Results 261 to 270 of about 140,971 (281)
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Geotechnical and Geological Engineering, 2020
In this paper, according to problems of large deformation, high stress and strong disturbance exist in the retracement roadway during the equipment withdrawal of 18,205 large height mining working face in Xiegou mine. The method of roof cutting and pressure release by deep-hole blasting is put forward.
Yufeng Guo, Hong Yu
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In this paper, according to problems of large deformation, high stress and strong disturbance exist in the retracement roadway during the equipment withdrawal of 18,205 large height mining working face in Xiegou mine. The method of roof cutting and pressure release by deep-hole blasting is put forward.
Yufeng Guo, Hong Yu
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Numerical Simulation of Strata Behavior in Super-Long and Large Mining Height Working Face
Advanced Materials Research, 2013In order to study the strata behavior characteristics in super-long and large mining height working face, the FLAC-3D software was used to study the roof displacement and the abutment pressure distribution laws of working faces. The results indicate that: ① the influence range is larger of front abutment pressure in Liuzhuang coal mine 171301 super ...
Zhi Hua Li +3 more
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Study on Rational Width of Entry Protection Coal-Pillar in Large Mining Height Working Face
Advanced Materials Research, 2011This paper demonstrates the attempt to identify a reasonable chain pillar width in the condition of large mining height, along with a case study at the gateway of No.1103 panel with large mining height in Suancigou Mine. Theoretical calculation and numerical simulation were employed as the main approaches during the research to figure out the rational ...
Xu Feng Wang +4 more
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Advanced Materials Research, 2011
Using unified model and theory of rock pressure, the problems, such as caving of stope roof with large mining height and destruction of support, strata movement and surface subsidence, are unified analyzed and researched. The results show that: pressure shell is dynamic shell, which moves forward with the propulsion of working face; with the increase ...
Ying Ma, Sheng Zhong
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Using unified model and theory of rock pressure, the problems, such as caving of stope roof with large mining height and destruction of support, strata movement and surface subsidence, are unified analyzed and researched. The results show that: pressure shell is dynamic shell, which moves forward with the propulsion of working face; with the increase ...
Ying Ma, Sheng Zhong
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Mine Water and the Environment, 2020
Grouting reinforcement was used to safely and efficiently exploit the thick coal seam in the Jiaozuo coalfield. First, the water inrush possibility of the 11,050 working face was evaluated, using both the floor failure depth and the water bursting coefficient (T) methods.
Shiqi Liu +4 more
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Grouting reinforcement was used to safely and efficiently exploit the thick coal seam in the Jiaozuo coalfield. First, the water inrush possibility of the 11,050 working face was evaluated, using both the floor failure depth and the water bursting coefficient (T) methods.
Shiqi Liu +4 more
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Advanced Materials Research, 2014
For the study on the problem of rational width of entry protection coal-pillar, according to the gateway of 5103 mining face in Heshan Mine, through theoretical calculation and numerical simulation, rational width of entry protection coal-pillar was educed, which was 25 m.
Xin Bin Xu, Bang Jun Wang, Ting Feng Cui
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For the study on the problem of rational width of entry protection coal-pillar, according to the gateway of 5103 mining face in Heshan Mine, through theoretical calculation and numerical simulation, rational width of entry protection coal-pillar was educed, which was 25 m.
Xin Bin Xu, Bang Jun Wang, Ting Feng Cui
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Advanced Materials Research, 2012
During the mining process of shallow buried long wall working face, the breaking of main roof easily result in fracture belt’s connectivity with the surface. The paper has studied the causation of roof cutting and support crushing in shallow-buried large mining height long wall working face of Suancigou coal mine which is in Ordos Inner Mongolia.
Yan Fang Ren +3 more
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During the mining process of shallow buried long wall working face, the breaking of main roof easily result in fracture belt’s connectivity with the surface. The paper has studied the causation of roof cutting and support crushing in shallow-buried large mining height long wall working face of Suancigou coal mine which is in Ordos Inner Mongolia.
Yan Fang Ren +3 more
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Mining Science and Technology (China), 2009
Under fully mechanized, large mining height top coal caving conditions, the shield beam slope angle of the support increases due to the enlargement of the top coal breaking and caving space. This results in a change of the caving window location and dimensions and, therefore, the granular coal-gangue movement and flows provide new characteristics ...
Chang-you LIU +2 more
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Under fully mechanized, large mining height top coal caving conditions, the shield beam slope angle of the support increases due to the enlargement of the top coal breaking and caving space. This results in a change of the caving window location and dimensions and, therefore, the granular coal-gangue movement and flows provide new characteristics ...
Chang-you LIU +2 more
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Physics of Fluids
The stability of “support-surrounding rock” system in a large dip angle and large mining height working face is the key to safe mining of the working face. A three-dimensional large-scale simulation experiment platform and a supporting hydraulic support were developed by combining field measurement, theoretical analysis, and three-dimensional physical ...
Baofa Huang +8 more
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The stability of “support-surrounding rock” system in a large dip angle and large mining height working face is the key to safe mining of the working face. A three-dimensional large-scale simulation experiment platform and a supporting hydraulic support were developed by combining field measurement, theoretical analysis, and three-dimensional physical ...
Baofa Huang +8 more
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