分析影响矿山边坡稳定的主次因素,可为边坡监测和治理提供依据。考虑到寒区矿山开采方式和极端气候因素的影响,在常规影响因素的基础上,引入爆破损伤因子和冻融系数,利用均匀设计的非线性数据评价模型对各因素进行交互试验,研究不同水平值交互作用下边坡稳定性系数的变化情况,并基于灰色系统理论对试验结果进行关联性分析,依据关联度的大小对各因素进行排序。结果表明:黏聚力对寒区边坡稳定性的关联度为0.763,影响程度最大,其次为弹性模量、爆破损伤因子及冻融系数,说明对寒区边坡稳定性影响最大的因素为岩体自身强度因素,但爆破振动和冻融循环作用对寒区矿山边坡稳定性的影响不容忽视。
Abstract
Analysing the primary and secondary factors of mine slope stability could provide basis for the monitoring and governance of slopes. Taking into account the influence of mining type and extreme climate in cold region, we considered blasting damage factor and freezing-thawing coefficient aside from general factors, and then carried out interactive test for all the factors using a nonlinear data evaluation model of uniform design in order to research the variation of slope stability coefficient under different factor levels. Furthermore we adopted grey correlation analysis to analyze the test results, and then sequenced the factors according to their correlation degrees. The results show that cohesion is the greatest influence factor with a correlation degree of 0.763, followed by modulus of elasticity, blasting damage factor and freezing-thawing coefficient, which indicates that rock mass strength has the largest influence on slope stability in cold region, yet the effects of blasting vibration and the freezing-thawing cycle are non-negligible.
关键词
寒区边坡 /
影响因素 /
灰色理论 /
均匀设计 /
敏感性分析
Key words
slope in cold region /
influence factor /
grey theory /
uniform design /
sensitivity analysis
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