## 1 Introduction  
Western China is experiencing an increase in railways, highways and other transportation facilities with the adoption of western development policies. Due to the geographical characteristics of the region, the construction of these facilities will inevitably lead to cross tunnels and parallel tunnels with small clearance and other situations. At present, the most widely used is the New Austrian Tunneling Method (NATM), in which blasting construction will inevitably affect the safety and usability of the advance tunnel. Therefore, the research team analyzed the impact of blasting shock and vibration on the adjacent steel fiber tunnel lining through numerical simulation [1, 2, 3]. Remarkable results have been made on the blasting construction of nearby tunnels. [PERSON] and [PERSON] [4] studied the mechanical properties of fiber-reinforced concrete shield segments, and obtained that the bending, yield, and ultimate bending moment of the segments with fiber are significantly higher than those of ordinary segments under the same reinforcement ratio. [PERSON] et al. [5] simulated the pure steel fiber segment of a hard rock tunnel through FLAC3D, and conducted field tests in Qingdao Metro Line 1. The result showed that the pure steel fiber concrete segment has better crack resistance, and it is feasible to replace steel. [PERSON] et al. [6] also adopted FLAC3D in Hangzhou Metro Line 5 to analyze the blasting vibration in the excavation of small clear-distance tunnels to the support of the adjacent tunnel in an urban area. In the Aiminshan Tunnel in Dandong, Liaoning Province, [PERSON] et al. [7] used ANSYS to analyze the seismic impact of blasting excavation on the surface and concluded that the cavity effect caused the excavated surface to vibrate more quickly than the unexcavated surface. [PERSON] et al. [PERSON] et al. (2018) adopted field monitoring and software simulation to study the influence of blasting from the rear tunnel on the structural optimization of the secondary lining of the advance tunnel under soft and broken surrounding rocks in the Xinmin Tunnel. [PERSON] et al. [PERSON] et al. (2019) used the numerical model to analyze the construction sequence, the time and method of secondary lining in three parallel tunnels with the middle one constructed first, as well as the impact of blasting the tunnels on both sides of the secondary lining of the middle tunnel in the parallel section of the Sunjiawan Tunnel 1 on the Yongzhou Highway and the Niupilingxia Tunnel on the Yongzhou Railway. [PERSON] et al. [PERSON] et al. (2019) studied the dynamic response characteristics of the blasting from the adjacent tunnel on the lining structure at the intersection of the first tunnel in the intersection of the Wuwu high-speed railway tunnel and Xizengshan highway tunnel, and concluded that the arch shoulder and crown of the first tunnel are sensitive to blasting stress, and that close attention should be paid during construction. [PERSON] and Ren [PERSON] and [PERSON] (2019) used ABAQUS to study the stress response of the first tunnel to the blasting of the rear tunnel in the small clear-distance tunnel, and concluded that the inner arch waist and the foot are most affected and deserve further observation. [PERSON] et al. [PERSON] et al. (2019) used LS-DYNA and field tests to study the rule of tunnel failure under the blasting load of adjacent tunnels with different spacings, and obtained the form of the failure and the location of the crack. [PERSON] et al. (2019) observed the on-site expansion project of the Fuzhou Mawei Tunnel, and studied the attenuation characteristics of the velocity of the vibration energy under multiple cavities. [PERSON] et al. [PERSON] et al. (2019) tested on site the in situ expansion project of the Jinjishan Tunnel on the Second Ring Road in Fuzhou, Fujian Province, and concluded that in the blasting construction, the number of explosives used in the cut hole should be appropriately reduced, and increased in the wide slot hole and auxiliary hole. [PERSON] et al. [PERSON] et al.