Results 31 to 40 of about 61,837 (250)

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

Local mineral dust transported by varying wind intensities forms the main substrate for loess in Kashmir [PDF]

Eiszeitalter und Gegenwart, 2021
C. Zeeden, J. A. Mir, M. Vinnepand, C. Laag, C. Laag, C. Rolf, R. A. Dar   +6 more
doaj   +1 more source

Anisotropic Borehole Stress Program

, 2019
Software developed to calculate the stress concentrations in the vicinity of a borehole drilled at an arbitrary direction through an elastically anisotropic rock formation. The code developed is based on the Lekhnitskij-Amadei solution.
Wei Li, Maria Tibbo, Douglas R. Schmitt
core   +1 more source

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

Deep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand, Ang Li, Wenbo Huang, Juanwen Chen, Qingshan Ma, Fangming Jiang   +5 more
wiley   +1 more source

Using sectional blasting to improve the efficiency of making cut cavities in underground mine workings

Frontiers in Earth Science
Introduction: The research concerns how making cut cavities improves drilling and blasting operations as well as the optimum parameters to arrange both snubber and auxiliary blastholes.Methods: The research methods include experimental and industrial ...
Vasyl Lozynskyi, Vasyl Lozynskyi, Khalidilla Yussupov, Kanay Rysbekov, Serikbay Rustemov, Oleg Bazaluk   +5 more
doaj   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source

Temporal variability of water chemistry in the Cherkashinskaya well No. 36-RG (Tobolsk district, Tyumen region)

Известия высших учебных заведений: Нефть и газ
This article focuses on a temporary change in the chemical composition of water in the Cherkashinskaya well No. 36-RG, which is located in the Tobolsk district near the village of Shestakovo.
A. S. Aleksandrov, V. A. Beshentsev, A. S. Alzhanova   +2 more
doaj   +1 more source

Determination of stress state in deep subsea formation by combination of hydraulic fracturing in situ test and core analysis: A case study in the IODP Expedition 319

, 2013
[1] In situ test of hydraulic fracturing (HF) provides the only way to observe in situ stress magnitudes directly. The maximum and minimum horizontal stresses, SHmax and Shmin, are determined from critical borehole pressures, i.e., the reopening pressure
Ito, Takatoshi, David F. Boutt, Ito, Hisao, Byrne, Timothy, Takatoshi Ito, Doan, Mai-Linh, Funato, Akio, Yasuyuki Kano, Lisa C. McNeill, Mai‐Linh Doan, Demian Saffer, McNeill, Lisa C., Saffer, Demian, Timothy Byrne, Lin, Weiren, Boutt, David F., Kano, Yasuyuki, Moe, Kyaw Thu, Kyaw Thu Moe, Akio Funato, Hisao Ito, Weiren Lin   +21 more
core   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Temperature regime of upper layer of the glacier East Grönfjordbreen (West Svalbard)

Лëд и снег, 2015
Data of thermometry performed in boreholes of the glacier East Grönfjordbreen situated in West Svalbard are presented. The measurements were made within the ice upper layer down to 20 m in spring and summer of 2012–2014.
R. A. Chernov, T. V. Vasilyeva, A. V. Kudikov   +2 more
doaj   +1 more source