Assessing Status of Fire Affected Sealed Panel—A Scientific Approach
摘要
When a fire occurs in an underground coal mine the fire affected panel is sealed and sometimes the whole mine is sealed to control it depending upon its site specific conditions. At this juncture, the mine operator put their utmost effort to keep the mine operative working in other panels of the mine, if available, with due care to the sealed panel. Therefore, at this point of time, it is the duty of the regulatory body to see the status of fire such that activity of the mine can be concentrated in the other part of mine, if available, or in the other ancillary work such as pumping, main fan operation, air sampling and inspection in other sealed off area, if any, etc. Thus scientific agencies put forward their report in two phases. First, gas analysis report spanning over a week or so to determine the status of fire such that other activities of the mine can be resumed. Second, a report containing gas analysis and their interpretation covering a period of six months or more than that. In recent past, a fire occurred in the loose coal of developed workings of No. 3 Seam at SRP 3&3A Incline, Godavari valley coalfield (GVCF), SCCL. Assessment of status of fire has been done in terms of gas concentration, Graham’s ratio, oxides of carbon ratio, Young’s ratio and USBM diagram showing gas explosibility. The paper deals with assessment status report in two phases considering data obtained from two isolation stoppings.