基于粗糙集理论和支持向量机的岩爆预测

发布时间：2018-01-17 03:09

本文关键词：基于粗糙集理论和支持向量机的岩爆预测　出处：《中南大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：为了提高不同环境和地质条件下对岩爆预测的准确性,在综合岩爆影响因素的基础上,选取岩石取样处的埋深、岩石单轴抗压强度,岩石单轴抗压强度与抗拉强度比值、围岩最大切向应力与岩石单轴抗压强度比值、岩石弹性变形能指数作为评判指标建立岩爆烈度预测决策表,根据粗糙集理论中的属性约简算法,确定特定地质条件下岩爆的主要影响因素,删除冗余数据,再使用粒子群算法优化支持向量机的参数,通过核函数将岩爆主控因素映射到高维空间,拟合主控因素与岩爆烈度之间的非线性映射关系,建立基于粗糙集理论和粒子群支持向量机(RS-PSOSVM)的岩爆预测模型,并将该模型应用于大相岭隧道的岩爆预测。研究结果表明:该模型具有较高准确率和和较强稳定性;岩爆预测结果与实际结果一致,验证了该模型的可行性。
[Abstract]:In order to improve the accuracy of rock burst prediction under different environment and geological conditions, on the basis of synthesizing the influencing factors of rock burst, the buried depth and uniaxial compressive strength of rock are selected. The ratio of uniaxial compressive strength to tensile strength of rock, the ratio of maximum tangential stress of surrounding rock to uniaxial compressive strength of rock, and the elastic deformation energy index of rock are used as evaluation indexes to establish a decision table for predicting rock burst intensity. According to the attribute reduction algorithm in rough set theory, the main influencing factors of rockburst under certain geological conditions are determined, the redundant data is deleted, and the parameters of support vector machine are optimized by particle swarm optimization. The main control factors of rock burst are mapped to high dimensional space by kernel function, and the nonlinear mapping relationship between the main control factors and the intensity of rock burst is fitted. A rock burst prediction model based on rough set theory and particle swarm support vector machine (RS-PSOSVM) is established. The model is applied to rock burst prediction of Dafangling tunnel. The results show that the model has high accuracy and stability. The prediction results of rockburst are consistent with the actual results, and the feasibility of the model is verified.
【作者单位】：中南大学资源与安全工程学院;武汉理工大学资源与环境工程学院;中南大学数字矿山研究中心;
【基金】：国家高技术研究发展计划(863计划)项目(2011AA060407) 中央高校基本科研业务费专项资金资助项目(2017IVA045)~~
【分类号】：TP18;TU45
【正文快照】： 岩爆是在地应力条件下深部工程开挖或开采过程中的一种地质灾害,是由于开挖卸荷作用致使围岩应力重新分布,岩体中聚积的弹性变形势能在一定条件下突然猛烈释放,导致岩体产生爆裂松脱、剥落、弹射甚至抛掷等脆性破坏的现象[1-4]。据不完全统计,1949—1997年,我国有33个煤矿发生

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