Study on the method for forecasting dangerousness of coal face and heading face outbursy by two temperature indexes

摘要

In line with the sensitivity of coal drillings temperature and coalbed temperature to the dangerous zone of coal and gas outburst, two temperature sensitive indexes (ΔT_m,Δt_m) for forecasting dangerousness of coal face and heading face outburst are defined, and deal with the foundation on drillings and coalbed temperatures used as sensitive indexes and the principle and method of determining drillings and conlbed temperatures. On the basis of this, we put forward the method for forecasting dangerousness of coal face and heading face outburst by two tempera- ture sensitive indexes and determine the critical values of two temperatures sensitive indexes (ΔT_m=5.5 deg.C, Δt_m=4.5 deg.C) b in-situ observation and requirement for determining sensitive index.