TITLE:
Theoretical Analysis of Simulating the Locked-In Stress in Rock Pore by Thermal Expansion of Hard Rubber
AUTHORS:
Lu Dong, Hansheng Geng, Hongfa Xu, Yinhao Yang
KEYWORDS:
Rock Pore, Locked-In Stress, Similar Simulation, Rubber Particles, Ther-mal Expansion
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.10 No.2,
March
30,
2020
ABSTRACT: Rocks are composed of mineral particles and micropores
between mineral which has a great influence on the mechanical properties of
rocks. In this paper, based on the theory of locked-in stress developed by
academician Chen Zongji, the locked-in stress problem in underground rock is
simulated by the thermal expansion of hard rubber particles. The pore inclusion
in rock is assumed to be uniformly distributed spherical cavities. Using the
thermal stress theory, the stress of rock with a spherical pore inclusion is
equivalent to the thermal stress generated by the spherical hard rubber inclusion.
The elastic theory formula of the temperature increment and the equivalent pore
pressure of the spherical hard rubber inclusion is derived. The numerical
simulation of the rock mass model with a spherical hard rubber inclusion is
carried out and compared to the theoretical calculation results; the results show that they are consistent. The method proposed by this
paper for simulating stress distribution in rock by thermal stress is reasonable
and feasible; it has a positive meaning for further study of mechanic phenomenon of
rock with micropore inclusion.