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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

Pending Publication Date: 2021-06-11
WUHAN ENGINEERING CO LTD OF CHINA RAILWAY SEVENTH GROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, it is necessary to provide a structure and method for energy-gathering water pressure smooth blasting of karst landform tunnels to solve the technical problems of smooth blasting with too dense holes, high construction costs, and insufficient safety in the prior art

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

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Embodiment 1

[0036] This embodiment provides a karst landform tunnel energy-concentrating water pressure smooth surface blasting structure, including a cut hole 101, an auxiliary hole 102, a peripheral hole 103 and a floor hole 104; wherein,

[0037] Cutting eyes 101 are symmetrically arranged on both sides of the tunnel center line 100, the side of the cut hole 101 away from the tunnel center line 100 is provided with an auxiliary eye 102, and the side of the auxiliary eye 102 far away from the tunnel center line 100 is provided with a peripheral eye 103; the bottom plate eye 104 is provided at the bottom of the tunnel section. The specific setting parameters are shown in Table 1.

[0038] Table 1 Parameters of blastholes with concentrated energy water pressure light explosion on steps

[0039] pop eye depth m angle Spacing cm Number Cutout 2.8 70° / 12 auxiliary eye 2.6 90° 80-90 62 peripheral eye 2.6 85° 100 22 Bottom hole 2.6 87° 10...

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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.

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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Application Information

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IPC IPC(8): E21D9/00E21D9/04F42D1/00
CPCE21D9/006E21D9/04F42D1/00
Inventor 程畅赵连富赵飞刘文军张奥刘洋黎杨陈祥张海林
Owner WUHAN ENGINEERING CO LTD OF CHINA RAILWAY SEVENTH GROUP
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