mine Entries by High Resolution Earth Resistivity Method
By Xianxin Shi
In surface electrical exploration the high resolution earth resistivity method (HRRM) is a very effective method for detecting abandoned drift mines workings. When the abandoned mines are more than 50
Jan 1, 2005
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An Integrated Approach to the Monitoring and Modeling of Ground Movements
By A. Chrzanowski
The integrated approach to monitoring surveys is based on a simultaneous utilization of geodetic, photogrammetric and geotechnical measurements of displacements, tilts, strains and any other geometric
Jan 1, 1984
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The Mechanical Property Of Coal Containing Gas (d5aeba01-a0db-4f86-a21e-adbcc6290eab)
By Yao Yuping
The strength and deformation of more than two hundred coal samples have been tested in the condition of triaxial compression. The regression equation showing the relationship between coal strength and
Jan 1, 1992
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Study of the Behavior for Backfilling Material in Room-and-Pillar Coal Mining
By Joao Felipe Costa, Jair C. Koppe, Andre Zingano, Cleber Gomes
"Run-of-mine Brazilian coal has high ash content and low calorific power. Therefore, the coal must be washed to achieve the power plant specifications for burning coal. A large amount of waste results
Jan 1, 2010
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The Caterpillar HW300 Quickscan
By Pieter-Jan Kleiterp
Caterpillar has been involved in highwall mining since the purchase of Bucyrus in 2011. The Cat® HW300 is a continuation of the Superior Highwall Miner that was first sold in the USA in 1994. Currentl
Jan 1, 2014
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Cable Supports For Improved Longwall Gateroad Stability
By Stephen C. Tadolini
Cable supports offer several advantages over traditional secondary support methods. Cable supports enhance stress redistribution to pillars and gob areas, minimize or eliminate timbers and cribs which
Jan 1, 1993
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Development Of A Resin Point Anchor
By Richard R. Wilding
The United States Coal Mining Indus- try had the opportunity to greatly improve their roof control techniques during the nineteen seventies by the use of fully grouted resin roof bolts. This new tool
Jan 1, 1981
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Numerical Analysis of the Effect of Coal Seam Characteristics on the Longwall Top Coal Cavability
By Rudrajit Mitra, Tien Dung Le, Chengguo Zhang, Bruce Hebblewhite, Joung Oh
"Geomechanical and geotechnical characteristics of coal seam are important parameters that directly affect the cavability of top coal in the longwall top-coal caving (LTCC) method. The impact of these
Jan 1, 2017
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Subsidence In Indian Coalfields
By N. C. Saxena
Subsidence investigations in Indian coalfields have led to development of relationships between subsidence movement parameters and defining of safe limits of subsidence movements for surface propertie
Jan 1, 1988
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How to Mitigate Coal Mine Bumps Through Understanding of the Violent Failure of Coal Specimens
By Gamal Rashed
This research is divided into two parts: the first part of this research focuses on understanding coal mine bump mechanisms, and the second part focuses on mitigating the violent failure associated wi
Jan 1, 2013
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Intersection Stability and Tensioned Bolting
By Yunqing Zhang
Roof failure occurs much more frequently at intersections than entries and crosscuts. Using a commercial finite element package, four-way and three-way intersections reinforced with the tensioned bolt
Jan 1, 2003