Yantu gongcheng xuebao, 2020 In order to improve the rock-breaking efficiency of raising boring cutters under hard brittle rock, it is necessary to obtain the optimal drilling pressure. The analysis of the size of rock ballast is an important means. The cone-tipped cutter is used to
TAN Hao 1, 2, JI Hong-guang 1, ZENG Zhi-yuan 3, LIU Zhi-qiang 2
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Numerical Simulation of Rock Breaking by High-Temperature and High-Pressure Water under Thermal Driving [PDF]
, 2022 To solve the difficult problems in the field of unconventional oil and gas extraction and hard rock excavation in urban underground spaces, this paper proposes a rock-breaking technique with high-temperature and high-pressure water under thermally driven
Shuogang Pang +4 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 Optimum Free-face Condition of Cutting Hard Rock with Tunnel Boring Machine Hob [PDF]
, 2021 To explore the rock-breaking characteristics of cutting hard rock under free-face condition by tunnel boring machine (TBM) hob and obtain the optimum free-face condition, the rock-breaking processes such as crack propagation, amount of micro crack and ...
Zhang, Xuhui +4 more
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Research on kinematics analysis of spherical single-cone PDC compound bit and rock breaking simulation verification [PDF]
, 2021 The single-cone bit has become the first choice for slim hole sidetracking and deep well drilling with its unique rock breaking method and high ROP (Rate Of Penetration), with its main failure mode being of early excessive wear of the cutting teeth.
Chunyan Kong +3 more
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Design and Simulation of Bionic Coupling PDC Cutter
Shiyou jixie, 2021 In order to solve the problems of PDC bit such as low working efficiency, easy stratification of diamond and hard alloy and bit balling formed by delayed discharge of rock fragment, the structure of polycrystalline diamond-hard alloy interface and the ...
吴泽兵, 席凯凯, 王杰, 郭禹伦
doaj
Investigation on the Rock-Fragmentation Process of Conical-Shaped TBM Cutterhead in Extremely Hard Rock Ground [PDF]
, 2023 Conical-shaped cutterhead is one type of tunnel boring machine (TBM) cutterhead which may have advantage of high rock-breaking efficiency in extremely hard rock ground. This study investigated the rock-fragmentation process of disc cutters on the conical-
Hu, Rucheng +4 more
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Study on Rock Breaking Characteristics of a Hybrid Bit
Shiyou jixie, 2020 Existing conventional PDC and roller bits are unable to meet the rock breaking requirements in deep and hard formations, difficult-to-drill formations and soft and hard formations.
吴泽兵 +4 more
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Study and Application of Rock Breaking Mechanism of Concentrated Water Hydraulic Smooth Blasting in Broken Sand-Stone Geological Conditions [PDF]
, 2022 The use of polyenergy water pressure controlled blasting technology in tunnel construction is gradually being promoted, and the technology is often used in hard rock, and the mechanism of rock breaking in fractured sandstone strata is still lacking ...
Yuanyuan Tian +9 more
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Using a high-pressure water jet-assisted tunnel boring machine to break rock
Advances in Mechanical Engineering, 2020 The concept of tunnel boring machine (TBM) disc cutter rock breaking coupled with high-pressure water jets has been proposed to overcome the difficulties that occur when TBMs encounter extremely hard rocks.
Jinliang Zhang +5 more
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