Rotary cutting test on rock-breaking mechanism and efficiency of milled-tooth rolling cutters for shaft sinking by drilling methods [PDF]
Scientific ReportsTo address the low rock-breaking efficiency of milled-tooth rolling cutters used for shaft sinking via drilling methods in the Jurassic strata of Western China, this study conducted rotational cutting tests using a mechanical rock-breaking test platform.
Xiaoyun Wang +5 more
doaj +4 more sources
Geofluids, 2023 The rock chip information (shape, size, and particle size distribution) could comprehensively reflect the characteristics of rock mass and rock-breaking efficiency of TBM.
Chuigang Zeng +5 more
doaj +2 more sources
Study on rock-breaking efficiency evaluation of TBM disc cutters based on Rostami prediction equations [PDF]
Frontiers in Earth Science, 2023 As the main cutting tool of Tunnel Boring Machine (TBM) for rock-breaking, the rock-breaking efficiency of TBM disc cutters directly affects the TBM’s boring speed, which in turn affects the overall progress of the tunnelling project. Therefore, a simple
Guanghong Zhou +6 more
doaj +2 more sources
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
doaj +2 more sources
Simulation study of rock-breaking performance of TBM cone-shape cutterhead under different tunneling parameters in spiral tunnel [PDF]
Science ProgressCompared with plane cutterhead, the cone-shape cutterhead has better rock-breaking performance with a free surface during the rock-breaking process. Tunneling parameters of cone-shaped cutterhead have great influence on the rock-breaking efficiency and ...
Laikuang Lin +7 more
doaj +2 more sources
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
doaj +2 more sources
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
Drilling performance analysis of impregnated micro bit [PDF]
Mechanical Sciences, 2022 The cutting mechanical properties of impregnated diamond bit depend on the performance of its cutting elements. Aiming at the factors affecting the cutting element performance of impregnated diamond bit, the laboratory rock breaking experiment of ...
D. Song +11 more
doaj +1 more source
Research on influencing factors of rock breaking efficiency under ultrasonic vibration excitation
AIP Advances, 2023 The ultrasonic vibration rock-breaking technique shows broad application prospects in the hard-rock-breaking domain. The rock-breaking efficiency strongly depends on vibration parameters.
Zhanbiao Yang +3 more
doaj +1 more source
Experimental Study on Granite Broken by PDC Bit under High Temperature and High Pressure
Shiyou jixie, 2021 As the exploration and development of oil and gas gradually advance to the deep layer, the formation temperature and pressure keep increasing. The efficiency of PDC bit breaking deep hard rock under high temperature and high pressure is reduced, and the ...
Shi Huaizhong +5 more
doaj