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Applied Sciences (Switzerland)Roof cutting by dense drilling is one of the main methods of gob-side entry retaining. Taking the 203 working face of the Ruineng Coal Mine as the engineering background, a mechanical model is established to clarify the roof breaking mechanism. Numerical simulation is conducted to analyze the roof cutting effects of different parameters, and reasonable
Hongping Yuan, Panshi Xie, Xie Panshi
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Sustainability, 2023 In order to solve the problem of serious deformation and failure of surrounding rock and difficult maintenance of gob-side entries with strong mining-induced small coal pillars, taking the A110607 return airway of the Shanwenjiaba Coal Mine as the engineering background, the key parameters of roof-cutting and pressure relief control technology for ...
Zhenqian Ma, Ma Zhenqian
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Frontiers in Ecology and Evolution, 2023 IntroductionSoft rock mining roadways are severely deformed and damaged during coal mining. Blindly increasing the support strength not only has little effect but also wastes material resources.MethodsMaintaining the original support parameters, model experiments were conducted to investigate the mechanism of pressure relief protection of the front ...
Tingchun Li, Li Tingchun
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Study on the Ground Pressure Manifestation Patterns of Roof Cutting and Pressure Relief
Applied Sciences (Switzerland)Pillarless mining technology is of great significance for improving coal recovery rates, but the intense mining-induced stress disturbances on gob-side entries often lead to surrounding rock instability. In this study, we focused on the ground control challenges in the headgate of Panel 81308 at Huayang Mine No. 2.
Zheng, Runhu +3 more
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International Journal for Numerical and Analytical Methods in Geomechanics
ABSTRACT Under complex deep mining conditions, crosscuts adjacent to goafs often face severe surrounding rock stability issues due to the hanging of hard roofs and mining disturbances. Taking the large deformation of the 261 cross‐cut at Huoshaopu Coal Mine as an example, hydraulic fracturing for roof cutting and pressure relief was ...
Wu Xuewu +5 more
openaire +1 more source
ABSTRACT Under complex deep mining conditions, crosscuts adjacent to goafs often face severe surrounding rock stability issues due to the hanging of hard roofs and mining disturbances. Taking the large deformation of the 261 cross‐cut at Huoshaopu Coal Mine as an example, hydraulic fracturing for roof cutting and pressure relief was ...
Wu Xuewu +5 more
openaire +1 more source
Frontiers in Earth ScienceThick sandstone roof strata exacerbate surrounding rock deformation and failure in roadways, posing a severe threat to safe and efficient coal mine production. To address the challenge of controlling surrounding rock in high-stress roadways under such conditions, a novel composite roof cutting and pressure-relief method leveraging the dilation ...
Hainan Gao +10 more
exaly +2 more sources
Geotechnical and Geological Engineering, 2020
The technology of gob-side entry retaining by roof cutting can release mining pressure and reduce the deformation of roadway surrounding rock. In order to solve the problem of the hard roof of the Baoshan Coal Mine being under intense pressure and the effect of the retaining roadway being poor, a field test of directional presplitting blasting for the ...
Xiaojie Yang +3 more
openaire +1 more source
The technology of gob-side entry retaining by roof cutting can release mining pressure and reduce the deformation of roadway surrounding rock. In order to solve the problem of the hard roof of the Baoshan Coal Mine being under intense pressure and the effect of the retaining roadway being poor, a field test of directional presplitting blasting for the ...
Xiaojie Yang +3 more
openaire +1 more source