Hasan Ali Abbas

Madenat Al-Elem University College (MAUC) | MAUC · Civil engineering department

The mapping of failure that uses acoustic emission (AE) is an advanced approach when tracking the location of cracks in rock materials under progressive stress. However, attenuation of the acoustic wave significantly affects the identification of the acoustic source. The isotropic attenuation model suggests a constant attenuation in all rock materi...

The failure mode limitations presented in the International Society for Rock Mechanics (ISRM) were recognised as an obvious issue by invalidating most of the failure modes along the bedding plane. In this study, the anisotropic behaviour of index strength and failure mode of weathered shale are evaluated by utilising the point load test (PLT) and t...

Characterizing the elastic response from body waves propagating through an interbedded shale-sandstone geological formation with multi-orientation joints and various interlayer ratios is extremely challenging. A laboratory composite model of three layers, i.e., sandstone-shale-sandstone, with multi-angled joint orientations, i.e., 30°, 45°, 60°, an...

Acoustic emission has a series of successful studies in mapping of brittle isotropic rock material. However, the underground lithology isn't ideally homogenous as a laboratory specimen. Particularly, for anisotropic, soft, jointed, weathered rock mass, the need for more realistic model is still there. This study investigates the main issues faced i...

The failure mode limitations presented in the International Society for Rock Mechanics (ISRM) were recognised as an obvious issue by invalidating most of the failure modes along the bedding plane. In this study, the anisotropic behaviour of index strength and failure mode of weathered shale are evaluated by utilising the point load test (PLT) and t...

significantly decreased. In comparison, the wave velocity values were reduced by 35% and 66% for V P and V S , respectively, as were the increment angles of joint orientation from 30° to 90°. The anisotropic behavior of wave velocity for the composite model appears to be influenced by the joint orientation rather than the bedded shale interlayer. T...

The failure mode limitations presented in the International Society for Rock Mechanics (ISRM) were recognised as an obvious issue by invalidating most of the failure modes along the bedding plane. In this study, the anisotropic behaviour of index strength and failure mode of weathered shale are evaluated by utilising the point load test (PLT) and t...

The heterogeneity of interbedded weathered sandstone-shale sedimentary Kenny Hill formation is the major challenge for geotechnical engineers to evaluate this rock mass behavior, particularly, due to the anisotropy induced by the weathered shale bedding plane orientation and interbedded joint interface orientation. This study aimed to evaluate the...

An extensive review on the anisotropy of rock samples has been carried out to characterize the velocity and strength behaviors under a variety of geometrical and mechanical conditions. Primarily, the causes and impacts of anisotropy is discussed to further understand the importance of the effect of such material from an engineering point of view. T...

Unloading point method UPM recognized as a relevant analyzing approach to obtain the static soil resistance (bearing capacity) for the Statnamic loading test. This method designated to fulfill that purpose is based on two essential assumptions; firstly, is the linear damping value along the test duration and secondly, the rigid body assumption for...

Shear modulus (G) is one of the most important parameters in geotechnical design to ensure adequate margin of safety is maintained in the design of constructions such as buildings. There is a direct relationship between the shear modulus and shear wave velocity (Vs) which can get easily from Seismic methods. Some of Seismic methods have shortages w...

Unloading point method UPM recognized as a relevant analyzing approach to obtain the static soil resistance (bearing capacity) for the Statnamic loading test. This method designated to fulfill that purpose is based on two essential assumptions; firstly, is the linear damping value along the test duration and secondly, the rigid body assumption for...

An extensive review on the anisotropy of rock samples has been carried out to characterize the velocity and strength behaviors under a variety of geometrical and mechanical conditions. Primarily, the causes and impacts of anisotropy is discussed to further understand the importance of the effect of such material from an engineering point of view. T...

An extensive review on the anisotropy of rock samples has been carried out to characterize the velocity and strength behaviors under a variety of geometrical and mechanical conditions. Primarily, the causes and impacts of anisotropy is discussed to further understand the importance of the effect of such material from an engineering point of view. T...

An extensive review on the anisotropy of rock samples has been carried out to characterize the velocity and strength behaviors under a variety of geometrical and mechanical conditions. Primarily, the causes and impacts of anisotropy is discussed to further understand the importance of the effect of such material from an engineering point of view. T...

An extensive review on the anisotropy of rock samples has been carried out to characterize the velocity and strength behaviors under a variety of geometrical and mechanical conditions. Primarily, the causes and impacts of anisotropy is discussed to further understand the importance of the effect of such material from an engineering point of view. T...

For more than two decades ago after the first statnamic loading test and until now a days, the unloading point method (UPM) still used for the statnamic test analysis as a standard for driving the static load-displacement in the world. Even after shows this method to some uncertainties when it used in conditions out of the limitation of this method...