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Prediction Of Rock Cutting Performance Using Fracture Mechanics Principles - A Review (0b1a12ed-9606-4d46-b68d-eea006d52e76)
By Gexin Sun
This paper overviews the recent research progress in predicting cutting performance using fracture mechanics principles. It is emphasised that rock fragmentation due to cutting is mainly a process of
Jan 1, 1992
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Safe Pillar Extraction Practice - Some Geotechnical Principles Based on Australian Experience
By Bruce K. Hebblewhite
Underground pillar extraction continues to be practiced in Australia in various forms, in spite of the dominance of the longwall method, which accounts for over 90% of underground production. Australi
Jan 1, 2011
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A Novel Ground Control Program at Plateau Mining Company
By Hamid Maleki
A novel ground control program has been developed at Plateau Mining Company through five years of geotechnical investigations. The study was initiated to determine the causes for roof stability proble
Jan 1, 1987
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Evaluating Techniques for Monitoring Rock Falls and Slope Stability (03558dcc-00ee-4336-8044-b80294644df0)
By Edward McHugh
While less than 1% of reported accidents are associated with slope stability problems. slope failures were responsible for about 15% of all U.S. surface mine fatalities between 1995 and 2001. Small ro
Jan 1, 2002
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Integrating Ground Control And Mine Site Data Through A Geographic Information System
By Douglas C. Peters
Part of the ground control research at the U.S. Bureau of Mines is involved with improving ground control data collection and analysis methods. A geographic information system (GIs) is being used with
Jan 1, 1990
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Microcirculation Theory Analysis Of Spontaneous Combustion Of Loosing Coal In The Top-Coal Caving Region Of Entry
By Q. F. Wang
Spontaneous combustion hazard of loose coal in the top-coal caving region of entry affects the safety of the entry and top- caving longwall face seriously. In this paper, by combining on- site tempera
Jan 1, 2004
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Evaluation of Rockburst Hazard from Core Testing
By Michael Alber
Coal resource extraction reaches higher depth of overburden and rockbursts as well as associated seismic events appear to become an additional problem to he addressed by ground control engineers. For
Jan 1, 2004
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Monitoring and Prediction of Ground Movements Above Underground Mines in the Eastern United States
By M. Karmis
mining factors and representative ground movement parameters. Based on this analysis, the previously developed prediction methods were modified and tested for their applicability in the Appalachian co
Jan 1, 1987
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Comparison Of Multiple And Single Entry Roadways For Highly Stressed Longwalls
By Klaus Opolony
The world's most popular method of longwall mining requires multiple entry systems for the panels. In contrast to this mine layout the roadways in German coal mining are used for advanced mining
Jan 1, 2003
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Empirical Approach to Calculate Rock Loads in Coal Mine Roadways
By Erdal Unal
In order to define the support parameters, by use of empirical approaches, it is particularly important to analyze the rock-load height that should be controlled by supports. The controlling mechanism
Jan 1, 1986
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Progress In The Knowledge Of Granite Cutting With Diamond Wire (bf80b832-f557-4b46-b5c9-31193e67bf2d)
By A. Bortolussi
The paper discusses the state of the progress reached in the development of the diamond wire tool for cutting hard rocks. To the advances of this relatively new technology a substantial contribution h
Jan 1, 1992
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A Possible Alternative To Hardwood Chock Pieces
By B. G. D. Smart
The development of a softwood alternative to the hardwood chockpiece used to build the waste-edge breakers commonly incorporated in gateroad packs is described. The results of laboratory tests on soft
Jan 1, 1992
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Influence Of The Sloping Of Ground Surfaces On Mine Subsidence (165d3ebb-e4c1-4bc8-a5e4-409b4e24155c)
By D. M. Shu
A two-dimensional finite element modelling technique is applied to predict the subsidence movements on a sloping ground surface above a completely mined panel. The modelling is carried out for the sur
Jan 1, 1992
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Design Aspects In Multiple-Seam Mining: Case Studies
By Gregory J. Chekan
Developing a coal seam that has been influenced by previous mining in seams either above or below can result in severe ground control problems. In many instances, interactions between operations are i
Jan 1, 1990
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Determination And IT-Supported Evaluation Of Rock Mechanical Parameters And Their Utilization During Application Of Roof Bolting Techniques
By Nikolaos Polysos
For the planning and driving of gateroads supported by roof bolts a practical concept has been developed in order to determine the geological and rock mechanical parameters derived from exploration dr
Jan 1, 2001
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Updating the NlOSH Support Technology Optimization Program (STOP) With New Support Technologies and Additional Design Features
By Thomas M. Barczak
The initial Support Technology Optimization Program (STOP), Version 1.0, was released at the 19th Gmund Control Conference. This original program has since been updated to Version 2.3 which was releas
Jan 1, 2001
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Research on the rational structure of tensible rockbolt and the effect of surrounding rock reinforcement
By Chao-jiong Hou
The necessity of using tensible rockbolt in the roadway with soft rock, high in-situ stresses, mining influence and other complex conditions was discussed, the structures of three kinds of tonsibte ro
Jan 1, 1989
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Massive Pillar Failure--Two Case Studies
By David H. Tang
Similar massive pillar failures were observed in two underground coal mines with different configurations of mine workings and overburden depths. Finite element models were used to analyze the causes
Jan 1, 1984
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Pressure Measurements in the Gob (27227c3c-951c-4108-ba5c-3b6e67d232fb)
By H. Maleki
Gob pressure measurements were made in a Western U. S. coal mine as part of a long-term program to evaluate cave progress and to determine the influence of geological discontinuities on caving conditi
Jan 1, 1984
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Performance of Various Standing and Cribless Tailgate Support Configurations in a Large Eastern Coal Mine
By Gregory M. Molinda
Difficult mining conditions in deep western U.S. Iongwalls have necessitated the use of novel tailgate support systems. Extreme ground movement in these yielding gate systems has caused operators to u
Jan 1, 1997