In recent decades,colleagues working in the Discipline of Geological Resources and Geological Engineering at Central South University made significant progress in theoretic study and application of geophysics,ore depo...In recent decades,colleagues working in the Discipline of Geological Resources and Geological Engineering at Central South University made significant progress in theoretic study and application of geophysics,ore deposit and shale gas geology,3 D predictive modeling of concealed resources,and geological engineering.In geophysics,world-class progress was achieved in the development,data processing,equipment,and scientific survey of electromagnetic method in onshore and offshore environments and the tectonic evolution of the Tibetan Plateau.Especially,advanced wide-field electromagnetic exploration method and equipment as a highlight technique won the first prize of National Science and Technology Invention of China.In ore geology,progressive and complex characteristics of most nonferrous ore deposits and the geodynamic relationship between crust-mantle reaction and mineralization in south China were revealed.Progressive metallogenic models of certain typical ore deposits were established based on the study of fluid inclusion and geochemistry.According to characteristics of complex metallogenic system of polygenetic ore deposit,key ore-controlling factors were found and summarized.The investigation on unconventional resources advanced China’s shale gas resource evaluation system.In 3 D predictive modelling of metallogenic,a large-scale location prediction model was established for exploration of crisis mines and concealed ore deposits.Our developed 3 D predictive modeling techniques for concealed orebodies were widely used to explore deep mineral resources in China.In geological engineering area,the key technologies for deep drilling into complex formations were developed.Especially the drilling fluid and tools were utilized in the fieldwork.The rock and soil mechanics analysis method and anchor technologies were also established and applied to engineering practice.展开更多
After water is impounded in a reservoir, rock mass in the hydro-fluctuation belt of the reservoir bank slope is subject to water saturation- dehydration circulation （WSDC）. To quantify the rate of change of rock mec...After water is impounded in a reservoir, rock mass in the hydro-fluctuation belt of the reservoir bank slope is subject to water saturation- dehydration circulation （WSDC）. To quantify the rate of change of rock mechanical properties, samples from the Longtan dam area were measured with uniaxial compression tests after different numbers （1, 5, 10, 15, and 20） of simulated WSDC cycles. Based on the curves derived from these tests, a modified Hock- Brown failure criterion was proposed, in which a new parameter was introduced to model the cumulative damage to rocks after WSDC. A case of an engineering application was analyzed, and the results showed that the modified Hock-Brown failure criterion is useful. Under similar WSDC-influenced engineering and geological conditions, rock mass strength parameters required for analysis and evaluation of rock slope stability can be estimated according to this modified Hoek-Brown failure criterion.展开更多
A high efficiency method is very important in geological survey for a new city in China.Geophysical parameters are Measured While Drilling(MWD),and these parameters are processed and explained on the ground,so the met...A high efficiency method is very important in geological survey for a new city in China.Geophysical parameters are Measured While Drilling(MWD),and these parameters are processed and explained on the ground,so the method can replace conventional engineering geological exploration for drilling rock sample.According petroleum engineering MWD,using the different characters of different rock absorbs γ radial,with the method of storing data in hole and explaining data on the ground,engineering geological exploration formation density MWD is researched.The MWD works stabilized,and the performance is good with precise data.展开更多
文摘In recent decades,colleagues working in the Discipline of Geological Resources and Geological Engineering at Central South University made significant progress in theoretic study and application of geophysics,ore deposit and shale gas geology,3 D predictive modeling of concealed resources,and geological engineering.In geophysics,world-class progress was achieved in the development,data processing,equipment,and scientific survey of electromagnetic method in onshore and offshore environments and the tectonic evolution of the Tibetan Plateau.Especially,advanced wide-field electromagnetic exploration method and equipment as a highlight technique won the first prize of National Science and Technology Invention of China.In ore geology,progressive and complex characteristics of most nonferrous ore deposits and the geodynamic relationship between crust-mantle reaction and mineralization in south China were revealed.Progressive metallogenic models of certain typical ore deposits were established based on the study of fluid inclusion and geochemistry.According to characteristics of complex metallogenic system of polygenetic ore deposit,key ore-controlling factors were found and summarized.The investigation on unconventional resources advanced China’s shale gas resource evaluation system.In 3 D predictive modelling of metallogenic,a large-scale location prediction model was established for exploration of crisis mines and concealed ore deposits.Our developed 3 D predictive modeling techniques for concealed orebodies were widely used to explore deep mineral resources in China.In geological engineering area,the key technologies for deep drilling into complex formations were developed.Especially the drilling fluid and tools were utilized in the fieldwork.The rock and soil mechanics analysis method and anchor technologies were also established and applied to engineering practice.
基金supported by the National Natural Science Foundation of China under No. 41630639the National Basic Research Program of China (2014CB744703)+1 种基金Natural Science Basic Research Plan in Shaanxi Province of China (No. 2016JQ4014)China Postdoctoral Science Foundation (2016M602743)
文摘After water is impounded in a reservoir, rock mass in the hydro-fluctuation belt of the reservoir bank slope is subject to water saturation- dehydration circulation （WSDC）. To quantify the rate of change of rock mechanical properties, samples from the Longtan dam area were measured with uniaxial compression tests after different numbers （1, 5, 10, 15, and 20） of simulated WSDC cycles. Based on the curves derived from these tests, a modified Hock- Brown failure criterion was proposed, in which a new parameter was introduced to model the cumulative damage to rocks after WSDC. A case of an engineering application was analyzed, and the results showed that the modified Hock-Brown failure criterion is useful. Under similar WSDC-influenced engineering and geological conditions, rock mass strength parameters required for analysis and evaluation of rock slope stability can be estimated according to this modified Hoek-Brown failure criterion.
文摘A high efficiency method is very important in geological survey for a new city in China.Geophysical parameters are Measured While Drilling(MWD),and these parameters are processed and explained on the ground,so the method can replace conventional engineering geological exploration for drilling rock sample.According petroleum engineering MWD,using the different characters of different rock absorbs γ radial,with the method of storing data in hole and explaining data on the ground,engineering geological exploration formation density MWD is researched.The MWD works stabilized,and the performance is good with precise data.
