Welcome to our book review site go-pdf.online!
You may have to Search all our reviewed books and magazines, click the sign up button below to create a free account.
Performance of a Polyurethane Core Seal Tested in a Hydrostatic Chamber
nThe National Institute for Occupational Safety and Health (NIOSH)'s Pittsburgh Research Laboratory conducted a full-scale test of a composite polyurethane-aggregate seal in a hydrostatic chamber at the Lake Lynn Experimental Mine. The report details the test results of the composite polyurethane-aggregate seal and provides an analysis of those results in terms of the seal's structural behavior.
Extracting the Science
These research papers also cover a spectrum of innovative technical solutions, including computer-controlled mining equipment, remote monitoring of air quality, and virtual reality training systems.
Guidelines for Permitting, Construction, and Monitoring of Retention Bulkheads in Underground Coal Mines
The National Institute for Occupational Safety and Health (NIOSH) with assistance from MSHA, conducted an extensive review of bulkhead permits submitted to MSHA's technical Support office in Bruceton, PA. This NIOSH Information Circular was developed for operations that need to construct an underground impoundment system, as well as for those that currently operate one. The information contained in this report is geared toward the permitting aspect. However information on monitoring and emergency response planning and training could be useful to operations that currently have underground impoundments.
Recommendations for a New Rock Dusting Standard to Prevent Coal Dust Explosions in Intake Airways
"The workings of a bituminous coal mine produce explosive coal dust for which adding rock dust can reduce the potential for explosions. Accordingly, guidelines have been established by the Mine Safety and Health Administration (MSHA) about the relative proportion of rock dust that must be present in a mine's intake and return airways. Current MSHA regulations require that intake airways contain at least 65% incombustible content and return airways contain at least 80% incombustible content. The higher limit for return airways was set in large part because finer coal dust tends to collect in these airways. Based on extensive in-mine coal dust particle size surveys and large-scale explosion te...
Strengthening Existing 20-Psi Mine Ventilation Seals with Carbon Fiber-Reinforced Polymer Reinforcement
The National Mining Association and the Mine safety and Health Administration requested that the National Institute for Occupational Safety and Health (NIOSH) conduct full-scale evaluations of a recently developed carbon fiber-reinforced polymer (CFRP) reinforcement technique for upgrading existing mine ventilation seals to withstand an explosion pressure of 50 psi or greater. The evaluation was conducted in the NIOSH Pittsburgh Research Laboratory's Lake Lynn Experimental Mine (LLEM). The purpose of the evaluation was to determine the blast resistance of the CFRP reinforcement technique, designed to increase the strength of two types of existing 20-psi-rated in situ mine ventilation seals.
Explosion Effects on Mine Ventilation Stoppings
The National Institute for Occupational Safety and Health (NIOSH) and the Mine Safety and Health Administration (MSHA) conducted joint research to evaluate explosion blast effects on typical U.S. mine ventilation stoppings in the NIOSH Pittsburgh Research Laboratory's (PRL) Lake Lynn Experimental Mine (LLEM). An innovative Australian-designed brattice stopping was also evaluated. NIOSH findings and recommendations are detailed.
