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New Design Criteria for Roof Bolt Systems
By John C. Stankus
From research started six years ago, a new design criteria has been developed for mine roof bolt systems This design criteria precisely and quantitatively determines parameters such as bolt length, in
Jan 1, 1997
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The Use Of Cribless Tailgates In Longwall Extraction
By Russell Frith
The paper defines the various operational advantages associated with the use of cribless tailgates during longwall extraction and considers the associated ground control issues that need evaluating to
Jan 1, 2000
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Site Characterization For Planning Underground Stone Mines
By Francis S. Kendorski
Underground stone mines tier construction aggregates and industrial minerals are being planned in increasing numbers throughout the United States. At the middle of the last century (1950s) underground
Jan 1, 2000
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Design Considerations of the Secondary Roof Support for Longwall Tailgate Entries
By Jinsheng Chen
To maintain the stability of longwall tailgate entries, they have to be supported by not only the primary roof support but also the secondary roof support due to the impact of the longwall mining¬indu
Jan 1, 2003
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Changes In Seismic Measurements With Blast Induced Fracturing: A Field Experiment
By Clifford J. Roblee
In this paper, various seismic indicators are evaluated for ability to discern fractures induced into a rock mass by blasting. This is accomplished by presenting results from in situ crosshole seismic
Jan 1, 1989
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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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Delineation Of Abandoned Workings With An In-Seam Seismic Method
By I. Geldmacher
In-Seam Seismic (ISS) methods have been used extensively worldwide for the past 10 years to assist mine planning, espe¬cially longwall mining in coal seams. The technique is only starting to gain wide
Jan 1, 1990
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The Influence Of Geomining Parameters Over Stress Distribution In And Around Depillaring Faces
By Rajendra Singh
In India, pillar mining is contributing more than 90% of underground production which involves extraction of a part of coal from bords with pillars around as natural support in the development stage.
Jan 1, 1990
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Strata Control Advances At Jim Walter Resources, Mining Division
By Eddie Martin
Jim Walter Resources, Mining Division, employs the retreat longwall mining system as the primary method of coal production. The strata control aspects of developing and maintaining roadways for retrea
Jan 1, 1988
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Investigation into the Extent and Mechanisms of Gloving and Un-mixed Resin in Fully Encapsulated Roof Bolts
Effective strata control, utilising fully encapsulated roof bolts, is dependent on the installed quality of the reinforcement elements. One mechanism by which fully encapsulated roof bolts may become
Jan 1, 2003
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Design Procedure for Arch Canopies for Rehabilitation of High-Roof-Fall Areas
By Richard A. Allwes
A procedure is presented for the design of an arch canopy for the application of rehabilitating a high-roof-fall area. This procedure is specifically developed for evaluating an unbackfllled arch cano
Jan 1, 1986
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Field Testing of a Real Time Roof Mapping Drilling Display System in a Limestone Mine
By Craig Collins
The objective was to develop a Real Time Drilling Display System for Rotary Roof Bolting using Analyzing Software to display mapped holes as they are being drilled in real time. The Analyzing Softw
Jan 1, 2004
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An Approach To Identifying Geological Properties From Roof Bolter Drilling Parameters
By Gerald I. Finfinger
Identifying the properties of overlying rocks in underground mining operations is important to ensure the appropriate roof support design is used to maintain stability of the mine entries. Recently J.
Jan 1, 2000
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Introducing the New Windows ARMPS-LAM Program
By Keith Heasley, Christopher Newman, Zach Agioutantis
"Previously, in 2013, a laboratory version of the computer code ARMPS-LAM, introduced at the 32""d International Conference of Ground Control in Mining, successfully integrated the laminated overburde
Jan 1, 2016
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The Design And Application Of Propsetter? In Underground Coal Mines
By Clifford McCartney
The PropsetterTM System has been designed and developed to cost effectively solve problems experienced with conventional underground supports used in tailgates, headgates, bleeder entries and as suppl
Jan 1, 1995
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Ice Pillars, Packwalls, and Brattices
By David L. Kuck
This paper describes a system for providing structural, support in underground mines, employing water ice for pillars. packwalls and brattices. It consists of a refrigeration brine chiller, brine circ
Jan 1, 1987
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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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Remote Detection Of Abandoned Mine Workings Using Radio Imaging Method Techniques
By James G. Schotsch
Unmapped abandoned mines are hazards for under¬ground mines, surface mines and surface structures. The Radio Imaging Method (RIM) provides a cross borehole technique to remotely detect abandoned mine
Jan 1, 1990
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Specialty Truss System And Their Performance
By Ben L. Seegmiller
Specially truss systems? including the Intersection Truss®, Continuous Entry Truss®, Cutter Roof Truss® and Roktrus® have been used in many coal mines in the mid- west and western United States during
Jan 1, 1990
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Case Studies Of Depillaring Under Special Strata And Mining Conditions
By P. R. Sheorey
Four case studies of special geomining conditions from Indian coalfields are discuss- ed. These cases relate to (a) pillar extraction in two seams simultaneously under a difficult roof (Satpura I and
Jan 1, 1988