Abstract
1. A new model is suggested with simple techniques representing the dynamic behavior of an assembled support system at intersections of horizontal mine workings. Plastic behavior of the material at the conjugation points of structural elements is taken into account. 2. Equations systems are formulated to calculate the behavior of a support system sustaining static and dynamic rock pressures. 3. In case of a dynamic impact upon the support system at a conjugation, the greatest strength is attained when the rigidity of the external medium is higher than that of the medium filling the space between the support systems of the individual workings. 4. When a plane wave acts upon the support system at the conjugation, the internal support system removed from the wavefront at the initial time is especially susceptible to breakdown. 5. Support systems interact not only in terms of vibration amplitude but also vibration frequency and form. The influence of internal support systems upon the external support system is particularly strong.
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