Results 21 to 30 of about 141,433 (299)
Effect of Soft–Hard Rock Composites on Rock Breaking Efficiency of TBM Disc Cutters in Deep Tunnels [PDF]
Applied SciencesSoft–hard composite strata are widely distributed in the surrounding rock of deep tunnels, which severely reduces TBM excavation efficiency. To elucidate the rock-breaking mechanism of TBM disc cutters in composite strata and to address unresolved issues related to cutter force evolution, a self-developed rotary cutting test platform was employed, and ...
Heng Sun +8 more
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Rock-breaking efficiency of TBM based on particle-size distribution of rock detritus
Yantu gongcheng xuebao, 2019 The shape, particle size and its distribution of rock detritus are the key indexes to reflect the rock-breaking efficiency of TBM, and the important internal link between TBM tunneling parameters and rock properties as well.
YAN Chang-bin 1, JIANG Xiao-di 1, LIU Zhang-heng 1, YANG Ji-hua 2, MIAO Dong 2
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Study on Rock-Breaking Efficiency and Adaptability of Wedge Tooth Cutters in Complex Formations
Scientific Journal of TechnologyIn composite strata, the excavation efficiency of tunnel boring machines (TBMs) is significantly influenced by the morphology of stratigraphic interfaces. This study employs the Abaqus explicit dynamics module to establish an interaction model between wedge-toothed cutterheads and composite strata, investigating the matching relationship between ...
Hongbin Liu +4 more
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Research on Cutter Surface Shapes and Rock Breaking Efficiency Under High Well Temperature
SSRN Electronic Journal, 2022 Dongdong Song +3 more
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IOP Conference Series: Earth and Environmental Science, 2021 Abstract Tearing cutters are generally applied to break rocks when shield tunnelling in the strata with large size boulders. To improve rock breaking efficiency, the processes of tearing cutter impacting rock model are simulated, and the effects of cutter mass, impact velocity and spacings on specific energy of rock breaking are studied.
Jinguo Cheng +4 more
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Enhancing CO2 Injection Efficiency: Rock-Breaking Characteristics of Particle Jet Impact in Bottom Hole [PDF]
AtmosphereStoring CO2 in oil and gas reservoirs offers a dual benefit: it reduces atmospheric CO2 concentration while simultaneously enhancing oil displacement efficiency and increasing crude oil production. This is achieved by injecting CO2 into producing oil and gas wells.
Zhichao Wang, Jian Zhao
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Study on Rock Breaking Efficiency of Non Planar PDC Teeth
Academic Journal of Science and TechnologyIn order to explore the law of rock breaking efficiency of existing non planar teeth in sandstone, indoor single tooth rock breaking experiment and numerical simulation of rock breaking are carried out for planar teeth, sharp circular teeth and axe teeth, and the effects of different eating depth and rake angle on rock breaking efficiency of PDC teeth
Feng Ling
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Improving efficiency of rock breaking using pre-weakening of rock mass [PDF]
Eurasian Mining, 2023 Erbolat Aben +3 more
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IOP Conference Series: Earth and Environmental Science, 2019 Yuping Yang +5 more
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With the wide application of large-diameter tunnel engineering in complex stratum, the rock-breaking efficiency of shield cutter has become a key factor restricting the tunneling efficiency. Most of the existing studies focus on the force and spacing optimization of single-edged disc cutters, and the systematic analysis of the coupling mechanism ...
Li-ping Li +5 more
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