超深竖井围岩体爆破模拟材料选择试验研究  

Experimental Study on Material Selection for Blasting Simulation of Rock Mass Surrounding Ultra-deep Shaft

作　　者：杨小林 徐杰 褚怀保[1] 孙博[1] 王东辉 张光然 陈璐阳 郭鹏 王少华 YANG Xiao-lin;XU Jie;CHU Huai-bao;SUN Bo;WANG Dong-hui;ZHANG Guang-ran;CHEN Lu-yang;GUO Peng;WANG Shao-hua(College of Civil Engineering,Henan Polytechnic University,Jiaozuo 451003,China)

机构地区：[1]河南理工大学土木工程学院,焦作451003

出　　处：《爆破》2024年第4期1-7,共7页Blasting

基　　金：国家自然科学基金重点项目(No.52130403)深部金属矿连续智能化安全开采基础研究。

摘　　要：研发超深竖井围岩的爆破相似模拟材料并开展物理模型试验,是研究爆破作用下超深竖井围岩的动力响应规律的基础。论文以三山岛金矿西岭副井下二长花岗岩为模拟对象配制花岗岩相似材料,选取铁矿粉、重晶石粉为细骨料,石英砂为粗骨料,松香酒精溶液为黏结材料,石膏为调节材料,采用正交设计法配比模拟材料,测定了不同配比相似材料的力学参数,并进行了各影响因素的敏感性分析和模拟材料的试爆试验。结果表明:基于试件密度、单轴抗压强度和弹性模量,选定的配比方案能够满足室内爆破模型试验的要求;细骨料占总骨料比对模拟材料的密度有较显著影响;粘结剂浓度对模拟材料的抗压强度、抗拉强度、弹性模量和粘聚力均有较显著影响;石膏占比对模拟材料的内摩擦角有较显著影响;高围压作用下模型试块内的应变峰值数值整体较大,并且随着距离的增加,应变峰值的衰减速度逐渐降低。Researching blasting similar simulation materials for ultra-deep shaft surrounding rock and conducting physical model tests are the basis for studying the dynamic response law of ultra-deep shaft surrounding rock under blasting.This paper used the monzonitic granite in Xiling subsidiary shaft of Sanshandao gold mine as the simulation object to prepare similar granite materials.The iron ore powder and barite powder were selected as fine aggregates,the quartz sand was selected as coarse aggregate,the rosin alcohol solution was selected as binding material,and the gypsum was selected as adjusting material.The orthogonal design method was used to prepare the simulation materials.The mechanical parameters of similar materials with different proportions were determined,and the sensitivity analysis of each influencing factor and the blasting test of the simulated materials were carried out.The results show that the selected proportion can meet the requirements of indoor blasting model tests based on the specimen's density,unaxial compressive strength and elastic modulus.The proportion of fine aggregate in the total aggregate significantly affects the density of the simulated materials.The binder concentration significantly affects the compressive strength,tensile strength,elastic modulus and cohesion of the simulated materials.The proportion of gypsum significantly affects the internal friction angle of the simulated materials.The peak strain value in the model test block under high confining pressure is more significant as a whole,and the attenuation rate of the peak strain gradually decreases with the distance increase.

关 键 词：超深竖井 爆破 相似材料 正交设计 力学性能 敏感性分析 

分 类 号：TD836[矿业工程—煤矿开采]