What problems might a shaft boring machine encounter during tunneling? The following problems may arise during shaft boring machine operation:

   1. Complex geological conditions: Encountering hard rock, soft strata, fault fracture zones, etc., can affect tunneling efficiency and may even lead to equipment damage or jamming.

   2. Water inrush: Groundwater inrush may occur, increasing construction difficulty, affecting the working environment, and even threatening construction safety.

   3. Surrounding rock stability: Unstable surrounding rock may collapse, threatening equipment and personnel.

   4. Cutting tool wear: Cutting tools will wear down continuously during tunneling and need to be replaced promptly; otherwise, tunneling progress will be affected.

   5. Difficulty in muck removal: If muck cannot be removed effectively and promptly, it may block the working face.

   6. Equipment failure: Various mechanical and electrical failures may occur, leading to tunneling interruptions.

   7. Shaft deviation: During construction, the shaft may not be vertical, causing deviations exceeding the allowable range.

   8. Ventilation Issues: As the shaft depth increases, ventilation becomes more challenging, potentially affecting underground air quality.

   To address these issues, thorough preliminary surveys, scientific construction design, and rational construction organization are essential during construction. Experienced personnel and advanced equipment are also crucial. Strict adherence to construction specifications and safety standards is paramount to ensure smooth tunneling operations and construction safety.