Tianhui Ma
Dalian University of Technology
Ultimate tensile strengthArchGeologyEngineeringFinite element methodSaturation (chemistry)Deformation (engineering)Composite materialSeismologyMining engineeringWeibull distributionAcoustic emissionGeotechnical engineeringMaterials sciencePerpendicularOverburden pressureResidual strengthArch damRoofPerforation (oil well)Fracture zoneHydraulic fracturingStress concentrationEnergy indexShale gasRock failureExcavationHydropowerRock mass classificationFracture (geology)Elastic modulusNumerical analysisComputer simulationDisplacement (vector)MechanicsFracture mechanicsFailure mode and effects analysisStructural engineeringMicroseismInduced seismicityStress (mechanics)Shear (geology)Process (computing)
36Publications
12H-index
478Citations
Publications 29
Newest
#1Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
Last. W.R. Li (DUT: Dalian University of Technology)
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Abstract null null Fracture spacing as a widespread phenomenon in nature shows similar patterns on various geometric surfaces. To explore the similarities and differences between various geometric surfaces in the process of fracture spacing formation, numerical simulations are conducted on bi-layered three-dimensional models of three various geometric surfaces, including slab surface, cylindrical surface, and spherical surface by the finite element method (FEM). The fractures develop under a qua...
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#1Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
#2Zhiqiang Feng (DUT: Dalian University of Technology)
Last. Kedar Prasad Yadav (DUT: Dalian University of Technology)
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The RFPA3D is used to establish a fine finite element model of 6.63 million elements, which realizes the fine simulation of the stability of the Xiluodu arch dam under layered, overall, multiworking conditions and multistress fields, and the cracking and failure process under overload. The structural design scheme of the arch dam and the corresponding foundation treatment design are evaluated. The model fully reflects the measures of dam shape structure design, angle fitting structure design, an...
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#1Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
Last. Ke Ma (DUT: Dalian University of Technology)H-Index: 9
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Microseismic monitoring technology can start from the most initial stage of rock deformation and track and monitor the progressive failure process of rock mass from the fracture of rock blocks to the instability of rock mass. Thus, the scientific nature of monitoring work is greatly promoted, and the accuracy and advance of the prediction of engineering and geological disasters are improved. In this paper, the fracture and instability of rock can be analyzed by analyzing the microseismic signals...
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#1Dongsong Li (Penn State College of Communications)
#2Yan-hong Du (Liaoning Technical University)H-Index: 1
Last. Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
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In this paper, numerical test research is carried out on the loading rate effect of a numerical specimen (sample C) with a transfixion sawtooth structural plane by using the rock failure process analysis (RFPA) 2D software. In order to study the mechanical characteristics difference between the rock mass with this kind of structural plane and other rock masses, the intact numerical specimen (sample A) of no structural plane and the numerical specimen (sample B) with smooth structural plane are a...
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#1Shichao Zhang (NU: Northeastern University)H-Index: 1
#2Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
Last. Yucheng Wang (NU: Northeastern University)H-Index: 1
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Delayed rockburst occurs after the stress adjustment of surrounding rocks with discontinuous microseismicity, which is difficult to predict accurately. To predict and prevent the occurrence of the delayed rockbursts, study on time behavior of the surrounding rock failure and the mechanism behind the delayed rockbursts is necessary. In this article, based on the rockburst data from Jinping II Hydropower Station headrace tunnels, China, the characteristics of the delayed rockbursts are summarized....
5 CitationsSource
#1Fei Liu (DUT: Dalian University of Technology)H-Index: 3
#2Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
Last. Feng Chen (DUT: Dalian University of Technology)H-Index: 2
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Abstract Collapse is one of the most frequent and catastrophic hazards in tunnel engineering, which poses serious threats to the safety of personnel and great influence on the excavation schedule. This study presents the geotechnical study carried out after two violent collapses at the Yangshan tunnel of the Coal Transportation Channel from the Western Inner Mongolia to the Central China on July 2, 2017 and July 24, 2017, respectively. The in-situ stresses were first measured by a hydraulic frac...
6 CitationsSource
#1Fei Liu (DUT: Dalian University of Technology)H-Index: 3
#2Chunan Tang (DUT: Dalian University of Technology)H-Index: 20
Last. L. X. Tang (USTL: University of Science and Technology, Liaoning)H-Index: 4
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Rockbursts pose serious threats to the safety of personnel and equipment in tunnels of the Hanjiang-to-Weihe River Diversion Project. Small-scale structural planes around the tunnel play an important role in controlling the occurrence and intensity of rockbursts. To study the characteristics and evolution of rockbursts along a structural plane, three successive, intense rockbursts in the #4 sub-tunnel were summarized in detail and investigated by analyzing 492 recorded microseismic events. The r...
18 CitationsSource
#1Feng Chen (CUMT: China University of Mining and Technology)H-Index: 2
#2Chunan Tang (DUT: Dalian University of Technology)H-Index: 20
Last. Yan-hong Du (Liaoning Technical University)H-Index: 1
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To study the tensile mechanical properties of constant resistance bolts, the RFPA (Rock Failure Process Analysis) statics software is used to perform a uniaxial tensile test on a constant resistance bolt. The numerical test results show that the plastic strain value is 12 times the magnitude of the elastic strain. During plastic deformation, the fluctuation in the stress magnitude is relatively stable, indicating that the bolt has good constant resistance characteristics. The numerical test resu...
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#1Chaoyun Yu (DUT: Dalian University of Technology)H-Index: 2
#2Shibin Tang (DUT: Dalian University of Technology)H-Index: 12
Last. Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
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Abstract Water is an important factor influencing the long-term stability of underground construction. In the present work, a series of uniaxial compressive strength tests and multistage creep tests were performed on red sandstone specimens under different water soaking conditions. The results show that the peak strength and elastic modulus of the red sandstone decrease with not only water content but also immersion time, which can be better expressed by a negative exponential function. Multista...
25 CitationsSource
#1Fei Liu (DUT: Dalian University of Technology)H-Index: 3
#2Tianhui Ma (DUT: Dalian University of Technology)H-Index: 12
Last. Feng Chen (DUT: Dalian University of Technology)H-Index: 2
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Abstract Rockburst hazards are frequently encountered in tunnels at the Jinping II hydropower station, which pose serious threats to the safety of personnel and equipment. Abnormal stress concentration caused by the rock mass interfaces and geological defects along the #3 headrace tunnel makes the rockburst difficult to predict using routine estimate and monitoring methods. A two-body interaction model was used to interpret the mechanism of the rockburst, which divided the evolution of a rockbur...
14 CitationsSource