Take the Shuangyashan mining bureau east nine to picking zone the working surface as the object of study the third coal mine of Dongrong, carries on the tunnel picking zone monitor design.
以双鸭山矿务局东荣三矿东九采区综采工作面为研究对象，进行采区巷道监测设计。
Take the Shuangyashan mining bureau east nine to picking zone the working surface as the object of study the third coal mine of Dongrong, carries on the tunnel picking zone monitor design.
以双鸭山矿务局东荣三矿东九采区综采工作面为研究对象，进行采区巷道监测设计。
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