Substantiating rational parameters of a method for shrinkage ore stoping while developing thin- vein steeply inclined deposits [PDF]
, 2018 Objective of the paper is to substantiate rational ore-stoping technique while using small wells in the context of thin-vein steeply inclined deposit mining.
Denyshchenko, Oleksandr +3 more
core +1 more source
The effects of process parameters on the rock-breaking efficiency of multi-nozzle jet
Journal of Petroleum Science and Engineering, 2021 Abstract This paper examines the effect of multi-nozzle bit on sandstone specimens by means of numerical simulation and experiment, and the rationality is verified. Numerically, the effects of jets with different diameters and angles on rock were simulated by using LS-DYNA, and the rock-breaking shapes of jets with different angles are analyzed ...
Lipeng He +5 more
openaire +1 more source
Design optimization of TBM disc cutters for different geological conditions [PDF]
, 2015 A novel optimization methodology for the disc cutter designs of tunnel boring machines (TBM) was presented. To fully understand the characteristics and performance of TBM cutters, a comprehensive list of performance parameters were investigated ...
Liu, Jingsheng, Xia, Yimin, Zhang, Kui
core +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 +1 more source
Influences of Microwave Irradiation on Rock-Breaking Efficiency of a Reduced-Scale TBM Cutter
Applied Sciences, 2023 To explore the influences of microwave irradiation on the rock-breaking efficiency of tunnel boring machine (TBM) cutters, a multimode cavity with a microwave power of 2100 W was used to conduct microwave irradiation tests on Chifeng basalt for different durations.
Gaoming Lu +4 more
openaire +2 more sources
Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming [PDF]
, 2018 Purpose. Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming for determination of transient temperature distribution along the borehole surface and the average coefficient of heat transfer from the plasma ...
Horiachkin, V +7 more
core +1 more source
Improvement of hole drilling technology for ore drawing intensification [PDF]
, 2018 Purpose. The improvement of hole drilling for increasing the mineral recovery ratio by ore drawing improvement through blasting. Methods. The drilling parameters were examined for rock dumps.
Gaponenko, I +3 more
core +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
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
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
doaj +1 more source