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"Using remote reading instrumentation to improve safety, productivity, " by Samantha Watson, Nathan Owen et al.

ABSTRACT: Accurate and timely monitoring of strata stability in underground excavations is a critical activity that forms part of the fundamental daily mine safety processes and is mandated by law to be carried out in all operations. Coal mine strata monitoring includes the use of instrumentation and observations carried out by personnel. Mechanical tell-tales are an instrument widely used throughout the coal mining industry and are used to measure displacement of roof rock horizons. They comprise of either 2 or 4 reading indicators that are connected by stainless steel wires to anchors secured up a purposely drilled hole and require personnel to read them individually and record displacements manually.
Prompted by the desire to improve safety and provide a system that could offer continuous monitoring of areas within the mine, without the requirement for manual recording of tell-tale data, Moranbah North Mine (MNM) initiated installation of a remote reading monitoring scheme in 201 ....

United States , Moranbah North Mine , Trigger Action Response Plans , Anglo American , Remote Reading Tell Tales , ஒன்றுபட்டது மாநிலங்களில் , மோரன்பாஹ வடக்கு என்னுடையது , தூண்டுதல் நடவடிக்கை பதில் திட்டங்கள் , ஆங்கிலோ அமெரிக்கன் ,

"Filter requirements for Graham's ratio oxygen deficiency" by Snezana Bajic, Sean Muller et al.

ABSTRACT: Graham’s ratio (GR) is used to calculate the amount of carbon monoxide produced in proportion to the amount of oxygen consumed by the coal. It is a useful indicator for Coal Mines to determine the level of coal oxidation and to respond accordingly in the event of spontaneous combustion. The intensity of the coal reaction is related to the carbon monoxide produced and the oxygen consumed (oxygen deficiency). Graham’s ratio is very important as it is often used as a trigger for Trigger Action Response Plans (TARPs) for the management of spontaneous combustion. Samples with a similar composition to air may return a negative or minuscule measured oxygen deficiency unsuitable for Graham’s ratio. The same problem is identified in samples diluted with seam gas or when there are inaccuracies in other measured components when nitrogen is calculated by difference and not directly measured. The issue arises when oxygen deficiency is inadequate and insufficient, where the GR result ....

Coal Mines , Trigger Action Response Plans , Control Room Operator , நிலக்கரி சுரங்கங்கள் , தூண்டுதல் நடவடிக்கை பதில் திட்டங்கள் , கட்டுப்பாடு அறை ஆபரேட்டர் ,