煤巷围岩稳定性加权平均评价方法研究

The research on the methodology of weighted average evaluation for surrounding rock stability of tunnel

煤巷围岩稳定性评价是判断巷道支护难易程度和进行支护设计的依据。在对煤巷围岩稳定性影响因子和评价指标进行分析选取的基础上,提出了多因素单一综合指标值评价方法,运用层次分析法确定评价因子权重,用加权平均法建立单一综合指标值计算模型和计算方法。研究结果表明,煤巷围岩稳定性加权平均评价方法能科学地反映围岩的稳定特征,为煤巷围岩控制及支护设计提供了可靠依据。

Surrounding rock stability evaluation of coal tunnel is the basis for judging the level of support difficulty and carrying on support design. Based on analysis and selection of the influence factors on surrounding rock stability and evaluation index, this article proposed an evaluation method of multi-factor single comprehensive index value. AHP Analytic Hierarchy Process is utilized to determine the weights of evaluation factor and weighted average method is to establish calculation models and calculation methods for single comprehensive index value. The results showed that the method of weighted average evaluation for surrounding rock stability of coal tunnel can reflect the stability characteristic of surrounding rock scientifically and provide a reliable basis for rock conlrol and support design.