Drilling and blasting is a traditional rock excavation method that uses a drill to drill holes in the rock mass, then loads explosives in the holes for blasting, and finally clears the gravel to achieve tunnel excavation. This method is widely used in mining, tunnel construction and other fields. Here are some advantages and disadvantages of drilling and blasting equipment:

  Advantages of drilling and blasting equipment:

   1. Wide range of applications: It can adapt to various geological conditions. Whether it is soft soil, hard rock or complex geological structure, drilling and blasting can be used for excavation.

   2. Relatively low cost: Especially in some cases where the geological conditions are complex and large-scale excavation equipment is difficult to use, the equipment investment and construction cost of drilling and blasting may be relatively low.

   3. High flexibility: For small, irregularly shaped tunnels or local construction areas, drilling and blasting is easier to adjust and adapt.

   4. Mature technology: Drilling and blasting has a long history and rich practical experience, and the technology is mature and stable.

   5. Easy to operate: For skilled operators, the operation of drilling and blasting is relatively simple and direct.

   Disadvantages of drilling and blasting excavation equipment:

   1. High construction safety risk: Blasting operations are dangerous, such as explosion accidents, flying rocks and injuries.

   2. Great impact on the surrounding environment: Blasting may cause ground vibration and noise, which will have an adverse impact on surrounding buildings and the ecological environment.

   3. Slow construction progress: Blasting, slag removal, support and other processes are relatively cumbersome, and the cycle operation time is long, resulting in a relatively slow overall construction progress.

   4. Dust and harmful gas emissions: A large amount of dust and harmful gases will be generated during drilling and blasting, which will pollute the health of construction workers and the environment.

   5. Over-excavation and under-excavation problems: Blasting control is difficult, and it is easy to over-excavate or under-excavate the tunnel contour line, increasing the workload and cost of subsequent processing.

   6. Accuracy limitation: The excavation accuracy of the drilling and blasting method is limited by the accuracy of drilling and blasting technology, and may not be as accurate as mechanical excavation equipment in controlling the shape and size of the tunnel.

   In general, drilling and blasting excavation equipment still has its application value under specific geological conditions and engineering requirements, but with the development of technology, more and more engineering projects tend to adopt more efficient, safer and more environmentally friendly excavation methods.