Research on Effects of Underground Roadway Arrangements for Surround Rock Bearing Capacity

Abstract

Through the mould contrasting experiments the carrying capacities and deformation effects of surround rock with different underground roadway arrangements are studied in this paper. On the basis of experiment measuring results the bearing capacities and strains of surround rock moulds in different stratum roadways and arrangement positions are obtained. It is shown that underground roadway positions in weak rock stratum can bring about more decrease in surround rock bearing capacities and the positions below weak stratum can have high bearing capacity under the high ground pressure actions. The roadway horizontal space enlarging one times may increase more 25% bearing capacities of surround rock for rock or weak stratum roadway. The dislocation arrangements of roof roadway with below weak stratum roadway can improve about 41.5% bearing effects and have a little deformation of surround rock. The research conclusions are important significance of conducting for reasonable designing underground roadway engineering.