【摘要】 根据支承压力在煤柱上的分布规律 ,考虑到煤岩类介质的屈服受体积应力的影响 ,运用广义米赛斯准则推导出了煤柱中部弹性区的临界宽度公式 ,并通过实例验证了前人留设的宽度 ( 2 M)大于临界宽度 ,证明这一经验性结论是正确的更多还原

【Abstract】 According to distributive regulation of abutment pressure on the coal pillar, and it is considered to be influence of coal and rock medium yielded with the volume stress, the critical wide formulation of middle elastic area of coal pillar is deduced out by the broad Mises criterion, and with practical example to verify the our predecessors to design the coal pillar width (2M) is more than the critical width of this text. This experienced conclusion to be proved is right.更多还原