Results 41 to 50 of about 15,750 (147)

Design of Diamond Bits Water Passage System and Simulation of Bottom Hole Fluid Are Applied to Seafloor Drill

Journal of Marine Science and Engineering, 2021
The performance of the diamond bit directly affects the drilling efficiency of the seafloor drill. The drill bits used in land drilling are prone to abnormal wear, low coring efficiency, and large sample disturbance in marine exploration.
Jialiang Wang, Dilei Qian, Yang Sun, Fenfei Peng   +3 more
doaj   +1 more source

An advanced hydraulic fracturing technique: Pressure propagation and attenuation mechanism of step rectangular pulse hydraulic fracturing

Energy Science & Engineering, 2023
Hydraulic fracturing technology has played a pivotal role as a key technology in shale gas development, but the geological environmental problems caused have been worrying the public.
Pei He, Zhaohui Lu, Zhi Deng, Yongkui Huang, Dawei Qin, Liming Ouyang, Menglai Li   +6 more
doaj   +1 more source

Multi-Scale Feature Analysis Method for Soil Heavy Metal Based on Two-Dimensional Empirical Mode Decomposition: An Example of Arsenic

Applied Sciences
The spatial distribution of soil heavy metals was influenced by both natural and anthropogenic factors, and the multi-scale characteristics of heavy metals played a key role in analyzing their influencing factors.
Maowei Yang, Lin Ge, Chaofeng Yao, Jinjie Zhu, Wenqiang Wang, Qingwei Ma, Chang-En Guo, Qiangqiang Sun, Shiwei Dong   +8 more
doaj   +1 more source

Organic Geochemical Characteristics of the Shale from Y1 Well in Chengkou Area of Northeastern Chongqing and Exploration Prospects

Yankuang ceshi, 2018
A study has been conducted based on the drilling data and geochemical data from the Y1 Well in Chengkou of Northeastern Chongqing, including total organic carbon (TOC), kerogen microcomponent, equivalent vitrinite reflectance (Ro) and carbon isotope ...
HE Ting-peng, LUAN Jin-hua, HU Ke, LI Tian, YANG Liu, ZHANG Yue-lei   +5 more
doaj   +1 more source

Optimization of ecological and efficient restoration technology for green mines based on hesitant fuzzy TOPSIS

Scientific Reports
The geological conditions of mines are complex and diverse, and existing restoration methods may not be sufficient to meet the requirements for all types of mine rehabilitation. A study on the optimization of ecological restoration technologies for green
Bin Wang, Daoran Guo, Jing Sun, Jian Guo, Shangrong Gao, Wanli Lu   +5 more
doaj   +1 more source

Characterization of stability and support force of loess caves in northwest China

Heliyon
Numerous manually excavated loess caves are present within a cultural relic protection zone in the northwestern region of China. The collapse of these caves frequently leads to the cracking, tilting, and even collapse of ancient buildings above, posing a
Dongqiao Shao, Wenlun Zhang, Zhiming You
doaj   +1 more source

Application and effectiveness of high-density electrical method in the karst ground subsidence zone of Laiwu

Carsologica Sinica
Frequent karst subsidence in China’s carbonate regions poses a significant geological hazard that requires urgent attention. This issue often arises from excessive groundwater extraction for domestic, irrigation, industrial, and mining purposes, inducing
Hongjie SUN, Zhihui WANG, Zhenhua ZHAO, Zhenjiang LUO   +3 more
doaj   +1 more source

Geochemical and geophysical relationship of the potassium-rich fenite zone in surface and subsurface investigations of the giant Kuluncak (Malatya) Nb-U-REE-Zr-Li mineralization

Bulletin of the Mineral Research and Exploration
The Kuluncak (Malatya) district hosts one of the most significant Nb–U–REE–Zr–Li mineralizations in Türkiye, spatially associated with alkaline and carbonatite-related rocks.
Okan Pulat, Murat Kirtil, Mustafa Karakaş, Mustafa Küçük, Ahmet Mert Ulutaş, Murat Akgöz, Ali Tugcan Unluer, Mehmet Burak Omaç, Özkan Türkan, Hülya Ateş   +9 more
doaj   +1 more source

Palaeozoic-Recent geological development and uplift of the Amanos Mountains (S Turkey) in the critically located northwesternmost corner of the Arabian continent

Geodinamica Acta, 2017
We have carried out a several-year-long study of the Amanos Mountains, on the basis of which we present new sedimentary and structural evidence, which we combine with existing data, to produce the first comprehensive synthesis in the regional geological ...
Tamer Y. Duman, Alastair H. F. Robertson, Hasan Elmacı, Meryem Kara   +3 more
doaj   +1 more source

Creep Instability and Acoustic Emission Responses of Bedded Coal Subjected to Compressive Loads and Acidic Water Saturation

Applied Sciences
This study investigates the creep behavior and acoustic emission (AE) characteristics of bedded coal samples under acidic water environments. Uniaxial graded creep tests coupled with AE monitoring were conducted on samples with bedding angles of 0°, 30°,
Zhenhua Zhao, Lin Han, Hongjie Sun, Hongtao Li, Rui Zhang, Xinyu Bai, Yu Wang   +6 more
doaj   +1 more source