Sandy slate tunnel construction method

Abstract

The invention discloses a sandy slate tunnel construction method. The sandy slate tunnel construction method comprises the following steps: (1) measuring is performed; (2) leveling of a field is carried out; (3) hole distribution is performed; (4) hole drilling is performed; (5) charging is performed; (6) blast holes are blocked; (7) detonating network connection is performed: the detonator section and detonating network connection mode is executed according to a blasting design scheme; (8) safety alert is performed; (9) checking is performed after explosion; (10) blind shot treatment is carried out; (11) secondary crushing is performed; (12) water pressure smooth blasting control is performed; (13) dangerous rocks on the excavation surface are cleaned; and (14) the excavation quality is inspected, and if the excavation quality is qualified, the smooth blasting process is ended. By the method, the problems that the operation space is limited, and a good slotting effect is obtained through a small number of shot holes and the minimum explosive unit consumption can be solved, the purposes that the method is easy and convenient to operate, wide in application range and good in operation precision effect are finally achieved, the smooth blasting quality and the construction progress are effectively improved, and the construction cost is reduced. According to the method, the smoothblasting excavation technology of a sandy slate tunnel is perfected, the construction period is shortened, the construction cost is reduced, a good smooth blasting effect is achieved, and obvious economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the field of tunnel construction, and specifically designs a sandy slate tunnel construction method. Background technique [0002] The drilling and blasting method is mainly used in tunnel construction in China, and other construction methods are also used in actual tunnel construction, such as: ① open cut method; ② semi open cut method, cover slab method or cover excavation (reverse work) method ; ③ underground digging method, etc. However, the application of these construction methods is not unique. In order to ensure the safe and smooth implementation of the construction plan, it must be coordinated and implemented in conjunction with certain auxiliary construction measures. [0003] In China, the supporting modes of construction machinery for long and single-track railway tunnels mainly include the following types: ① tracked full-section excavation mode; ② trackless full-section excavation mode; Step construction, that is...

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Problems solved by technology

[0004] As for the construction method of the sandy slate tunnel, since the sandy slate tunnel passes through mountains and steep terrain, the terrain is narrow and long, and the occurrence of rockbursts mostly occurs in places with deep burial, good lithology, and large ground stress. In deep underground projects, it has the characteristics of hysteresis, continuity, attenuation, suddenness, and violence. It not only damages engineering equipment and affects construction progress, but also seriously threatens the personal safety of construction personnel, and even causes the failure of the entire project in severe cases. , the occurrence of rockburst disasters has seriously restricted the smooth progress of deep engineering

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