Results 501 - 510 of 618

• Regional Bumps: Case Studies from the 1958 Bump Symposium
  1/1/2010 - Peer reviewed journal articles
  This paper looks at historical descriptions of bumps with regional scale, in the hope that by investigating dynamic failure modes with potential to create the next disaster, that disaster might be averted.
• Reinforcing Coal Mine Roof with Polyurethane Injection: 4 Case Studies
  10/1/2008 - Peer reviewed journal articles
  This paper gives the results of 4 case studies concerning the interaction between polyurethane (PUR) and coal mine roof in order to determine the mechanism of reinforcement, in both highly fractured rock and unfractured rock.
• The Relationship between Elemental Carbon and Diesel Particulate Matter in Underground Metal/Nonmetal Mines in the United States and Coal Mines in Australia
  3/1/2015 - Peer reviewed journal articles
  An article describing an investigation of the relationship between total carbon and elemental carbon from diesel particulate matter samples to determine if a single conversion factor can be used for all metal/nonmetal mines.
• Relationship Between Elemental Carbon, Total Carbon, and Diesel Particulate Matter in Several Underground Metal/nonmetal Mines
  2/1/2007 - Peer reviewed journal articles
  To evaluate how elemental carbon (EC), a surrogate of diesel particulate matter (DPM), predicts DPM, measurements of total carbon (TC) and EC were taken away from potential interferences in four underground metal/nonmetal mines during production.
• Relationship Between Radiated Seismic Energy and Explosive Pressure for Controlled Methane and Coal Dust Explosions in an Underground Mine
  3/1/2012 - Peer reviewed journal articles
  This paper describes the research conducted to quantify a relationship between measured values of radiated seismic energy and peak explosive pressure generated.
• Relationships Between Electrostatic Charging Characteristics, Moisture Content, and Airborne Dust Generation for Subbituminous and Bituminous Coals
  4/1/2000 - Peer reviewed journal articles
  Small scale laboratory pulverizing experiments were performed on humidified coal material sieved to size 6.35 mm (0.250 in) and below to eliminate effects due to inherent planes of weakness (cleats or joints). Experimental factors studied include the co...
• Repeatability of a Checklist for Evaluation Cab Design Characteristics of Heavy Mobile Equipment
  12/1/2007 - Peer reviewed journal articles
  This paper describes a study that assessed the repeatability of a cab design checklist developed to evaluate various design characteristics that can influence exposure to risk factors for musculoskeletal discomfort.
• Reservoir Diagnosis of Longwall Gobs Through Drawdown Tests and Decline Curve Analyses of Gob Gas Venthole Productions
  7/1/2010 - Peer reviewed journal articles
  During longwall mining, fracturing and relaxation in the gob creates new and highly permeable flow paths. The production rate-pressure behavior of a gob gas venthole (GGV) drilled over a longwall panel was analyzed by using multi-rate drawdown and decl...
• Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
  3/1/2009 - Peer reviewed journal articles
  This study presents reservoir and elastic properties of coal measure rocks in the Lower Monongahela Group in Greene County, southwestern Pennsylvania, with results that can be used as data sources for reservoir studies related to methane control.
• Reservoir Simulation-Based Modeling for Characterizing Longwall Methane Emissions and Gob Gas Venthole Production
  7/1/2007 - Peer reviewed journal articles
  This paper presents the development and results of a comprehensive, "dynamic," three-dimensional reservoir model of a typical multi-panel Pittsburgh coalbed longwall mine. Results presented in this paper include a simulation of gas flow patterns from th...