Results 41 - 50 of 234

• Analysis of ARMPS2010 Database with LaModel and an Updated Abutment Angle Equation
  1/1/2020 - Peer reviewed journal articles
  A paper presenting a new equation for calculating accurate abutment angles for deeper mining cases. The new equation was tested using both ARMPS2010 and LaModel for the entire case history database of ARMPS2010.
• Influence of Longwall Mining on the Stability of Gas Wells in Chain Pillars
  1/1/2020 - Peer reviewed journal articles
  The article presents seven cases of conventional gas wells within chain pillars and discusses how numerical modeling can provide a more quantifiable approach to assess the stability of the gas wells.
• Ground Stress in Mining (Part 2): Calibrating and Verifying Longwall Stress Models
  1/1/2020 - Reports of Investigations
  This part 2 of a two-part series describes ground stress in mining by calibrating and verifying longwall stress models.
• Loading Characteristics of Mechanical Rib Bolts Determined Through Testing and Numerical Modeling
  1/1/2020 - Peer reviewed journal articles
  A study of the loading characteristics of mechanical bolts (stiffness and capacity) installed in coal ribs at five underground coal mines.
• A Case Study of the Stability of a Non-typical Bleeder Entry System at a U.S. Longwall Mine
  1/1/2020 - Peer reviewed journal articles
  An article detailing observations of the non-typical bleeder entries of a moderate depth longwall panel, with a primary focus on the extent and magnitude of the abutment loading.
• Ground Stress in Mining (Part 1): Measurements and Observations at Two Western U.S. Longwall Mines
  1/1/2020 - Reports of Investigations
  This part 1 of a two-part series describes ground stress in mining based on measurements and observations at two western mines.
• Developing a Virtual Reality Environment for Mining Research
  8/1/2019 - Peer reviewed journal articles
  This paper describes the features of VR Mine, a NIOSH-developed a virtual reality framework that allows the rapid generation of VR software applications for use in research.
• Investigating the Impact of Caving on Longwall Mine Ventilation Using Scaled Physical Modeling
  6/10/2019 - Peer reviewed journal articles
  An article discussing a study conducted in NIOSH's Longwall Instrumented Aerodynamic Model (LIAM) to investigate the gob-face interaction, airflow patterns within the gob, and airflow dynamics on the face for varying roof caving characteristics.
• Mechanisms of Coal Dust Explosions and Their Prevention
  4/8/2019 - Contracts and cooperative agreements
  A contract to explore when and how a secondary dust explosion initates and propagates.
• Effect of Discontinuity Dip Direction on Hard Rock Pillar Strength
  4/2/2019 - Peer reviewed journal articles
  A study on the effect of the discontinuity dip direction on square and rectangular hard rock pillars.