Abstract
In order to clearly grasp the influence rules of the coal gangue volume mixture ratio on the system contact response, and finally realize the coal gangue mixing ratio recognition according to the contact response differences, on the basis of the Hertz contact theory and Flores nonlinear spring-damping contact theory, this paper proposed and established the theoretical model when multiple coal gangue particles elastic impacting the metal plate for the first time simultaneously in an undisturbed way with the consideration of the particles micro-compression, the macro-deflection of the metal plate and the functional transformation of the system. To further study the system response, the simulation when multiple coal gangue particles with the variable mixing ratio impacting the metal plate was carried out with consideration of the coal gangue brittleness and the elastic-plastic of metal plate. Then, broken response of coal gangue particles and the contact response of the metal plate under the different coal gangue mixing ratios were studied. After that, EMD decomposition and time-frequency domain parameters calculation were conducted for the vibration acceleration signal of the metal plate, and the influence law of gangue mixing ratio on the vibration acceleration signal time-frequency domain parameters of the metal plate was obtained. Finally, in line accordance with the self-proposed data standardization processing method, Kalman filtering, multi-information fusion method as well as the simulation data, the recognition of coal gangue mixture ratio based on the vibration acceleration signal multi-time-frequency domain parameter fusion and the recognition of coal gangue mixture ratio based on the metal plate multi-response information fusion were marched respectively, and the coal gangue mixture ratio multi-dimension recognition strategy based on Kalman filter and the energy fusion is proposed. The research results show that the proposed recognition method can greatly improve the recognition rate and the applicability of the identification strategy.
Highlights
Coal is the important source of energy and fuel, which it’s mining technology is closely related to the social andThe associate editor coordinating the review of this manuscript and approving it for publication was Hamid Mohammad-Sedighi .economic development
Yang et al.: Influence of Coal Gangue Volume Mixing Ratio on the System Contact Response rock and a large number of coal gangue particles, as shown in Figure 1, together with the shearer and scraper, they constitutes a fully mechanized caving mining process which is composed of mining, supporting and transportation in the underground coal mining space [5]
Based on the previous research results and the research shortages of the single particle, group particle and coal gangue recognition, in order to comprehensively grasp the contact response law when multiple coal gangue particles impacting the metal plate, and realize the identification of multiple coal gangue particles mixing ratio, this paper referring to the research method of the previous contact problem [34]–[40], on the basis of the Hertz contact theory and the Flores contact model, considering the medium compression and the deformation of the metal plate, proposes the theoretical model when the multiple coal gangue particles simultaneously undisturbed elastic impacting the metal plate in the first time under four different working conditions
Summary
Coal is the important source of energy and fuel, which it’s mining technology is closely related to the social and. Based on the previous research results and the research shortages of the single particle, group particle and coal gangue recognition, in order to comprehensively grasp the contact response law when multiple coal gangue particles impacting the metal plate, and realize the identification of multiple coal gangue particles mixing ratio, this paper referring to the research method of the previous contact problem [34]–[40], on the basis of the Hertz contact theory and the Flores contact model, considering the medium compression and the deformation of the metal plate, proposes the theoretical model when the multiple coal gangue particles simultaneously undisturbed elastic impacting the metal plate in the first time under four different working conditions. Δ is the instantaneous velocity of the sphere and δ is the initial velocity, e is the restitution coefficient
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