safety pillar中文什么意思

保安矿柱

• safety:    n. 1.安全；平安，稳安，保险。 ...
• pillar:    n. 1.柱；纪念柱；(柱)墩，柱脚 ...
• shaft safety pillar:    井筒保安矿柱

例句与用法

1. No safety pillars shall be mined without authorization and no dangerous methods , such as water bursting , blasting and breaking through roadways , which may threaten the production safety of adjacent coal mines shall be adopted
   采矿作业不得擅自开采保安煤柱，不得采用可能危及相邻煤矿生产安全的决水、爆破、贯通巷道等危险方法。