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Application Of A Polymer-Based Sealing Material To Prevent Roof From Weathering
By Peter Zhang
The immediate roof at the test site consisted of laminated clay shale that is likely to be susceptible to weathering. With seasonal dry-wet cycles in the mine ventilation air, the roof in the intake
Jan 1, 2009
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Evaluating Coal Pillar Mechanics Through Field Measurements (a8e6d7f0-5b83-40bc-b63c-ddaae2b3a526)
By Anthony Iannacchione
Designing coal pillars to provide resistance against overburden loads has long been an aim of rock mechanics engineers. The need for accurate pillar strength models has become more urgent as greater o
Jan 1, 1992
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Cavability Investigation Of A Stratabound Copper Deposit, Tong Kuang Yu Mine, Shanxi Province, China
By W. C. Lacy
Stratabound copper ore bodies in thick Proterozoic metamorphosed sedimentary and volcanic rocks at the Tong Kuang Yu Mine in southern Shanxi Province of China were considered as possibly being amenabl
Jan 1, 1989
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Jenmmar Compression Roof Control System
By John C. Stankus
To improve mine roof bolt performance, Jennmar Corporation commenced the design and development of a new roof control sys- tem. This new system designated "Insta'l Compression", not only improves
Jan 1, 1990
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Experimental and Numerical Study of Double Shearing of Bolt under Confinement
By Naj Aziz
The shear behaviour of reinforced rock joints is investigated for the bolt-grout-rock interaction and for failure mechanism. The effectiveness of the bolt application under lateral and axial loading c
Jan 1, 2007
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Ground Control for Muliple Seam Mining in German Coal Mines
By Holger Witthaus
There is more than a century of experience in multiple seam mining in Germany. In several mines up to 20 seams had been excavated within the last decades. Due to the nature of the deposit and the hist
Jan 1, 2007
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Detecting Strata Fracturing and Roof Failures from a Borehole Based Microseismic System
By Tara Bajpayee
Modern, highly productive underground mining operations need to assure the safety of their workforce by understanding where major strata fractures and roof failures could occur. Mines depend on a hos
Jan 1, 2008
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Convergence And Load Measurements In An Underground Mine In [Türk±ye]
By A. G. Pasamehmetoglu
This paper describes the conver¬gence and load measurements carried out in inclined seams at five longwall faces, two of which were supported by hydraulic props and the other three by conventional tim
Jan 1, 1992
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Progressive Failure Of The V-Day Mine And A Comparison With Other Similar Failures In Illinois
By G. C. Marino
The performance of the V-Day Mine near Danville, Illinois has been evaluated from data extending over about a 20 year period. The area included in this study involves over 16 acres. Essentially this e
Jan 1, 1990
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Research on the Interaction Between Roof Strata and Shield Supports
By Yuanwci Shi
This paper discusses the results of research on the interaction between roof strata and shield supports including the active and passive supporting functions of the shield supports which prevents roof
Jan 1, 1997
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Airbag Support for Ground Control in Thin Seam Coal Mining
By Fan Shaogang
In this paper, the airbags' structure and technical characteristics and its applications in China are described. Based on the practice of the airbags in mining thin seams, the effects on ground c
Jan 1, 1997
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Assessment of surface fracture depth and intensity due to subsidence over the longwall panel using a sonic technique
By A. W. Khair
This paper presents an analysis of fracture depth and intensity due to subsidence over the longwall panel. Sonic reflection techniques were utilized to determine fracture depth, and a variation of p-w
Jan 1, 1989
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Influence Of Discontinuity Orientations And Strength On Cavability In A Confined Environment
By L. J. Lorig
Much of the present knowledge about caving behavior of rock masses has been obtained from empirical observations. Additional notions about caving have been developed through inferences derived from tw
Jan 1, 1989
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Cable Support Systems For Longwall Gate Road Stability
By Stephen C. Tadolini
The U.S. Bureau of Mines, in cooperation with the Cyprus- Plateau Mining Company, has conducted research to provide an alternative to traditional secondary support systems in a two-entry, yield pillar
Jan 1, 1995
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Is Mining Coal at a 900M Below Surface at the Xuandong Coal Mine in China Challenging or Just Interesting Rock Mechanics?
By Wouter Hartman
Xuandong Coal Mine is mining coal in one of the most challenging underground environments in the world. This work has found that it is not only challenging but it also has the composition for some int
Jan 1, 2012
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Application of Chain Conveyor Cutter (Ccc) to Highwall Mininig System
By Takashi Sasaoka
Chain Conveyor Cutter (CCC) is a chainsaw-type machine and originally developed for the construction of underground walls and/or ground improvements. CCC was developed from the accumulated technology
Jan 1, 2012
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High Horizontal Movements In Longwall Gate Roads Controlled By Cable Support Systems
By Dennis R. Dolinar
Controlling coal mine roofs subjected to high-horizontal stress conditions has always been difficult and uncertain. Traditional supports such as wooden cribs and posts, concrete donut cribs, and stand
Jan 1, 1996
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Strata Management with Ground Behavior Assessment for Mass Exploitation of Coal Deposits: A Case Study of Continuous Miner
By Sanjay Kumar Singh
The mechanics of load transfer in bord-and-pillar mining is not well understood despite the evolution of the art of pillar extraction over the last 20 years via trial and error (empirical) or Rock Mas
Jan 1, 2012
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Pillar Design Considering the Plastic Behavior of the Coal Seam
By Andre Zingano
The variation in pillar behavior at underground coal mines working in the Bonito coal seam is observed in both research and mining company case studies. There is no consistency in pillar behavior, as
Jan 1, 2012
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Large Scale Ground Instability Caused By Failure of Underlying Pillars: A Case Study of Dynamic Multiple Seam Interaction
By Christopher Mark
Severe dynamic multiple seam interactions can occur when active mine workings are subsided by underlying mining activity. The most dramatic events are usually caused by longwall mining or pillar recov
Jan 1, 2012