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立井井筒是矿井建设的关键工程,在开采深度日益增加、开凿条件日趋复杂的情况下,其工期在矿井建设总工期中的比重也相应增加。因此,加快井筒开凿速度,对缩短建井总工期,具有重要的现实意义。
Vertical shaft is a key project of mine construction. With the increasing exploitation depth and the increasingly complicated cutting conditions, the proportion of the construction period in the total mine construction period also increases accordingly. Therefore, speeding up the wellbore excavation speed has the important practical significance to shorten the total construction period of well construction.