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Application of Highwall Mining System at Surface Coal Mine in Thailand
By Takashi Sasaoka, Pinyo Meechumna, Hiroshi Takamoto, Pipat Laowattanabandit, Akihiro Hamanaka, Kikuo Matsui, Hideki Shimada
"The EGAT Mae Moh coal mine is an open-cut coal mine in Thailand that produces about 16 million tons of lignite annually to generate 2,400 mw of electricity. The surface mine pit covers is 4 by 7 km (
Jan 1, 2010
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The Evolution of Pre-Driven Recovery Roadways at Crinum Mine
By Adam Mackenzie, Dan Payne, Yass-Marie Rutty
"Historically, the Crinum mine has experienced significant falls of ground when longwall production slowed to prepare for recovery in weak roof areas. These conditions continue through the recovery pr
Jan 1, 2016
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Long-term Subsidence Over Longwall Chain Pillar Systems and Its Effects on Surface Structures
By Yi You
A research has been conducted to study the long-term subsidence and its possible effects on surface structures In this research, the surface movements in areas when potential for developing long-term
Jan 1, 1997
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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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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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Axial Performance of a Modified Fully Grouted Cable Bolt Tested with a New Laboratory Short Encapsulation Pull Test
By Paul C. Hagan, Jianhang Chen, Serkan Saydam
"Modified cable bolts are commonly used in underground mines due to their superior performance in preventing bed separation when compared with plain strands. To better test the axial performance of a
Jan 1, 2015
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Laboratory Studies on Creep Behavior of Grouted Tensioned Rebar in Weak Strata
By Joseph Hirschi, Naga S. Y. Tirumalaraju, Aditya Mishra, Anthony (Sam) J. S. Spearing
"Primary roof support in underground coal mines in the USA consists mostly of fully grouted passive rebar or grouted (partially or fully) tensioned rebar. Research conducted at two room-and pillar coa
Jan 1, 2015
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The Development and Planning of Multiple Level Underground Limestone Mines
By Bruce W. King, David A. Newman
"Underground mines have always been an integral part of the limestone industry. However, beginning in the 1990s, the number of underground limestone mines has increased for many reasons including• Str
Jan 1, 2016
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The Design of Primary Ground Support during Roadway Development Using Empirical Databases
By Ry Stone
"There have been many design practices utilised within the coal mining industry to arrive at the minimum densities of primary ground support required during roadway development. This paper demonstrate
Jan 1, 2015
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Combined Effects of Rock Bedding Orientation and Topography on Stresses Around Mine Openings
By Amirhossein Molavi Tabrizi
In this paper we introduce a realistic model for mine openings that explicitly considers the effects of local irregular topography. Also, we consider the effect of entry orientation and rock anisotrop
Jan 1, 2014
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A comparison between two- and three-dimensional numerical models of a Coeur d'Alene District mine
By T. J. McMahon
This Bureau of Mines study describes the development of a large-scale, three-dimensional, finite-element model of a deep-vein Coeur d?Alene District mine. The three-dimensional model was prepared from
Jan 1, 1989
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Understanding and Optimizing the Performance of Passive Primary Support on Coal Mines
By Anthony Spearing
There are approximately 68 million rockbolts installed annually in underground coal mines in the USA (Tadolini and Mazzoni, 2006). The most utilized is the passive fully grouted resin rebar bolt, whic
Jan 1, 2014
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Influence of a Coal Mine Subsidence on An Adjacent Dam
By Nengxiong Xu
The WTZ coal mine is located adjacent to an auxiliary dam in P. R. China. The mining-induced ground movements are calculated using a 3-D numerical procedure based on the finite difference method (FDM)
Jan 1, 2013
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Potential Application of Short Encapsulation Pull Test (Sept) Data to Project Relative Roof Control Risk
By Yoginder Paul Chugh, Jason E. Tinsley
"Over the last five years, the authors have compiled a database of Short Encapsulation Pull Test (SEPT) evaluations from Interior Basin (Basin) coal mines. Typically, SEPT data are analyzed to obtain
Jan 1, 2016
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Economic Evaluation Of Subsidence Damage Mitigation Techniques
By David C. Johnson
Coal mining in Illinois has resulted in many structures being exposed to subsidence damage. Damage mitigation techniques (DMT) applied in the foundation design/construction have proven successful in m
Jan 1, 1993
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Risk Assessment: Multiseam - Single Seam Mining
By L. Munsamy
The bulk of primary mining at the Anglo Coal's Bank Colliery was carried out by drill and blast method, in a bord and pillar layout exploiting the No. 2 Seam. Secondary extraction, top/bottom coa
Jan 1, 2004
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Pre-Driven Experimental Longwall Recovery Room Under Weak Roof Conditions - Design, Implementation, and Evaluation
By Stephen Tadolini
Reduction in the time required and improvements in safety during a longwall face move have compelled coal mine operators to examine and use pre-driven longwall recovery rooms. While this concept is no
Jan 1, 2002
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A Step Towards Understanding The Behaviour Of Wider Roadways In South African Collieries
By George B. Quaye
Conventionally, roadways in South African collieries are 6 to 7 m wide. This dimension is chosen so as to allow maneuvrability of appropriate mine machinery and equipment, to meet production requireme
Jan 1, 2001
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Systematic Principles of Surrounding Rock Control in Longwall Mining within Thick Coal Seams
By Zhaohui Wang, Jiachen Wang
"Effective surrounding rock control is a prerequisite for realizing safe mining in underground longwall faces. In the past three decades, longwall top-coal caving mining (LTCC) and single pass large h
Jan 1, 2018
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Safe Mining Evaluation of Coal Seam between Abandoned Upper and Lower Room-and-Pillard Mines
By Guorui Feng, Min Zhang, Yi Luo, Jian Yang, Yujiang Zhang, Junwen Bai
"Safe mining of coal seam sandwiched between abandoned upper and lower room-and-pillared mines (ULPM) ·is increasingly becoming the focus of attention in recent years, which is closely related to the
Jan 1, 2016