Мақола

Studies of the Stress–Strain State of Rocks Under the Impact of Penetrators of Various Configurations Using the Ansys Software Package

J.B. ToshovDepartment of Mining Electromechanics, Tashkent State Technical University, Olmazor District, University Str. 2, Tashkent 100095, UzbekistanКарибек ШеровDepartment of Technological Machines and Equipment, Saken Seifullin Kazakh Agrotechnical Research University, Astana 010000, KazakhstanBuri ToshovDepartment of Engineering Mechanics, Navoiy University of Mining and Technology, Galaba Str. 76b, Navoiy 210100, UzbekistanAsylkhan MazdubayDepartment of Mechanics and Oil and Gas Engineering, Toraighyrov University, Lomov Str. 64, Pavlodar 140008, KazakhstanKhojiakbar NakhangovDepartment of Mining, Almalyk Branch of NUST MISIS, Amir Temur Avenue, 56, Almalyk 110105, UzbekistanBakhtiyor BaratovDepartment of Mining, Almalyk Branch of NUST MISIS, Amir Temur Avenue, 56, Almalyk 110105, UzbekistanSauatbek KardybayDepartment of Technological Machines and Equipment, Saken Seifullin Kazakh Agrotechnical Research University, Astana 010000, KazakhstanA. EsirkepovDepartment of Technological Machines and Equipment, Saken Seifullin Kazakh Agrotechnical Research University, Astana 010000, KazakhstanKhamit TemirtasDepartment of Mechanics and Oil and Gas Engineering, Toraighyrov University, Lomov Str. 64, Pavlodar 140008, Kazakhstan

Applied Sciencesjournal2026en

ABI

Аннотация

This study investigates the stress–strain state of rocks subjected to the impact of penetrators with diverse configurations, employing numerical simulations in the ANSYS Workbench Static Structural module. The research focuses on the interaction between roller cone drill bit teeth and rock formations during blast hole drilling. Through finite element modeling using a linear elastic constitutive model, the influence of penetrator geometry, position relative to borehole walls, angle of attack, and distance to open surfaces on rock fracture parameters is analyzed. Key quantitative findings include: the relative breaking force near the borehole wall reaches 2.8 for soft rocks (siltstones) with a 10 mm tooth diameter, and decreases to approximately 1.0 at a distance of 1.5d from the wall; the optimal angle of attack ranges from 60° to 90° depending on rock hardness; and the proximity to a free surface reduces fracture resistance to as low as 0.23 of the baseline value. Six sets of parabolic regression equations (R2 > 0.95) are derived for relative breaking forces across three rock hardness groups and two tooth diameters. Optimal parameters for tooth placement, borehole bottom shapes, and operational conditions are proposed. Implementation of the recommended parameters is estimated to increase drilling efficiency by 10–20% and extend tool service life by 15–30%. The findings provide a scientific foundation for designing advanced roller cone drill bits suitable for rocks with Protodyakonov hardness indices ranging from f = 5 to f = 18.

Ҳали таржима қилинмаган

Мавзулар

Geotechnical and Geomechanical Engineering High-Velocity Impact and Material Behavior Rock Mechanics and Modeling

Идентификаторлар

DOI: 10.3390/app16094323

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