Zobrazeno 1 - 10
of 38
pro vyhledávání: '"large diameter borehole"'
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 11, Pp 23-32 (2023)
Drilling-cutting method is a commonly used coal bump risk detection method in coal seams. The efficient and accurate acquisition of the quality of drilling-cuttings is a technical difficulty in engineering site, which could directly affect the risk d
Externí odkaz:
https://doaj.org/article/f70f67c8930d45e68413093d4411140a
Publikováno v:
Applied Sciences, Vol 14, Iss 8, p 3202 (2024)
Based on the ‘three highs and one low’ geological conditions of high gas pressure, high gas content, high ground stress, and low permeability in deep coal seams, this study proposes a dual method of hydraulic fracturing of key layers of overlying
Externí odkaz:
https://doaj.org/article/c1bcd00a41604c5b953da437df218361
Publikováno v:
Meikuang Anquan, Vol 53, Iss 1, Pp 79-84 (2022)
In order to study the effect of pressure relief of large diameter borehole on surrounding rock strength and anchoring force, according to the thick wall theoretical model, the corresponding relationship between the laboratory experiment and the stren
Externí odkaz:
https://doaj.org/article/6332bea030eb45c29505dccdcb51f8ee
Publikováno v:
Gong-kuang zidonghua, Vol 47, Iss 1, Pp 28-35 (2021)
For large diameter gas extraction boreholes, the solid material sealing method has a good sealing effect at the beginning. However the gas concentration of the extracted gas from the borehole decreases rapidly after the deformation and destruction of
Externí odkaz:
https://doaj.org/article/64e730107f2343978737cbe6831b02b9
Autor:
SHAO Guoan, ZOU Yongming
Publikováno v:
Meikuang Anquan, Vol 51, Iss 9, Pp 6-10 (2020)
Based on the engineering background of gas control in the close distance coal seams goaf in Xiaohuigou Coal Mine, the experimental study on the pressure relief gas extraction of goaf with the large diameter borehole in close distance coal seams is ca
Externí odkaz:
https://doaj.org/article/1db08a64b5d3454fb1c6a35ece1290ef
Publikováno v:
Energy Science & Engineering, Vol 8, Iss 8, Pp 2831-2840 (2020)
Abstract Large‐diameter borehole destressing technology is one of the main technical measures for the prevention and control of coal mine rock burst. In engineering practice, there is generally a contradicting problem due to the presence of excess
Externí odkaz:
https://doaj.org/article/c264eacc35ee43bc84506473f1fd4831
Akademický článek
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Publikováno v:
Applied Sciences, Vol 12, Iss 16, p 7967 (2022)
Large-diameter drilling is an effective method for preventing rock burst disasters in coal mines. In this paper, the roadway stability of the W1123 fully mechanized caving work face of the Kuangou coal mine, located in northwest China, is investigate
Externí odkaz:
https://doaj.org/article/453303ae48824d5aac588c05fab1310b
Autor:
SHAO Guoan, ZOU Yongming
Publikováno v:
Meikuang Anquan, Vol 51, Iss 11, Pp 74-77, 82 (2020)
Based on the background of the large diameter borehole extraction for the goaf of No.2201 working face in Xiaohuigou Coal Mine, the prevention of residual coal spontaneous combustion in the goaf under the condition of the large diameter borehole extr
Externí odkaz:
https://doaj.org/article/8bd7c93a1ea145138293cc0422b3f4d9
Autor:
LIANG Donglin
Publikováno v:
Meikuang Anquan, Vol 51, Iss 6, Pp 77-80, 86 (2020)
In order to effectively control the problem that the oxygen concentration is not up to the standard in the upper corner of the working face and the return air roadway, by the technique of large diameter borehole of overburden layer and casing hole pr
Externí odkaz:
https://doaj.org/article/65181c05536a47b5963ad30ecfb2f0ab