(1Shandong University of Science and Technology, Tai’an 271019 China) (2Datuen Coal and Electricity Inc, Xuzhou 221611 China) (3Heilongjiang Institute of Science and Technology, Harbin 150027 China)
Abstract：In order to meet with the varied requirement of roadway support, the arc-terrace metallic support is newly developed. Aimed at its mechanical characteristics, the function of maximal supporting competence is derived by adopting the mechanical model of curved beam. The coefficient of supporting competence of arc-terrace metallic support is derived and analyzed based on the comparison of supporting competence between the arc-terrace metallic support and the terrace metallic support. For example cross-section of I-steel No.11, the corresponding supporting characteristics is derived by studying. The result demonstrates that the supporting competence of arc-terrace metallic support is much superiorer than terrace support. Its coefficient of supporting competence decrease accordingly with the upper beam radius increasing and increase accordingly with the upper beam span. increasing.
2003, Vol. 22 
