Results 471 - 480 of 646

• Factors Affecting the Location of Methanometers on Mining Equipment
  6/1/2001 - Conference papers
  This publication develops criteria for selecting the best machine locations for monitoring methane and gives recommendations for revising methane action levels for alternative sampling locations.
• Design of Primary Roof Support Systems in U.S. Coal Mines Based on the Analysis of Roof Fall Rates
  6/1/2001 - Conference papers
  A study is described where information was collected at 37 coal mines on roof falls and other geotechnical, mining, geologic, and roof bolting factors. A statistical analysis was conducted on the data with roof fall rate as the outcome variable.
• Laboratory Evaluation of a Canopy Air Curtain for Controlling Occupational Exposures of Roof Bolters
  6/1/2001 - Conference papers
  Testing at NIOSH assessed the effectiveness of a canopy air curtain for controlling occupational exposures to respirable silica and coal dusts.
• Effects of Water Sprays and Scrubber Exhaust on Face Methane Concentrations
  6/1/2001 - Conference papers
  Research to determine how machine-mounted water sprays and a scrubber interact to reduce methane levels and what spray configurations provide the best face ventilation when used with a scrubber.
• Design Considerations for the Next Generation of Longwall Shields
  6/1/2001 - Conference papers
  The purpose of this paper is to set goals for the future generations of longwall shields.
• Test Report on the Machine-Mounted Continuous Respirable Dust Monitor
  6/1/2001 - Conference papers
  The machine-mounted continuous respirable dust monitor (MMCRDM) is a fixed-location area sampling device developed for possible use at the working face of an underground coal mine. decades. Recently, an extensive series of laboratory and underground tes...
• Overview of Ground Control Research for Underground Coal Mines in the United States
  6/1/2001 - Conference papers
  NIOSH has developed an entire toolbox of computer programs that have been effectively transferred to the mining community.
• The Modified Direct Method: A Solution for Obtaining Accurate Coal Desorption Measurements
  5/1/2001 - Conference papers
  This paper covers the development of NIOSH's modified direct method to measure the gas content of coal samples.
• An Approach to Identify Jobs for Ergonomic Analysis
  3/1/2001 - Conference papers
  This paper describes the use of four sources of data (injury records, the Nordic Standardized Musculoskeletal Questionnaire, supervisor interviews and management concerns) to prioritize jobs for ergonomic analysis.
• Discharge Water Handling and Treatment: Problems and Solutions at a Large Pittsburgh Seam Coal Mine
  2/1/2001 - Conference papers
  A large Pittsburgh seam longwall mine had begun to develop in a different direction from its original portal area. Several options were investigated to handle the anticipated discharge water required for continued use of the original portal area.