Optimization Study on Construction Technology of Large Section Tunnel Excavation
In order to improve the problems in the excavation construction technology of a large cross-section roadway in a certain mine,the excavation construction technology and support technology were optimized.After experimental use,the improved plan increased the excavation speed of the roadway to 6.7 m/d,a relative increase of 24%,reduced the collapse rate of the roof by about 20%,reduced the maintenance cost of the roadway excavation by about 102000 yuan,and improved the support efficiency.
NETL
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万方数据
