压柱脆坏引发的能量释放量与荷载效应的计算

CALCULATION ON ENERGY RELIEF AND LOAD EFFECT CAUSED BY BRITTLE FAILURE OF PRESSED POST

对压柱弱化阶段的压机－压柱系统的能量变化关系作了分析，得到压柱失稳破裂终止点位移、压柱脆坏时压机释放的弹性能和受到的惯性力以及压机最大动位移等表达式。借用高强度混凝土压柱的荷载－位移曲线表达式对这些脆坏力学量作了计算和数据分析，深化了对矿柱和煤矿巷壁、采场煤壁（片帮型）冲击地压及其冲击强度原因的认识。

During the weakened deformation stage of pressed opst. the energy variation relationship of press- pressed post system is analyzed. The expressions are obtained for the displacement of stopping point of pressed post with unstable failure, the elastic energy relief amount of press and the inertial force imposed on press with brittle failure of pressed post and the largest displacement of press. These mechanic parameters are calculated and analyzed by quoting the load-displacement expression of pressed concrete post with high strength. The deeper knowledge is obtained for rockburst and rockburst strength of pillar, alley wall of mining and coal wall of stope.