Research on Random Property of Impact Force for Flying Gangue in Steeply Dipping Seam Mining

Aimed at the random problems of shock motion of flying gangue in steeply dipping seam mining, based on the spherical flying gangue collision model, computational formula of the maximum impact in normal was established when flying gangue shocks bottom plate of mining face according to the theory of Hertz classical elastic collision; Considering the influences of the randomness of the density ,radius size, impact velocity about flying gangue, and the parameter such as the elastic modulus, Poisson’s ratio of contact bottom plate of mining face, the calculation model of shock motion of flying gangue with stochastic parameter was constructed by applying the random factor method; and the mean value and the variance of the maximum impact in normal were derived by using the algebra synthesis method. The numerical examples show that the randomness of parameters has a rather large influence on the maximum impact in normal of flying gangue in steeply dipping seam mining.