摘要
基于深部非连续自应力等级块系岩体构造理论,研究在冲击扰动下块系岩体中岩块加速度的频域响应反演岩块间黏弹性性质。将块系岩体划分成3个区域,即初始区域,中间区域和末端区域,分别研究各区域中间块体加速度的频域特性,通过不同区域内块体加速度频域响应的综合特性反演岩块间的5种黏弹性性质变化。通过研究发现:各区域中间块体的频带范围依次减小对应着块体间黏性同时增大;各区域中间块体频带范围几乎没有变化对应着块体间黏性周期性变化;各区域中间块体高频谐波部分向低频平移对应着各块体间弹性同时减小;仅末端区域中间块体的高频谐波部分向低频平移对应着各块体间弹性周期性变化;各区域中间块体的频域曲线简单光滑,且近似对称单调变化对应着块体间弹性阶梯性增大。同时,给出块体间具有5种黏弹性性质时各区域中间块体加速度频域响应的中心频率及中心频带宽度数值特征。
Based on the discontinuous and self-stress rock mass theory of deep rock mass as of a complex hierarchy of block structure,the frequency response of block-rock acceleration inversion viscoelastic property of block-rock partings on shock load was studied.The block-rock mass structure was divided into three regions,namely initial region,middle region and the end region.Frequency characteristics of block-rock acceleration in each region intermediate were studied.Five kinds viscoelastic property of the block-rock mass partings were inversed,through frequency characteristics of all the three regions intermediate block-rock.According to the results,the range of frequency band decrease in turns from the initial to the end regions when partings viscous increased simultaneous;the range of frequency band hardly any change when partings viscous periodic variation;harmonic of high frequency translation to low frequency of all the three regions when partings elasticity decresed simultaneous;harmonic of high frequency translation to low frequency only in the end region when partings elasticity periodic variation;frequency curves are smoothly meanwhile symmetry and monotony variation in each region,when partings elasticity increased gradually.The numerical feature of acceleration frequency domain response in each region is given including frequency band center and bandwidth with five kinds viscoelastic properties in partings.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第A01期19-24,共6页
Journal of China Coal Society
基金
国家重点基础研究发展规划(973)资助项目(2010CB226803)
辽宁省自然科学基金资助项目(201204414)
辽宁省教育厅基金资助项目(L2012107)
关键词
块系岩体
摆型波
频域特性
黏弹性性质
反演方法
block-rock mass
pendulum-type wave
characteristics of frequency domain
viscoelastic property
inversion method
