Based on the objective existence of large horizontal stress and much engineering practice, a new principle of rock bolts support design----roof rigid beam principle, is put forward in the paper, which put moreemphases on influences of stability of coal mine roadways by a high pretensioned rock bolt system. According to the new principle, a series of large-scale universal models of computer automated finite element analysis for fast mine design are established and the preloading and the spacing of rock bolts...
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