Results 81 to 90 of about 49,627 (206)

Visualization test and numerical simulations of 2D blasting crack propagation

open access: yesJournal of Rock Mechanics and Geotechnical Engineering
Drilling and blasting, characterized by their efficiency, ubiquity, and cost-effectiveness, have emerged as predominant techniques in rock excavation; however, they are accompanied by enormous destructive power. Accurately controlling the blasting energy
Shan Guo, Manchao He, Seokwon Jeon
doaj   +1 more source

Evacuation of coal from hoppers/silos with low pressure pneumatic blasting systems [PDF]

open access: yes, 1977
The need for an efficient, economical, effective and quiet device for moving coal and other difficult bulk solids was recognized. Thus came the advent of the low pressure pneumatic blasting system - a very efficient means of using a small amount of plant
Fischer, J. S.
core   +1 more source

Technology development of Kryvyi Rih iron ore open pits within zones stoping of underground mine working [PDF]

open access: yes, 2015
На современном этапе отработка залежей железных руд в Кривбассе ведется в условиях как совместных открытых и подземных горных работ, так и открытой разработки месторождений в зонах, подработанных подземными выработками.
Babets, Ye. K.   +2 more
core  

Blasting vibration response characteristics of tunnel support structures in horizontally layered rock masses under initial in-situ stress

open access: yes河南理工大学学报. 自然科学版
ObjectivesTo analyze the stability of surrounding rock during tunnel blasting excavation in horizontally layered rock masses under initial in-situ stress.MethodsUsing LS-DYNA finite element software, numerical models were established under three ...
Yu Jianxin   +3 more
doaj   +1 more source

Дослідження сегрегації для розробки техногенних покладів з метою вдосконалення якості продукції [PDF]

open access: yes, 2018
Виявлено теоретичне підґрунтя ефекту сегрегації при складуванні відходів збагачення з урахуванням високоякісного опису різних фракцій, проведені розрахунки щодо визначення основних параметрів технологічного процесу складування та подальшої ...
Kustov, V.   +11 more
core  

English for Study and Work: Coursebook in 4 books. Book 2 Obtaining and Processing Information for Specific Purposes [PDF]

open access: yes, 2015
Подано всі види діяльності студентів з вивчення англійської мови, спрямовані на розвиток мовної поведінки, необхідної для ефективного спілкування в академічному та професійному середовищах.
Зуенок, И. И.   +15 more
core  

Amazonian Hydrothermal Alteration Comparing Nakhlite Secondary Mineralogy to Water Rock Reaction Experiments [PDF]

open access: yes, 2018
We report on results from experiments with Mars analog materials under diagenetic conditions. The mineralogical results of our experiments suggest that an important type of fluid alteration in the Amazonian may be short duration (e.g.
Bridges, J. C.   +14 more
core  

Damage Characteristics of Rock Mass Under Cutting Blasting in Sharp Inclined Narrow Vein Mines

open access: yesApplied Sciences
In the drift mining of sharp, inclined, narrow veins, the efficacy of cutting blasting directly governs the efficiency of blasting operations. However, the mechanisms of rock mass damage and fracturing induced by cutting blasting in sharp inclined narrow
Shenggang Wu   +5 more
doaj   +1 more source

Influence of rock mass properties and powder factor on the fractal dimension of the natural rock mass blocks during blasting

open access: yesDiscover Geoscience
The rock mass fragmentation in discontinuous rock mass is a concern issue in rock mass blasting. The purpose of the study is to find out the influencing parameters of rock mass and blast design in degree of fragmentation of natural block during blasting.
Ajay Pratap Singh Tomar   +3 more
doaj   +1 more source

Discrete element models for rock blasting

open access: yesInternational Journal for Engineering Modelling, 1992
This is rock blasting application of FDEM.
Munjiza, Ante, Owen, D. Roger J.
openaire   +2 more sources

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