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Ground Response As a Longwall Advances Into a Backfilled Recovery Room under Low Cover
By David F. Gearhart
A cooperative study was conducted between Signal Peak Energy and the National Institute for Occupational Safety and Health (NIOSH) to evaluate the behavior of a pre-driven recovery room under less tha
Jan 1, 2014
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Comparison of L-Band and X-Band Differential Interferometric Synthetic Aperture Radar for Mine Subsidence Monitoring in Central Utah
By Jessica M. Wempen, Michael K. McCarter
"Differential Interferometric Synthetic Aperture Radar (DlnSAR), a satellite-based remote sensing technique, has potential application for measuring mine subsidence on a regional scale with high spati
Jan 1, 2016
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Advanced Surveying Method For Measuring Roof Convergence
By M. Zaki Rashad
In this paper, if three slant distances are measured from three given points of known coordinates to an unknown point, the position of this point (X, Y, and Z coordinates) can be determined. A compute
Jan 1, 1990
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Strata Behavior Monitoring of the Sub-Inclination Fully Mechanized Top-Caving Face in Steeply Dipping Extra Thick Coal Seam
By Dongfeng Yun, Zhu Liu, Wendong Cheng, Zhendong Fan, Dongfang Wang, Yuanhao Zhang
"For the purpose of studying the strata behavior due to multislicing top coal caving longwall mining along-the-strike direction in steeply dipping extra thick coal seams, the shield support pressures
Jan 1, 2016
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Application of Laser Scanning for Rock Mass Characterization and Discrete Fracture Network Generation in an Underground Limestone Mine
By Juan J. Monsalve, Nino Ripepi, Richard Bishop, Jon Baggett
"Terrestrial laser scanning (TLS) is a useful technology for rock mass characterization. A laser scanner produces a massive point cloud of a scanned area, such as an exposed rock surface in an undergr
Jan 1, 2018
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Methods of Designing Mechanical Roof Bolting in Horizontally Bedded Strata (7261e3ed-3657-491d-b3f5-21e326427bd6)
By David H. Y. Tang
The reinforcement mechanism of suspension effect is analyzed based on beam-column theory. The equations of the maximum bending stress, deflection and transferred bolt load for the bolted roof strata
Jan 1, 1984
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Study of the Backfill Confined Consolidation Law and Creep Constitutive Model under High Stress
By Zhikai Wang, Wensheng Lyu, Peng Yang
"To better understand the mechanical behavior of the compression deformation of backfill under high stresses corresponding to large depths, consolidation compression tests were performed for cemented
Jan 1, 2017
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Field Measurements of Overburden Strata Deformation Response to Longwall Mining
By Xinzhi (Thomas) Du
"In order to monitor the overburden strata deformation over a longwall mining area in the Pittsburgh Coal Seam, three boreholes were drilled across the longwall panel. Each borehole employed multiple-
Jan 1, 2018
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Case Study Of Stability Investigations Related To Shallow Underground Mining Of Iron Ore In The United Kingdom
By S. F. Smith
Following a roof beam collapse on a major production district at the British Steel Corporation's Dragonby Iron Ore Mine, Scunthorpe, South Humberside, UK, rock mechanics investigations were under
Jan 1, 1995
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Effects Of Mining On Underground Infrastructures In The German Hard Coal Sector
By Anton Sroka
The German hard coal production predominantly derives from underground multiseam mining activities. Beside common surface damages, ?inner mine damages? on underground infrastructures (i.e. main roads,
Jan 1, 1999
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Full-Scale Performance Evaluation of Mobile Roof Supports
By Thomas M. Barczak
The performance characteristics of Mobile Roof Supports (MRS's) were evaluated through full-scale testing in the Strategic Structures Testing Laboratory at the National Institute for Occupationa
Jan 1, 1997
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Roof Span Design for Underground Stone Mines
By Essie Esterhuizen, John Ellenberger, Dennis Dolinar
"Underground stone mines in the United States use the room-and- pillar method of mining. The stability of the roof between pillars determines the mining dimensions and size of equipment that can be us
Jan 1, 2010
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Strata Control Investigations During Fully Mechanized Coal Pillar Extraction in Indian Coalfield
By Rajendra Singh
Considering the importance of a fully mechanized depillaring operation, the Indian coal mining industry has introduced a number of such depillaring operations at depths of cover ranging from 60 m to 3
Jan 1, 2014
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Simulation Test on Accumulation Laws of Paste-Like Slurry in Cavity Goaf of a Coal Mine
By Boqiang Wu, Ganggang Xu, Xiaodong Wang, Hai Wang, Shibin Zhu
"Using a paste-like slurry as a filling from the ground surface to the goaf, artificial pillars can be built in the cavity goaf to support the goaf roof to prevent roof collapse and ground subsidence.
Jan 1, 2018
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Roof Movement and Loading for Top-Coal Caving Longwall Mining in Extremely Inclined Thick Coal
By Shengliyang Yang, Jinghu Yang, Jiachen Wang, Xiaomeng Li
"Safe and efficient mining of extremely inclined thick coal seams less than 20m thick is one of the new challenges in China coal industry. In recent years, the extremely inclined thick coal seams have
Jan 1, 2016
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Strata Movement Around Large Mining Height Face Area with Fully Mechanized Method in Steeply Dipping Thick Seam
By Yongping Wu
The steeply dipping coal seams in this paper refer to those with the angle of inclination ranging from 35° to 55°. The reserves of the steep coal seams account for approximately 15%~20% of the total c
Jan 1, 2014
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Instrumentation of a Roof Bolter Machine for Void Detection and Rock Characterization
By Soheil Bahrampour
Void detection and identification of bed separation while drilling holes in rocks for roof bolting can be a great source of information for the evaluation of ground conditions and adjustment of ground
Jan 1, 2013
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Trial of Small Gateroad Pillar in Top Coal Caving Longwall Mining of Large Mining Height
By Kun Li, Shuaishua Yue, Huigui Li, Yuan Ruifu, Yongxiang Xu, Huamin Li
"Coal seams in Tashan Mine of Datong Coal Group in China average 49.2 ft (15m) thick and have been mined by the top coal caving longwall mining method of large mining height. Mining height was 12.5 ft
Jan 1, 2015
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Introduction to Rock Strength Borehole Probe (RSBP) for Estimation of Rock Strength in Roofbolt Drill Holes
By I. Sedat Buyuksagis, Jamal Rostami, Ali Naeimipour
"Improving the safety of underground openings and optimizing ground support systems requires reliable ground characterization. This includes understanding the joints, discontinuities, and rock strengt
Jan 1, 2016
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Laboratory Investigation of Confinement-Dependent Mechanical Behavior of a Utah Coal
By Bo-Hyun Kim, Steve Berry, Mark K. Larson
"When coal pillar bursts occur, they involve the sudden expulsion of coal and rock into the mine opening. These events occur when relatively high stresses in a coal pillar, which serve as support in u
Jan 1, 2018