Air pressure blasting device used for simulating excavation with tunnel drill blasting method

Abstract

The invention relates to an air pressure blasting device used for simulating evaluation with a tunnel drill blasting method. The air pressure blasting device comprises a self-boosting liquid nitrogen container, a control panel and two blasting-pipe modules, two SMC high-pressure pressure switches and a control module are arranged in the control panel, the control module is connected with the SMC high-pressure pressure switches respectively through a circuit to control opening and closing of the SMC high-pressure pressure switches, the air outlet of the self-boosting liquid nitrogen container is connected with the SMC high-pressure pressure switches respectively through a high-pressure hose, the SMC high-pressure pressure switches are respectively communicated with the blasting-pipe modules through the high-pressure hose, and air blasting holes are formed in the blasting-pipe modules. The air pressure blasting device has the advantages of simpleness in structure and convenience in use, construction procedure of evaluation with the tunnel drill blasting method can be accurately simulated, simpleness in operation is achieved, safety and reliability in tunnel simulation test process is guaranteed, and the air pressure blasting device can be widely used in similar simulation test of various small-equivalent tunnel blasting excavation.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics model test equipment, and in particular relates to a pneumatic blasting device for simulating tunnel excavation by drilling and blasting. Background technique [0002] So far, there are seven tunnels with a length of more than 10km that have been built or are being built in my country. Due to the long distance and complex geological conditions, the drilling and blasting method has the advantages of low investment, compact equipment, adaptability to various geological conditions, fast, maneuverable and flexible, so most of these tunnels are constructed using the traditional drilling and blasting method. Starting from the actual situation in our country, the drilling and blasting method will still be the mainstream of tunnel construction in our country for a long time to come. Therefore, it is of great scientific value and practical significance to continuously improve the drilling and blast...

AI Technical Summary

Problems solved by technology

There are relatively few similar simulation studies on drilling and blasting excavation at home and abroad. The main method is to use small-yield blasting. However, the preparation of small-yield explosives is difficult to achieve. There is no basis for similar indicators, and blasting experiments are very dangerous.

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