2018
DOI: 10.1590/1679-78254424
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Abstract: To investigate the deformation characteristic of deep rock under cyclic blasting, the static-dynamic loading experimental equipment was set up. The dynamic strain gauges and high-speed HS camera were adopted to obtain strain field and the crack propagation of rock under confining pressure of 0 MPa, 5 MPa and 10 MPa. Under the one-time loading from cylindrical charge, the cracks in crushed zone were generated by shear and tensile failure. Circumference compressive stress is formed around borehole by confining p… Show more

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Cited by 6 publications
(1 citation statement)
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“…Scholars in the field of rock mechanics and geothermal new energy have also carried out preliminary studies on mechanical characteristics of rocks surrounding a high-depth wellbore 5 7 , e.g., damage failure mechanism and criteria of deep rocks under conditions of coupled static and dynamic load, high temperature, dry–wet cycle. By analyzing the mechanical characteristics of deep rocks under coupled static and dynamic load, it was found that the dynamic tensile strength of rocks first increased and then decreased with increasing the axial static load, and the failure mode is mainly frictional damage of tension and shear mixture 8 10 .…”
Section: Introductionmentioning
confidence: 99%
“…Scholars in the field of rock mechanics and geothermal new energy have also carried out preliminary studies on mechanical characteristics of rocks surrounding a high-depth wellbore 5 7 , e.g., damage failure mechanism and criteria of deep rocks under conditions of coupled static and dynamic load, high temperature, dry–wet cycle. By analyzing the mechanical characteristics of deep rocks under coupled static and dynamic load, it was found that the dynamic tensile strength of rocks first increased and then decreased with increasing the axial static load, and the failure mode is mainly frictional damage of tension and shear mixture 8 10 .…”
Section: Introductionmentioning
confidence: 99%