可拓法评估煤矿瓦斯爆炸易发性

Extension Assessment of Proneness of Gas Explosion in Coal Mines

为了量化煤矿瓦斯爆炸的可能性,并为防治瓦斯爆炸提供量化指标,借鉴可拓学原理,对煤矿瓦斯爆炸易发性进行预评估。首先,详细阐述可拓学评估原理;接着,为了验证煤矿瓦斯爆炸易发性可拓评估的可行性,结合某一煤矿实例,比选煤矿瓦斯爆炸易发性的评价指标,并确定煤矿瓦斯爆炸易发性的分类标准,构建煤矿瓦斯爆炸易发性评估的经典域、节域和物元;然后,为了避免确定指标权重的人为主观因素的影响,提出用简单关联函数确定指标权重;最后,计算煤矿瓦斯爆炸易发性的关联函数值和关联度,确定瓦斯爆炸易发性的等级及其变量特征值。经计算,煤矿爆炸易发性的可拓评估结果为"很小"等级。同时,为了验证可拓评估结果的合理性,将其与模糊评估进行比较,两者所得评估结果相一致。从而表明:将可拓学应用于煤矿瓦斯爆炸易发性评估是合理可行的。

In order to qualify possibility of gas explosion and offer quantitative factors for gas explosion prevention, extension theory is applied to pre-assessing proneness of gas explosion in mines. Firstly, the extension theory is described. Secondly, some critical factors are selected and the classification of proneness is divided into four degrees, while the classical and limited matter-elements of vulnerability assessment are set up in a coal mine to test feasibility of extension assessment. Thirdly, weight of factors is determined using simple dependent function to avoid the effect of subjective factor of human in practices. Finally, proneness degree and the degree ＇s Eigen value are obtained by the definition of correlation function. The result of assessment is second degree, that is, the proneness of gas explosion is very small in accordance with results of fuzzy assessment. Therefore, the extension theory is more effective and practical in pre-assessing the proneness of gas explosion.