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Guo P.,China University of Mining and Technology | Guo P.,State Key Laboratory of Deep Geomechanics and Underground Engineering | Li W.-C.,China Institute of Water Resources and Hydropower Research
Procedia Engineering

The software package of GeoStudio, which is developed and supported by GEOSLOPE inc., is one of the most popular software package in the field of geotechnical engineering. However, the software SIGMA/W for deformation and stresses computing currently absents Duncan-Chang E-B constitutive model that has been widely used in the domestic field of geotechnical engineering. The shortage limits the software's application scopes. In this paper, with the further developing platform, Duncan- Chang E-B constitutive model is developed in GeoStudio2007 with C# environment, and the stress level, which is often used in the result analysis, is connected to the post processor. Through a series of numerical simulation of routine and stress path triaxial compression test, the correctness of the compiled model is verified. Through a stress level computing of a stage constructed dam, the goodness of connection between the model and the post processor is verified. According to the experience of developing Duncan-Chang E-B constitutive model, this paper shows the basic procedures, programming essential and connecting with post processor for constitutive model developing in GeoStudio2007, and this supplies a reference for other developers to build a user-defined constitutive model. © 2011 Published by Elsevier Ltd. Source

Yang X.,State Key Laboratory of Deep Geomechanics and Underground Engineering | Yang X.,China University of Mining and Technology | Wang F.,State Key Laboratory of Deep Geomechanics and Underground Engineering | Wang F.,China University of Mining and Technology | And 8 more authors.
Rock Stress and Earthquakes - Proceedings of the 5th International Symposium on In-Situ Rock Stress

Floor heave is one of the most difficult problems of soft rock roadway supporting in coal mines.A serious floor heave have occurredwhen thewest wing track roadway ofTingnan coal minewas being constructed, the maximum value reached to 50 cm, which impacted the normal application of roadway severely. The article involved engineering geology, soft rock engineering mechanics and clay mineralogy etc, employed the ways of study on engineering geomechanics, laboratory testing on properties of rock mass, and combined with FDM 3D numerical simulation, and deeply researched the deformation mechanism and generating process of floor heave, it indicated clearly that the major influencing factor that led to floor heave was the horizontal extrusion stress, and the secondary ones were floor surrounding rock with high content of swelling clay minerals and soaking effect on floor rock. Thus the deformation mechanismwas compound type of floor heave caused by the combined action of plastic extrusion and swelling. Aimed at the above-mentioned mechanism, a new support measures would be provided with inverted arch and floor bolt to control the floor heave. Project protice has shown good results of new supporting have been obtained with expected effects, and controlled the floor heave effectively. © 2010 Taylor & Francis Group, London. Source

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