Slip instability and tensor instability are two kinds of failure modes of cemented waste rock backfills. In order to simulate the creep characteristics of cemented waste rock backfills, PFC was carried out. The results show that: rocks inside the models will have displacement under load. The expansion is caused by large lateral displacement of the rocks. A non-stationary creep model of cemented...

The article presents the results of a numerical simulation deformation-stress state in rock mass around salt cavern which is part CAES installation (Compressed Air Energy Storage). model based on parameters Huntorf power plant installation. influence temperature and salt-creep speed stability storage was determined basis three different stress criteria effort points at time intervals. analysis ...

The salt behavior subjected to creep-fatigue load is meaningful ensure the stability of cavities used for underground energy storage. specimens are tested under three paths load, including creep followed by fatigue (C + F), (F C) and (CF). stress-strain curves, deformation, loading modulus acoustic emission (AE) count were systematically analyzed. axial, lateral volumetric deformations present ...

The directional wells can effectively improve the development efficiency of deep and ultra-deep pre-salt oil gas reservoirs in Kuqa Mountains Tarim basin. Under condition temperature pressure, mechanical properties composite salt-gypsum layers are complex. During drilling process, that salt rock is easy to creep causes drill stick. controlling well inclination, it difficult choose appropriate f...

A steady-state creep law for rocksalt, describing the two parallel mechanisms of dislocation creep and fluid-enhanced grain-boundary diffusion creep, has been used in numerical models of salt diapirism, to study the effective viscosity of rocksalt. Typical models included a 3-km-thick sedimentary layer on top of 1 km of rocksalt. The grain size of the salt has been varied between 0.5 and 3 cm a...

ABSTRACT: The authors have proposed and discussed temporary storage of heated water in openings excavated in rock mountain from the viewpoints of multiple-utilization of land, environmental safeguards, energy conservation, etc. When used for heated-water storage, the rock mass around the openings will receive the effects of the heated water. In this study, a uniaxial compression creep test at h...

We studied the elastic moduli, ductile creep behavior, and brittle strength of shale-gas reservoir rocks from Barnett, Haynesville, Eagle Ford, and Fort St. John shale in a series of triaxial laboratory experiments. We found a strong correlation between the shale compositions, in particular, the volume of clay plus kerogen and intact rock strength, frictional strength, and viscoplastic creep. V...

Original scientific paper Time-dependent deformations in soft rocks represent an important part of total deformations which occur after excavation of the tunnel opening. In the light of this, comprehensive laboratory uniaxial creep tests were performed on marl rock monolits. The testing used marl as a chosen representative rock samples of the group of soft rocks which exhibits creep behaviour. ...