Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Liu, Ming"'
Publikováno v:
Meikuang Anquan, Vol 51, Iss 2, Pp 244-247 (2020)
In order to solve the problem that it is difficult to determine the safety evaluation grade of flying gangue damage in steeply dipping coal seam, a safety evaluation model of flying gangue in steeply dipping coal seam is established by using the meth
Externí odkaz:
https://doaj.org/article/2c43d4f38c8a4f4e9c1bf790d26a2763
Publikováno v:
Meikuang Anquan, Vol 53, Iss 11, Pp 63-69 (2022)
Grouting method is one of the commonly used methods for soft roadway reinforcement. Through the discrete element simulation method, the grouting process of coal seam was studied, and the grouting effect under different coal strength and grouting pres
Externí odkaz:
https://doaj.org/article/44723f6df3604e74b0c6244d3d97dfba
Publikováno v:
Gong-kuang zidonghua, Vol 46, Iss 10, Pp 104-108 (2020)
For fully mechanized caving face with high gas and fault occurrence, coal pillar with reasonable reserved width can not only support overlying strata pressure, but also isolate gas in goaf and reduce gas diffusion. However, there is a lack of researc
Externí odkaz:
https://doaj.org/article/7464a44fe5204ff488a29319c8fd503e
Publikováno v:
Gong-kuang zidonghua, Vol 46, Iss 4, Pp 98-103 (2020)
In reverse fault fracture zone of Tunbao Coal Mine, the coal pillar side roadway is affected by mining, which leads to large roadway deformation, roadway floor heave, coal pillar side wall heave, and local subsidence of roadway roof. Anchor stress wa
Externí odkaz:
https://doaj.org/article/4ad48010a706458893421bce948975ab
Publikováno v:
Gong-kuang zidonghua, Vol 37, Iss 5, Pp 100-102 (2011)
The paper introduced composition of plough mining system and application of technology of frequency-conversion speed-regulation in plough mining system. The application of technology of frequency-conversion speed-regulation improves efficiency of spe
Externí odkaz:
https://doaj.org/article/9f5c554f20364c3fb8a55c8f5e199731