Results 81 to 90 of about 34,203 (251)
Performance of shallow anchor in ice-rich silt [PDF]
, 2014 Thesis (M.S.) University of Alaska Fairbanks, 2014Shallow anchor systems have been widely used for decades due to their time and cost efficiency. Yet when it comes to cold regions like Alaska, new challenges caused by the harsh environment need to be ...
Lin, Chuang, 林闯
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Results of monitoring at the British library excavation [PDF]
, 2014 The main phase of excavation for the basements of the British Library at St Pancras, London, was completed in 1987. The project included basements extending up to 25 m deep, through the London Clay and into the Lambeth Group. The excavations were formed
Simpson, Brian, Vardanega, Paul J.
core +2 more sources
Deep Underground Science and Engineering, EarlyView.Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu +4 more
wiley +1 more source
Profiles of Problematic Soils and Spatial Distribution: Implication on Foundation Construction in Parts of Kosofe Lagos, Southwestern Nigeria. [PDF]
, 2018 Geotechnical data were complemented with geophysical investigation and employed to delineate problematic soils in parts of Kosofe Lagos, Southwestern Nigeria.
Bayewu, Olateju O. +3 more
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Seismic Design of Concrete Dams: An Integrated Risk‐Informed Performance‐Based (RIPB) Framework
Earthquake Engineering &Structural Dynamics, EarlyView.ABSTRACT This paper advances the integration of risk‐informed principles into the seismic design of dams—a domain long guided by standards‐based, largely deterministic approaches. While performance‐based earthquake engineering is well established for buildings and bridges, its systematic adoption in dam engineering remains limited. We first address two
M. Amin Hariri‐Ardebili, Larry K. Nuss
wiley +1 more source
Study on Key Controlling Factors of Fracture Propagation by Shaped Charge Blasting in Coal Seams
Energy Science &Engineering, EarlyView.Gas drainage is the fundamental approach to controlling gas disasters in coal mines. For single low‐permeability coal seams, it should be supplemented by coal seam permeability enhancement technologies to improve gas drainage efficiency. This paper conducted a numerical simulation study on the key controlling factors affecting the fracturing effect of ...
Xin Yang +4 more
wiley +1 more source
Research on stability mechanism of roadway roof under dynamic loading induced by blasting excavation
Meikuang AnquanAddressing the stability issues of the immediate roof in roadways caused by subsidence and vibration during blasting excavation, this study takes the high-level drainage roadway of Panel 3203 in Wangpo Coal Mine as the engineering background.
Xiao LIU
doaj +1 more source
Rugged, low-conductance, heat-flow probe [PDF]
, 1970 Lightweight, compact probe structure has low thermal conductance to enable accurate measurement of slight temperature gradients. Probe combines ruggedness, high precision, accuracy, and stability.
Boudreau, E. J. +3 more
core +1 more source
Research on the Mechanism of Sand Bridge Stuck Drill in Deep Coal and Rock Gas Horizontal Wells
Energy Science &Engineering, EarlyView.Accounting for wellbore collapse debris and the bulldozer effect, this study develops models for permeable and impermeable sand bridge sticking in deep CBM horizontal wells, deriving resistance and volume formulations. Validated in Changqing, results show impermeable bridges dominate; controls (fluid optimization, staged drilling, circulation, speed ...
Cheng Hui +7 more
wiley +1 more source
Petroleum Exploration and Development, 2014 In view of borehole collapse in testing of horizontal wells, a calculation model for borehole collapse volume of horizontal open-hole in multiple-weak-plane formation was set up to analyze the factors affecting collapse volume.
Zhiyuan LIU +5 more
doaj +1 more source