摘要
为弥补现有隧道勘测阶段瓦斯突出评估方法的不足,并为隧道施工提供瓦斯突出的量化指标,借鉴可拓学原理,对隧道瓦斯突出的多指标可拓综合评估进行探讨。首先,建立隧道瓦斯突出的可拓评估流程;接着,结合某一隧道3处煤层的勘测实例,比选隧道瓦斯突出的评价指标,并确定隧道瓦斯突出的分类标准;其次,对定性的评价指标进行量化,并对各指标进行归一化、无量纲化预处理,构建隧道瓦斯突出评估的经典域、节域和物元;然后,为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,计算隧道瓦斯突出的关联函数值和关联度,确定瓦斯突出的等级及其变量特征值。经计算,隧道3处煤层的瓦斯均为"严重"突出,并根据等级变量特征值,得到隧道3处煤层瓦斯突出性的相对大小。同时,将可拓评估结果与D.K值判别法论进行比较,两者所得评估结果相一致。从而表明:将可拓学理论应用于隧道瓦斯突出评估是合理可行的,很好地解决隧道工程瓦斯评估的实际问题。
In order to improve the present methods of quantitatively assessing gas burst during tunnel construction, a comprehensive evaluation method for gas burst in tunnel at the prospecting stage was discussed on the basis of. extension theory. The flow chart of extension assessment is established, and the main influencing factors including the classification of gas burst are preprocessed as dimensionless and used to set up classical and limited matter-elements. A simple dependent function is used to determine the factor weight to avoid human subjective effect. Correlation equations are used to calculate the degree of gas burst and the eigenvalue. The predicted gas burst from three coal layers in a tunnel and the relative degree are obtained, which are in good agreement with the results from using the D.K method.
出处
《土木工程学报》
EI
CSCD
北大核心
2008年第4期81-85,共5页
China Civil Engineering Journal
关键词
瓦斯突出
可拓评估
物元模型
无量纲化
指标权重
gas ejection
extension assessment
matter-element model
non-dimension process
factor weight
