The dissertation is devoted to solution of mining wagon stability problem while interaction with rail track, which obtains physical irregularities. Owing to surviour mining environment, rail track characteristics has extreme imperfections in all directions. This causes an additional dynamical stress on each members of a chassis. As a result, the distinguish feature of mine wagon exploitation is large amount of derailments. Basing on the study of domestic organizations, the quantity of wagons' derailment occurs 12 times more frequent in comparison with locomotives. Therefore, there are two ways to solve such problem. First one is aimed to improve rail track characteristics. But the problem consists of the lack of funds and impossibility to stop the fast-changing shaft geometry, which is caused by overburden stress. The second way needs the development of a new wagon design, which will compensate the track irregularities. Therefore, an innovative axle-box is proposed, which allows increasing safety factor of mining wagon both on straight and curvilinear tracks. It is possible owing to additional kinematical moveability of ongoing front wheel that decreases angle of attack. For this matter, each wheel has extra degree of freedom. The necessity of additional moveability is obvious in automobile conception. The similar concept but for each will is reflected in mining wagons chassis. A calculation scheme of mining wagon with additional angular moveability of ongoing wheel is developed. According to calculation scheme a mathematical model, which consists of 16 differential equations of the 2nd order that have been obtained by Lagrange equation of 2nd kind, are developed. The model is solved by numerical method. In order to varify the results, an additional mathematical model in "Universal mechanism" is developed. Through mathematical simulation we have obtained the numerical characteristics of wagon drive along the rail track, which characteristics corresponds the existing track of mine "Stepnaya" DTEK Pavlogradugol'. Theoretical results verification were provided on the similar track on the ground facilities, using wagon ВГ-3,3-900 type and accumulator ground locomotive. Therefore, we have proved the statement, that additional moveability of wheel is not lack of design or result of wear - it is feature of safety factor improvement, if the moveability predicted by design. An influence of the track irregularities on dynamic stress loading and on safety factor is studied. It is proven, that additional wheel's moveability causes increase of safety factor up to 20 %. Cut off the unsprang masses provides decrease of vertical dynamical stress loads to 10 %. The stress-strain state of axle-box under high dynamic stress is studied by Ansys. The load, which applied on the axle-box correspond the existing dynamical stress, that have been studied through mathematical simulation. Analysis of finite-element nomograms shows, that maximal principal stress of the axle-box members does not exceed 68 MPa. Maximal lifetime arises on spheres and cone bushings. The elastic-dissipative elements on the wheel center provides the dynamical stress reduction, but total deformation of the unit does not cause the angular displacement of the wheel. The displacement arises in the cone bushings. The contact stress problem of chassis elements is solved using the Herzian theory of contact stress. Substantiated, that principal stress in the pair wheel-cone bushing does not exceeds. To obtain necessary motion parameters, an area of rational parameters for bushings and spheres, elastic-dissipative units of mine wagon are defined. Thus, the rational parameters guarantee both high lifetime of contact pairs and rational degree of wheel displacement. The developed design of the axle-box is implemented at "DZSM" LLC, where it exploits, and several industrial organizations, where the calculation methodics are used for mining wagon design and production. Several calculation methodics and recommendations are developed.
