Until now, some studies showed that major source of ore-forming materials come from wallrock or upper mantle.
目前，有关研究认为此类矿床成矿物质主要来源于矿床的围岩或上地幔。
2
Monitoring shows that the tunnel wallrock is stable and the support is safe, which demonstrates it an effective method.
监测表明：隧道围岩处于稳定状态，支护受力处于安全状态，说明该方法行之有效。
3
At the same time, the reasonable estimate about the stability of wallrock and timbering parameter supplies designers and builders with the beneficial reference.