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Considerations Of Gas Outbursts In Using Dome Salt Mines For Storage Of Oil And Nuclear Waste
By M. Ashraf Mahtab
A feature of interest in stability of excavations in domal salt is the phenomenon of gas outbursts which has occurred in five of the six mines in Louisiana salt domes. Gas outbursts are sudden errupti
Jan 1, 1981
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Mathematical Modeling Of Strong Roof Beds In Longwall Mining
By Xiaolin Wu
Most coal bump occurrences in the U.S. are directly related to mining operations under strong roofs. An understanding of the behavior of bridging or cantilevering strong roofs over working longwall fa
Jan 1, 1993
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Laboratory Testing of Rib Straps
By E. Bane Kroeger
Rib failure is a hazard that has resulted in many injuries and fatalities in underground coal mines, especially in soft coal seams. Conventional rib control methods including rib boarding, shotcreting
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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Effects of Bolt Spacing, Bolt Length, and Roof Span on Bolt Loading in a Trona Mine
By Steve P. Signer
Researchers from the Spokane Research Laboratory of the National Institute for Occupational Safety and Health installed 39 instrumented, fully grouted bolts at six test sites in a trona mine retreat p
Jan 1, 2001
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Determination of Effective Column Lengths for Resin-Grouted Roof Bolts
By W. A. Cincilla
The use of resin-grouted rock anchors continues to gain popularity in underground wall mines in the United States. It is estimated that during 1985, more than 30% and as many as 35% of all roof bolts
Jan 1, 1986
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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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Geotechnical Planning and Development of the BHP Minerals San Juan Pilot Mine, Waterflow, NM
By P. E. Christensen
Due to ever-increasing stripping ratios associated with the No. 8 Seam at the San Juan Mine surface operation, BHP Minerals decided to implement longwall mining for the extraction of the substantial f
Jan 1, 1998
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Mining-Induced Stress Measurement With Hydraulic Borerole Pressure Cells
By Paul A. Lu
This paper proposes an unconventional, simple, and practical method of measuring mining-induced around stresses with hydraulic borehole pressure cells. The method is a direct ground stress measuring t
Jan 1, 1984
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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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Overview of Safety Considerations with Highwall Mining Operations
By George Gardner
The rapid growth of highwall mining in the Appalachian coalfields has resulted in unique safety concerns. Due to the concentration of activity at the base of the highwall and the potentially destabili
Jan 1, 2002
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Longwall Stability Analysis Of A Deep, Bump-Prone Western Coal Mine-Case Study
By Lance R. Barron
The U.S. Bureau of Mines, in cooperation with a central Utah coal .mine operator, began a study in July 1988 into longwall gateroad designs applicable to deep, bump- prone mine conditions. Prior to th
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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Prevention. Control and Management of Coal and Gas Outbursts
By Lu Jiam Zhang
Coal and gas outburst is one of the serious natural disasters in the coal mines of China. Since 1950, more than 10,000 coal or gas outbursts have occurred in more than 200 underground coal mines of di
Jan 1, 1987
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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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How to Design an Efficient Roof Bolting Plan Based on Simple In-Mine Measurements
By C. J. H. Brest van Kempen
The techniques developed should provide a useful tool, not only during the initial formulation of a suitable bolting plan for a new section, but also for periodic check¬ing on the utilization factor
Jan 1, 1986
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Shear Bond Stresses Along Cable Bolts
By Hani S. Mitri
The behaviour of grouted cable bolts used for rock reinforcement as a means of ground control in hard rock mining is investigated. The study utilizes an analytical model which is based on the variatio
Jan 1, 1990
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Behavioral Aspects of Roof/Rib Injuries--Implications for Training Utilizing Stereoscopic Photography
By Edward A. Barrett
A significant number of injuries resulting from fa118 of roof and rib may be avoided by modifying the reactive behavior of miners as they encounter potentially hazardous ground conditions. In 1984-85,
Jan 1, 1986
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Assessment Of Applicability Of Strength Criteria For Rock And Rock Mass To Coal Pillars
The applicability of four empirical strength criteria for rock masses, namely, Hoek and Brown, Bieniawski - Yudhbir et al., Rarnamurthy - Arora and Johnston - Sheorey et al. has been tested against th
Jan 1, 1992
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The Strong Outbursts of Coal and Gas in Coal Mines in China
By S. N. Zhow
China has at least 200 collieries suffering from the problem of instantaneous outbursts of coal and gas. The strong outbursts often occurred in active tectonic lanes and areas of high stress concentra
Jan 1, 1987