Zobrazeno 1 - 10
of 111
pro vyhledávání: '"directional hydraulic fracturing"'
Publikováno v:
矿业科学学报, Vol 9, Iss 5, Pp 687-697 (2024)
This study aims to investigate the crack propagation mechanism of directional hydraulic fracturing of coal mine roof and explore the relationship between fracture criteria. By drawing on fracture mechanics, we propose a hydraulic fracturing mechanica
Externí odkaz:
https://doaj.org/article/a000ac1cad114284bc693e9088d6fe1a
Publikováno v:
Petroleum, Vol 9, Iss 4, Pp 592-606 (2023)
Hydraulic fracturing (HF) technology can safely and efficiently increase the permeability of coal seam, which is conducive to CBM exploration and prevent coal and gas outburst. However, conventional HF fractures tend to expand in the direction of max
Externí odkaz:
https://doaj.org/article/669b84b8065342ea91ef32b4672a7fe3
Publikováno v:
Applied Sciences, Vol 14, Iss 19, p 8733 (2024)
In coal seam groups where the spacing between the upper and lower seams is small, the lower seam working face is significantly influenced by residual coal pillars from the upper seam and the void spaces created during mining. This presents considerab
Externí odkaz:
https://doaj.org/article/f4cdda26d0c6430aa6a774127cde787c
Publikováno v:
Heliyon, Vol 9, Iss 7, Pp e17638- (2023)
Directional hydraulic fracturing (DHF) is more and more widely used in coal mines in China for hard roof and coal burst control. The key to this technology is to determine the crack initiation pressure that affected by the shape of the artificial not
Externí odkaz:
https://doaj.org/article/20a82841cf5948e0a8a7b0b9a14ee32f
Publikováno v:
Applied Sciences, Vol 14, Iss 5, p 2047 (2024)
Directional hydraulic fracturing (DHF) is popular with hydraulic fracturing operations in coal mining to create cave-hard roofs, in which radial initial notches are created around open borehole walls before injecting high-pressurized fluid. Despite e
Externí odkaz:
https://doaj.org/article/c853b9478b1943afab3a2bbafde33f7b
Akademický článek
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Akademický článek
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Publikováno v:
Meikuang Anquan, Vol 53, Iss 4, Pp 62-67 (2022)
In order to study the influence of filtration on rock directional hydraulic fracturing under different filtration surfaces, 300 mm×300 mm×300 mm sandstone specimens with intermediate drilling holes and directional prefabricated fractures were selec
Externí odkaz:
https://doaj.org/article/23eec8853ef04859b4acef0527684490
Autor:
WU Jianxing
Publikováno v:
Meikuang Anquan, Vol 52, Iss 5, Pp 112-119 (2021)
Due to the influence of many disturbances in the process of retaining the roadway outside the double U layout working face, taking 2502 working face of Zhangcun Coal Mine of Lu’an Group as the engineering background, the field tests of directional
Externí odkaz:
https://doaj.org/article/24dd015dacc14a6ca78aba0ece40217b
Publikováno v:
Gong-kuang zidonghua, Vol 45, Iss 10, Pp 74-79 (2019)
Stress of upper coal pillar is the force source of strong deformation of retaining roadway. For surrounding rock control of retaining roadway with serious deformation, traditional blasting pressure relief technology has some problems such as high saf
Externí odkaz:
https://doaj.org/article/d88ab84e75894dd3b27d7a1f5e1cc504