频繁爆破作用下岩体累积损伤演化规律及振动效应研究

项目名称： 频繁爆破作用下岩体累积损伤演化规律及振动效应研究

项目编号： No.51464015

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 付玉华

作者单位： 江西理工大学

项目金额： 45万元

中文摘要： 岩体破碎和围岩保护是岩石工程对立统一的两个方面。高效破岩和控制爆破损伤及振动危害，是岩石工程领域关注的热点，特别是频繁爆破载荷作用下岩体累积损伤演化规律和振动效应，是当前亟待解决的基础问题。本课题基于现场原位测试，以弹性模量随爆破变化表征岩体损伤演化，采用理论分析、数值模拟和实验研究频繁爆破载荷作用下岩体累积损伤演化规律及振动效应。根据理论和实验研究，分析岩体弹性模量随药量、比例距离、比例高度和爆破次数之间的关系，建立岩体累积损伤演化方程和新的爆破损伤模型；采用新建爆破损伤模型，通过数值模拟并结合实验对所建模型进行验证；在萨道夫斯基公式基础上，考虑岩体损伤对爆破振动的衰减作用，建立损伤岩体质点峰值振动速度预测公式，据此建立损伤岩体爆破振动安全评价标准。研究结果对矿山开采，水利水电和公路铁路建设等岩石工程的理论研究、优化设计，安全生产、稳定性评价、围岩支护以用运营维护具有重要意义。

中文关键词： 爆破载荷；累积损伤演化；振动效应；弹性模量

英文摘要： Framentation of rock mass and the protection of surrounding rock is a unity of opposites in rock engineering.To seek a method which can break target rock mass efficiently as well as control the extent of blasting damage and the vibration effect of the explosion has become a hot topic in the field of rock engineering.The most pressing issue is to find evolution laws of cumulative damage of rock mass and its vibration effect under the circumstance of frequent blasting load.On the basis of inspection at original space and supposition of damage evolution token, this porject focuses on this issue through theoretical analysis,numerical stimulation and experiments.Based on theory and tests,the relationship between the elastic modulus of rock mass and the explosive quantity,the scale distance and height,blasting times has been analyzed,Then evolution equation of cumulative damage of rock mass and a new model of blast-induced damage have been established.By means of mumerical stimulation and experiments,the new model has been established.Sadov's formula and the attenuation effect of rock damage to blast vibration being considered,a new predictor formula for peak particle vibration velocity of fractured rock mass has been set up,upon which security evaluation criteria have been created.The research results are of great significance in theoretical analysis,optimal design,safe production ,estimation of stability,supporting and maintenance of surrounding rocks in the field of rock engineering,such as mining,water conservancy and hydropower projects,road and railway construction.

英文关键词： blasting load;cumulative damage evaluation;vibration effect;modulus of elasticity