Results 61 to 70 of about 1,645,202 (341)

Numerical simulation and engineering application of comb-shaped directional long borehole hydraulic fracturing under different arrangement of holes

Meikuang Anquan, 2021
In order to avoid the blindness of the hydraulic fracturing of the directional long borehole in coal mine 2130 of Xinjiang Coking Coal Group, and to accurately grasp the extension and expansion of hydraulic fracturing under different hole layout methods,
LI Wen, WANG Guanghong, OU Cong, LI Shourui, LI Xiangwang, ZHAO Huajun, LIU Jianhua, ZHAO Bi
doaj   +1 more source

Compatibility of Methacrylate Based Resins Controls Interfacial Failure and Toughness in 3D‐Printed Multimaterial Composites

Advanced Engineering Materials, EarlyView.
This work shows that the mechanical performance of multimaterial digital light processing (DLP) printed thermoset composites is governed by resin compatibility and interfacial design rather than spatial patterning alone. Brittle and ductile resin combinations produced premature interfacial failure, while graded interfaces and mechanically compatible ...
Ahmed M. H. Ibrahim, Li Meng, Ahmad R. Najafi, Nicolas J. Alvarez   +3 more
wiley   +1 more source

Experimental study on propagation of hydraulic fracture in volcanic rocks using industrial CT technology

Petroleum Exploration and Development, 2013
To understand the planar and three-dimensional geometry of hydraulic fractures in volcanic rocks, a hydraulic fracturing simulation experiment was conducted using the large-scale triaxial hydraulic fracturing test system in laboratory.
Lichun JIA, Mian CHEN, Liangtian SUN, Zhiyu SUN, Wei ZHANG, Qianqian ZHU, Zhen SUN, Yan JIN   +7 more
doaj   +1 more source

Influence of Si Content and Milling Duration on the Microstructure and Mechanical–Tribological Properties of AlCoCrFeNiSi High‐Entropy Alloys

Advanced Engineering Materials, EarlyView.
Si‐doped AlCoCrFeNi high‐entropy alloys are synthesized by mechanical alloying to reveal the effect of Si content and milling time on phase evolution, microstructural refinement, and tribological behavior. A transition from FCC to BCC structure, significant grain refinement, and enhanced hardness and wear resistance are achieved, with the 4 at% Si ...
Mustafa Okumuş, Mehmet Emin Demir, Sercan Özpınar   +2 more
wiley   +1 more source

Study on variation law of coal disturbance stress in hydraulic fracturing test

Meikuang Anquan, 2023
In order to explore the variation of disturbance stress in the coal seam around the fracturing borehole in the process of hydraulic fracturing, taking the 1703 coal face of Junlian Jinzhong Coal Mine Company as the test site, on the basis of determining
CHEN Kai, ZHANG Dongming, REN Fake
doaj   +1 more source

The role of aseismic slip in hydraulic fracturing–induced seismicity

Science Advances, 2019
Hydraulic fracturing accelerates fault creep in stable formations, loading unstable fault regions, resulting in dynamic rupture. Models for hydraulic fracturing–induced earthquakes in shales typically ascribe fault activation to elevated pore pressure or
T. Eyre, D. Eaton, D. Garagash, M. Zecevic, M. Venieri, Ronald Weir, D. Lawton   +6 more
semanticscholar   +1 more source

Multimodal Soft Surgical Robots Enabled by Eco‐Degradable, Sterilizable Polymers and Transient Electronics

Advanced Functional Materials, EarlyView.
A compostable PGS soft surgical robot with interchangeable modules integrates transient Mo tactile and Si thermal sensors for dual feedback. The device preserves its function after clinical‐grade sterilization, demonstrates stable actuation and cardiac tissue grasping with real‐time in vivo pulsatile monitoring, and biodegrades post‐use with soil‐safe, 
Minseong Chae, Kyung‐Sub Kim, Gyeong‐Seok Hwang, Jun‐Seok Shim, Sung‐Woo Kim, Yong‐Wu Kim, Jieun Han, Jae‐Young Bae, Jae‐Hwan Lee, Minjung Chae, Jooik Jeon, Joo‐Hyeon Park, You‐Jung Park, Ju‐Yong Lee, Sung‐Geun Choi, Min‐Ha Oh, Yong‐Joong Shin, Young‐In Ryu, Ji‐Woo Gu, Seong‐Yu Choi, Jeong‐Yun Sun, Jung Keun Hyun, Myoung‐Ryul Ok, Sang Yup Kim, Edyta Wyszkowska, Ju‐Young Kim, Kang‐Sik Lee, Seung‐Kyun Kang   +27 more
wiley   +1 more source

A coupled simulation method of hydraulic fracturing for relieving mining pressure under hard roof based on DEM method

Meitan xuebao
The technology of pressure relief through hydraulic fracturing method in hard roof has successfully addressed the disaster risk caused by the difficult caving of thick-hard roof strata in coal mines.
Hongwei ZHANG, Chuanhong ZHOU, Jie HE, Qingshuai YANG, Zhiwei YE, Shixiong ZHANG, Xusheng RUI, Lingye ZHAN, Bohan REN   +8 more
doaj   +1 more source

Mechanism of Coal Seam Permeability Enhancement and Gas Outburst Prevention under Hydraulic Fracturing Technology

Geofluids, 2022
In view of the high gas pressure and low permeability of deep coal seam, it is difficult to control gas, which affects the safety production of coal mine.
Xinhua Wu, Tao Zhu, Yufei Liu, Guoyu Zhang, Guanghui Zheng, Fengnian Wang   +5 more
doaj   +1 more source

Numerical simulation of hydraulic fracture propagation in fractured reservoir using global cohesive zone method

Frontiers in Physics, 2023
Natural fractures in reservoirs have a significant influence on hydraulic fracturing propagation. However, existing analyses have neglected the effect of natural fracture deformation parameters, including crack normal stiffness and shear stiffness on ...
Xiaotian Song, Hongyan Liu, Xiuhua Zheng
doaj   +1 more source