矿业科学学报2024，Vol.9Issue(3)：426-434,9.DOI:10.19606/j.cnki.jmst.2024.03.011
基于超声横波测试的Na基膨润土充填体强度预测模型研究
Research on the strength prediction model of Na based bentonite filling body based on ultrasonic transverse wave testing
摘要
Abstract
As the core unit of backfill mining method,the strength of backfill is an important indicator to ensure safe mining.Na-based bentonite features a high methylene blue adsorption capacity and green compressive strength,making it a high-quality additive for preparing filling materials.However,there are few studies probing into the relationship between the dosage and the strength of the filling materials.This paper analyzes the changes in shear wave velocity,dominant frequency amplitude,ampli-tude attenuation coefficient,and waveform fractal dimension of filling materials with different Na-based bentonite dosages at different ages through ultrasonic testing technology and uniaxial compression tests.Combined with sensitivity analysis,we selected the most sensitive acoustic parameters to changes in compressive strength.Furthermore,this study establishes a strength prediction model for backfill with different Na-bentonite contents and combining significance testing and comparative analysis.The research findings can serve as a valuable reference for theoretical research and engineering applications related to predicting the uniaxial compressive strength of backfill materials.关键词
充填体/Na基膨润土/超声波测试/单轴抗压强度/幅值衰减系数/预测模型Key words
filling body/Na based bentonite/ultrasonic testing/uniaxial compressive strength/amplitude attenuation coefficient/prediction model分类
矿业与冶金引用本文复制引用
林强,管华栋,王观石,程锦山..基于超声横波测试的Na基膨润土充填体强度预测模型研究[J].矿业科学学报,2024,9(3):426-434,9.基金项目
江西省教育厅科学技术研究项目(GJJ190499) （GJJ190499）
江西理工大学人才培养项目(205200100112) （205200100112）
