Results 21 to 30 of about 753 (208)
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesDouble-roadway tunneling technology can effectively relieve the mining‐replacement pressure associated with the combined use of double roadways and gob-side entry driving in traditional longwall panels, but it also introduces difficulties in maintaining ...
Dongdong Chen +4 more
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Energies, 2019 The hanging of hard roof strata in the gob-side retaining entry in deep mines could lead to dynamic disasters. The pressure relief mechanism for the hard roof strata using shallow-hole blasting was investigated by a combined method of theoretical ...
Yong Chen +4 more
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Optimization study on filling material beside gob-side entry retaining
Meikuang Anquan, 2021 In order to make gob-side filling body of gob-side entry retaining adapt to the roof movement, the properties of concrete material is modified by adding polymer and steel fiber to achieve the purpose of “yield-support”. The test of modified concrete was carried out to test the uniaxial compressive strength under different ratios, and the best ratio of ...
HUANG Zhengdong, ZHANG Dongfeng, ZHANG Xiaoqiang
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Study of the Constraint Pillar Test and the Application in Gob-Side Entry Retaining
Applied SciencesFirmly, the bearing capacity test of 1:1 equal ratio pillar under different constraint forms and different filling medium conditions was carried out. The results show that the binding pillar-forming effect is relatively good. The constraint ability of unconstrained, metal mesh, polyester mesh, hooked iron flat-hoop bushing, bellows, and spiral iron ...
Jinzhou Tian +4 more
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Control of floor heaves with steel pile in gob-side entry retaining
International Journal of Mining Science and Technology, 2016 Abstract A new approach named as steel pile method is innovatively proposed in this study to control severe floor heaves in gob-side entry retaining. It is required that the steel piles be installed in the floor corners with a certain interval before the influence of the dynamic pressure induced by current panel extraction. Using numerical simulation
Jianbiao Bai
exaly +2 more sources
Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob‐Side Entry Retaining [PDF]
Shock and Vibration, 2021 The gob‐side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue. According to the characteristics of the crossheading roof at the 2103 working face of a mine in Shanxi, a structural mechanics model of the roof was established to derive the theoretical ...
Peng Li +4 more
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Stability study on naturally filling body in gob-side entry retaining
International Journal of Mining Science and Technology, 2012 Abstract In the construction of the filling gob-side entry retaining in a lane, we utilize the self-slide natural phenomenon of a falling gangue in an inclined coal seam goaf. First, we put the falling gangue of goaf above the laneway and made it the main filling material by adopting the measurement of flexible supporting system combined with those ...
Baojing Zhou +3 more
exaly +2 more sources
Research on surrounding rock control technology of roof cutting and pressure relieving for roadside filling in gob-side entry retaining of large mining height panel [PDF]
Scientific ReportsThis article takes the transportation channel of the 2507 working face as the engineering background to carry out the analysis of the surrounding rock failure mechanism of the roadside filling in gob-side entry retaining of large mining height panel, and
Lu Weiyong +5 more
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Energies, 2023 Gob-side entry retaining by roof cutting, a pillarless mining technique, plays a critical role in maintaining continuous production, rapid connection, and enhancing the coal recovery rate in fully mechanized top coal caving working faces.
Yongkang Yang +3 more
doaj +2 more sources
Energy Science & Engineering, 2019 The successful retaining of the gob‐side entry under a thick and hard roof stratum is difficult because of the high pressure present and complex construction technology commonly used.
Wanpeng Huang +5 more
doaj +2 more sources