Results 171 to 180 of about 86,679 (309)

Subsurface microbiology and the pressing societal need to support future exploration. [PDF]

FEMS Microbiol Ecol
Sheik CS, Steen AD, Reese BK, Wang DT, Osburn MR, Cantner KA, Kieft TL, Colwell FS, Spear JR, Toner BM.   +9 more
europepmc   +1 more source

Random finite element analysis on ground subsidence caused by tunnel excavation in karst regions with spatial variable soil

Deep Underground Science and Engineering, EarlyView.
This study investigates ground subsidence during tunnel excavation in karst areas, highlighting the combined effects of karst cave proximity, cave size, and soil spatial variability. Findings suggest that shorter cave distances and larger cave sizes increase subsidence variability, and a modified Peck formula is proposed for more accurate subsidence ...
Zhenghong Su, Yong Fu, Miaomiao Sun, Kailin Ding, Ying Zhao   +4 more
wiley   +1 more source

Machine learning-based paleobathymetric reconstructions using archaeal lipid biomarkers. [PDF]

Sci Adv
Zhou J, Kang D, Chen S, Dong L.
europepmc   +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

Integration of ERT and Geotechnical Investigation for River Restoration: A Case Study of Dam Removal Site Characterization. [PDF]

Environ Manage
Rahimi M, Wood CM, Befus KM, Holt JJ, Thompson G, Fathizadeh M.   +5 more
europepmc   +1 more source

Semi‐analytical solution for the stability of deep vertical shaft considering time‐dependent rock‐structure interaction

Deep Underground Science and Engineering, EarlyView.
A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen, Pinqiang Mo, Zhao Lu, Lianfei Kuang, Qiang Zhang, Abolfazl Eslami   +5 more
wiley   +1 more source

Ground penetrating radar observations of ancient large-scale deltaic structures in Jezero crater, Mars. [PDF]

Sci Adv
Cardarelli EL, Árting U, Paige DA, Hamran SE, Russell P, Andersson F, Broz A, Caravaca G, Horgan B, Berger T, Brovoll S.   +10 more
europepmc   +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

The impact of forced closure on proppant distribution of hydraulic fracturing in shale formations

Deep Underground Science and Engineering, EarlyView.
Research findings demonstrate that implementing forced closure within shale formations can remarkably mitigate proppant settlement, concurrently increasing the effective propped surface area from 29.74% to 38.68%. Abstract Forced closure is widely used in conventional oil and gas reservoirs to promote uniform proppant placement.
Tongxuan Gu, Hanyi Wang, Quan Gan, Shuang Zheng   +3 more
wiley   +1 more source

35 metagenomic datasets from the northern and southern parts of the Yap trench sediments. [PDF]

Sci Data
Niu M, Fu L, Yan Q, He Z, Li D, Zhen Y, Wang M, Li C.   +7 more
europepmc   +1 more source