Results 11 to 20 of about 45 (36)
Advances in Civil Engineering, Volume 2021, Issue 1, 2021., 2021 In this research, a uniaxial acoustic emission experiment was conducted on rock samples with different positions and diameters of the hole, and an analysis was made on the impact of different hole positions and diameters on the mechanical properties, failure, energy conversion, and acoustic emission‐caused damage characteristics and laws of the rock ...
Fukun Xiao +3 more
wiley +1 more source
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 During the excavation of a large number of deeply buried tunnels and mining projects, rockburst disasters occur frequently due to the complex geologic environment in deep underground, including high initial geostress, adverse tectonic actions, and excavation disturbance.
Guangtan Cheng +4 more
wiley +1 more source
Energy Science &Engineering, Volume 8, Issue 1, Page 4-27, January 2020., 2020 The integrated effect of unloading rates, in situ stresses, and sectional shapes of deep tunnels were considered. The entire failure process, destruction severity, and failure range were investigated and analyzed. The released strain energy is shown to present distinct variation trend under different conditions.
Fan Feng +5 more
wiley +1 more source
Energy Science &Engineering, Volume 7, Issue 6, Page 2265-2286, December 2019., 2019 Simulation of hole failure with hard rock specimen induced by excavation unloading was conducted by FDEM. Tunnel shapes and lateral pressure coefficients were studied by means of failure process, displacement distribution, and released strain energy.
Fan Feng +5 more
wiley +1 more source
Study of Simulation Test in Inclusion Rockburst
Advances in Civil Engineering, Volume 2019, Issue 1, 2019., 2019 Based on the existing classification research of rockburst dynamic disasters, a new rockburst model is introduced. The model specimens with inclusion rock are designed and produced, and the indoor test of inclusion rockburst with or without cementation, different inclusion angles, and prefabricated cracks of different lengths is carried out.
Zhidong Wang +5 more
wiley +1 more source
Mechanism of Strain Burst by Laboratory and Numerical Analysis
Shock and Vibration, Volume 2018, Issue 1, 2018., 2018 Strain burst is often considered to be a type of failure related to brittle rock material; therefore, many studies on strain burst focus on the brittleness of rock. However, the laboratory experiments show that strain burst can not only occur in hard brittle rock‐like granite but also in the relatively ductile rock‐like argillaceous sandstone.
Manchao He +3 more
wiley +1 more source
Strain Rockbursts Simulated by Low‐Strength Brittle Equivalent Materials
Advances in Materials Science and Engineering, Volume 2016, Issue 1, 2016., 2016 This paper presents experimental study on rockbursts that occur in deep underground excavations. To begin with, the boundary conditions for excavation in deep underground engineering were analysed and elastic adaptive boundary is an effective way to minimize the boundary effect of geomechanical model test. Then, in order to simulate an elastic adaptive
Lang Li +6 more
wiley +1 more source
Energy Science &Engineering, Volume 13, Issue 8, Page 4252-4266, August 2025.ABSTRACT During the excavation of a deep‐buried tunnel by the drilling and blasting method, the dynamic stress of blasting may cause the disorderly release of high energy in the rock mass during the blasting process of deep high‐energy rock. Blasting vibration is one of the main factors inducing dynamic disasters (such as rockbursts) in the surrounding
Chao Ren +5 more
wiley +1 more source
A New Method to Assess the Possibility of Brittle Failure of Rock Induced by Deep Excavations
International Journal for Numerical and Analytical Methods in Geomechanics, Volume 49, Issue 6, Page 1725-1746, 25 April 2025.ABSTRACT Spalling and rockburst are severe criticalities that can emerge while excavating deep tunnels in rock masses under heavy natural stress states. Here, rock brittle failure can induce massive releases of the energy stored during the excavation and dangerous projections of rock blocks into the opening.
Lorenzo Milan +2 more
wiley +1 more source
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