Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Quanle ZOU"'
Publikováno v:
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Vol 10, Iss 1, Pp 1-17 (2024)
Abstract After underground coal mining, rocks are often subjected to tensile damage by the interaction of dynamic and static loadings. The process of rock fracture development under dynamic and static loadings will be released in the form of acoustic
Externí odkaz:
https://doaj.org/article/a2de51bf05ea4b46af14f13d925a8f01
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 7, Pp 68-78 (2024)
With the accelerated development of surface well cementing technology, the engineering site has higher requirements for the early fluidity and coagulation performance of surface well cementing water slurry. In order to improve the top-off efficiency
Externí odkaz:
https://doaj.org/article/cdba7923667e4ade82272c92eaf39f45
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 4, Pp 177-192 (2024)
The three-field (stress, displacement and fracture field) evolution laws of the inclined coal seam group are complex, which are important for the transport and storage of pressure-relief gas. In order to investigate the three-field evolution law of i
Externí odkaz:
https://doaj.org/article/231ec479ccff4993992aee32ac48e647
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-12 (2024)
Abstract During the construction of coalbed methane extraction wells, cementing cement sheath is crucial for the stability and sealing of surface wells. One effective method to enhance these properties is the addition of lignosulfonate. However, the
Externí odkaz:
https://doaj.org/article/a7a0403bb4ab4d01ae03b9c1018f04b3
Publikováno v:
International Journal of Mining Science and Technology, Vol 33, Iss 12, Pp 1527-1540 (2023)
In coal mining, rock strata are fractured under cyclic loading and unloading to form fracture channels. Fracture channels are the main flow narrows for gas. Therefore, expounding the flow conductivity of fracture channels in rocks on fluids is signif
Externí odkaz:
https://doaj.org/article/212b1fcc52c34bdea13117b45210b83c
Publikováno v:
International Journal of Coal Science & Technology, Vol 10, Iss 1, Pp 1-18 (2023)
Abstract Gas drainage is an effective technology for gas control in coal mines. A high borehole-sealing quality is the fundamental precondition for efficient gas drainage. The expansibilities of cement pastes used in borehole-sealing processes are cr
Externí odkaz:
https://doaj.org/article/98bfda7cc2794b139a411dea132414f5
Joint ground and underground gas extraction mode and its key technology for outburst coal seam group
Publikováno v:
Meitan xuebao, Vol 48, Iss 10, Pp 3713-3730 (2023)
China’s coal seams are characterized by high ground stress, low permeability, high gas pressure, and high gas content, and their gas outburst hazards are serious. Therefore, some effective gas extraction measures must be taken for coal seams. Howev
Externí odkaz:
https://doaj.org/article/34d6e9784a404f8bbce568bf2572bd2d
Publikováno v:
Journal of Materials Research and Technology, Vol 25, Iss , Pp 4187-4200 (2023)
Drilling gas drainage boreholes in coal mines is a major measure to prevent gas disasters in coal mines. However, coal mining disruptions can affect the stability and shape of gas drainage boreholes. Therefore, multi-level cyclic loading and unloadin
Externí odkaz:
https://doaj.org/article/77475d52f5f14efe9ce078d906098f6c
Publikováno v:
Meitan xuebao, Vol 48, Iss 4, Pp 1606-1621 (2023)
In the coalbed methane extraction of surface wells in the mining area, the mining of coal seam in working face will cause a significant disturbance to overlying rock layer, which in turn will lead to the deformation and damage of surface wells. The c
Externí odkaz:
https://doaj.org/article/a003f10b134f4b969e3e6fa8effe0d83
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 4, Pp 47-55 (2023)
Surface wells are prone to deformation and even instability under the mining action caused by coal seam mining. This is also a key issue that restricts the application of gas drainage technology in surface wells in mining pressure relief areas. Based
Externí odkaz:
https://doaj.org/article/c5728ea3852f4967954c5c030ce33fc7