屯兰矿2^#、4^#煤层区域预测突出敏感性指标研究

为了提高屯兰矿防治煤与瓦斯突出的工作效率,确定屯兰矿的区域预测突出敏感性指标及临界值是十分必要的。对屯兰矿2^#、4^#煤层进行突出模拟实验,发现2^#、4^#煤层区域预测瓦斯压力临界值分别位于0.727 MPa、0.718 MPa附近,瓦斯含量临界值分别位于7.689 m^3/t、7.564 m^3/t附近,然后利用Fisher准则判定2^#煤层区域预测临界值为瓦斯压力0.728 MPa,瓦斯含量为7.665 m^3/t;4^#煤层区域预测临界值为瓦斯压力0.716 MPa,瓦斯含量为7.731 m^3/t.最后利用朗格缪尔方程,得出2^#、4^#煤层区域预测突出敏感性指标的敏感序列均为瓦斯压力W大于瓦斯含量P.

Study on Gas Outburst Sensitivity Index of No.2 and No.4 Coal Seams Areas in Tunlan Coal Mine

In order to improve the work efficiency of Tunlan Mine to prevent coal and gas outburst,it is necessary to determine the sensitivity index and critical data for the outburst prediction of Tunlan Mine.Outburst simulation experiments were performed on the No.2 and No.4 coal seams of Tunlan Mine.It was found that the predicted gas pressure critical values of the No.2 and No.4 coal seams were located around 0.727 MPa and 0.718 MPa,respectively,and the critical gas content were located at 7.689 m^3/t and 7.564 m^3/t,and then use the Fisher criterion to determine the predicted critical value of the No.2 coal seam area as a gas pressure of 0.728 MPa and a gas content of 7.665 m^3/t.The predicted critical value of the No.4 coal seam area as a gas pressure of 0.716 MPa and a gas content of 7.731 m^3/t.Finally,using Langermuir equation,it is concluded that the sensitive sequences of No.2 and No.4 coal seam area for prediction prominent sensitivity indicators are all alike:gas pressure W greater than gas content P.