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Rock-Breaking Laws of Disc Cutters with Different Height Differences in Hard Rock Strata
Advances in Civil Engineering, 2022 When shield machine traverses through hard rock mass, disc cutters will be abraded to different degrees. Excessive height difference exists between adjacent disc cutters, which critically affects the rock-breaking efficiency.
Zelin Lu +5 more
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Energy Reports, 2023 Geothermal reservoir rocks have the characteristics of high stress, high hardness and high abrasiveness, which makes the drilling rate low and the drilling cost high, and hinders the application of geothermal energy. Improving drilling efficiency in hard
Jian Huang +6 more
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Meitan kexue jishuRapid excavation of hard rock tunnels was a crucial aspect in achieving intelligent and efficient coal mining. Cantilever roadheaders, TBMs, and bottom cutting equipment are all attempting to address this challenge.
Chao LI +4 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.
Pei Ju, Dongzhuang Tian
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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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Applied SciencesThe TBM disc cutter cuts soft–hard composite strata during shield construction, and the cutter–rock cutting process generates high temperatures and severe wear.
Xiongfei Lyu +3 more
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Research on rock breaking characteristics of impact hob of hard rock excavator
Journal of Vibroengineering, 2023 During hard rock excavation in the process of tunnel construction, the hard rock excavator wears seriously and quickly and reduces its excavation efficiency. Aiming at this problem, this paper proposes a composite rock breaking method by impact rolling and cutting as a solution.
Lei Lou +3 more
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Numerical simulation study on rock-breaking process and mechanism of compound impact drilling
Energy Reports, 2021 Improving the rock-breaking efficiency of hard rock formation has always been of concern in drilling. Compound impact drilling technology is a new method to achieve efficient crushing of hard rock by exerting axial and torsional impacts on the drilling ...
Wei Wang +4 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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Energies, 2022 The Permian igneous rock in Shunbei Oilfield exhibits high rock strength, which results in a low rate of penetration (ROP) and shortens the cutter’s service life. It is necessary to analyze and evaluate the rock breaking effect of cutters.
Zhuoxin Dong +6 more
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