Justification of rheological test measurement parameters in incremental loading mode for rock salt

Authors: Ageenko V.A.

Stability of underground gas storages depends on proper design choices. Justification of the design choices requires reliable data on physical and mechanical properties of salt rock mass enclosing underground gas storages. Rock salt possesses pronounced rheological properties. In this connection, determination of rheological properties should be assumed as one of the top-priority tasks of geocontrol in construction and operation of underground gas storages. Very many experimental studies into rock creepage are known to date, including triaxial loading. Various mathematical models are available to predict behavior of materials under longterm deformation. Regulatory documents set the estimated period of operation for mining or construction facilities as 50 years, while the most creep tests last for not longer than 500 hours. The aim of this study is to reveal the behavioral patterns of rock salt in rheological tests of direct and incremental uniaxial and triaxial loading, with varying values and durations of load increments in rock salt samples of similar structure. The calculated rheological characteristics in the direct and incremental loading methods can be used to define the optimal approaches to estimation of rheological properties of salt rocks under uniaxial and triaxial loading. The experimental results made it possible to find the required incremental loading test parameters such that the rheological characteristics agree with the data of the direct loading tests.

Keywords: rock salt test, incremental loading mode, experimentation duration, strains, stresses, rheological characteristics, creeping process prediction.
For citation:

Ageenko V.A. Justification of rheological test measurement parameters in incremental loading mode for rock salt. MIAB. Mining Inf. Anal. Bull. 2021;(4):113-123. [In Russ]. DOI: 10.25018/0236_1493_2021_4_0_113.

Issue number: 4
Year: 2021
Page number: 113-123
ISBN: 0236-1493
UDK: 622.03
DOI: 10.25018/0236_1493_2021_4_0_113
Article receipt date: 17.04.2020
Date of review receipt: 12.12.2020
Date of the editorial board′s decision on the article′s publishing: 10.03.2021
About authors:

V.A. Ageenko, Graduate Student, e-mail: Valera.ageenko@mail.ru, National University of Science and Technology «MISiS», 119049, Moscow, Russia.


For contacts:

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