Research on Characteristics of Brittleness to Ductility Transition of Stratification in Continental Shale

LI Junrun; YIN Binrui; LIU Junxin; ZHANG Ke; TANG Wei; ZHU Baolong

doi:10.13204/j.gyjzG21011102

Volume 52 Issue 8

Aug. 2022

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LI Junrun, YIN Binrui, LIU Junxin, ZHANG Ke, TANG Wei, ZHU Baolong. Research on Characteristics of Brittleness to Ductility Transition of Stratification in Continental Shale[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(8): 168-174. doi: 10.13204/j.gyjzG21011102

Citation:

LI Junrun, YIN Binrui, LIU Junxin, ZHANG Ke, TANG Wei, ZHU Baolong. Research on Characteristics of Brittleness to Ductility Transition of Stratification in Continental Shale[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(8): 168-174. doi: 10.13204/j.gyjzG21011102

Citation:

LI Junrun, YIN Binrui, LIU Junxin, ZHANG Ke, TANG Wei, ZHU Baolong. Research on Characteristics of Brittleness to Ductility Transition of Stratification in Continental Shale[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(8): 168-174. doi: 10.13204/j.gyjzG21011102

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Research on Characteristics of Brittleness to Ductility Transition of Stratification in Continental Shale

doi: 10.13204/j.gyjzG21011102

School of Civil Engineering and Architecture, Southwest University of Science and Technology; Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China

Received Date: 2021-01-11
Available Online: 2022-12-01

Abstract

Abstract

In view of the problem that the relation between pressure of brittleness to ductility transition on deep shale gas caprock and dip angles of stratification were indefinite, uniaxial and triaxial compression tests of rock were conducted from the perspective of physical and mechanical properties of rock. Based on Hoek-Brown Failure Criterion, stratification damage was introduced to predict the critical pressure of brittleness to ductility transition. The results showed that: to increase confining pressure could restrained the effect of stratification on mechanical properties of rock; with the increase of confining pressure, the failure mode of shale gradually tended to shear failure with a single fracture;stratification surfaces played a certain role in controlling the pressure of brittleness to ductility transition, and the pressure of brittleness to ductility transition in parallel and vertical stratification directions was significantly higher than that of rock at other dip angle directions with stratification.
- shale,
- stratification,
- volume strain,
- failure mode,
- Hoek-Brown Failure Criterion,
- stratification damage,
- brittleness to ductility transition

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References(17)

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