drilling and blasting method

Addressing the safety and efficiency challenges encountered during construction of the dual tubeꎬ eight lane ultra large cross section Chengzai Mountain highway tunnel on the Shenzhen Shanwei West Expressway. this paper presents a systematic investigation into the key technologies for fully

Tunnel engineering is an important part of transportation, energy, water conservancy and other infrastructure construction, and its construction efficiency directly affects the engineering progress and cost. The traditional drilling and blasting method has problems such as large amount of

With the improvement of science, technology, and economic conditions, the level of mechanization in tunnel construction in China continues to rise. In tunnel construction, the development of fully mechanized construction is a new direction for future tunnel construction, using fully mechanized

Based on the application status of rock-drilling jumbo， in order to solve the problem of large average linear overbreak amount when drilling and blasting with rock-drilling jumbo， the section of grade Ⅲ surrounding rock (DK23 +075—DK23 + 155) at the left tunnel entrance of Taixingshan tunnel

In order to apply mechanized drilling and blasting method for large-section tunnel construction in weak surrounding rocks， construction technologies of rock drilling and arch installation were studied based on Laifu tunnel of Chongqing-Kunming high speed railway. Through the renovation of the

To resolve the problems of single⁃purpose, low construction efficiency, and low mechanization of the drilling and perforation equipment of blasting methods for medium and large diameter shafts, the ZYL89 vertical shaft drilling rig was designed and developed, based on the technical characteristics

The rock drilling trolley is a piece of typical mechanical equipment for tunnel construction. For the hard and complete surrounding rock conditions, the rock drilling trolley has high speed, low unit energy consumption, fewer employees, high safety and good blasting quality, which is the main

For development of large equipment，such as drill jumbos，digitalization and intelligence are the trends in future. In order to clarify the research direction of the self-developed drill jumbo，combined with the current status of the drill jumbos applied in China's underground mine，where the drilling

The article takes the Zhengwan high-speed railway 9 standard project as an example. This project successfully applied 10 three-arm rock drilling rigs for drilling and blasting excavation, especially in the exit section of Xingshan tunnel, and successfully applied to large sections of Ⅳ and Ⅴ