Current location - Education and Training Encyclopedia - Graduation thesis - Institute of Geomechanics, Chinese Academy of Geological Sciences
Institute of Geomechanics, Chinese Academy of Geological Sciences
The Institute of Geomechanics of Chinese Academy of Geological Sciences has professional advantages in the research fields of structural geology, neotectonics and geological disasters, in-situ stress and regional crustal stability evaluation, oil and gas geology and ore field structure, Quaternary geology and environment. International Association of Engineering Geology and Environment (IAEG) specialized committees on neotectonics and geological disasters, geological society of china geomechanics, Quaternary geology and glaciers, and paleomagnetism are affiliated to our institute, and they sponsor the academic journal Geomechanics.

In 2008, it undertook a total of 82 projects/kloc-0, including 2 national science and technology projects1,7 national natural science foundation projects 17, 8 projects 18 projects of Ministry of Land and Resources, 0/9 projects of land and resources survey, and other projects 100.

In 2008, it undertook a total of 95.68 million yuan for various scientific research projects. Among them, the national (Ministry of Science and Technology) science and technology project funds are 39.08 million yuan; The national natural science foundation project funds are 6,543,800 yuan+0,950 yuan; The project funds of the Ministry of Land and Resources are 9.93 million yuan; Geological survey project funds 27.36 million yuan; Expenses of other projects (including director's fund and horizontal projects)17.35 million yuan.

In 2008, 12 scientific and technological achievements passed the expert review and acceptance, including 7 geological survey projects, 6 excellent, and good 1; Five natural fund projects passed the final acceptance. As the second and third winners, the Institute won two second prizes of the 2008 Land and Resources Science and Technology Award, and as the second winner, it won the third prize of the 2008 Hebei Science and Technology Progress Award 1 item. The research achievements of new structure and ancient Great Lakes in Qinghai-Tibet Plateau were selected as the top ten geological and scientific achievements in geological society of china in 2008. The new progress of iron ore prospecting in the east of Altun Mountain was rated as the top ten scientific and technological progress of Chinese Academy of Geological Sciences in 2008. In 2008, he published 1 15 academic papers and 4 monographs.

Zhao Yue, deputy director, researcher.

He Changhong, Deputy Secretary of Party Committee, Secretary of Discipline Inspection Commission, Senior Engineer

Li Guishu, deputy director and researcher.

Director Long Changxing, researcher

Main scientific research achievements in 2008

Investigation and Evaluation of Crustal Stability along Yunnan-Tibet Railway: It belongs to the large-scale investigation project of land and resources, and the main personnel are Zhang Yongshuang, Hu Daogong, Wu Zhonghai, Zhang, Zhao, Jiang, Guo and Shi Jusong. The project team carried out a comparative study of Quaternary strata along the Yunnan-Tibet Railway, compiled the planation plane distribution map along and around the railway for the first time, studied and summarized the distribution, latest activity age, segmentation and activity mode of 5 1 active faults in the region, conducted key investigation, trench exposure and sampling test on 20 active faults crossing or nearly parallel to the railway, and redefined 14 important faults along the railway. The possible geological disasters and major engineering geological problems are systematically investigated, predicted and evaluated, the main engineering geological characteristics of special rock and soil along the railway are deeply studied, and practical engineering discrimination indexes are put forward. Based on active faults, seismic activity, geothermal field, tectonic stress field, topographic deformation field, engineering geological rock groups and geological disasters, the crustal stability and engineering geological stability along Yunnan-Tibet railway are comprehensively evaluated by using the information weighted superposition method based on Arc GIS, and the optimization scheme of route selection is put forward, which has an important role in guiding railway line selection.

Lancang river fault zone

The members of the project team are carrying out fracture measurement.

Technicians installed microseismic station equipment in Shashan, Shizigou, Qaidam Basin.

Technicians are installing microseismic stations.

Application of natural seismic tomography technology of microseismic network: It belongs to one of the projects of strategic investigation and evaluation of oil and gas resources in Qaidam Basin (XQ-2004-0 1) which is under the responsibility of China Petroleum Qinghai Oilfield Company. Main personnel: Wang Xiaofeng, Ma Yinsheng, An, Shi Danian, Qu, Huo Guanghui,. The overall goal and task is to analyze the deep geological structure of Yingxiongling Depression and its surrounding areas by using the natural seismic tomography technology of microseismic network, and to explore new methods for deep structural exploration in complex terrain areas by combining the comprehensive analysis of geological, physical, chemical and remote sensing data in the western Qaidam Basin. After arduous field construction, data acquisition, data processing, wave velocity inversion and geological interpretation, the natural seismic tomography technology of microseismic network was first applied to deep structural exploration in oil fields in China. Under the condition that there are no examples for reference in China, after nearly four years of introduction-absorption-innovation practice, the technical method system of deep structure detection of mesoscale microseismic network has been initially established. The layout principle, recording parameter selection, high-quality data acquisition standard and data processing flow of microseismic network for mesoscale structural detection are established. The workflow and results of velocity structure inversion of mesoscale natural seismic tomography are established. The geological interpretation standard of meso-scale natural seismic tomography results has been initially formed; The deep structural information of Shizigou-Youyuangou area and Ganchaigou-Xianshuiquan area in western Qaidam is obtained. The natural conditions in this area are harsh and the terrain is complex, so it is difficult to implement artificial earthquakes. Remarkable progress has been made in the study of new technical methods for oil and gas resources evaluation. Its achievements were rated as the top ten scientific and technological progress of Chinese Academy of Geological Sciences in 2006.

Velocity structure map of seismic reflection profile in Shizigou area

Evaluation of deep oil and gas accumulation potential in eastern superimposed basin: it belongs to the large-scale investigation project of land and resources and has excellent results. Main completion personnel: Long Changxing, Zhou Xingui, Zhang, Liu,,, Xiao Weifeng. Guided by geomechanics theory and combined with many disciplines, the project team systematically studied the deep oil and gas accumulation potential in Bohai Bay-South North China Basin. It is considered that the formation and evolution of the basin are mainly controlled by the banded tectonic system and the Neocathaysian tectonic system. It is the first time to put forward a new model of basin-mountain deformation system under the background of multi-level detachment of Bohai Bay-South North China Basin, which is a unified extension from late Mesozoic to now. The Paleogene and pre-Jurassic geological maps of Bohai Bay-South North China Basin were compiled for the first time, and the influence of superimposed basin reconstruction on Paleozoic oil and gas accumulation since Mesozoic was studied. The distribution map of 65438+200,000 upper and lower Paleozoic source-reservoir-cap assemblages and the evaluation map of self-generated and self-stored oil and gas accumulation potential were compiled for the first time in Bohai Bay-South North China Basin. Combined with the three evaluations of the necessary conditions for deep oil and gas exploration and accumulation, the potential of deep oil and gas accumulation is evaluated around the two core issues of "effective hydrocarbon generation area and favorable preservation unit", and the favorable exploration areas for deep oil and gas are clearly pointed out.

Study on the prospecting model of endogenetic gold and copper deposits in the eastern mountainous area of Jilin and Heilongjiang: It belongs to the land and resources survey project of China Geological Survey, and the main personnel are Meng Xiangang, Shao, Zhu Dagang, Han Jianen and Yoga Yu. Through field investigation and indoor comprehensive research, the project has made the following progress: the regional tectonic system and its rock-controlling and ore-controlling functions in the historical evolution process have been clarified, and the diagenesis and mineralization of the abundant endogenetic gold-copper polymetallic minerals in eastern Jilin and Heilongjiang Province are mainly controlled by the Neocathaysian, zonal, meridional and NW structural belts. Lithospheric units and metallogenic belts in eastern Jilin-Heilongjiang are divided, and the metallogenic characteristics of structural belts in this area are compared, and the stages of mineralization and structural evolution of structural layers are compared, and the tectonic metallogenic sequence is divided. A macroscopic three-dimensional geological model of tectonic dynamic diagenesis and mineralization in this area is established. In the macroscopic three-dimensional geological model of tectonic dynamic diagenesis and mineralization, the source and process of diagenesis and mineralization materials of gold and copper deposits are briefly described. The structural ore-controlling analysis of typical ore deposits is carried out, and the kinematics and dynamics analysis are carried out in stages according to the analysis of X-ray rock group and magnetic fabric. This paper summarizes the most distinctive structural ore-controlling types in this area, revises, perfects and establishes eight ore-controlling types and models, and establishes the finite element mathematical model and the gold-copper prospecting model in the eastern part of Jihei for the first time.

Study on the east-west dextral thrust fault zone in the northern margin of North China

On-site acceptance of project results by expert group

Beishan vein and occurrence of Xiaoxinancha gold-copper mine

Mineralization veins of Jiusangou copper-gold deposit

Investigation and Monitoring of Active Faults on Qinghai-Tibet Railway: It is a geological survey project, with the project leader being Hu Daogong, Wu Zhonghai, Wang, Chen Qunce, etc. Relevant achievements were selected as the top ten scientific and technological progress of Chinese Academy of Geological Sciences in 2006. For Kusaihu fault, Xidatan fault, Wenquan basin western boundary fault, Amdo basin northern boundary fault, collapse fault, Gulu basin western boundary fault and Dangxiong-Yangbajing active fault, through high-resolution remote sensing interpretation, fault geomorphology analysis, trench exploration engineering exposure and high-precision dating, the active period, active rate and paleoseismic period of late Pleistocene and Holocene faults are revealed. A GPS local area network consisting of 15 measuring points was established along the Qinghai-Tibet Railway in the middle part of Lhasa block, and the third phase of GPS survey was completed, which accumulated high-precision measurement data for analyzing the current crustal movement and fault rate along the Qinghai-Tibet Railway. In-situ stress drilling and in-situ stress measurement of Xidatan 180m, Wudaoliang 150m, Amdo 120m, 300m of Yangbajing and Qushui 150m were completed, and the in-situ stress curves of different plots on the Qinghai-Tibet Plateau were obtained. A comprehensive monitoring station for three-component stress of Xidatan, Amdo, Yangbajing and Qushui was established, which realized remote automatic transmission of monitoring data and initially established a comprehensive monitoring system for stress and strain along the Qinghai-Tibet Railway. The formation mechanism, disaster effect and engineering influence of crack-induced moving dome are calculated and analyzed by using three-dimensional finite element numerical simulation method and ANSYS software. The discovery of hidden dangers such as 83 moving ice mounds and sand damage in Cuona Lake provides an important basis for the prevention and control of geological disasters along the Qinghai-Tibet Railway. The project published 24 academic papers, including 3 papers from international core journals, and published monographs 1 department.

Profile photos of active fault gullies in northern Amdo basin

Project members conducted field observation in winter along the Qinghai-Tibet Railway.

Researcher Wu Zhenhan attended the opening ceremony of Qinghai-Tibet Railway.

Investigation and evaluation of Quaternary environment in the eastern margin of Qinghai-Tibet Plateau: it belongs to a large-scale investigation project of land and resources, and its personnel are Wang Shubing, Qiao, Xu Gang, Fu Jianli, Li, Yao Haitao, Liu Zongxiu, Jiang Fuchu, Peng Yang, Li, Mou Chuanlong,. The results are as follows:

(1) According to the investigation, the land desertification in Zoige is distributed in the north-south direction, mainly located in the piedmont alluvial-diluvial platform and intermountain basin. The analysis of desertification factors shows that the influence of natural and human factors is almost the same. Precipitation and wind speed are the main natural factors of grassland desertification. Among the human factors, population, livestock and reclamation scale are the main factors, and some countermeasures and suggestions are put forward.

(2) There are B/M boundary and Jia Ramilo event in the lateritic magnetic stratum of western Sichuan loess, and the western Sichuan loess has a good spatial correspondence. The loess in western Sichuan has the characteristics of aeolian dust and glaciers, indicating that the material mainly comes from the ice water deposition in the Qinghai-Tibet Plateau and its surrounding areas. The genetic analysis of red soil shows that it is aeolian.

(3) Xigedagu Lake was mainly formed in the Gauss period and in the Great Lakes period on the eastern edge of the Qinghai-Tibet Plateau, about 4-3Ma BP ago. The typical profile recorded five cycles and 15 stages, organic carbon recorded nine stages of paleoclimate change from cold to warm, and sporopollen and isotope analysis also recorded the periodic changes of paleoclimate and environment between 4-2.6Ma BP.

Ganzi Loess Profile and Magnetic Strata

Members of the project team took a group photo in the wild.

Measuring loess stratum profile

Investigation and evaluation of crustal stability in the west section of the West-East Gas Transmission Project (Yumen-Wuwei): It belongs to the large-scale investigation project of land and resources, and the main personnel are Chen Bailin, Zhang Yongshuang, Liu Jianmin, Dong Cheng, Liu Jiansheng, Wang Chunyu and Wu Naifen. Significant progress has been made:

The research shows that the faults in the northern margin of Qilian Mountain, the central and western basins of Hexi Corridor, the southern margin of Longshoushan Mountain and the eastern segment of Altun Fault belong to the late Pleistocene-Holocene active faults. It is found that Gaotai fault and Xinminbao fault are the forefront faults in the thrust nappe structure on the northern margin of Qilian Mountain, with the latest formation age and the strongest Holocene activity. It is the first time to obtain the current geostress data of Shankou in northern Jiangsu, especially the valuable data of geostress value changes before and after Sunan earthquake and Minle earthquake. By quantifying the stability evaluation factors of 14 region, the comprehensive evaluation parameters of 128 evaluation unit in the region are calculated, and three extremely unstable-unstable regions and two sub-unstable regions are divided. According to the actual situation that the west-to-east gas pipeline passes through extremely unstable areas, the suggestion of "monitoring the current geostress and displacement rate of active faults and Fengle activities in Xinmin Fort and Gao Tai Station" is put forward.

Schematic diagram of geological structure of west section (Yumen-Wuwei) of West-East Gas Transmission Project

Comprehensive Evaluation Map of Crustal Stability in West Section of West-East Gas Pipeline Project (Yumen-Wuwei)

Comprehensive study on the formation and evolution of major sedimentary basins in western China and the enrichment and accumulation of oil and gas resources (Qaidam part): It belongs to the comprehensive research project of China Geological Survey, and the main personnel are: Wang Xiaofeng, Ma Yinsheng,,,,,,,,, Jiang Rongbao, Li Li, An, Jeon So-yeon, Wang Zhishun, Li Zhongjian, Wang Baoyu and Zhang Zixin.

The main progress: the formation and evolution of Qaidam Basin and the accumulation of oil and gas resources are comprehensively studied from four aspects: geological structure characteristics and its evolution history, Carboniferous stratigraphic characteristics and lithofacies palaeogeography, tectonic stress field, fluid potential field, oil and gas distribution law and oil and gas resources prospect. The structural system of Qaidam basin is divided, and the structural attributes of the basin are defined. The Carboniferous biostratigraphic correlation table of the basin and its surrounding areas is compiled, and the Carboniferous strata are divided and compared. A series of basin tectonic map were compiled. The stress and strain measurement and tectonic stress field simulation of the basin are carried out. The oil and gas distribution law and oil and gas resource prospect of Carboniferous and Mesozoic are comprehensively evaluated. On February 27, 2008, 65438, China Geological Survey organized a review of the project results, and the results were excellent.

Inward inclined structure in Qaidam basin

The members of the project team made a field investigation in the river basin.