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Research on Optimization of Construction Parameters of Vertical Cross-Layer Fracturing in Thin Interbedded Coalbed Methane Reservoirs. [PDF]
ACS OmegaChen J, Zhu Y, Shao L, Liang L, Hu H.
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Deep-hole directional fracturing of thick hard roof for rockburst prevention
Tunnelling and Underground Space Technology, 2012Abstract Thick hard roof in coal mines is usually a significant factor that induces dynamic disasters, such as rockburst. This study introduces a new technology called directional hydraulic fracturing characterized by cutting out an initial groove in the borehole and then injecting high pressure liquid to break the rock.
Hu He, Linming Dou
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Study on the fracture characteristics of thick-hard limestone roof and its controlling technique
Environmental Earth Sciences, 2017The Taiyuan group is one of the coal-bearing formations in Shanxi Province, in which coal resource is extremely abundant. No.15 coal seam is the main minable coal seam in Taiyuan group, and it develops with thick-hard limestone roof which is a threat to safe and efficient mining because of the roof failure.
Jinlong Jia, Shiqi Liu, Jia Jinlong
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Numerical simulation study on hard-thick roof inducing rock burst in coal mine
Journal of Central South University, 2016In order to reveal the dynamic process of hard-thick roof inducing rock burst, one of the most common and strongest dynamic disasters in coal mine, the numerical simulation is conducted to study the dynamic loading effect of roof vibration on roadway surrounding rocks as well as the impact on stability.
Jiang He, Lin-Ming Dou, Zonglong Mu
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Numerical and Field Investigations of Rockburst Mechanisms Triggered by Thick-Hard Roof Fracturing
Rock Mechanics and Rock Engineering, 2022Zhi-Long He +2 more
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Geotechnical and Geological Engineering, 2021
In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established, and the relationship between the direct roof tensile stress and the empty roof distance was obtained. According to the criterion of roof stability, that is, the tensile stress of the roof does not exceed ...
Sen Yang +3 more
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In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established, and the relationship between the direct roof tensile stress and the empty roof distance was obtained. According to the criterion of roof stability, that is, the tensile stress of the roof does not exceed ...
Sen Yang +3 more
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Response and control technology for entry loaded by mining abutment stress of a thick hard roof
International Journal of Rock Mechanics and Minings Sciences, 2016Jianbiao Bai
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Sustainability, 2017 This paper presents the engineering geological properties and roof control tecnology for a thick coal seam fully-mechanized face mining with hard roof conditions (THC) at the Jinhuagong Coal Mine (JCM), northwest China.
Weibin Guo +2 more
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