Deformability characteristics of jointed rock masses under uniaxial compression

Influence of the geometry of partially-spanning joints on mechanical properties of rock in uniaxial compression

“…More recently, Prudencio and Van Sint Jan (2007) performed experimental tests on physical models of rock with nonpersistent joints and found that the failure modes and maximum strengths of rock samples were dependent on the geometry of the joint systems, the orientation of the principal stresses, and the ratio between intermediate stress and intact material compressive strength. Chen et al (2012) investigated the combined influence of joint inclination angle and joint continuity factor on the deformation behavior of jointed rock mass for gypsum specimens with a set of non-persistent open flaws in uniaxial compression and revealed that the deformation behavior of the jointed rock mass was correlated to the closure of preexisting joints, the development of fractures in the rock matrix and teeth shearing of the shear plane. Wasantha et al (2012a) developed constitutive models to describe the influence of joint geometry on the uniaxial compressive strength of rock containing partially-spanning joints using existing experimental data from uniaxial compressive strength tests.…”

Mechanical behavior of rock-like jointed blocks with multi-non-persistent joints under uniaxial loading: A particle mechanics approach

“…The non-persistent joint geometry configurations used by Chen et al (2011Chen et al ( , 2012 in their laboratory experiments performed on jointed blocks made out of a model material are used in this study to perform numerical simulations using PFC 3D . The model material used was a mixture of gypsum and water in the ratio of 1.0: 0.6 by weight.…”

“…Even though these jointed blocks included a significant number of joints, all the included joints were persistent joints. Only a very few experimental studies have been done using a significant number of non-persistent joints (Mughieda, 1997;Prudencio and Van Sint Jan, 2007;Chen et al, 2011Chen et al, , 2012. The mechanical behavior of jointed blocks having a significant number of non-persistent joints is more complicated and significantly different to that having persistent joints.…”

Experimental and Numerical Study of Failure Behavior and Energy Mechanics of Rock-Like Materials Containing Multiple Joints

“…To better understand the mechanical behavior of jointed rock or rock-like materials, substantial experimental efforts have been devoted to the study of crack initiation, propagation, and failure modes of precracked rocks or rock-like specimens. Many kinds of joint geometries have been considered in previous works, such as joint inclination angle [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], joint distance [3,[15][16][17][18], and overlap distance [17][18][19]. At the same time, there are many kinds of materials that have been used by scholars, such as glass [5], Columbia Resin 39 [20], and molded gypsum [15,[21][22][23][24].…”

“…Apart from specimens with single, two, or three fissures, the failure pattern of jointed specimen has also been investigated by scholars. The failure patterns of multiplejointed specimen include stepped path failure [3,12,[16][17][18]; shearing failure [3,12]; block rotation failure [18]; and intact failure [3,12,16].…”