基于优度评价法的煤与瓦斯突出危险性评价

为了对煤与瓦斯突出的危险性进行综合评价,同时避免评价主观性强和各指标间的不相容问题。首先从地应力、瓦斯潜能以及煤的物理性质3个方面出发,针对桐梓某煤矿的3个煤层,选择了影响煤与瓦斯突出危险性的12个指标,将类间标准差法与可拓优度评价相结合建立评价模型;其次根据可拓学方法构建煤与瓦斯突出危险性的物元模型;再次通过可拓优度评价法对物元模型进行求解,同时运用类间标准差法进行权系数的计算,从而得出3个煤层危险性的优度排序,最后与基于熵权的TOPSIS法的结果进行比较。结果表明,该方法客观、明确、计算简单、实用性强。

Risk Assessment of Coal and Gas Outburst Based on Goodness Evaluation Method

In order to assess the risk of coal and gas outburst and avoid the incompatibility of each factor and subjectivity,the twelve indexes of the risk of coal and gas outburst are selected from three aspects including ground stress,gas potential and physical property of coal,a evaluation model based on extension goodness evaluation and Enshi State of different categoried is proposed.Then,a matter-element model of coal and gas outburst risk assessment is built according to extenics method and the matter-element model is solved by using extension goodness evaluation.Indexes weight are calculated by Enshi State of different categories,goodness sort of three coal seam risk is obtained.Finally,this model is compared with the TOPSIS method by entropy weight.The result shows that this method is objective,clear,simple calculation and practicability.