Heat-fluid-solid coupling mechanism of supercritical carbon dioxide jet in rock-breaking
Petroleum Exploration and Development, 2021 Aiming at the synergistic rock-breaking mechanism of supercritical carbon dioxide (SC-CO2) jet pressure and temperature difference, a heat-fluid-solid calculation model of rock-breaking stress was established and verified to be effective, and the ...
Mukun LI +5 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
Hopf algebras and Markov chains: Two examples and a theory [PDF]
, 2013 The operation of squaring (coproduct followed by product) in a combinatorial Hopf algebra is shown to induce a Markov chain in natural bases. Chains constructed in this way include widely studied methods of card shuffling, a natural "rock-breaking ...
A. Hatcher +94 more
core +3 more sources
Automatic Determination of Rock-Breaking Target Poses for Impact Hammers
Energies, 2022 This paper describes a system for the automatic determination of rock-breaking target poses for impact hammers used in underground mines. The rock-breaking target pose is defined as the position and angle at which the impact hammer must strike a rock in ...
Daniel Cárdenas +3 more
doaj +1 more source
Improving rock classification in terms of explosivity [PDF]
, 2019 Purpose. To improve rock classification in terms of explosivity relying upon the detailed analysis of characteristics of rating classifications available in the Russian Federation and in the world. Methods.
Kirsanov, A +5 more
core +1 more source
Study of rock displacement with the help of equivalent materials using room-and-pillar mining method [PDF]
, 2012 Field study made with the help of equivalent materials to determine minimum dimension of interchamber and barrier pillars and limiting chamber span was carried out.
Buzilo, V.I. +2 more
core +1 more source
The Ontology of Material Objects [PDF]
, 2002 [First paragraph] For a long time philosophers thought material objects were unproblematic. Or nearly so. There may have been a problem about what a material object is: a substance, a bundle of tropes, a compound of substratum and universals, a ...
Olson, E.T.
core +1 more source
Simulation of sample testing under compression with the help of finite-element model of rocks being broken [PDF]
, 2018 Purpose of the paper is to develop mathematical model describing nature of argillous and salt samples under compression and to make available microdefects using finite-element method. Methods.
Chantsev, V, Olovyannyy, A
core +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
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