Tunnel excavation water pressure blasting construction method

A technology of hydraulic blasting and tunnel excavation, which is applied in blasting, tunneling, earthwork drilling and mining, etc. It can solve the problems of polluting the environment and failing to make full use of explosives, so as to improve economic benefits, improve the construction environment in the cave, and blasting effects Good results

Inactive Publication Date: 2019-02-22
GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the technical problems that the conventional blasting method in the prior art cannot make full use of explosive energy and seriously pollutes the environment, and provides a tunnel excavation hydraulic blasting construction method

Method used

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  • Tunnel excavation water pressure blasting construction method
  • Tunnel excavation water pressure blasting construction method
  • Tunnel excavation water pressure blasting construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as figure 1 As shown, the tunnel excavation hydraulic blasting construction method includes the following steps:

[0047](1) The trolley is in place and the risk is removed

[0048] After the upper cycle construction is completed, the excavation jumbo is first put in place, and then the loose dangerous stones are manually cleaned to ensure the safety of the construction process;

[0049] (2) Measuring cloth holes and drilling holes

[0050] Such as image 3 As shown, use the total station to accurately determine the excavation contour line, the peripheral eye 4-1 and the position of the cutting eye 4-2 on the face, and use the contour line to determine the expansion hole 4-5, auxiliary The position of eye 4-3, inner ring eye 4-6, bottom plate eye 4-4; auxiliary eye 4-3 position; the drilling holes are divided and fixed, and the drilling is carried out strictly according to the hole position, and the hole positions are distributed on the palm surface at intervals...

Embodiment 2

[0072] Such as figure 1 As shown, the tunnel excavation hydraulic blasting construction method includes the following steps:

[0073] (1) trolley in place and risk removal are the same as in embodiment 1

[0074] (2) Measuring cloth eye and drilling is the same as embodiment 1

[0075] (3) Install explosives, water bags and gun mud

[0076] Such as figure 2 As shown, before installing explosives 1-2, use PVC pipe through holes to confirm that the hole depth meets the requirements;

[0077] Peripheral hole 4-1 is excavated to set the arc periphery of tunnel face, and peripheral hole 4-1 adopts the following method to install explosives 1-2, water bag 1-1 and gun mud 1-3: Put into a water-saving bag 1-1, then install the explosive 1-2 with a wooden pole, and the peripheral eye 4-1 adopts air-spaced, uncoupled charge, and the amount of charge in the fundus part is higher than that in other parts; The orifice is 80cm, then put 2 water-saving bags 1-1, and then use the gun mu...

Embodiment 3

[0089] Such as figure 1 As shown, the tunnel excavation hydraulic blasting construction method includes the following steps:

[0090] (1) trolley in place and risk removal are the same as in embodiment 1

[0091] (2) Measuring cloth eye and drilling is the same as embodiment 1

[0092] (3) Install explosives, water bags and gun mud

[0093] Such as figure 2 As shown, before installing explosives 1-2, use PVC pipe through holes to confirm that the hole depth meets the requirements;

[0094] Peripheral hole 4-1 is excavated to set the arc periphery of tunnel face, and peripheral hole 4-1 adopts the following method to install explosives 1-2, water bag 1-1 and gun mud 1-3: Put into a water-saving bag 1-1, then install the explosive 1-2 with a wooden pole, and the peripheral eye 4-1 adopts air-spaced, uncoupled charge, and the amount of charge in the fundus part is higher than that in other parts; The orifice is 80cm, then put 2 water-saving bags 1-1, and then use the gun mu...

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Abstract

The invention discloses a tunnel excavation water pressure blasting construction method. The tunnel excavation water pressure blasting construction method comprises the following steps of (1) arranging a trolley in place and conducting danger elimination; (2) measuring, distributing and drilling holes; (3) installing explosives, water bags and stemming, wherein the peripheral holes are excavated on the arc edge of the tunnel face of a tunnel, and the explosives, the water bags and stemming are installed in the following manners of air spacing, decoupling charge and the explosive quantity at hole bottoms more than that of other parts; cut holes are drilled in an inclined mode, and the included angle between the cut holes and the excavation face is 65 degrees-75 degrees; the continuous coupling charge method is adopted for loosening holes, relief holes, inner ring holes and bottom plate holes, blasting caps are buried into hole bottom cartridges, and energy gathering holes face orifices;the water bags are arranged at the hole bottoms of shot holes, and the water bags are arranged again after completion of explosive charging, and the holes are blocked through the stemming; (4) detonating a detonating network; (5) conducting after-detonation check and misfire processing; and (6) withdrawing the explosives to the warehouse. Through the tunnel excavation water pressure blasting construction method, the energy of explosives can be made full use of, environmental pollution can be reduced, and the cost can be saved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel excavation hydraulic blasting construction method. Background technique [0002] In the tunnel blasting construction in our country, the "New Austrian Method" drilling and blasting process is used for construction. There are certain problems in conventional blasting technology, such as the problem of not backfilling the blast hole or directly using the medicine box paper to block the gun mouth. Unscientific practices in blasting construction will lead to low utilization rate of blasting energy of pyrotechnic supplies, too strong muzzle shock wave, large distance to flying rocks and large slag throwing range, and large amount of toxic and harmful gases in blasting. The construction environment is harsh. [0003] In the existing tunnel blasting construction, ordinary "pre-splitting blasting" and "smooth blasting" charge structures and blasting designs are mostl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04E21D9/00
CPCE21D9/006F42D1/00F42D3/04
Inventor 张秦春周健植运华谢念魏华吕中玉张洪辉卢志军李硕贵李其心
Owner GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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