Karst landform tunnel energy-gathered water pressure smooth blasting structure and method

A technology of smooth blasting and karst, which is applied in blasting, tunneling, earthwork drilling and mining, etc. It can solve the problems of insufficient safety, too dense holes in smooth blasting, and high construction costs, so as to reduce labor force, improve economic benefits, The effect of speeding up the construction progress
CN112943262APending Publication Date: 2021-06-11WUHAN ENGINEERING CO LTD OF CHINA RAILWAY SEVENTH GROUP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN ENGINEERING CO LTD OF CHINA RAILWAY SEVENTH GROUP
Publication Date
2021-06-11

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Abstract

The invention discloses a karst landform tunnel energy-gathered water pressure smooth blasting structure and method. The karst landform tunnel energy-gathered water pressure smooth blasting structure comprises cut holes, auxiliary holes, peripheral holes and bottom plate holes; the cut holes are symmetrically formed in the two sides of the center line of a tunnel; the auxiliary holes are formed in the sides, away from the center line of the tunnel, of the cut holes; the peripheral holes are formed in the sides, away from the center line of the tunnel, of the auxiliary holes; and the bottom plate holes are formed in the bottom of the section of the tunnel. According to the karst landform tunnel energy-gathered water pressure smooth blasting structure and method, the number and depth of smooth blasting shot holes are remarkably reduced, so that the construction progress is accelerated, and the shot hole utilization rate is increased; back break is directly and effectively controlled, the labor force of workers is reduced fundamentally, the economic benefits are remarkably increased, and subsequent construction is reliably guaranteed; and meanwhile, energy-gathered water pressure smooth blasting is beneficial to remarkably reducing surrounding rock disturbance, and the stability and construction safety of surrounding rock are guaranteed.
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Description

technical field

[0001] The invention relates to the technical field of blasting, in particular to an energy-gathering hydraulic pressure smooth surface blasting structure and method of a karst landform tunnel. Background technique

[0002] In today's China, blasting safety has been improved qualitatively from the previous hot blast and electric blast to the current nonel. In the construction of tunnels, the drill and blast method has played an irreplaceable role. Compared with ordinary blasting, the molding quality and safety of smooth blasting have been greatly improved. However, the disadvantages of conventional smooth blasting are: the distance between the blasting holes is 50 cm, the holes are too dense, too many holes are drilled, and the drilling operation takes too long; Caves affect the stability of the surrounding rock, and even cause landslides; over-excavation often occurs, increasing the amount of concrete lining increases construction costs. With the continuou...

Claims

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