Results 411 - 420 of 646

• Evaluating Techniques for Monitoring Rock Falls and Slope Stability
  8/1/2002 - Conference papers
  Several remote-sensing technologies are being evaluated as tools to monitor slopes for hazards and to assess slope stability.
• The NIOSH Shield Hydraulics Inspection and Evaluation of Leg Data (Shield) Computer Program
  8/1/2002 - Conference papers
  A high percentage of longwall shields, which provide ground control in mines, operate well below the rated support capacity due to hydraulic malfunctions. NIOSH developed a computer program to identify shields not performing to rated specifications.
• Stress Measurements for Safety Decisions in Longwall Coal
  8/1/2002 - Conference papers
  The goal of the research described here is to develop a stress monitoring system that will provide immediate information to mine managers for making daily safety decisions as areas of poor ground are mined through.
• A Complexity Assessment Methodology for Programmable Electronic Mining Systems
  8/1/2002 - Conference papers
  Mining is now using surprisingly complex programmable electronic (PE) systems. NIOSH is conducting research to develop a quantitative complexity assessment methodology which will help realize simpler, safer systems; easier to validate and verify.
• Anchorage Pull Testing for Fully Grouted Roof Bolts
  8/1/2002 - Conference papers
  Despite its potential importance, there is no widely accepted anchorage test for fully grouted roof bolts. Recent studies using short encapsulation pull tests are described.
• The Introduction of Roof Bolting to U.S. Underground Coal Mines (1948-1960): A Cautionary Tale
  8/1/2002 - Conference papers
  The story of how roof bolting was implemented by the mining industry, but took so long to live up to its promise, is a fascinating example of the interaction between economics, technology, regulation, and science. It still has important lessons for today.
• Developments in Sealant Support Systems for Ground Control
  8/1/2002 - Conference papers
  NIOSH has been evaluating developments in sealant support systems for ground control. This paper reviews current technology in shotcrete and membrane development, evaluates a long-term study of sealant materials, and examines installation practices.
• Silica Dust Sources in Underground Limestone Mines
  8/1/2002 - Conference papers
  The NIOSH Pittsburgh Research Laboratory is involved in research to identify silica dust sources and generation in underground metal/nonmetal mines. A summary of sampling procedures, resulting data, and methods being investigated to reduce silica dust w...
• Deep Cover Pillar Extraction in the U.S. Coalfields
  8/1/2002 - Conference papers
  A study is described with the objective of evaluating the various methods and strategies by which panels, production pillars and barrier pillars are developed and extracted under deep cover, and to develop appropriate design guidelines.
• Detecting Problems With Mine Slope Stability
  8/1/2002 - Conference papers
  Slope stability accidents are a leading cause of fatalities at U.S. surface mines. NIOSH is conducting research to reduce these fatalities. This paper presents some of the research and potential new technologies for slope monitoring and design.