May 3, 2011 · Rock deformation and subsidence in underground coal gasification (UCG) play a critical role in both formation of syngas and environmental performance. We discuss in this chapter methods used to describe and quantify rock deformation, techniques to measure rock deformation, and predict approaches and results of rock deformation research in UCG.

Oct 1, 2021 · Cyclic loads are frequently encountered in diverse geological processes and rock engineering applications, involving the geological tectonic movements, seismic actions, blasting excavations, and underground chamber supports. Since rocks are highly susceptible to cyclic loads, it is thus significant to characterize the deformation and failure mechanism and constitutive model of rocks suffering ...

Mar 1, 2017 · Evaluation of rock mass deformability is an important but very challenging task in the analysis and design of underground structures in rock. Although various empirical (correlation) methods have been developed for determining the deformation modulus of rock masses, they come in many forms and are scattered in different sources.

Mar 1, 2020 · Understanding rock deformation processes in solid Earth materials, from the crystal to the tectonic plate scale, is essential for characterising the e…

Dec 1, 1983 · This paper describes laboratory investigations of the deformation characteristics of rock joints under normal and shear loading. Normal deformability …

Nov 29, 2024 · The failure mechanisms of engineering rock masses primarily involve tensile and shear failure. Differentiating between the acoustic emission (AE) signals generated during the tensile and shear damage processes in rock can provide a scientific basis for the classification of acoustic signals in field rock fracture monitoring.

Sep 1, 2024 · In terms of laboratory tests, creep tests on rock in laboratory offer the advantage of providing controlled conditions to study the time-dependent deformation behavior of rocks, allowing for the characterization of creep properties and the development of predictive models for long-term geological and engineering applications.

Apr 1, 2001 · The static modulus of deformation is among the parameters that best represent the mechanical behaviour of a rock and of a rock mass, in particular when it comes to underground excavations. This is why most numerical finite element and boundary element analyses for studies of the stress and displacement distribution around underground excavations are based on this parameter. The deformation ...

Sep 1, 2000 · Abstract Experiments performed to high strains in simple shear are necessary to resolve many important problems in rock deformation, including the simulation of non-coaxial deformation, the exploration of the influence of strain on rheology, and the development of mineral segregation, dynamic recrystallisation, and other aspects of microstructure. Using a new torsion system we are able to ...

Jun 1, 2024 · The WSR model was used in the simulation of the deep unloading tension fractures in JP-I. The rock-mass heterogeneous rheological properties were summarized as the heterogeneity of the rock-mass strength parameters during age deterioration and the heterogeneity of rock-mass deformation during age evolution.