Prediction of longwall methane emissions: an evaluation of the influence of mining practices on gas emissions and methane control systems.
NIOSH 1999 Oct; :1-37
The primary purpose of this field study was to predict the methane emission consequences of mining longwall panels of greater face width in the Pochontas No. 3 Coalbed in Virginia. Mines were to be increased from 229 to 305 m (750 to 1,000 ft). However, since historically high methane emissions from the longwall face and gobs were already being experienced, there was a concern for further increases in methane emission rates. If preferables from a safety perspective to be prepared in advance, either with increased ventilation airflow, or with additional methane drainage. The bleeder and methane drainage systems associated with the two study panels were also evaluated to fully characterize the methane liberation patterns and control system performance for each study area.
Mining-industry; Mine-gases; Methane; Emission-sources; Coal-gas; Coal-mining; Control-systems; Statistical-analysis; Monitoring-systems; Measurement-equipment; Work-practices; Longwall-mining
Numbered Publication; Report of Investigations
NTIS Accession No.
(NIOSH) 99-150; RI-9649
National Institute for Occupational Safety and Health