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Geophysics For The Detection Of Abandoned Mine Workings
By Christopher Phillips
In light of recent events in the mining industry, there has been an increasing demand for technology to detect underground voids and abandoned mine workings. This paper summarizes the use of geophysic
Jan 1, 2003
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Site Characterization For Ultra-Close Multi-Seam Mining
By Yingxin Zhou
Data from these field studies and previous case study data have been combined to define ultra-dose seam mining environments and relate them to observed failure conditions. A rating system for ultra-cl
Jan 1, 1990
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Surface Flooding-Considerations For Mining Facilities Site Selection
By Daniel S. Mazzei
This paper will be a general discussion of surface flooding considerations as they affect mining facilities site selection, based primarily on experience with several such problems with which MSHA&apo
Jan 1, 1982
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Geotechnical Planning Basis for the Optimization of Workings
By Nikolaos Polysos
Besides considering the given geomechanical conditions, the geological/geotechnical logging of drill cores and heading faces during the driving of parallel entries and the resulting rock classificatio
Jan 1, 2003
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A Study On The High-Water Solidifying Materials For Gob-Along Roadside Instead Of Coal Pillars
By Yunxin Qiu
A new technology has been introduced - the use of the High-Water Solidifying Material for providing pumped roadside supports to maintain a roadway for re-use in longwall retreating. As a gob edge supp
Jan 1, 1992
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Stability And Stress Evaluation In Mines Using In-Seam Seismic Methods
By E. M. Williams
The U.S. Bureau of Mines is investigating the use of in-seam seismic methods to monitor stress-induced changes in coal near the working face of longwall mines. Seismic surveys performed through a long
Jan 1, 1994
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Development of the Laboratory Short Encapsulation Pull Test for a Revised British Standard on Rock Reinforcement Components Used in Coal Mining
By D. Bigby
The current British Standard on rock reinforcement components used in coal mining (BS7861:1996) employs the axial double embedment tensile PET) test to determine the main system load transfer performa
Jan 1, 2005
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Manifestation Of Mine Pressure And Its Relations To Overlying Strata Movements
By Z. C. Song
[THIS PAPER WAS TRANSLATED FROM CHINESE TO ENGLISH BY S. S. PENG, WEST VIRGINIA UNIVERSITY] Immediately after coal extraction, the pressure that causes the movement of the surrounding strata is c
Jan 1, 1982
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Improved Pull out Strength of Fully Grouted Roof Bolts through Hole Geometry Modification
By Luis Giraldo
Rock bolt installation characteristics near roof falls have been identified as contributing to failure. One documented and regularly occurring failure mechanism is loss of anchorage between the grout
Jan 1, 2005
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Application in Design for Close Proximity Multi-Seem Mining
Virtually all mineable Appalachian coal seams exist in a multi-seam environment. This makes it inevitable that most seams will eventually experience interaction induced ground control and mining probl
Jan 1, 1987
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Innovative Concept In Tailgate Entry Support: Elimination Of Crib Blocks Through Utilization Of New High Capacity Roof Truss Systems (3aab4965-6f53-4caa-9e67-bf9dbe5d5a16)
By John C. Stankus
In this paper, an innovative concept in longwall tailgate support is discussed. This new concept utilizes a new high capacity roof truss system in lieu of conventional wooden crib block. The first fie
Jan 1, 1994
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AMCMRR- An Analytical Model for Coal Mine Roof Reinforcement
By Mark G. Colwell, Russell Frith
"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 p
Jan 1, 2010
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Analysis of Panel Stability for Post-Mining Slurry Injection
By Tim Ross
Slurry injection into mined-out panels is an attractive alternative for disposal of coal preparation plant fines. however, in areas where surface subsidence cannot be tolerated, either by law or neces
Jan 1, 1998
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Machine Design Parameters For High Seam Truss Bolting Applications
By G. Bucelluni
An essential element of truss bolt installation requires machines to angle a hole in the top of approximately 39° to 45° from its vertical axis. Parameter which inherently effect the drill position ar
Jan 1, 1982
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Non-Destructive Testing on Fully Grouted Rockbolts
By Dieter Wittenberg
The use of thc ultrasound technique for monitoring rockbolt support has at last provided support engineers with a measunng system capable of pinpointing fracture failuns in fully-grouted rockbolts. Th
Jan 1, 2001
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Seam Structure - An Important Criterion for Coal Pillar Design
By Kot F. v. Unrug
In spite of the extensive research and accumulated experience from mining operations, an appropriate pillar design remains an open issue. Due to the shrinking reserve base, present mining operations m
Jan 1, 2005
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Entry Stability Monitoring & Analysis For Longwall & Continuous Mining Systems
By Wm. Mark Hart
Under a specific geological condition, roof supporting method, and pillar-entry system, an entry convergence concept may be the most effective means that can be used to effectively indicate the longwa
Jan 1, 1995
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A New Approach to the Integrity Testing of Ground Anchorages
By Andrew Starkey
Ground anchorage systems in the form of rock bolts are used extensively throughout the world as supporting devices for civil engineering structures such as bridges and tunnels. It is widely recognized
Jan 1, 2001
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Stability Control of Clusters of Deep Openings Around Shaft Bottom and Theory of Rock Deformation
By Yanfa Gao
Clusters of underground openings were developed around the shaft bottom of Tangshan Mine. They were deep and located in soft rock strata. After development, those openings have been subjected to consi
Jan 1, 2002
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In-Situ Pillar Strength Determination for Two-Entry Longwall Gates
By H. N. Maleki
Extensive measurements and underground observations in three Western U. S. coal mines are integrated in this paper to determine in-situ pillar load-deformation characteristics for narrow (30 it wide,
Jan 1, 1988