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The rock damage mechanism of combined rock breaking with saw blade and conical pick [PDF]
Scientific Reports, 2023 The combined rock breaking method with the saw blade and conical pick is proposed to improve the rock breaking efficiency. The numerical simulation of combined rock breaking with the saw blade and conical pick is established to investigate the rock ...
Zhiwen Wang +5 more
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Research on rock breaking mechanism of PDC cutter under the action of ultrasonic vibration. [PDF]
PLoS ONEUltrasonic vibration technology has significant potential for breaking hard rocks. Understanding the optimal frequency for rock breaking under ultrasonic vibration can significantly reduce the cost of rock breaking and extend the service life of ...
Ruocheng Zhang +6 more
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Theoretical and numerical studies of rock breaking mechanism by double disc cutters
International Journal of Mining Science and Technology, 2023 A plane mechanical model of rock breaking process by double disc cutter at the center of the cutterhead is established based on contact mechanics to analyze the stress evolution in the rock broken by cutters with different spacings.
Yiqiang Kang +6 more
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Rotary cutting test on rock-breaking mechanism and efficiency of milled-tooth rolling cutters for shaft sinking by drilling methods [PDF]
Scientific ReportsTo address the low rock-breaking efficiency of milled-tooth rolling cutters used for shaft sinking via drilling methods in the Jurassic strata of Western China, this study conducted rotational cutting tests using a mechanical rock-breaking test platform.
Xiaoyun Wang +5 more
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Geofluids, 2023 The rock chip information (shape, size, and particle size distribution) could comprehensively reflect the characteristics of rock mass and rock-breaking efficiency of TBM.
Chuigang Zeng +5 more
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Chinese Journal of Mechanical Engineering, 2023 The operation of a shield tunnel boring machine (TBM) in a high-strength hard rock stratum results in significant cutter damage, adversely affecting the thrust and torque of the cutter head.
Hua Jiang +4 more
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Frontiers in Earth Science, 2023 As the main cutting tool of Tunnel Boring Machine (TBM) for rock-breaking, the rock-breaking efficiency of TBM disc cutters directly affects the TBM’s boring speed, which in turn affects the overall progress of the tunnelling project. Therefore, a simple
Guanghong Zhou +6 more
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Energy Exploration & ExploitationTo expedite drilling operations in hard rock of coal mines, a new type of impact-shear drill bit was developed, and its mechanism of speed-up and efficiency increase was studied. The RHT constitutive model was used to describe the structural behavior of rock, and the rock-breaking simulation model of full-size bit was established.
Pei Ju, Dongzhuang Tian
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Meitan kexue jishu, 2023 The cutterhead was one of the key parts of the Tunneling Boring Machine to achieve tunnel mining. Cutterhead’s continuous breaking rock was the rock destruction process under the cutter group.
Yadi LIU +4 more
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Force calculation model of TBM disc cutter based on rock breaking mode
Meitan xuebao, 2023 The rock breaking force of the disc cutter is the core parameter for studying the efficiency and safety of TBM excavation in hard rock tunnels, the key to improve the accuracy of the calculation model is how to match the calculation model with the rock ...
Jiulei CAO +5 more
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