... equivalent mechanical parameters using multi-monitoring data and an intelligent algorithm at phase i opening of cavern. Then, the reliability of these identified parameters are validated at phase i + 1 opening of cavern. The equivalent mechanical parameters are achieved after several excavation phases...

... Abstract Muzhailing railway tunnel is excavated mainly in fault zones, carbonaceous slate and sandstone using the drilling-blasting method. Geotechnical problems encountered in the tunnel during construction, such as large squeezing deformation with long duration and collapse of arch crown...

...-buried tunnels in Jinping II Hydropower Station are characterized by great depth, long length, large size in diameter and high geo-stress. During the excavation, by drilling and blasting method, of these tunnels, lots of the time-delayed rockbursts occurred; and blasting disturbance was one of triggering...

... Abstract Analytical solutions are often not available due to the complexity of engineering conditions. Circular tunnels are special cases which have analytical solutions and can be used for preliminary analysis of underground excavations and to guide the design. It is more logical to regard...

... is modeled. After excavation, the right slope has the contrary dip to faults but on the left slope the dip is similar to faults. Valley side slope presents tensile stress and the valley floor presents compressive stress. During valley incision the right slope display tensile stress state and its stress...

...Rock Characterisation, Modelling and Engineering Design Methods Feng, Hudson & Tan (Eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00057-5 Numerical analysis of stability of underground excavation using stress release method H.Z. Li Department of Civil Engineering, Xi an Jiaotong...

... the ground and specify an appropriate tunnelling method (excavation and support type) for the expected ground behaviour. The Austrian Society for Geomechanics pub- lished a guideline (OeGG 2010) with the aim of providing the engineers a general concept for the geomechanical design of underground structures...

... Qingdao geotechnical investigation and surveying institute, Qingdao, China ABSTRACT: Underground storage is the future oil and gas storage technic. The stability of LPG storage caves and support optimization is the content of this paper. First, on the base of excavation monitoring data of cave...

... University, Wuhan, Hubei, China Xingli Lu State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei, China ABSTRACT: Due to the stress redistribution after excavation, the pre-existent joints or cracks will deform...

... of underground constructions. It is a sudden manifestation of the release of strain energy stored in the rock mass. At present, there is no universally accepted method for predicting and preventing of the rock burst. Rock bursts is one of the disasters can occur in deep mining and rock excavation. It is a kind...

... Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei, China ABSTRACT: In order to research microseismic (MS) activity rules in the process of rockburst in deep tunnel, the immediate rockburst induced by TBM and D&B excavation are measured in the field. The attention law...

... Downstream Oil & Gas geotechnical performance coefficient Reservoir Characterization relation numerical simulation Upstream Oil & Gas cavern stability storage cavern pillar finite element analysis excavation groundwater inflow rock mass representative case natural gas...

... Abstract Basing on Huolangyu tunnel, the authors use the finite software MADIS-GTS to analyze stress field, displacement field, and plastic zone distribution of the surrounding rock under tunnel entrance excavation. They also study stress distribution rules of unsymmetrical pressure section...

... Abstract Apart from the design methodology required for excavation and support, common for all types of tunnels, the specific methodology for design of water pressure tunnels is presented. From definition of the objectives of the design, the necessary data to obtain from investigations...

... loading to fulfill visual excavation to the slope at random depth. Before constructing 3D model, searching of scientific model materials had been done. The simulation experiments were instrumented with acoustic emission (AE) censors, and monitored by crack optical acquirement (COA), ground penetrating...

... makes use of optical fibers as the light propagation medium, it could keep on visualizing the displacement of measuring points even if its front part is cut as needed during excavation. The paper presents some laboratory experiments to demonstrate the applicability of this scheme. By doing...

...Rock Characterisation, Modelling and Engineering Design Methods Feng, Hudson & Tan (Eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00057-5 Security risk assessment of rockburst in the process of tunnel excavation by drilling and blasting method in deep-buried hard rock G.F. Liu, X.T...

... Abstract Based on a three-dimensional non-linear constitutive model, this study investigates the anisotropic deformation of a tunnel excavated in jointed rock masses and associate supporting effects of rockbolts. Using a numerical model capable of describing the influence of mechanical...

... analysis method information evolutionary algorithm Engineering recognition Upstream Oil & Gas Rock mechanics application IRM intelligent rock mechanics Hudson rock engineering mechanics intelligent analysis method China engineering problem excavation model structure Rock...

... mechanics geostress tensile deformation Thickness zonal disintegration phenomenon rock mass tunnel mechanism excavation deep rock mass ISRM-Sponsored International Symposium on Rock Mechanics: Rock Characterisation, Modelling and Engineering Design Methods Recent Advances in the Zonal...