How many meters can a tunnel boring machine advance in a day? The working speed of a tunnel boring machine depends on various factors, including geological conditions, machine model and specifications, and operator skills. Generally, in favorable geological conditions, a tunnel boring machine can advance several tens to several hundred meters per day. However, progress may be limited in complex geological conditions. The specific progress is usually evaluated and planned by the construction unit according to the actual situation and project requirements. Below are the excavation speeds of different types of tunnel boring machines under normal conditions.

　　1. Small handheld drilling rigs: These machines are suitable for small-scale projects such as house construction and road maintenance. Their daily advance rate is generally around 10 meters.

　　2. Medium-sized machinery: Such as reverse circulation drilling rigs, hydraulic drilling rigs, etc., they perform well in medium-sized projects. The daily advance rate is between 30-50 meters.

　　3. Large machinery: For example, shield tunneling machines, which are mainly used in large-scale construction projects such as subways and tunnels. Their daily advance rate can reach over 100 meters, and even in ideal geological conditions, it can exceed 200 meters.