The critical damage point of the red-bed soft rock percolation phenomenon can be described as threshold. At present, there are insufficient theoretical and experimental studies on threshold rock. In combination with analysis, compression experiment numerical simulation, destruction studied in this paper. was obtained by constructing a renormalization group model Based mechanics theory, characte...

Rock boulders are typical features of the surfaces of many airless bodies, so the possibility of estimating their potential survival times may provide insights into the rates of surface-modification processes. As an opening point of this study we employ estimates of the survival times of meter-sized boulders on the surface of the Moon based on analysis of the spatial density of boulders on the ...

As a result of the analysis work on rock destruction by cutters milling machines, it was found that existing developments do not allow us to proceed derivation calculation d dependencies for determining fracture resistance, or can be used only in preliminary calculations known design parameters machines. To eliminate these disadvantages, combined physical and mathematical model process interact...

Introduction. Torsional vibrations caused by drilling using a polycrystalline diamond compact (PDC) bit are analysed wellbore data obtained under various modes. The torsional analysed. Two types of vibrations, including those the cutting action and frictional forces. Aim. To investigate induction as result rock destruction PDC bits. Materials methods. research methodology was based on “Richard-...

The object of research: the process development main cracks in massif rocks under action a wave impulse taking into account dynamic destruction resistance.
 Investigated problem: Description dynamics crack mode increasing their size, as well transition to an unstable growth.
 scientific results: In present article uses approach based on principle least and N-characteristic growth resi...

Aim of the project is efficiency increase of hard rocks destruction at borehole bottom by developing drilling mud solution and evaluation of its influence on drilling process. The article presents the results of studies directed on studying of drilling mud composition (the choice of reagent concentrations, taking into account the filtration properties, structural and rheological parameters, stu...