Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Qingliang Chang"'
Publikováno v:
International Journal of Mining Science and Technology, Vol 31, Iss 2, Pp 153-162 (2021)
In the loose and fractured coal seam with particularly low uniaxial compressive strength (UCS), driving a roadway is extremely difficult as roof falling and wall spalling occur frequently. To address this issue, the jet grouting (JG) technique (high-
Externí odkaz:
https://doaj.org/article/00cc093df09e4ce4b20138b0b80d5f8f
Publikováno v:
Lithosphere, Vol 2021, Iss Special 4 (2021)
AbstractUsing hydraulic fracturing for cutting roof pressure is a critical technology to protect coal pillars. In this paper, based on the engineering background of 18506 working face in the Xiqu Coal Mine, using the methods of theoretical analysis,
Externí odkaz:
https://doaj.org/article/751b7ef639e04d20b33a9eaf021424d7
Publikováno v:
Materials, Vol 15, Iss 17, p 5904 (2022)
Gangue paste material is mainly composed of coal gangue with particle size, which is mixed with cement. Fly ash and additives can be added to change its performance. In this paper, the influence of each component on the mechanical properties of gangu
Externí odkaz:
https://doaj.org/article/ea47c864169c4940866d0c4f3ae88e2f
Publikováno v:
Geofluids, Vol 2021 (2021)
Water inrush disasters are extremely prone to occur if the coal seam floor contains a confined aquifer. To find out the failure behavior of coal seam floor of paste filling working face, a beam-based theoretical model for the floor aquifuge was built
Externí odkaz:
https://doaj.org/article/164c0137a7e7407cbbd027aa5d6753be
Publikováno v:
Geofluids, Vol 2021 (2021)
Aiming at the problem of the safety mining problems of longwall paste filling working face under buildings on high confined water in the Daizhuang Coal Mine, the paste filling mining method was used. A series of theoretical analyses, numerical simula
Externí odkaz:
https://doaj.org/article/9b31dda2a3a740bea76caba407b5d277
Publikováno v:
Advances in Civil Engineering, Vol 2020 (2020)
Based on geological conditions of 3318 working face haulage roadway in Xuchang Coal Mine, as well as the space-time relationship with surrounding gob, theoretical analysis and numerical simulation were used to study the influence of fault structure o
Externí odkaz:
https://doaj.org/article/a55b846510684001a38227b0aab3f08d
Publikováno v:
International Journal of Mining Science and Technology, Vol 28, Iss 3, Pp 519-524 (2018)
To determine the filling body’s width along the gob-side remained roadway which is underneath the gob, the authors analyzed the interaction mechanism between the roof and the supporting body along the remained roadway, based on the elastic thin pla
Externí odkaz:
https://doaj.org/article/c4621b3415574d88b27e1b0cb8b3336f
Autor:
Qingliang Chang, Xingjie Yao, Qiang Leng, Hao Cheng, Fengfeng Wu, Huaqiang Zhou, Yuantian Sun
Publikováno v:
Applied Sciences, Vol 11, Iss 24, p 11717 (2021)
Filling mining plays an important role in controlling surface subsidence. To study the movement of overburdened rock in filling mining under thick loose layers, a numerical simulation combing field measurement in CT30101 working face in the Mahuangli
Externí odkaz:
https://doaj.org/article/3309b5760beb4dce811378b4d4166dc9
Autor:
Yuantian Sun, Ruiyang Bi, Qingliang Chang, Reza Taherdangkoo, Junfei Zhang, Junbo Sun, Jiandong Huang, Guichen Li
Publikováno v:
Applied Sciences, Vol 11, Iss 17, p 7953 (2021)
The roadway stability has been regarded as the main challenging issue for safety and productivity of deep underground coal mines, particularly where roadways are affected by coal mining activities. This study investigates the −740 m main roadway in
Externí odkaz:
https://doaj.org/article/c23a851034234b98ae5babfa67ac3c62
Publikováno v:
International Journal of Mining Science and Technology, Vol 23, Iss 3, Pp 323-328 (2013)
Comparing with the resin bolt, the hydraulic expansion bolt has different anchoring mechanism and application advantage. According to the working mechanism of the hydraulic expansion bolt, its anchoring force is expressed in four forms including supp
Externí odkaz:
https://doaj.org/article/d4dd7908a8e149c0a3f62cd19b01b2c1