Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Changbao Jiang"'
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 5, Pp 25-35 (2024)
The key to gas drainage in goaf is to understand the evolution process of overlying strata fissures on working face. In order to study the evolution law of mining-induced compaction area of overburden rock in fully mechanized mining face and efficien
Externí odkaz:
https://doaj.org/article/8d26428cbd0c4baea4bb1bf15798ba37
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 5, Pp 92-101 (2024)
Hydraulic fracturing is one of the effective methods to improve the extraction efficiency and gas production of low-permeability coal seams with high gas content. Due to the existence of abundant natural fractures in the coal seam, the interaction be
Externí odkaz:
https://doaj.org/article/5b932d7fed5b4712938d1a51c01a1fa5
Publikováno v:
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Vol 10, Iss 1, Pp 1-19 (2024)
Abstract The methane in the coal seams of abandoned mines is a valuable natural gas resource. However, the ultra-low permeability of coal seams restricts the extraction of coalbed methane. The liquid nitrogen fracturing technology is a novel approach
Externí odkaz:
https://doaj.org/article/ed5d3602268348dcb2aa100c8602ed67
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 3, Pp 63-73 (2024)
In order to study the fiber optical strain characterization method of the overlying rock structure during mining in a certain mine in northern Shannxi, based on the engineering geological conditions of 12217 working face in Buertai Mine, the strain m
Externí odkaz:
https://doaj.org/article/953ee6bc697e4b8fa9ee47b0dd1d4c41
Publikováno v:
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Vol 10, Iss 1, Pp 1-15 (2024)
Abstract Roadway support can effectively improve the stability of roadway excavation and ensure the safety of underground mining. This study investigates the secondary support time and parameter optimization of combined support for a deep roadway in
Externí odkaz:
https://doaj.org/article/e30f43381faa463288133dda987e0cbf
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 6, Pp 62-71 (2023)
The accurate characterization of coal fracture network can effectively evaluate the fracturing effect of the deep coal seam after hydraulic fracturing. In order to quantitatively evaluate the complexity of coal seam after hydraulic fracturing, the hy
Externí odkaz:
https://doaj.org/article/1a225a574b5f40c3afb9730a164f772d
Publikováno v:
Geomatics, Natural Hazards & Risk, Vol 14, Iss 1 (2023)
AbstractBased on the true triaxial dynamic anisotropic permeability model of coal and rock, a multi field coupling mathematical model of structurally anisotropic coal seams under true triaxial stress was established, and a numerical simulation experi
Externí odkaz:
https://doaj.org/article/40df3a9b98704994bee46f819b927b8d
Publikováno v:
Advances in Civil Engineering, Vol 2022 (2022)
The different damage variables equation based on strain, energy dissipation, acoustic emission (AE), and permeability characteristics under tiered cyclic loading were defined. The damage variables based on different characteristics were compared, ana
Externí odkaz:
https://doaj.org/article/a773c8c1805c42f688204662d3ded839
Publikováno v:
PLoS ONE, Vol 15, Iss 7, p e0236335 (2020)
To study the influence of cyclic stress on the nonlinear behavior of saturated sandstone, the residual strain properties and energy dissipation characteristics of the sandstone under tiered cyclic loading were experimentally investigated. The axial/r
Externí odkaz:
https://doaj.org/article/fe5795dacec746489fea01010c10a5dd
Publikováno v:
Royal Society Open Science, Vol 6, Iss 6 (2019)
Based on a self-developed triaxial seepage device, a new loading and unloading experimental method is proposed in this paper to eliminate sample variations. The results show that the strength of sandstone sample and the axial strain at failure increa
Externí odkaz:
https://doaj.org/article/61d766d645ed4b3aa861c120df5e4ee0