A Charge Method for Improving Blasting Stability of Surrounding Weak Surrounding Rock

Abstract

The invention discloses a charging method for improving peripheral weak surrounding rock blasting stability. The method comprises the steps that each shot hole is filled with an explosive tube, then filled with a water glass bag and finally filled with an alums bag to form a first charging cycle, a second charging cycle can be formed based on the first charging cycle, and therefore multiple charging cycles can be formed. After all the charging cycles are completed, the shot holes are plugged by stemming, water glass and alums produce a mixture under the influences of explosive shock wave during blasting, some mixture is shocked to the weak surrounding rock peripheral face, the gaps of the peripheral weak surrounding rock is filled with the mixture, the mixture is solidified within a short time and has the certain strength after being solidified, in other words, the peripheral weak surrounding rock is sprayed with a layer of reinforcing materials, and therefore the peripheral weak surrounding rock blasting stability is improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of tunnel blasting construction, in particular to a charge method for improving the blasting stability of surrounding weak surrounding rocks. 【Background technique】 [0002] The weak surrounding rock itself is relatively broken, the joints are relatively developed, the cohesive force of the layer is small, and the degree of cementation is poor. During the blasting construction, it is easy to cause the surrounding rock in the arch to be affected, expand loose and fall off. The safety risk is high, and safety accidents such as landslides are prone to occur. Affect construction safety and progress. [0003] For the blasting construction of weak surrounding rocks, improving the charging method is one of the methods to improve the blasting stability. There is also a way to improve the blasting stability by using the interval uncoupled charging method, but the effect is not ideal. Other studies in this area are ...

AI Technical Summary

Problems solved by technology

[0002] The weak surrounding rock itself is relatively broken, the joints are relatively developed, the cohesive force of the layer is small, and the degree of cementation is poor. During the blasting construction, it is easy to cause the surrounding rock in the arch to be affected, expand loose and fall off. The safety risk is high, and safety accidents such as landslides are prone to occur. Affect construction safety and progress

[0003] For the blasting construction of weak surrounding rocks, improving the charging method is one of the methods to improve the blasting stability, and there is also a way to improve the blasting stability by uncoupling the charging method at intervals, but the effect is not ideal. No related reports

Images