Search Documents
Search Again
Search Again
Refine Search
Refine Search
-
Sublevel Caving Mining Method for Extra-Thick Coal Seams
By H. Nan
Using the case of Qianqiu Mine, Yima Coal Mining Administration, theoretical analysis, laboratory physical simulation, and underground observation were performed to study the major parameters for full
Jan 1, 2006
-
The Initial Collapse of the Overburden Over Longwall Panels
By Gennaro Marino
Documented case histories are studied where data were found on the initial collapse of the overburden above the longwall panels. Under this scenario, the most controlled conditions exist for assessing
Jan 1, 1987
-
The Contributions of the Alpha Foundation to Ground Control Research and Development
By Tom Barczak, Julian Restrepo, Zach Agioutantis
"The Alpha Foundation for the Improvement of Mine Safety and Health, Inc. (Foundation) was established as part of a Non-Prosecution Agreement (Agreement) entered in December 2011 by the United States
Jan 1, 2016
-
Computer Modeling Of Yield Pillar Behavior Using Post-Failure Criteria
In this paper, the plastic increment theory was applied in a 2-D finite element model, and a generalized Von Mises yielding criterion adopted to simulate the progressive failure of coal pillars. Exten
Jan 1, 1988
-
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
-
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
-
Microseismic Monitoring In The Sydney Coalfield
By G. R. Corbett
Between 1977 and 1984, No. 26 Colliery, at Glace Bay in the Sydney Coalfield, suffered from a series of 37 rock/gas outbursts. These events were characterized by the complete pulverization of a sandst
Jan 1, 1994
-
Application of Phenolic Foam in Longwall Mining
By Marc Arl
Failures of the face and roof above longwall shields have caused days and sometimes weeks of lost production. A common recovery method for these failures has been to pump light weight cementitious gro
Jan 1, 2005
-
Influences of Longwall Subsidence on a Guyed Steel Tower - A Case Study
By Yi Luo
The potential influences of mining subsidence on structural stability, integrity and functionality of guyed tower structures have not been systematically studied before. This paper presents a ease stu
Jan 1, 2003
-
Mining Method For Extracting An Eight Metre Coal Horizon Containing A Sandstone Layer
By Freddie Hunter
An underground mining method for extracting an eight metre (26') coal horizon, containing a sandstone layer. A decrease in the thickness of the rock strata between the number two and number th
Jan 1, 2003
-
A Comprehensive Computer Model For Predicting Dynamic Subsidence For Longwall Operations
By Y. Luo
This paper presents a number of mathematical models for predicting the different phases of the complete surface subsidence process associated with underground longwall mining. A computer program devel
Jan 1, 1992
-
Monitoring Of The Interaction Effects Over A Longwall Panel In The Sydney Coalfield, Nova Scotia
By Peter Cain
The Phalen Colliery in the Sydney Coalfield is extracting the 2.6 m thick Phalen Seam by the panel and pillar longwall retreat method. Abandoned workings occur in the Harbour Seam 140 m above and over
Jan 1, 1993
-
Strength and Deformation Characteristics of Coal under Cyclic Loading
By Yongjie Yang
Experimental study on the strength and deformation characteristics of coal under cyclic loading provides guidance for designing coal pillar which is subjected to repeated mining influence during minin
Jan 1, 2006
-
Time–Lapse Photogrammetric Monitoring of an Underground Stone Mine
By Brent A. Slaker, Michael Murphy, John Ellenberger, Erik Westman
"Photogrammetry, as a tool for monitoring underground mine deformation, is an alternative to traditional point measurement devices, and may be capable of accurate measurements in situations where tech
Jan 1, 2015
-
Deformation Development Around Mine Roadways And Simulation Of Roadway Supports
By E. Yasar
This paper describes the use of the sand and plaster physical modelling technique to investigate the deformation around mine roadways using a variety of support methods in a particular form of stress
Jan 1, 1995
-
Longwall Ground Behavior Characteristics In The Illinois Coal Basin - A Field Study
By Zhanjing Yu
Longwall ground behavior in the Illinois Coal Basin was studied in the past (1, 2, 3). Most of the past studies, however, were concentrated on either surface subsidence or underground structural behav
Jan 1, 1994
-
Roof Geology Mapping In Underground Coal Mines
By Daniel W. H. Su
Underground roof geology reconnaissance is being conducted by CONSOL Inc. to enhance mine productivity. Often, roof instability within mine entries is the consequence of highly variable geology that c
Jan 1, 1999
-
Longwall Geomechanics, An Australian Perspective
By Michael Kelly
Longwall mining is the principal method of underground coal mining in Australia, with 70 million tonnes being produced by longwall mines in 1999. However, the mechanisms that control longwall geomecha
Jan 1, 2000
-
Roof Falls And Caving In Longwall Mining Operations
By Kot F. Unrug
Since the introduction of longwall systems, the prediction of roof behavior and support requirements have become the major issue referring directly to safety as well as productivity. In more recen
Jan 1, 1982
-
Numerical Simulation on Microseismicity Due to Mining at One of the Collieries in Australia
Numerical simulation for microseismicity due to mining at one of the collieries in Australia was carried out and the results were compared to the observed microscismicity. 3-D Stress analysis showe
Jan 1, 2001