At Fengshan copper mine,the stability of ore and rock was poor and varied, and the stopes were located under the steep slope of high mountain, where the high stress was concentrated.

 
  • 丰山铜矿矿岩稳固性差,变化较大,且采场位于高山陡坡之下,属于高应力集中区,巷道支护困难。
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