Aug 24, 2016· Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove dust and noxious gases (typically NOx, SO2, methane, CO2 and CO) and to regulate temperature The source of these g.
In the US, main ventilation systems in coal mines always employ the mine entries to move air, at least one entry for intake air and at least one entry for return air (Figure 1) Ductwork is never used in a main ventilation system This reliance on intake and return mine entries rather than ductwork makes possible the movement of large air .
MINE VENTILATION SYSTEMS Ventilation is the control of air movement, its amount, and direction Although it contributes noth - ing directly to the production phase of an operation, the lack of proper ventilation often will cause lower worker efficiency and decreased productivity, increased accident rates, and absenteeism
From Scotia to Brookwood, fatal US underground coal mine explosions ignited in intake air courses Thomas H Dubaniewicz, Jr * National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, PO Box 18070, Pittsburgh, PA 15236
JENNMAR offers a complete line of belt hangers to be used for hanging belt structures within the mine The following table shows some typical belt hanger assemblies that are available and used throughout the mining industry If you require a specific or customized assembly, our experienced team of ,
He should keep in touch with proposed development work and have ready ventilation plans together with necessary equipment, supplies, etc He should take measures to prevent return vitiated air from mixing with intake air shafts; in some so-called well-ventilated mines 50 to 75 per cent, of the air sent to the workers is recirculated vitiated air
Chapter 18 VENTILATION I Introduction , cross-sectional area is roughly uniform throughout the mine, air travels the shortest possible distance between two points More air volume will travel the , if the active working face area is at 4 or 8 or 12, and diesel equipment is being operated in that area, overexposure to diesel particulate .
Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 06–10 m (2 ft 0 in–3 ft 3 in) thick) The longwall panel (the block of coal that is being mined) is typically 3–4 km (19–25 mi) long and 250–400 m (820–1,310 ft) wide
Glossary of coal mining terminology Jump to , An inset is an opening part way down a shaft giving access to intermediate levels of a mine Intake An intake airway is one along which fresh air travels into the mine J Jenkin A jenkin is a narrow excavation driven through a pillar of coal
Where coal is dumped at or near air-intake openings, provisions shall be made to avoid dust from entering the mine (i) Every operator of a coal mine shall provide program, approved by the Secretary, of training and retraining of both qualified and certified persons needed to ,