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In the first place, one of the most important goals was accomplished by using the perforator, which was that of mining not only extremely hard coal but also mining occasionally part of the wall and the roof of the layer. Consequently, the perforator is believed to have power enough to succeed in mining layers harder than 400 kilograms per square centimetre, despite its low ratio of weight to power.

Another relevant aim was that of loading the coal correctly onto the reinforced transporter, which was satisfactorily achieved. Furthermore, evidence of the correct functioning of the water cooling system has been given as well as the consequent elimination of the risk of spreading sparks into the environment (which may cause firedamp explosions) and the diminution of the amount of dust inside the seam. One of the main reason why interruptions took place was the penetration of coal through the underside of the protecting panel, preventing the electric cable and the cooling water pipe from working properly. Nevertheless, this problem was solved during the testing by creating lateral windows on the protecting panel in order to avoid the accumulation of coal inside the cable and pipe channels. Because of these problems and other ones, the appliance did not give satisfactory results during the testing period. .

Additional information

Authors: ATERBI, ATERBI, Madrid (ES)
Bibliographic Reference: EUR 17411 ES (1997) 175pp., FS, ECU 30
Availability: Available from the (2)
ISBN: ISBN 92-827-9880-1
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