Best Practices for Dust Control in Metal/Nonmetal Mining By Jay F. Colinet, Andrew B. Cecala, Gregory J. Chekan, John A. Organiscak, and Anita L. Wolfe DEPARTMENT OF HEALTH AND HUMAN SERVICES Centers for Disease Control and Prevention National Institute for Occupational Safety and Health Office of Mine Safety and Health Research
After their consideration of the " Hand Pump " as a coal face dust sampler [this Bulletin, 1958, v. 33, 668] the authors continue with a critical assessment of the " British Konimeter " as a dust sampling instrument in preparatory work, where both coal and rock may be present. They show that with the standard technique of counting, the dust spot on the disk is often decentred, leading to...
Real time aerosol monitor, gravimetric dust sampler, personal dust sampler, konimeter with projector for studying the air borne respirable dust concentration in mine air. Digital sound level meter with recorder, for studying noise levels in mines and mining areas.
(2) The sampling devices (tyndalloscope, konimeter, and BATI) and methods used to determine the dust concentrations in mines. (3) The systems of classifying hazardous and safe dust levels in mines. (4) The research facilities devoted to theoretical and applied work on .
itoring of the mining environment was obtained for the mines under study. The data (n=16678) was in the form of dust counts from various mine worksites such as loading bay and crushers and processes like lashing and drilling, using the Rand Konimeter for 'snap' sampling. It was taken by occupational hygienists and qualified tech
Met One Instruments' BT‐645 Portable Dust Monitor has been designed to continuously measure and record particulate information for indoor work place and public space environments. Our BT645 optical sensor, matched electronics and backlit display, are enclosed in a rugged metal enclosure to protect the instrument during normal daily use.
Apr 08, 2012· Mining objective. 1. Mining EngineeringQ1. Which cut is used for solid blasting in Indian coal Mines a) Fan cut b) burn cut c) wedge cut d) drag cutQ2. Permitted explosives are safe to use because a) They have less strength b) they have low velocity of detonation c) they do not produce much noise during blasting d)...
Some of the "new" gravimetrictype instruments, such as the Institute of Occupational Medicine (IOM) sampler, do not yield any additional information on respirable dust or help the mining industry as the existing gravimetric samplers are capable of collecting the necessary personal exposure data;
of konimeter dust counts taken in the major mine types of gold, uranium, and nickel. The guidelines used in those years for assessment of konimeter counts were based on percent silica in the airborne total dust. Table I(18) shows the konimeter count guidelines used in the mines in those periods. The
However, coal production, like all other conventional mining activities, creates dust in the workplace. Respirable coal mine dust (RCMD) comprises the size fraction of airborne particles in underground mines that can be inhaled by miners and deposited in the .
The deleterious effect on human beings of dust in mine air is wellknown. It is the duty of engineers, therefore, to take measures to eliminate it. It is now definitely established that of all the various types of dust encountered in mine air, silica dust is the most harmful. This dust, if inhaled over a period of time, causes the disease, silicosis,
sampler, personal dust sampler, konimeter with projector, for studying the air borne respirable dust concentration in mine air. o Experimental setup, to study coaldust explosion hazard. o Mine ventilation computation laboratory, for computation of ventilation problems, is a part of the Mine Ventilation and Environment Laboratory.
Konimeter is portable dust sampling instrument that can be used in .Lmost any situation in mine or plant; construction specifications that affect sampling consistency and efficiency.
basis for its proposal to lower the permissible exposure limit for respirable coal mine dust. MSHA primarily based its proposed new limit on two reports and six epidemiologic studies, which each concluded that lowering the limit on exposure to coal mine .
Reported dust exposure measurements at the two mines were of a crosssectional design. At each mine, bulk and personal respirable dust samples were collected at scheduled areas. Scheduled areas are production areas of the mine where mining regulations of the Zambian mining regulatory authorities apply. In these areas, the main production
Africa since the 1930s, dust was collected with a konimeter (Le Roux, 1970; Cherrie and Aitken, 1999). A small volume of air (, 5 cm3 captured in less than a second) was collected (impacted) onto a small area of a glass slide coated with adhesive. Total dust particles were counted and expressed as dust particles per cubic centimeter.
for the proper planning of dust sampling and dust suppressionprocedures. It mustbeemphasizedthat the discussion is concerned only with dusts which are ofsuch low solubility that, if they are dissolved at all, their rate of solution is very low compared with their rate of inhalation and deposition in the lung. Examples of such dusts are quartz andcoal,
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