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武钢金山店铁矿粗破碎机硐室为一个特大断面硐工程室,原设计为现浇混凝土衬砌,后改为喷锚网联合支护,由于支护方法得当,仅用180天便完成全部硐室的开挖与支护工作。采用喷锚支护与原设计现浇混凝土衬砌相比,工程投资降低50％以上,缩短工期三个多月,节约木材100％。该硐室工程是国内最早采用喷锚支护的大型硐室,现经十多年的生产实践考验,并未发现有脱落、开裂等异常现象,使用情况良好,它的应用成功为以后在类似工程中的推广应用提供了新的经验。 一、工程地质概况 粗破碎机硐室在主井井筒北面,距井筒
The Wushan Jinshandian iron ore coarse crusher chamber is an extra-large section tunnel engineering room originally designed for cast-in-place concrete lining and later combined with spray-anchor combined support. Since the supporting method is proper, it only takes 180 days to complete all the tunnels Room excavation and support work. Compared with the original design of cast-in-situ concrete lining, the project investment is reduced by 50% or more, the construction period is shortened by more than three months, and the wood is saved by 100%. The chamber project is the earliest use of spray anchor supporting large chamber, after more than 10 years of production practice test, did not find shedding, cracking and other anomalies, the use of good, and its successful application for later in a similar The popularization and application in the project provided a new experience. First, the engineering geological overview coarse crusher chamber in the north of the main shaft, away from the wellbore