Abstract:This paper briefly reviews the main achievements of Institute of Exploration Technology in the technology innovation, research results transfer mation and base construction for 35 years, points out the key fields of geological survey and the research work and priority development direction during the “12th Five-Year Plan”.

Abstract:A deep landslide displacement monitoring instrument with the function of torsion direction measurement is developed for the monitoring and warning of landslide geological hazards，by the sensor with torsion direction measurement and deep displacement and data acquisition, the whole process of landslide can be monitored to study the change process and regularity of torsion directions and deep displacement of landslide body before and after the sudden sliding. In this paper, auto-monitoring and wireless Internet technologies are also studied to realize real-time monitoring of landslide torsion direction and deep displacement for whole process, which will promote the technical progress for landslide geological hazard monitoring.

Abstract:An embedded acquisition and transmission terminal is presented, which is researched based on μC/OS-Ⅱoperating system by using internet of things monitoring and control technology to realize real-time monitoring of the parameters of landslide and debris flow and establish the round-the-clock real-time monitoring system with functions of multi-parameter remote telemetry and starting awakening as well as fault diagnosis. This system can provide effective technical support for geological disaster prevention and mitigation. The paper introduces the design principle of the terminal and the designs of software and hardware.

Abstract:In this paper, study of a non-contact method, visual monitoring of landslide, camera in real-time monitoring on the fixed point on the landslide surface and installation of the target using close-range, digital image obtained by automatic processing analysis, to calculate the deformation of the earth's surface, through the wireless transmission to the interior monitoring center, combined with real-time landslide appearance image, compared with other monitoring parameters confirm, exploring the whole process monitoring and early warning of landslide.

Abstract:The paper introduces the study on stress distribution of steel strand in anchoring section of concentrated tension pre-stressed anchor cable by magnetic flux sensor, the stress transfer and distribution of steel strand in anchoring section are analyzed. Combined with long-term monitoring, the steel strand stress loss in anchoring section and the laws of stress distribution adjustment of steel strand in anchoring section before and after stretch locking are analyzed. The study and the application show that magnetic flux sensor technology can be an effective method for basic cable test and steel strand stress distribution detection in other tests.

Abstract:A self-developed quick installation device for metal anchor cable is introduced; the prototype was developed by the study on the auxiliary installation device in the structure design, processing, laboratory tests and construction technology research. Field test results show that with its unique structure and properties, the anchor cable auxiliary installation device has the characteristics of strong practicability and easy site operation in construction, which can not only greatly reduce the labor intensity, but also can increase the speed of the anchor cable installation and technical reliability in the large-diameter and long anchor cable construction in the complex formation. The auxiliary installation device of anchor cable is especially suitable for the steep slope anchor cable construction.

Abstract:China is a country with complicated topography landforms and geological disasters widely distributed, and is one of the landslide-prone countries in the world. As landslides and debris flows are of harmful natural disaster type to human being, the effective real-time monitoring on landslides become very important. The landslide monitoring instruments are often being damaged because the most are installed in the mountains where few people live or being uninhabited, and what is more, the people have less awareness of geological disasters monitoring. Based on the landslide monitoring projects in Danba County, the paper summed up the experiences of the field installation and the protection of landslide monitoring instrument.

Abstract:Haermu ravine is located in the middle reaches of Zagunao river and belongs to “5·12” Wenchuan earthquake area, where debris flow rushed down many times in the history and once blocked off Zagunao river in August 1989. By the influence of “5·12” earthquake, the debris flow is with the characteristics of larger scale, higher occurrence frequency and longer active period than before. Based on the analysis on natural environment background of Haermu ravine, it is found that the topography and precipitation conditions of Haermu ravine are conducive to the outbreak of debris flow; by the influence of neotectonics movement and earthquake, large amount of slumped mass developed in ravine domain, which provides a wealth of loose solid material for debris flow. Currently, due to the enough loose solid material and the low rainfall threshold of debris flow, debris flow takes place every year in recent 5 years. According to the specific conditions of Haermu ravine, the disaster control idea of interception combined with drainage was proposed, blocking dam was built to regulate the peak flow of debris flow and drainage canal was utilized to drain the debris flow to the main river. Through nearly 5 hydrologic years, good effects of control engineering are presented.

Abstract:A gas well site is located in a fill platform, the landslide disaster occurred for 3 times, because the soil filling was not consolidated when the construction was started. The treatment solutions for 3 landslides were ground drainage grouting reinforcement anti-slide pile, the anti-slide pile retaining wall reinforcement and micro combination anti-slide pile Based on the characteristics of landslide in the natural gas well fill, the treatment engineering and the effects are analyzed, and the action effects of micro combination anti-slide pile technology used in this landslide treatment is especially analyzed.

Abstract:This paper takes Zuogelietuo debris flow in Meigu County of Liangshan Prefecture as a research object, and analyzed the risk of debris flow in aspects of topography and geomorphology and the generation conditions. Based on the actual situations, corresponding measures (blocking and drainage) are put forward.

Abstract:Take the example of plane-shoving slide collapse in Tongjiang, by the analysis on the formation conditions and incentive mechanism, the control measures are obtained. For the shape, a group of paralleled tension cracks develop above the steep rock with width of 1m, both sides is enclosed. In heavy rainfall, the surface water flow into the cracks, in addition to the hydrostatic pressure and hydrodynamic pressure, the splitter action of instantaneous high head in cracks promotes the development of cracks. At the same time, the sand stone layer of the upper part will push outward along the weak interlayer; while the free surface is produced by extruding shift, collapsing will occur. This model is plane-shoving shift, collapsing, shift again and collapsing again. In order to eliminate the hidden troubles of this type of landslide disasters, in the premise of collapse control, reducing effects of water on the slope must also be considered, as well as the engineering measures to prevent cracks.

Abstract:Landslide is not only a direct disaster, but also can cause secondary disasters, huge surge formed by landslide body falling into the river will bring great harm. The surge height is affected by sliding speed, failure volume, water depth and other important factors; the formation of waves is affected by reservoir terrain, reservoir width, the duration of landslide falling into the reservoir and the width of landslide. Especially in the canyon area, in the wave propagation process, waves are also affected by the obstacles on both sides of the valley, round-trip refraction and wave group mutual interference or superposition. In this paper, Pan Jiazheng surge algorithm is used, under the condition of local landslide instability in Outang, the sliding velocity and surge height by landslide rushing into the reservoir are calculated and predicted; the earthquake action and the resistance of leading edge in reservoir water are considered.

Abstract:Take the example of deformation and failure of landslide in Huanglianshu of Three Gauge and according to the monitoring on ground displacement, rainfall, underground water and the reservoir water level, the effects by the interactions between the changes of monitoring parameters and of hazard factors are analyzed and the deformation and failure mechanism are studied. The paper summed up the preliminary study results which not only has important theoretical significance for monitoring and early warning for landslide, but also has reference value and guiding significance for forecasting just before sliding caused by reservoir water level and rainfall.

Abstract:Zengjiapeng landslide in Three Gorges reservoir area is one of the landslides with less instability, for which the professional monitoring history of 9 years was kept, including surface deformation, deep displacement and other means of monitoring. By the monitoring experience of many years, combining with the actual deformation and failure process of landslide, the analysis and evaluation are made on the practicability and scientific of various monitoring methods, which can provide scientific basis for the same type subsequent landslide monitoring work and make use of resources more concentrated and reasonable. The paper also puts forward reasonable suggestions on monitoring scheme of future.

Abstract:This paper presents the newest achievements on geological hazard study in China through reviewing the special report, session report of the 6th National Academic Conference of Geological Hazard held in Beijing in April 2013. 4 aspects have been mainly introduced in this paper: the mechanism of geological hazard and the strategy of hazard controlling, geological hazard monitoring and early warning, control technology and emergency disposal of geological hazard, regional geological hazard risk management and evaluation. These achievements reflect the progress of recent geological hazard researches. It will be helpful to promote the future studies.

Abstract:The main characteristics of Sichuan geological hazard prevention project are analyzed, which have a great influence on the engineering budget quota compilation. In this paper, the suggestion is made that the work in bidding and completion settlement stages should be further improved on the basis of quota compilation.

Abstract:This article introduces the evolution process of the core drilling methods used in Wenchuan Earthquake Scientific Drilling Project. From PDM/hydro-hammer coring method to top-drive/wire-line coring method and finally to PDM/hydro-hammer/long split barrel coring method, the coring methods used in this project underwent a series of changes. The main reasons for these changes are formation conditions, coring technology improvement and the development.

Abstract:By the analysis on core blockage mechanism with split core barrel for the coring operation of the borehole No.4 of Wenchuan Earthquake Fault Scientific Drilling Project, the paper summarized 4 core blockage forms. Some technical measures to reduce core blockage are suggested for each type of the core blockage form.

Abstract:According to the drilling in complex formations and based on the principle of wire-line drilling, the study on new methods for casing drilling for geological exploration are made by using coring drilling with retractable bit without lifting, including casing coring tools, casing replacing wire-line coring tube, wall protection and casing drilling processing. Good technical and economic effects are achieved in the field production test, and further improving suggestions are put forward according to the existing problems.

Abstract:Rock sample collection and division technologies for air reverse circulation sampling drilling both in China and abroad are briefly introduced, mainly including the equipments and technologies in America and Australia, as well as the development work in rock sample collection and division technologies carried out by Jilin University; Institute of Exploration Technology, CAGS; and Institute of Exploration Technology.

Abstract:In the water well construction, pneumatic DTH hammer drilling is a kind of fast drilling method, which was widely applied in drought-resistance and water exploration emergency construction in Shandong in 2010 with obvious effects，but deviation appeared in some drilling hole. The causes of hole deviation is analyzed in aspects of geology, process and technology in this paper and prevention measures are put forward to ensure the smooth implementation of subsequent well formation construction.

Abstract:By the force analysis on core barrel in hydro-hammer coring drilling process, this paper discusses the action mechanism of reducing core blockage in hydro-hammer drilling. In addition, the applicable stratum range for hydro-hammer drilling are clarified and the results achieved during the drilling operation for the hole WFSD-4 of Wenchuan earthquake fault scientific drilling project are introduced.

Abstract:When disasters occur, time is life! Only scientific rescue with advanced technologies can achieve good effects in the shortest time. DTH hammer drilling is an advanced technology which can adapt to various complex formations. It is demonstrated by the emergency rescue practice that this technology can play an important role in the life channel drilling, geological disasters control, drought-relief and emergency rescue etc.

Abstract:This paper mainly introduced the GDZ-300L multi-functional fully hydraulics track-mounted rig about its general structure design, power machine selection, hydraulic system design, mechanical drive system design and the main technical parameters, etc.. The prototype trial-production and the field application tests showed that GDZ-300L drilling machine has the advantages of compact structure, light weight, good drilling ability and high reliability.

Abstract:Finite element analysis was made on the modified power head bracket of GDZ-300L drill with ANSYS Workbench to demonstrate the safety and reliability of the structure; the power head bracket design was optimized by using software of Design-Xplorer VT multi-objective optimization model, the influence of each panel thickness to the bracket in equivalent stress and mass are analyzed. On the premise of ensuring the structure strength, a set of optimal solutions are obtained to save structure material and reduce manufacturing cost.

Abstract:By the analysis on the difficulties for DTH Hammer drilling with casing in soft stratum, the design ideas of combining the impact extrusion drilling and drilling with casing were proposed to complete the structure design of impact extrusion drilling tool with casing. By the finite element analysis software, the simulation analysis on the drilling conditions was made; the calculation results can be instructive to the design and optimization of drilling tools and can be the theoretical basis for the rationality of design of DTH hammer drilling tool structure.

Abstract:According to the characteristics of coalfield geology exploratory borehole, ZY-89 drill gas pressure measuring apparatus is developed. The paper introduces the apparatus about its working principles, structure and technical features, as well as its application in Guxu coalmine of Sichuan.

Abstract:This paper introduces a data acquisition system for continuous angle measurement based on double conductive plastic sensor, and its angular resolution is up to 0.1°in theory. The system is mainly composed of a low power MCU, 0-power consumption serial circuit and display part. Single chips control the inner ADC12 module for data acquisition, then enter into low-power sleep state and can be awakened by timer interruption. By the dual-channel data acquisition with double conductive plastic sensor and the algorithm design, the large size, heavy weight and high demand of dustproof and electromagnetic environment of traditional photoelectric encoder are avoided, and 0 ° ~360 ° continuous angle measurement is realized, which could not be done by the traditional conductive plastic sensor. This system has the characteristics of high accuracy, low power consumption, small size and strong extensibility, which has important application value in angular displacement measurement for industrial control, intelligent robots and condition monitoring.

Abstract:Coring and keeping the stability hole wall in complex formation are technical difficulties in geological drilling circles. In Wenchuan Earthquake Fault Scientific Drilling (WFSD), 5 boreholes were in the fault zone and the formation was extremely broken and soft. A new type of stepped bottom jetting anti-erosion core bit was designed, numerical analysis was made on bottom flow field by CFD technology to optimize drainage groove structure, mud properties and hydraulic parameters in order to fine the best combination to lay foundations for core recovery rate improvement, core blockage prevention and higher hole wall stability.

Abstract:This paper discussed the simulation which is on the basis of the CFD software, including 3 different temperatures and 2 different heating rates; and analyzed the distribution of the temperature field during the hot pressing sintering for bit. The simulation shows that the sintering temperature, heating rate and holding time have effect on the temperature distribution. The temperature differences between graphite mould and bit matrix rises when the sintering temperature rises. Within certain limits, the temperature difference will reduce as heating rate increases. As a result, the holding time should be considered based on the mould thickness, bit specifications and mould formula.

Abstract:Diamond is the main drilling and cutting elements of electroplated bit, its properties have direct impacts on the working efficiency and the service life of drill bit. The full understanding of diamond properties and all kinds of detection means are necessary for reasonably selecting the diamond with high performance-price ratio to satisfy the requirements of bits. The paper mainly introduces the diamond properties, the detection means and how to select diamond.