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Keywords: Coal mine gas, Gas drainage improvement, Underground drilling, Bulli seam . 1. INTRODUCTION ... mining guidelines, and meet the TLV, drilling programs became far more and generally the overall drilling effort intensive increased. It is common for mines operating in the Bulli seam to drill well in excess of 100,000 metres annually.
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Oct 03, 2017· I believe the number is correct but the conclusion is wrong, 1 mine able to power boilers, i set up 1 boiler, 2 steam engines powering 21 electric mining drill and 1 of the drill direct output coal into the boiler, the rest output to chest, constantly over draining power from the setup, the coal in the boiler still increasing.
This conference paper was originally published as Liu, Y, Dunn, P and Hatherly, P, Inseam drilling technologies for underground coal mines, in Aziz, N (ed), Coal 1998: Coal Operators' Conference, University of Wollongong the Australasian Institute of Mining and Metallurgy, 1998, 573581.
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