Pendulum-type waves. Part I: State of the problem and measuring instrument and computer complexes

Kurlenya, M. V.; Oparin, V. N.; Vostrikov, V. I.

doi:10.1007/bf02046583

Cited by 26 publications

(9 citation statements)

References 2 publications

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“…Relation (12) implies that, for the Φ 5,1 w 1 frequency response, the frequency band center ω = 212.07 and the bandwidth σ ω = 9.68 for ω = 198 ; the band center ω = 290.63 and the bandwidth σ ω = 15.23 , for ω = 178 , and the band center ω = 134.88 and the bandwidth σ ω = 16.22 for ω = 218 . The band center of the frequency response is higher for ω = 178 than for ω = 198 but, for ω = 218 , the band center is lower as compared with ω = 198 .…”

Section: Examplementioning

confidence: 99%

“…M. A. Sadovskii [16] offered a new viewpoint, which makes the dynamic study of the rock mass based the discontinuous and self-stress block rock mass structure. Today the researches show that the pendulum-type propagation of waves in the discontinuous and selfstressed block rock mass structure is closely connected with the rock mass dynamic response in deep [10,[12][13][14]. In the last years, the theoretical and experimental investigations of pendulum-type waves achieved some progress [1-6, 8, 15, 17].…”

Section: Introductionmentioning

confidence: 99%

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Steady-State Response of the Block Rock Mass to External Periodic Excitation and Resonance Condition

2014

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The theory of deep rock mass is proposed as the complex hierarchy of block structures on the basis of the discontinuous and self-stressed rock mass structure in depth. We study the block structure of the rock mass steady-state response to the external periodic excitation. We get the resonance equation and the resonance condition for the block rock mass structure under external periodic excitations. The effects of the local mass and stress state between the adjacent rock blocks in block rock mass structure on the steady-state displacement of rock blocks are analyzed.

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Section: Examplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Steady-State Response of the Block Rock Mass to External Periodic Excitation and Resonance Condition

2014

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“…As is known, rock at great depth is characterized by the existence of rich joints so that prominent blocky characteristics are found [26][27][28][29], leading to the occurrence of some new phenomena, such as the pendulum-type reversal wave [34][35][36] al. suggested that for seriously and moderately jointed rock masses, the supporting measurements should be different [11].…”

Section: A Unified Mechanism Of Slabbing and Zonal Disintegrationmentioning

confidence: 99%

A continuum grain-interface-matrix model for slabbing and zonal disintegration of the circular tunnel surrounding rock

Wang

Pan

2013

J Min Sci

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It is difficult to numerically reproduce the common failure modes of the circular tunnel surrounding rocks, such as the slabbing or delamination in hard rock, and the zonal disintegration at great depth, based on continuum and homogeneous elastoplastic models. In the present paper, a grain-interfacematrix model is proposed based on continuum elastoplastic theories, and implemented in FLAC. Rock is simplified as a compound of the circular grains, rectangular interfaces, and remaining matrix. These components are modeled by squared elements with the same size. Results show that shear strains exhibit intersecting and multiple shear bands or slip lines extending intergranularly. High principal stresses in compression are found to form rings around the tunnel surface. For fine grains, the intensive rings are found, similar to the slabbing; while for coarse grains, the spacing between rings becomes large, analogous to the zonal disintegration. Thus, a unified mechanism of two kinds of phenomena is explained as the selforganization process of dominant microstructures subjected to forces. Nevertheless, the scale of dominant microstructures regarding or governing the process is different. For hard rock without joints, the scale corresponds to actual grains; while for jointed rock mass under high compressive stresses at great depth, the scale of rock blocks is dominant.

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“…In geomedia specific deformation processes called "slow motions" are sometimes observed [17][18][19][20][21]. There are few experimental confirmations of such waves, and the data on their velocities differ appreciably.…”

mentioning

confidence: 99%

Localization of deformation and prognostibility of rock failure

et al. 2014

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The general regular patterns in localization of deformation at pre-failure stage in rocks under compression are found and analyzed (sylvinite, marble sandstone). Applicability of speckle-photography methods to problems on rock deformation and failure is proved. The authors define the self-sustained behavior of the localized plastic deformation in rocks under compression, due to effect of various plastic micromechanisms. The autowaves in rock specimens under compression propagate at a rate of ~ 10 -5 -10 -4 m/s (0.3-3 km/yr), which is close to slow motions induced in the earth crust by an earthquake or a rockburst. The ratio of the experimental and calculated failure times is correlated with the coordinates of the failure points in the test rock specimens.

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Pendulum-type waves. Part I: State of the problem and measuring instrument and computer complexes

Cited by 26 publications

References 2 publications

Steady-State Response of the Block Rock Mass to External Periodic Excitation and Resonance Condition

Steady-State Response of the Block Rock Mass to External Periodic Excitation and Resonance Condition

A continuum grain-interface-matrix model for slabbing and zonal disintegration of the circular tunnel surrounding rock

Localization of deformation and prognostibility of rock failure

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