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大强煤矿主井井筒,采用伞钻打眼、大抓出岩、大模板支护的“三大”施工原则,于2009年创造了3个月超百米的施工业绩,为主井按期完工奠定了基础。
The main shaft of the Daqiang Mine uses the umbrella drilling to drill the eye and grasps the construction principle of “three big” for supporting rock and large formwork. In 2009, it created the construction performance of over 100 meters in three months, Completion laid the foundation.