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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 +5 more
semanticscholar +4 more sources
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 +4 more
semanticscholar +4 more sources
ProcessesIn the process of roadway excavation in thick and hard coal seams with a hard roof, the instantaneous release of a large amount of elastic energy accumulated in coal and rock mass causes disasters.
Zhongzong Cao +4 more
semanticscholar +2 more sources
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 +4 more
openaire +3 more sources
Optimization Analysis of Advanced Support for Thick and Hard Roof
International Journal of Natural Resources and Environmental StudiesBased on the geological conditions of 1033 working face in Yuandian No.1 Coal Mine, this paper studies the support distance and support strength of hydraulic support in the advanced section of roadway roof.
Yongkun Zhang, Kaiwei Wang
semanticscholar +2 more sources
Response and control technology for entry loaded by mining abutment stress of a thick hard roof
International Journal of Rock Mechanics and Mining Sciences, 2016Shen Wenlong +3 more
semanticscholar +4 more sources
Effect of Thick–Hard Main Roof Fracturing on the Spatiotemporal Evolution of Overburden Fractures
Applied SciencesGas gushing and the co-mining of coal and gas outbursts are common disasters in coal mines. The weakening of thick–hard main roof fracturing can effectively alleviate the gas overrun in the initial mining stage.
Jinfeng Ju, Chengen Qi, Zhu Li
semanticscholar +3 more sources