Adilkhan Baibatsha is a Professor in Kazakh National Technical University named after K.I. Satpayev, Republic of Kazakhstan. His main research fields are Mineral deposits, Earth dynamics, the mineralogical studies, the problem of developing the theoretical, methodological provisions of assessment, forecasting of natural, anthropogenic factors and geo-environmental condition of mining. His Research results went into the regulations for the design of mine workings, technological regulations on management and safety of mining operations in underground mines. He is the author of more than 450 scientific publications including 36 monographs, textbooks.
In the Paleozoic Kazakhstan was a separate continent and consisted of three concentric rings of bounded geometry sutures. The rings under the active influence of mantle plume made vertical movement and their axes made horizontal movement. The development of variously oriented lineaments led to the formation of clumpy-block structure. The modern structure of Kazakhstan was formed during the interaction with Europe, Siberia and southern continents during the Paleozoic-Cenozoic. The end of the century was marked by a dramatic breakthrough in understanding of the deep Earth's interior based on well-designed studies including the subsurface geophysical studies, ultra-deep continental and oceanic drilling as well as instrumental studies at the Earth's surface and from the space. New data on the deep structure of the crust and upper mantle of continents form complex studies of the international system geo-traverses were collected. Some of them have been laid through the territory of Kazakhstan. On their basis, the models of the lithosphere to a depth of 100-200 km in the Republic were established which revealed non-uniform-block structure of the upper mantle. At a depth of about 200 km, the mantle electrical resistance is dramatically reduced which presumably is linked with the rise of the roof of the asthenospheric layer. The structures of the crust in some cases are continuing in the upper mantle. Asthenosphere in the geo-suture areas rise to the level of 80-100 km and asthenolith penetrate above the Moho in the crust.
Dr. Goh Thian Lai has completed his PhD at the age of 41 years from National University of Malaysia. He is the editor of Sains Malaysiana journal. He has published more than 10 papers in reputed journals.
Geomechanical strength of rock materials plays a significant role in influencing the stability of both cut rock slopes and underground openings. The characteristics of mechanical strength are subjected to both material strength and condition of weathering. This paper presents the results of a systematic research to quantify the mechanical characteristics of fresh as well as slightly weathered granites of Peninsular Malaysia. A total of 298 geomechanical strength tests were conducted for fresh as well as slightly weathered rock material employing the uniaxial compressive strength test and Brazilan tensile strength test. Statistical analysis of the results at 95 percent confidence level exhibited that the means of compressive strength for fresh and slightly weathered granites were 113.67.0 MPa and 68.93.6 MPa. The respective mean values of tensile strength for fresh and slightly weathered granites were 8.80.4 MPa and 5.30.1 MPa. The results revealed that the geomechanical strengths of fresh rock material deteriorated by approximately 1/3 upon weathering of rock material reduce to slightly weathered rock materials. The results also exhibited that the Brazilan tensile strength for fresh and slightly weathered granites is approximately 1/13 of uniaxial compressive strength.