A novel cloud model coupled with connection number based on finite intervals for evaluation of surrounding rock stability

作者：Wang, Ming-Wu; Zhu, Qi-Kun; Zhao, Kui-Yuan; Jiang, Hui; Jin, Ju-Liang

来源：Yantu Lixue/rock and Soil Mechanics, 2016, 37(S1): 140-144 and 165.

DOI：10.16285/j.rsm.2016.S1.018

• Classification boundary
• Cloud modeling
• Connection number
• Evaluation indicators
• Finite intervals
• Normal cloud model
• Surrounding rock stability
• Uncertainty relationship

Evaluation indexes of surrounding rock stability are usually in forms with normal distributions in finite intervals, and their classification boundaries are of fuzzy characteristics. So it is hard to interpret these characteristics using a normal cloud model. A novel cloud model coupled with connection number is described here to take into account of the fuzziness and conversion situation of classification boundary, and interval nature of evaluation indicators for surrounding rock. In the model, the connection cloud model in finite intervals is first discussed. Then combined with index weights, a concept of contact probability is introduced to specify the comprehensive certainty degrees of the measured evaluation indicator to various classification grades. The results from case study and comparison with other methods show that the model proposed is feasible and effective;and it can overcome the shortcomings of inability to simulate quantitatively certainty and uncertainty relationships among indicators of interval distribution form from a unit way, so as to extend serviceability for the cloud model.

• 出版日期2016-6-1
• 单位合肥工业大学