journal
MENU ▼
Read by QxMD icon Read
search

Mining Engineering

journal
https://read.qxmd.com/read/30573922/field-investigation-to-measure-airflow-velocities-of-a-shuttle-car-using-independent-routes-at-a-central-appalachian-underground-coal-mine
#1
M Shahan, W R Reed, M Yekich, G Ross
Canopy air curtains on roof bolting machines have been proven to protect miners from respirable dust, preventing their overexposure to dust. Another desired application for canopy air curtains is in the compartments of shuttle cars. The challenges faced in developing the design of canopy air curtains for shuttle cars include mine ventilation rates in tandem with the shuttle car tram speeds. The resulting cab airspeeds may exceed 182 m/min (600 fpm), as found in the present study conducted in a central Appalachian underground coal mine by U...
November 2018: Mining Engineering
https://read.qxmd.com/read/30504993/improving-protection-against-respirable-dust-at-an-underground-crusher-booth
#2
J R Patts, A B Cecala, J P Rider, J A Organiscak
The U.S. National Institute for Occupational Safety and Health completed a 15-month study at an underground limestone mine crusher booth that evaluated three research parameters: (1) the effectiveness of a filtration and pressurization system for improving the air quality inside the operator booth, (2) the relative effectiveness of η > 99 and η > 95 experimental prototype filters in the system, and (3) the performance of three different cab pressure monitoring devices. The protection factor was quantified monthly using particle counters in the respirable dust range of 0...
November 2018: Mining Engineering
https://read.qxmd.com/read/30686842/portable-refuge-alternatives-temperature-and-humidity-tests
#3
L Yan, D Yantek
Federal regulations require refuge alternatives in underground coal mines to sustain life for 96 h while maintaining an apparent temperature below 35 °C (95 °F). Research by the U.S. National Institute for Occupational Safety and Health (NIOSH) has shown that heat and humidity buildup is a major concern with refuge alternatives because they have limited ability to dissipate heat, and high internal air temperature and relative humidity (RH) may expose occupants to heat stress. The heat transfer process within and surrounding a refuge alternative is complex and not easily defined, analytically or experimentally...
October 2018: Mining Engineering
https://read.qxmd.com/read/30532342/empirical-engineering-models-for-airborne-respirable-dust-capture-from-water-sprays-and-wet-scrubbers
#4
J A Organiscak, S S Klima, D E Pollock
Airborne respirable coal dust capture by water sprays or wet scrubbers has been studied and developed over many decades as an engineering control to reduce dust exposure in coal mines and combat coal worker pneumoconiosis. Empirical relationships and deterministic models for particular dust capture experiments have previously been devised to show the key parameters involved in airborne coal dust capture. Many of the results from these models show that the significant parameters related to airborne dust capture are water spray pressure, water quantity, water droplet size, relative water droplet-to-dust particle velocity, and total operating air pressure of the scrubber...
October 2018: Mining Engineering
https://read.qxmd.com/read/30397364/imminent-danger-characterizing-uncertainty-in-critically-hazardous-mining-situations
#5
B M Eiter, J Hrica, D R Willmer
■ Mineworkers are routinely tasked with making critically important decisions about whether or not a hazard presents an imminent danger. Researchers from the U.S. National Institute for Occupational Safety and Health collected formative data to investigate mine safety professional perspectives on workplace examinations, which revealed a potential gap in how mineworkers are assessing risk. During interviews, participants revealed not having a systematic methodology for mineworkers to use to determine if a hazard is considered imminent danger...
September 2018: Mining Engineering
https://read.qxmd.com/read/30393395/dust-suppression-hopper-reduces-dust-liberation-during-bulk-loading-two-case-studies
#6
J F Colinet, A B Cecala, J R Patts
After industrial sand has been mined and processed, the finished product is typically loaded into small bags of 45 kg (100 lb) or less, large bulk bags of 454 to 1,361 kg (1,000 to 3,000 lb), or vehicles such as trucks or trains for transport to end users. As the sand is being transferred and loaded, dust can be released into the work environment, potentially exposing workers to respirable crystalline silica. A number of control technologies have been developed and utilized in an effort to reduce dust liberation during loading operations...
September 2018: Mining Engineering
https://read.qxmd.com/read/30319151/estimation-of-metabolic-heat-input-for-refuge-alternative-thermal-testing-and-simulation
#7
T E Bernard, D S Yantek, E D Thimons
Refuge alternatives provide shelter to miners trapped underground during a disaster. Manufacturers must demonstrate that their refuge alternatives meet the U.S. Mine Safety and Health Administration (MSHA) requirements for oxygen supply, carbon dioxide removal, and management of heat from the occupants and mechanical/chemical systems. In this study, miner size and activity level were used to determine the metabolic heat rate, oxygen requirements and carbon dioxide generation that are representative of miners in a refuge situation...
August 2018: Mining Engineering
https://read.qxmd.com/read/30008486/investigation-of-the-influence-of-a-large-steel-plate-on-the-magnetic-field-distribution-of-a-magnetic-proximity-detection-system
#8
J Li, J DuCarme, M Reyes, A Smith
A magnetic proximity detection system is mounted on a mobile mining machine to prevent underground workers from being pinned or struck by machine motion. The system generates magnetic fields around the machine to determine safe working distances. The miner-worn component measures the magnetic field in order to approximate location. Large masses of steel, such as those from mining equipment, can alter the magnetic field distribution. This affects the locational accuracy of the system, thus adversely impacting worker safety...
June 2018: Mining Engineering
https://read.qxmd.com/read/30147149/electromagnetic-interference-from-personal-dust-monitors-and-other-electronic-devices-with-proximity-detection-systems
#9
J Noll, R J Matetic, J Li, C Zhou, J DuCarme, M Reyes, J Srednicki
In April 2016, the U.S. Mine Safety and Health Administration (MSHA) began requiring the use of continuous personal dust monitors to monitor and measure respirable mine dust exposures to underground coal miners. Mines are currently using the PDM3700 personal dust monitor to comply with this regulation. After the PDM3700's implementation, mine operators discovered that it interfered with proximity detection systems, thus exposing miners to potential striking and pinning hazards from continuous mining machines...
May 2018: Mining Engineering
https://read.qxmd.com/read/29780181/dust-control-by-air-blocking-shelves-and-dust-collector-to-bailing-airflow-ratios-for-a-surface-mine-drill-shroud
#10
Y Zheng, W R Reed, J D Potts, M Li, J P Rider
The National Institute for Occupational Safety and Health (NIOSH) recently developed a series of validated models utilizing computational fluid dynamics (CFD) to study the effects of air-blocking shelves on airflows and respirable dust distribution associated with medium-sized surface blasthole drill shrouds as part of a dry dust collector system. Using validated CFD models, three different air-blocking shelves were included in the present study: a 15.2-cm (6-in.)-wide shelf; a 7.6-cm (3-in.)-wide shelf; and a 7...
May 2018: Mining Engineering
https://read.qxmd.com/read/29867256/mineworker-fatigue-a-review-of-what-we-know-and-future-decisions
#11
Tim Bauerle, Zoë Dugdale, Gerald Poplin
No abstract text is available yet for this article.
March 2018: Mining Engineering
https://read.qxmd.com/read/29563650/refuge-alternatives-relief-valve-testing-and-design-with-updated-test-stand
#12
T J Lutz, P T Bissert, G T Homce, J A Yonkey
Underground refuge alternatives require an air source to supply breathable air to the occupants. This requires pressure relief valves to prevent unsafe pressures from building up within the refuge alternative. The U.S. Mine Safety and Health Administration (MSHA) mandates that pressure relief valves prevent pressure from exceeding 1.25 kPa (0.18 psi), or as specified by the manufacturer, above mine atmospheric pressure when a fan or compressor is used for the air supply. The U.S. National Institute for Occupational Safety and Health (NIOSH) tested a variety of pressure relief valves using an instrumented test fixture consisting of data acquisition equipment, a centrifugal blower, ductwork and various sensors to determine if the subject pressure relief valves meet the MSHA requirement...
March 2018: Mining Engineering
https://read.qxmd.com/read/29674789/a-survey-of-atmospheric-monitoring-systems-in-u-s-underground-coal-mines
#13
J H Rowland, S P Harteis, L Yuan
In 1995 and 2003, the U.S. Mine Safety and Health Administration (MSHA) conducted surveys to determine the number of atmospheric monitoring systems (AMS) that were being used in underground coal mines in the United States. The survey reports gave data for the different AMS manufacturers, the different types of equipment monitored, and the different types of gas sensors and their locations. Since the last survey in 2003, MSHA has changed the regulation requirements for early fire detection along belt haulage entries...
February 2018: Mining Engineering
https://read.qxmd.com/read/29416179/foam-property-tests-to-evaluate-the-potential-for-longwall-shield-dust-control
#14
W R Reed, T W Beck, Y Zheng, S Klima, J Driscoll
Tests were conducted to determine properties of four foam agents for their potential use in longwall mining dust control. Foam has been tried in underground mining in the past for dust control and is currently being reconsidered for use in underground coal longwall operations in order to help those operations comply with the Mine Safety and Health Administration's lower coal mine respirable dust standard of 1.5 mg/m3 . Foams were generated using two different methods. One method used compressed air and water pressure to generate foam, while the other method used low-pressure air generated by a blower and water pressure using a foam generator developed by the U...
January 2018: Mining Engineering
https://read.qxmd.com/read/29348700/open-air-sprays-for-capturing-and-controlling-airborne-float-coal-dust-on-longwall-faces
#15
T W Beck, C E Seaman, M R Shahan, S E Mischler
Float dust deposits in coal mine return airways pose a risk in the event of a methane ignition. Controlling airborne dust prior to deposition in the return would make current rock dusting practices more effective and reduce the risk of coal-dust-fueled explosions. The goal of this U.S. National Institute for Occupational Safety and Health study is to determine the potential of open-air water sprays to reduce concentrations of airborne float coal dust, smaller than 75 µm in diameter, in longwall face airstreams...
January 2018: Mining Engineering
https://read.qxmd.com/read/29348699/industrial-internet-of-things-iiot-applications-in-underground-coal-mines
#16
C Zhou, N Damiano, B Whisner, M Reyes
The Industrial Internet of Things (IIoT), a concept that combines sensor networks and control systems, has been employed in several industries to improve productivity and safety. U.S. National Institute for Occupational Safety and Health (NIOSH) researchers are investigating IIoT applications to identify the challenges of and potential solutions for transferring IIoT from other industries to the mining industry. Specifically, NIOSH has reviewed existing sensors and communications network systems used in U.S...
December 2017: Mining Engineering
https://read.qxmd.com/read/29348698/effects-of-fame-biodiesel-and-hvord-on-emissions-from-an-older-technology-diesel-engine
#17
A D Bugarski, J A Hummer, S E Vanderslice
The results of laboratory evaluations were used to compare the potential of two alternative, biomass-derived fuels as a control strategy to reduce the exposure of underground miners to aerosols and gases emitted by diesel-powered equipment. The effects of fatty acid methyl ester (FAME) biodiesel and hydrotreated vegetable oil renewable diesel (HVORD) on criteria aerosol and gaseous emissions from an older-technology, naturally aspirated, mechanically controlled engine equipped with a diesel oxidation catalytic converter were compared with those of widely used petroleum-derived, ultralow-sulfur diesels (ULSDs)...
December 2017: Mining Engineering
https://read.qxmd.com/read/28936001/characterization-of-airborne-float-coal-dust-emitted-during-continuous-mining-longwall-mining-and-belt-transport
#18
M R Shahan, C E Seaman, T W Beck, J F Colinet, S E Mischler
Float coal dust is produced by various mining methods, carried by ventilating air and deposited on the floor, roof and ribs of mine airways. If deposited, float dust is re-entrained during a methane explosion. Without sufficient inert rock dust quantities, this float coal dust can propagate an explosion throughout mining entries. Consequently, controlling float coal dust is of critical interest to mining operations. Rock dusting, which is the adding of inert material to airway surfaces, is the main control technique currently used by the coal mining industry to reduce the float coal dust explosion hazard...
September 2017: Mining Engineering
https://read.qxmd.com/read/28867831/quick-fixes-to-improve-workers-health-results-using-engineering-assessment-technology
#19
E J Haas, A B Cecala
Personal respirable dust sampling and the evaluation of control technologies have been providing exposure information to the mining industry but not necessarily in a way that shows how technology can be integrated to provide organizational support and resources for workers to mitigate dust sources on site. In response, the U.S. National Institute for Occupational Safety and Health (NIOSH) used previously developed Helmet-CAM technology to design and engage in a behavioral/engineering cooperative intervention to initiate and enhance mine site conversations about the risks and potential occurrences of respirable silica dust exposures on the job as well as provide impetus and solutions for mitigating higher sources of dust...
July 2017: Mining Engineering
https://read.qxmd.com/read/28845058/characterization-of-a-mine-fire-using-atmospheric-monitoring-system-sensor-data
#20
L Yuan, R A Thomas, L Zhou
Atmospheric monitoring systems (AMS) have been widely used in underground coal mines in the United States for the detection of fire in the belt entry and the monitoring of other ventilation-related parameters such as airflow velocity and methane concentration in specific mine locations. In addition to an AMS being able to detect a mine fire, the AMS data have the potential to provide fire characteristic information such as fire growth - in terms of heat release rate - and exact fire location. Such information is critical in making decisions regarding fire-fighting strategies, underground personnel evacuation and optimal escape routes...
June 2017: Mining Engineering
journal
journal
50266
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"