rock drilling trolley

After excavation and blasting, tunnels constructed by drilling and blasting often have large over-excavation and difficult to control. In this regard, the impact of over-excavation on tunnel construction and the reasons for over-excavation are deeply analyzed, and combined with the existing

In view of the fact that the length of the hydraulic telescopic parallel boom of the traditional double-arm rock drilling rig can not meet the construction requirements of different excavation methods of large-section tunnels and is prone to the phenomenon of stuck drilling, and at the same time

Based on the Jinyun Mountain Tunnel project of the Chongqing-Kunming high speed railway Chongqing-Yibin section， this paper explored the key technologies and equipment for mechanized construction. The results show that the improved three arm rock drilling trolley can adapt to the conversion of

This paper combines the construction characteristics of pumped storage power station tunnels and the actual needs of the ventilation safety tunnel excavation project of Luoning Pumped Storage Power Station, innovatively designs a new type of rock drilling safety protection trolley, puts forward

In the field of specialized equipment for tunnel construction, the stable operation of rock drilling trolleys is an important factor affecting the progress of tunnel construction.The hydraulic system of the rock drilling trolley supports the operation of the entire equipment,and the failure of the

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