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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
doaj +4 more sources
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
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
doaj +2 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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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 +3 more sources
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 polycrystalline diamond compact (PDC) cutters.
Zhang R +6 more
europepmc +4 more sources
Research on rock damage characteristics of gravity tunneling machine based on different rotational speeds [PDF]
Scientific ReportsTo address the challenges of difficult rock excavation and low mechanical breaking efficiency in vertical shafts, a gravity-driven shaft tunneling machine with improved adaptability for medium-hardness rock tunneling has been developed.
Xiang-Fei Jin +6 more
doaj +2 more sources
Analyzing mechanics of rock breaking under conditions of hydromechanical drilling [PDF]
Mining of Mineral Deposits, 2021 Purpose is to substantiate design factors and technological parameters of next-generation facilities of hydromechanical drilling basing upon the determined features of interaction between breaking pellets and rock mass. Methods. The studies of directionality features and bottomhole processes for rock mass breaking have been carried out using the
openaire +2 more sources
Use of the energy of parametric oscillations to improve drilling indices [PDF]
, 2011 Purpose. Increase of the efficiency of using energy of parametric oscillations within the assembly of drilling string bottom by means of solving nonlinear-parametric equations of a “bit – drive motor – drilled-out rock” system to improve drilling indices.
Bakenov +11 more
core +2 more sources
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