Results 1 to 10 of about 3,819,291 (249)
Machines, 2023 In this paper, we propose an ultrasonically coupled mechanical rock-breaking technology, creatively design an ultrasonically coupled mechanical rock-breaking drum, concurrently develop an ultrasonic cracking simulation method based on test coordination ...
Chengwen Liu +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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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
doaj +3 more sources
Heat-fluid-solid coupling mechanism of supercritical carbon dioxide jet in rock-breaking
Petroleum Exploration and Development, 2021 Aiming at the synergistic rock-breaking mechanism of supercritical carbon dioxide (SC-CO2) jet pressure and temperature difference, a heat-fluid-solid calculation model of rock-breaking stress was established and verified to be effective, and the ...
Mukun LI +5 more
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Research on the modulation mechanism and rock breaking efficiency of a cuttings waterjet
Energy Science & Engineering, 2019 The feasibility of a cuttings waterjet directly modulated in the bottom hole is discussed from the aspects of cuttings suction and rock‐breaking efficiency.
Peng Wang +5 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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The rock damage mechanism of combined rock breaking with saw blade and conical pick
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
doaj +1 more source
Energy Science & Engineering, 2021 Compound percussive drilling technology is a new method to improve the rock‐breaking efficiency in deep hard formation. In order to study the rock‐breaking mechanism of compound impact drilling, the thermal‐structure coupling simulation of the dynamic ...
Wei Wang +5 more
doaj +1 more source
Research status on rock-breaking mechanism and performance testing methods of PDC bit cutters
Jin'gangshi yu moliao moju gongcheng, 2023 Polycrystalline diamond compact (PDC) drill bits are one of the main rock breaking tools in drilling engineering. The performance indexes, such as rock breaking efficiency, wear resistance, thermal stability and impact resistance of PDC bit cutters, have
Yancao LI
doaj +3 more sources
Applied Sciences, 2019 The low rock breaking efficiency of conventional polycrystalline diamond compact (PDC) bits in hard abrasive formations prompts the development of PDC cutting elements from the planar structure to the non-planar structure.
Jianxun Liu +4 more
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