摘要
在对破碎岩体稳定性分级过程中,传统RMR岩体分级方法中RQD和节理间距指标容易受到测量方位和测量角度的影响。针对这一不足,引入岩体分形理论,以岩体分形维数代替RMR分级方法中的RQD和节理间距两项指标,改进性的提出了一种适用于破碎岩体稳定性分级的FT分级方法。以岩体分形理论为基础,现场获取结构面信息并导入三维重构模型,借助CAD内置VAB程序,计算破碎岩体分形维数。根据各指标评分细则,制定FT分级方法评价标准。以某金矿6个试验区岩体结构面调查数据及岩体力学参数为基础,运用改进的FT法分别对试验区破碎岩体稳定性进行评价。结果表明:FT法提高了分级准确性,减少了现场工作量,提高了分级效率,同时在对岩体稳定性描述方面更加合理,将为地下矿山破碎岩体稳定性分级带来极大便利。
In the process of stability classification of broken rock mass,RQD and joint spacing index in traditional RMR rock mass classification method is easily affected by measurement orientation and angle.In order to solve this problem,the fractal theory of jointed rock mass is introduced,and the fractal dimension of jointed rock mass is used to replace RQD and joint spacing in RMR classification method.An improved FT classification method suitable for stability classification of jointed rock mass is proposed.Based on the fractal theory of rock mass,the structural plane information is obtained on site and imported into the three-dimensional reconstruction model.The fractal dimension of jointed rock mass is calculated with the help of CAD built-in VAB program.According to the scoring rules of each index,the evaluation standard of FT classification method was established.Based on the investigation data of rock mass discontinuities and rock mass mechanical parameters in 6 test areas of a gold mine,the stability of broken rock mass in the test area is evaluated by using the improved FT method.The results show that:FT method can improve the classification accuracy and the classification efficiency,reduce the field workload.At the same time,it is more reasonable in describing the stability of rock mass,which will bring great convenience for the stability classification of broken rock mass in underground mines.
作者
刘涛
邢其岭
Liu Tao;Xing Qiling(Shandong Gold Mining(Linglong)Co.,Ltd.,Shandong,265433)
出处
《当代化工研究》
CAS
2024年第7期156-159,共4页
Modern Chemical Research
关键词
分形理论
破碎岩体
稳定性分级
FT分级法
fractal theory
broken rock mass
stability classification
FT grading method
作者简介
刘涛(1985-),男,汉族,山东泰安人,本科,中级工程师,研究方向:金属矿开采。
