... to the ratio of in-situ stress which is about 1. The geological analysis and the numerical simulation show that the special rock mass with layered structure presents an appearance of heterogeneous condition which affects the redistribution of stress in tunnel and takes major responsibility for the large...

... wells were analyzed. Furthermore, the influence of drilling azimuth, in-situ stress value and formation strength on the fracture modes of horizontal wells was analyzed. The results show that: the possibility of tensile fracture is greater when drilling horizontal wells near the maximum horizontal stress...

... Oil & Gas design method in-situ stress steel lining water pressure watertight lining rock mass permeability Rock Characterisation, Modelling and Engineering Design Methods Feng, Hudson & Tan (Eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00057-5 Design methods for pressure...

... of the HF test is the wellbore pressure versus time that is used for estimating the in-situ stresses. A significant point in this curve, which is associated with the minimum horizontal in-situ stress, is the shut-in pressure. In this paper, a plane strain numerical model is used for simulating the injection...

... Characterization orientation fracture initiation rock medium in-situ stress reservoir geomechanics horizontal fracture stress state stress concentration horizontal principal stress hydraulic fracturing borehole hard roof stress distribution fracture Upstream Oil & Gas transverse borehole...

... Intelligence information numerical simulation deep rock core observation geomechanical property fracture in-situ stress horizontal drilling ISRM-Sponsored International Symposium on Rock Mechanics: Rock Characterisation, Modelling and Engineering Design Methods 1 INTRODUCTION The Williston Basin...

...% which may cause some risk in deep tunnel construction. In this paper we discuss how to use rock mechanic and construction experience from transportation tunnels of JP-II project to assess the applicability of hollow core bolts in deep hydropower tunnels. Firstly, in-situ stress along the tunnels...

... underground railway. Other than the rock material itself, the development of underground space also depends on a number of factors such as the weathering profile, the structural geology, the faults and the in-situ stress. The main faults in Hong Kong strike northeast varying to north-northeast, and northwest...