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The concept of a regulated, self-monitoring auxiliary ventilation system has already been developed in the laboratory. Signals from the monitoring equipment stipulated by the State Mining Authority of North-Rhine Westphalia are all transmitted to a microprocessor system connected to the auxiliary ventilation system. In this way information is obtained on the working order of the system. If reserves are found to be available, the air supply can be increased for short periods, thus preventing a rise in the methane concentration at the coal face and a potential stoppage. In this follow-up project it was possible to develop such a system for use below ground. A number of remote measuring devices were tested for their suitability in measuring the rate of flow in conduit pipes and the first experience of operating the system is now reported. The concept has proved a success, though on economic grounds it is at present only recommended for the excavation of long headings.

Additional information

Authors: MÜCKE G, Bergbau-Forschung GmbH, Essen (DE);MARZILGER B ET AL., Bergbau-Forschung GmbH, Essen (DE)
Bibliographic Reference: EUR 13100 DE (1990) 63 pp., MF, ECU 4, blow-up copy ECU 8.75
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