Experimental Study on Stability of the-877 m Stope of Hongtoushan Copper-Zinc Mine
An experimental study on the stability of the-877 m stope of the Hongtoushan copper-zinc mine was conducted through ore-rock mechanical strength testing and engineering geological surveys,focusing on analyzing the ore-rock quality evaluation re-sults and the calculation results of the hydraulic radius of the stope roof.The research results show that the evaluation results of ore rock quality under the RMR method and Q method are all good.The critical hydraulic radius of the ore stable zone is 6.9 m calcu-lated through the Mathews stability diagram method.When the span of the ore roof in a single mining area does not exceed 15 m,the hydraulic radius of the ore is less than 6.9 m.When the span of the ore roof in the panel area does not exceed 14 m,the hydrau-lic radius of the ore is less than 6.9 m.At this time,the stope is in a stable state and does not require support.
-877 m experimental stopeore-srock quality evaluationmathews stability diagram methodhydraulic radius
万方数据
