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The Duncan Method of Partial Pillar Extraction at Tasman Mine
By Kent D. Mctyer
Mining commenced at Tasman Mine in late 2006. The current method of mining is bord and pillar using continuous minerbolters and shuttle cars for first workings and secondary extraction using mobile ro
Jan 1, 2011
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Geotechnical Constraints On A 6 M Single Pass Longwall
By Ross W. Seedsman
The feasibility of 6 m high single pass longwalling has been studied using Newlands Mine as a case study An intensive geological investigation identified a range of hazards but a mine layout was possi
Jan 1, 1992
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Research on the rational structure of tensible rockbolt and the effect of surrounding rock reinforcement
By Chao-jiong Hou
The necessity of using tensible rockbolt in the roadway with soft rock, high in-situ stresses, mining influence and other complex conditions was discussed, the structures of three kinds of tonsibte ro
Jan 1, 1989
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Improving Roof Truss Performance
By James Pile
Since C.C. White introduced coalmine roof trusses in 1967. many different systems have evolved. Beginning in the mid 1990's, several types of bar/cable truss systems have been introduced. A new a
Jan 1, 2004
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Influence Of Support Capacity And Geometry On Tailgate Support
By E. Hosca
Alternative tailgate loading conditions due to conventional and conventional/yield pillar combinations were evaluated to define roof loading. In order to isolate different loading situations, the tail
Jan 1, 1994
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Recent Innovations for Slope Development
By Tim Burgess
Patton Mining, LLC and J.H. Fletcher Company recently collaborated and mechanized the sometimes hazardous, and always labor intensive, process of installing standing steel supports during the construc
Jan 1, 2011
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Three-Dimensional Analysis Of Mine Dump Point Stability
By Radoslaw L. Michalowski
The operation of mobile mining equipment near the crest of stockpiles and wastedumps often results in localized slope failures. The Bureau of Mines has developed a computer code based on a rigorous li
Jan 1, 1990
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Heat-Imaging Experimental Study Of Reducing Local Gas Accumulation By Rotary Radial Jet
By S. Q. Yang
Rotary radial jet improves greatly the pulsing velocity of airflow along each direction everywhere in the entry, intensifies transverse migration of air, eliminates effectively the local gas accumulat
Jan 1, 2004
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Determination Of Plate Size Effect On Ultimate Bearing Capacity Of Weak Floor In Underground Coal Mines Using A Boundary Integral Approach
By Zhanjing Yu
In this paper, an equation is developed to characterize the relationship between the UBC and plate size using a boundary integral approach. The equation was validated by the results from mo& than seve
Jan 1, 1993
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Chemical Destressing to Alleviate Rockbursts
By S. P. Singh
Destress blasting is commonly used in the mines to minimize the occurrence of rockbursts. The fracturing created by destressing in the vicinity of the face reduces the stress concentration by pushing
Jan 1, 1987
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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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Application Of Time Domain Reflectometry To Ground Control
By Kevin M. Connor, O&apos
An example application is presented in which Time Domain Reflectometry (TDR) was utilized to monitor roof strata movements during pillar extraction in a potash mine. The study was initiated when Weste
Jan 1, 1990
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Investigation Into Cutting Characteristics Of Indian Coal Seams (bf5c67f9-81c7-4039-8f47-cd39420e2b8e)
By T. N. Singh
With a view to producing increased target output every year, Indian coal mining industry is fast moving towards mechanisation but the present approach of mechanisation suffers from lack of standardisa
Jan 1, 1992
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Pillar Sizing
By Marek J. Mrugala
Coal strength based on scaled uniaxial compressive strength from the laboratory and back calculations from in-mine observations of pillar stability indicate that material strength scaling rules are op
Jan 1, 1989
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The Effects of Longwall Coal Mining on the Hydrogeology of Southwestern Pennsylvania
By Megan N. Witkowski
The purpose of this study is to investigate the susceptibility characteristics of domestic and agricultural water supplies that may be vulnerable to diminution or total loss of supply when active long
Jan 1, 2011
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Utilization of Ground-Penetrating Radar to Determine Roof Competency in Underground Limestone Mines
By Tim Ross
J. M. Huber Corporation's Quincey Mine. an underground limestone mine located near Quincy. Illinois, has operated successfully and safely for many years utilizing roof bolts on a very limited bas
Jan 1, 2002
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Comparison of Pillar Strengths Calculated Using Empirical Equations and Finite Elements
By Aarao de Andrade Lima
Mechanical properties typical of coal are used in the comparisons of pillar strengths based on finite elements and the empirical equations of Holland-Gaddy, Salamon-Munro, Obert¬Duvall, and Bieniawski
Jan 1, 1997
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Horizontal Stress Control In Underground Coal Mines (1dbd7295-90f8-4003-a003-9120dc19934c)
By S. M. Matthews
The magnitude and orientation of the in situ stressfield has been determined as a key factor in controlling the stability of openings for both coal mine development and extraction. Monitoring of roadw
Jan 1, 1992
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Crosshole Seismics: Applications In Mining
By Richard E. Thill
Two Cross-borehole systems were developed by the Bureau of Mines, one operating at a central frequency of 20 kHz for close-in spacing between boreholes (2-20m) and another operating at a dominant freq
Jan 1, 1989
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Investigation of Subsidence Over AML: A Case Study
By P. M. Lin
The problem of abandoned mine land (AML) subsidence is getting more severe because abandoned mine lands which used to be located in the remote areas have been gradually developed into suburbs or even
Jan 1, 1987