Results 11 to 20 of about 143,249 (287)
International Journal of Mining Science and Technology, 2023 When the traditional drill and blast method is applied to rock crushing projects, it has strong vibration, loud noise and dust pollution, so it cannot be used in densely populated areas such as urban public works.
Xiaofei Wang +4 more
doaj +3 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
Energy Reports, 2023 Geothermal reservoir rocks have the characteristics of high stress, high hardness and high abrasiveness, which makes the drilling rate low and the drilling cost high, and hinders the application of geothermal energy. Improving drilling efficiency in hard
Jian Huang +6 more
doaj +3 more sources
Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock
International Journal of Mining Science and Technology, 2017 The rock-breaking mechanism and effect of confined blasting were analysed by blasting and impact dynamic mechanics, fluid dynamic mechanics, fracture mechanics as well as blasting experiment.
Liu Changyou, Yang Jingxuan, Yu Bin
doaj +3 more sources
Experimental study on rock-breaking mechanism of micro-coring PDC bit [PDF]
Journal of Petroleum Exploration and Production Technology, 2021 AbstractIn this paper, in order to study the rock-breaking mechanism of the micro-coring PDC bit, a series of unit breaking experiments containing 2 breaking forms (static-pressure breaking and fracture breaking) are conducted on core columns of sandstone, limestone, and granite. Besides, a full-sized micro-coring PDC bit with a diameter of 152.4 mm is
Shengsong Huang +4 more
openaire +1 more source
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
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
On the puzzling feature of the silence of precursory electromagnetic emissions [PDF]
, 2013 It has been suggested that fracture-induced MHz-kHz electromagnetic (EM) emissions, which emerge from a few days up to a few hours before the main seismic shock occurrence permit a real-time monitoring of the damage process during the last stages of ...
Chelidze, T. +2 more
core +2 more sources
International Journal of Mining Science and Technology, 2022 CO2 drilling is a promising underbalance drilling technology with great advantages, such as lower cutting force, intense cooling and excellent lubrication.
Can Cai +4 more
doaj +1 more source
Studies of new nonadhesive anchoring [PDF]
, 2018 Purpose is to develop anchoring with nonadhesive high-strength roof bolting in terms of large pre-destructive deformations and its testing under laboratory conditions. Methods.
Kurdiumow, D +3 more
core +1 more source