I think it's amazing how different but yet how similar we do things in West Virginia USA be safe brothers run coal
@johncarlon7142
10 жыл бұрын
Great to see a project that is providing coal to industry and also reclaiming land for use after coal spoil disposal when one day there will be no evidence of the mine when the coal has been worked. Enjoyed my time there as project manager on the overland conveyor and transfer point from the new underground mine portal.
@khalidahmad3035
9 жыл бұрын
You should use corrugated plastic mesh for rib support. Unlike steel, the mesh is fire resistant, anti static and because of the corrugation it makes it easier to identify loose rocks. They're also very light and easy to handle
@khalidahmad3035
8 жыл бұрын
Nick you are right in saying that FRAS is not applicable to steel. But i don't have to be an expert to know that a steel mesh is a lot heavier than plastic, and creates spark from metal contacts which is a safety concern in a fire risk environment like underground coal. What i know about the corrugated plastic mesh is that they:- - come in sheet form (just like in sizes of steel mesh) - are strong as up to 50kn/m tensile (steel mesh is typically 40kn/m in a hard rock underground, not sure for coal), and - come with reasonably large apertures about 60mm x 60mm enough size to drill a 28mm dia. hole for a typical 22m dia. rib bolt / dowel on the rib face. If you have a longwall shearer cutting through the block side you will have a problem of steel mesh either:- - damaging the machine or - not cutting through the steel mesh causing enormous downtime to remove the shattered steel from the machine, which means you have to remove them prior to the shearer cutting through which is still an added cost and risk to labour and safety. Many mines are already using plastic mesh rolls nowadays to solve the above problems, but 'rolls' create another problem with its inefficient handling:- - The roll bundle keeps falling after installing every section forward, and - they 'curl back' because they come in roll forms from factory This is why i think the use of corrugated plastic mesh wins over the use of both methods of rib surface support (steel mesh sheets and plastic mesh rolls) on the merits of efficiency, cost, and safety. It doesn't matter if i know nothing or everything about underground works as you say but if my explanation does make sense i would wonder why many underground coal mines are still using steel mesh for rib support if the benefits are so basic and clear.
@MrStaybrown
Жыл бұрын
Who runs a shearer into steel mesh? We usually remove any mesh before ribs take weight. It won't damage the shearer at all but it will get caught on the bits, in the flights, and hang of the belts down the belt line tripping switches. The whole LW and it's people have to be dim and numb.
@mikemer79
11 жыл бұрын
God bless australia
@19501952
2 жыл бұрын
Old Gordonstone had a few #*&@$ in it’s early days. Eg run away C/M down the drift.
@0ldw3lshm4n
6 жыл бұрын
can i visit? :-)
@Paul_Au
3 жыл бұрын
Scab pit!
@steriophonic1
11 жыл бұрын
God bless WALES
@katysimps8941
4 жыл бұрын
් පසුව, ඔහු දුටු ලෙස ඇය බවට පියාසර කරන ලදී
@EncypherUK
11 жыл бұрын
eco blah blah... cows emit methane! haha nice try
@specialized29er86
6 жыл бұрын
Say no to coal and leave it in the ground.
@bendyaerial5940
5 жыл бұрын
Specialized 29er chuck all your electronics in the bin, sell your car, buy a candle and live in a cave then. And if you want to sound really dumb and say you can use wind or solar, how can you make steel without them, knowing that it costs more energy to produce them than it will ever produce in its lifetime. Derrrrrrrrrrr.......
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