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The impact of vibration mechanism’ installation place on the process of retrieving stuck drill pipe
(National Mining University, 2016-09-30)
Purpose. The present paper studies the dependence of the dynamic oscillatory movements in the area of drill string sticking on the parameters of vibrating mechanism and place of its installation in the heavy weight drill ...
Studying a crack initiation in terms of elastic oscillations in stress strain rock mass
(National Mining University, 2016-06-30)
Purpose. Deriving the criterion of a crack (joint) initiating under simultaneous effect of the rock stress state and elastic oscillations generated by an external source is the research purpose. Determining the quantitative ...
Method of simulating rock mass stability in laboratory conditions using equivalent materials
(National Mining University, 2016-09-30)
Purpose. To determine the qualitative composition of the equivalent material of a laboratory model representing Kryvyi Rih iron-ore basin ground, as well as to develop a method to determine its quantitative composition for ...