CAJ | 학술논문

具有复杂成生关系的危岩块聚集体是孕发大型及特大型崩塌灾害的基本条件，聚集体内任何一个危岩块的突发性破坏均会释放能量，并向周围传播，产生激振效应，可用激振加速度表征危岩破坏激振信号。针对坠落式危岩，通过室内模型试验，分析了实验条件下危岩破坏激振信号的概率统计特征。分析结果表明，危岩破坏所释放的能量具有点荷载特征，激振信号具有一定的自相关性；激振信号的概率密度呈现单峰型近似正态分布，概率密度水平方向的峰值强度大于竖直方向的峰值强度；危岩破坏瞬间，距离激振源越近，激振信号的均值、有效值和标准差数值越大，且竖直方向的量值大于水平方向的量值；危岩块之间界面的完整性影响着激振信号的传递效果，完整性越好，激振信号的统计特征值及概率密度峰值越大，激振信号衰减用时越长。研究成果对于实施考虑相似条件下危岩破坏激振效应实验研究有积极意义。
구유복잡성생관계적위암괴취집체시잉발대형급특대형붕탑재해적기본조건，취집체내임하일개위암괴적돌발성파배균회석방능량，병향주위전파，산생격진효응，가용격진가속도표정위암파배격진신호。침대추락식위암，통과실내모형시험，분석료실험조건하위암파배격진신호적개솔통계특정。분석결과표명，위암파배소석방적능량구유점하재특정，격진신호구유일정적자상관성；격진신호적개솔밀도정현단봉형근사정태분포，개솔밀도수평방향적봉치강도대우수직방향적봉치강도；위암파배순간，거리격진원월근，격진신호적균치、유효치화표준차수치월대，차수직방향적량치대우수평방향적량치；위암괴지간계면적완정성영향착격진신호적전체효과，완정성월호，격진신호적통계특정치급개솔밀도봉치월대，격진신호쇠감용시월장。연구성과대우실시고필상사조건하위암파배격진효응실험연구유적겁의의。
The perilous rock aggregates with complex genetic relations are the basic conditions to trigger large and giant collapse disasters,the sudden destruction of any rock block in the aggregates releases energy to spread to the surrounding and produce an excitation effect.The excitation signal is reasonable to be characterized by an excitation acceleration.For the falling perilous rock,its probabilistic and statistical features were analyzed through an indoor model test.The results showed that the energy released during rupture of perilous rock has point load characteristics and a certain autocorrelation;the probability density of the excitation signal reveals a single peak type and a quasi-normal distribution, the peak intensity in the horizontal direction is greater than that in the vertical direction;at the moment for perilous rock to rupture,the closer the distance from the excitation source,the greater the average value,the valid value and the standard deviation of the excitation signal,especially,the measuring value in the vertical direction is greater than that in the horizontal direction;the completeness of the interface between perilous rock blocks significantly affect excitation signal transmission effect,the better the completeness,the greater the peaks of the statistical characteristics and the probability density of the excitation signal,and the longer the time of the excitation signal decay.The study was meaningful to the model test of excitation effect during rupture of perilous rock under similar conditions.