... Abstract It is critical to obtain the rock strength along the wellbore to control drilling problems such as pipe sticking, tight hole, collapse and sand production. The purpose of this research is to predict the uniaxial compressive strength based on data of sonic travel time, formation...

...) and igneous rocks (granitoids and dolerite). A back propagation artificial neural network was developed and trained in order to predict UCS. The input parameters were unit weight γ, (Is ( 50 )), (σ t ), and lithology. The lithology was introduced in the neural network as a qualitative input parameter...

... much comparable to a coal mine situation. Taking this factor into consideration, the prediction of subsidence parameters has been carried out by adopting the well accepted and conventional coal mining subsidence prediction methods that have been developed in the country and are suitable for Indian...

... categories of igneous, metamorphic and sedimentary rocks were used. Imperial equations and prediction models were determined using regression analysis and neural networking, respectively. Finally, using the proposed equation, obtained values were classified along with the different classifications for rock...

... Abstract Anomalies in tunnel ahead cause various problems, such as ground settlement, sinkholes and groundwater inflow during tunneling. Therefore, the accuracy of predictions of the location and size of anomalies is essential for safe tunnel excavation processes. TEPS, known as a tunnel-ahead...

... opinions on the mechanism of different types of rockburst in the specific geological conditions in the Upper Silesian Coal Basin. Geomechanical methods comprising destress drilling, destress blasting and seams watering as well as geophysical methods of rockburst prediction and prevention are presented. All...

.... We have studied the effect of the fault zones on the measured 3D displacements, using the common evaluation and displacement prediction methodologies, and we show the results obtained during the control of the „normality" of the displacements from the underground spaces which were excavated full face...

... Abstract Blasting and the transmission of vibration involve numerous variables which makes it impossible to predict the levels of vibrations. Therefore an effective blast design and optimization require a multitude of variables be integrated into a single instance. In prior research...

... prediction footing collapse movement inclination angle weak plane bearing capacity geomaterial friction angle variation plane foundation rock mass shallow foundation anisotropy Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group...

... ABSTRACT: Explorative tunnels are one of the best ways to assess the rock quality in the preliminary stage of a long tunnel excavation project: this strategy allows predictions for evaluating, with good accuracy, methods, costs, and technical problems related to the excavation of the main...

... " prediction of geotechnical behaviour is difficult". However, it seems that there has never been a formal investigation of how the OM satisfies the LSD paradigm. As application of the OM is commonplace in rock engineering, we believe it is critical that this is done. Thus, this paper re-examines the OM...

... ABSTRACT: The rockburst hazard frequently occurs in the process of constructions with deeply buried rigid rock. It is a difficult problem that how to predict the occurrence and intensity of rockburst. General technologies often can not be competent because of the complex features of rockburst...

... ABSTRACT: With widespread applications of mechanized tunneling in almost all ground conditions, prediction of anticipated performance and production rate of tunnel boring machine (TBM) is essential part of planning, cost estimation, and selection of proper machine specification to achieve...

... the storage integrity of the reservoir. reservoir geomechanics injection pressure Upstream Oil & Gas co 2 Fracture Zone injection well Reservoir Characterization caprock prediction fracture fault zone In Salah fault fracture zone permeability injection uplift pattern uplift surface...

... softening behavior, with various stress states as determined from the overall 3D analysis. The results allow definite qualitative statements about the influence of the stress state 1 Introduction As the TBM performance prediction is used to make reliable cost and price estimates as well...

... Abstract This paper briefly describes an integrated approach to mine ground water simulation and prediction using an in-house finite element code called COSFLOW developed in CSIRO of Australia. COSFLOW uses a Cosserat continuum theory for the efficient description of load deformation behavior...

.... In this paper, after describing the fundamentals of each failure rule and the involved mechanical parameters, those are used to simulate triaxial laboratory tests of mica-schist samples. The obtained numerical predictions are compared to the experimental data. At last, uses are made to model the cavern...

... Abstract In deep tunnels the knowledge of in-situ rock temperatures is of great importance, e.g. for the design of ventilation and cooling. A finite element model simulation technique for rock temperature prediction is described. The method handles complex thermal/hydraulic characteristics...

... Abstract The reliable prediction of the service lifetime of tunnel constructions is of essential technical and economic interest. In this context polymers used for tunnel liners have to fulfill the requirement of 100 years lifetime. However, today no reliably proven test method is available...

... Abstract Tunnel boring is shown to be a suitable technique method in hard rock tunnelling. Performance, disc cutter consumption and therefore cost are strongly influenced when using Tunnel Boring Machines (TBMs) in hard rock conditions. Furthermore, good predictions of TBM performance and cost...