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Indian Experiences Of Mechanised Coal Pillar Extraction (b04565f5-fd0b-4a80-a8aa-fcb98125fe52)
By Arun Kumar Singh
Wide variation in the nature of the coal seams and the surrounding rock mass of the Indian coalfields and very little information about the associated stress fields were observed to be the major hurdl
Jan 1, 2009
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Recent Trends of Coal and Gas Outburst Accidents in China
By Ming Ju Liu
China has been suffering from the most serious coal and gas outburst accidents. The situation has become worse than ever with the mining of deeper coal seams at higher production rates in a more compl
Jan 1, 2008
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Coal Pillar Loading Mechanisms and Progress in Pillar Design
By David Hill
The Australian underground coal mining industry is increasingly operating in an environment that challenges traditional concepts of coal pillar design, against a background of heightened expectations
Jan 1, 2008
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Proposed Laboratory Quality Control Test Method for Resin Capsules Used in Underground Mines in South Africa
By Dave Minney
The South African mines health and safety regulations require that mine management establish a quality management system for rock support material. Quality control of resin capsules used as a support
Jan 1, 2007
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Cable Bolting - Potential Applications For Variable Strata Conditions
By David Allen
Cable bolting is a relatively new strata reinforcement technique that has been used successfully in Australia and the United Kingdom. Jim Walter Resources, Inc. has examined the principles and can vis
Jan 1, 1994
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Pillar Optimization For Initial Design And Retreat Recovery
By Charles Steed
The design of pillars in room and pillar operations is always a compromise between factor of safety and ore recovery. In actively mined and accessed areas the stability of pillars must be sufficient t
Jan 1, 2003
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Seismic Studies Over Active Longwall Mines
By Thomas H. Wilson
Common offset and refraction seismic data have been collected over four longwall panels at two different locations within West Virginia. Surveys prior, during and after mining were made in both areas.
Jan 1, 1988
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German-Chinese Cooperation in the Field of Mining Subsidence Engineering
By Axel Preusse
Mining subsidence plays an increasing important role in the Chinese hard coal mining. Reasons for this are a substantial rise of production during the last decade, a dense settlement in many mining
Jan 1, 2007
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Pillar Reinforcement or Rib Support?
By André C. Zingano
The coal pillars in room-and-pillar mining method are subjected to vertical stress due to overburden rock mass and horizontal stress relieve due to entries excavation around them. Some coal mining com
Jan 1, 2006
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The Forensics Of Underground Roof Falls (c5c31282-77d4-44b1-8aa1-d01534eb267d)
By Steve Tadolini
Underground roof falls can have devastating effects on the safety of operations personnel, and equipment, and seriously impact production. Immediate steps are usually taken to danger off and secure t
Jan 1, 2009
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Stability Mapping To Examine Ground Failure Risk: A Field Study At A Limestone Mine (b0d73e07-1fdd-41b0-ab9e-b3e15e89a17e)
As the surface reserves are being depleted, more and more stone operators are seeking underground mining options. Stability of underground openings is a major concern for the safety and productivity.
Jan 1, 2009
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An Innovated Self-Screwed Tube Bolting System(STBS) To Reinforce Stability Of Mine Entries (b3995592-5744-4f95-89d6-4030a00b69b4)
By Xingtian Hui
Due to variation in the geological natures of underground coal mines, especially when the entry?s roof/floor are soft and weak, it is vital to select an appropriate roof bolting system to ensure entry
Jan 1, 2009
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A First Step in Developing Standing Roof Support Design Criteria Based on Ground Reaction Data for Pittsburgh Seam Longwall Tailgate Support
By Thomas Barczak
Roof support systems are designed for roof control to prevent unplanned falls. It sounds logical and has been the conventional thinking in support design since supports were first installed. In orde
Jan 1, 2008
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Coal Mine Safety in China and Degasification of Longwall Panel Using In-Seam Directional Drilling Technology
By John Feddock
A recent increase in energy demand has resulted in the rapid growth of coal consumption in the People?s Republic of China (PRC), which is the largest coal producer and consumer in the world. Reported
Jan 1, 2007
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Geotechnical Assessment Of Skin Reinforcement In Underground Mines (f05de68f-e8c8-43ca-aab9-9a65452cc10f)
By Jan A. Nemcik
Steel mesh has been used successfully for many years to control friable roof conditions and prevent loose roof and rib material from caving into the roadway. Despite its extensive use, the installati
Jan 1, 2009
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A Mine Evaluation Protocol Using Applied Rock Mechanics Techniques
By Gary B. Petersen
The author has developed a seven-step process called the Applied Rock Mechanics (ARM) Protocol that the author has used to solve numerous roof stability problems in mines throughout North America sinc
Jan 1, 2012
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Characteristic Acoustic Emission Sequences of Rock Samples Under Uniaxial Loading
By Nic Slatalla
Acoustic emission monitoring techniques are a powerful tool for analysing deformation behaviour and fracture characteristics of rock samples under uniaxial loading. Uniaxial compression tests wer
Jan 1, 2008
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Stress Variation on Longwall Powered Supports in Upper Seam due to the Presence of Old Mined Out Workings in Lower Seam
By Vedala Sastry
Longwall mining for coal extraction in deeper deposits is gaining momentum in India, due to the increasing stripping ratios and depletion of shallow deposits amenable for surface mining. In longwall
Jan 1, 2007
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The Effects of Reduced Annulus in Roof Bolting Performance
By Stephen Tadolini
The annulus thickness, for bolts anchored with resin, effects the systems final performance. Recent developments in the manufacturing process of these support systems, coupled with improved resin char
Jan 1, 1998
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Analysis Of The Initial Collapse Of The Overburden Over Longwall Panels Using Subsidence Data
By Gennaro G. Marino
Documented case histories of surface ground movements from mine subsidence were utilized to help determine when the initial collapse of the overburden occurred above longwall panels. By studying this
Jan 1, 1988