Results 51 - 60 of 128

• Technology News 540 - Field-Expedient Shotcrete Adhesion Test System
  6/1/2011 - Technology News
  To develop a practical method of measuring shotcrete adhesion strength in underground mines.
• Current trends in Reducing Ground Fall Accidents in US Coal Mines
  1/1/2011 - Peer reviewed journal articles
  In recent years, the number of some annual ground fall fatalities has approached zero, indicating that significant progress has been made. However, more progress is needed to reduce injuries caused by rock falling between supports and by rib falls.
• Report on Early Strength Performance of Modern Day Weak Rock Mass Shotcrete Mixes
  2/1/2010 - Conference papers
  NIOSH is investigating the use of shotcrete in weak rock mass mines with the objective of reducing fatalities and injuries resulting from rock fall accidents.
• Ground Failures in Coal Mines with Weak Roof
  1/1/2010 - Peer reviewed journal articles
  An understanding of the geologic and stress conditions which lead to roof falls is necessary to assess the risk of failure and to design roof reinforcement to improve stability.
• The Impact of Ground Control Research on the Safety of Underground Coal Miners: 1910-2010
  1/1/2010 - Conference papers
  This paper describes the impact of ground control research by the Bureau of Mines and NIOSH on the safety of underground coal miners.
• A Hydrodynamics-Based Approach for Predicting the Blast Damage Zone in Drifting as Demonstrated Using Concrete Block Data
  8/1/2009 - Peer reviewed journal articles
  This paper presents a blast design technique based on a hydrodynamic method and introduces modifications to account for different explosives from those used in a calibration test.
• Current Trends in Reducing Ground Fall Accidents in US Coal Mines
  2/1/2009 - Conference papers
  Each of the electronic versions of the MSHA fatality reports since 1995 was analyzed in detail, categorized by the type of the ground fall hazard. The remainder of the paper is devoted to evaluating each of the five largest categories.
• Overview of Coal Mine Ground Control Issues in the Illinois Basin
  12/1/2008 - Peer reviewed journal articles
  NIOSH has been actively gathering ground control information in the Illinois Basin in an effort to understand and control difficult mining conditions and has documented best practices for screen installation.
• Dynamic Failure in Deep Coal: Recent Trends and a Path Forward
  7/1/2008 - Conference papers
  The centerpiece of this project is development of a Dynamic Failure Control Program to monitor evolution of dynamic failure hazards with changing geologic conditions to assure that control and protective measures are appropriately deployed.
• Detecting Strata Fracturing and Roof Failures from a Borehole Based Microseismic System
  7/1/2008 - Conference papers
  This paper describes a case study where a surface-based microseismic system, using triaxial geophones in boreholes drilled from the surface, was deployed at a large limestone mine.