摘要
为了实现钻爆法开挖过程中对掌子面前方围岩岩性的准确、快速评价,研究了矿山法施工凿岩台车钻孔开挖过程中钻进参数与隧道围岩单轴抗压强度之间的关系。初步建立基于最小二乘支持向量机的凿岩台车地质预报模型,并优化模型参数提高模型精度,搭建了凿岩台车地质预报系统。通过岩石物理力学性能试验和厂内凿岩台车钻进试验,得到厂内试验钻进参数与隧道围岩参数数据库。厂内试验验证结果显示,模型预报围岩单轴抗压强度与试验实测参数相近,拟合优度R2=88.1%,平均绝对误差、均方根误差分别为MAE=2.39、MSE=4.21,表明凿岩台车地质预报系统对单轴抗压强度具备较好的预报效果,为后期提高钻爆法施工凿岩台车智能化控制程度及指导隧道安全施工提供基础。
In order to accurately and quickly evaluate the character of surrounding rock in front of the tunnel face during drilling and blasting excavation by the drilling jumbo,the relationship between drilling parameters and uniaxial compressive strength of surrounding rock is studied.The geological prediction model of drilling jumbo based on least square support vector machine is preliminarily established,the model parameters are optimized to improve the accuracy of the model,and the geological prediction system of rock drilling jumbo is built.The database of drilling parameters and tunnel surrounding rock parameters of factory drilling test is obtained through rock physical and mechanical property test and rock jumbo factory drilling test.The factory test verification results show that the uniaxial compressive strength of surrounding rock predicted by the model is close to the measured parameters,the goodness of fit R2=88.1%,and the mean absolute error and root mean square error MAE=2.39 and MSE=4.21,indicating that the drilling jumbo geological prediction system has good prediction effect for the uniaxial compressive strength,and can provide a basis for and improve the intelligent control degree and guide the safe construction of tunnel of rock drilling jumbo in drilling and blasting construction.
作者
田雪豪
康家安
江帅
于鹏
付开勇
TIAN Xuehao;KANG Jia′an;JIANG Shuai;YU Peng;FU Kaiyong(China Railway Engineering Equipment Group Co.,Ltd.,Zhengzhou 450016,Henan,China)
出处
《隧道建设（中英文）》
CSCD
北大核心
2022年第S01期267-273,共7页
Tunnel Construction
关键词
地质预报
凿岩台车
最小二乘支持向量机
围岩单轴抗压强度
geological prediction
drilling jumbo
least squares support vector machine
uniaxial compressive strength of surrounding rock
作者简介
第一作者:田雪豪(1992—),女,河南周口人,2018年毕业于郑州大学,机械电子工程专业,硕士,工程师,现从事隧道施工装备研发设计工作。E-mail:txh_zzu@163.com。
