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Water burst blast hole plugging method

A blasting hole and water gushing technology, which is applied in earthwork drilling, wellbore/well parts, sealing/isolation, etc., can solve problems such as difficult quality assurance, long plugging time, poor plugging effect, etc., and achieve simple and convenient construction, Good plugging effect and fast construction speed

Active Publication Date: 2015-01-07
SINOHYDRO BUREAU 6 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the drilling construction of blastholes used for blasting in areas with rich groundwater or on the outside of surrounding rocks for rivers, lakes, reservoirs, etc. , In reservoirs, groundwater or water from rivers, lakes, and reservoirs will gushes out of blastholes, resulting in the failure of subsequent construction, and the blastholes where the water gushes must be blocked
The current conventional plugging method is to use a wooden plug or a plug for grouting. Due to the existence of pressure water in the hole, the hole of the water gushing hole can only be blocked, and then a hole is opened next to it for pressure grouting. Because the water gushing hole It is connected with the underground water channel or the rivers, lakes, and reservoirs outside, which makes it difficult to block the water gushing hole, and it is difficult to fill the water gushing hole with slurry. The hole is blocked for a long time, and the loss of slurry is also large. The plugging effect is poor and the cost is high, and once the plugging quality is not good, it will directly affect the forming quality of other nearby blastholes, thereby affecting the charge of the blasthole and the blasting effect of rocks, and resulting in a substantial increase in costs

Method used

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the embodiments.

[0014] A water plugging method for water gushing holes, the steps of which are:

[0015] (1) When blasthole drilling encounters water gushing, stop drilling immediately, operate the drilling rig, rotate the drill pipe in the opposite direction, and withdraw the drill pipe gradually.

[0016] (2) Prepare the high-pressure rubber expansion hose. The length of the high-pressure rubber expansion hose is 30-50cm, the outer diameter is 3-5mm smaller than the blasthole diameter, and the wall thickness is 8-10mm. Both ends of the high-pressure rubber expansion hose are closed structures, and a check valve and a water injection hose are installed at one end. The expansion hose is pushed into the hole, and stops when it reaches the bottom of the hole, so that the high-pressure rubber expansion hose is installed at the bottom of the hole.

[0017] (3) Using the water injection hose ins...

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Abstract

A water burst blast hole plugging method comprises the steps of (1) stopping drilling instantly and withdrawing a drill rod when water burst occurs during blast hole drilling; (2) ejecting a high-pressure rubber expansion rubber hose into the bottom of a hole with a drilling machine, wherein the two ends of the high-pressure rubber expansion rubber hose are sealed, and a check valve and a water injection rubber hose are installed at one end of the high-pressure rubber expansion rubber hose; (3) injecting pressure water into the high-pressure rubber expansion rubber hose with a high-pressure pump by means of the water injection rubber hose to enable the high-pressure rubber expansion rubber hose to be large enough to abut against the blast hole; (4) withdrawing the drilling rod; (5) conducting grout sealing on the blast hole; (6) stop grouting after the blast hole is filled with grout. The method well achieves hole plugging when water burst occurs during blast hole drilling which is conducted in an area with abundant underground water and is highly targeted, the high-pressure rubber expansion rubber hose is expanded after reaching the bottom of the hole, water burst is prevented from being continued through the blast hole, the portion, between the high-pressure rubber expansion rubber hose and the opening of the blast hole, of the blast hole does not contain gush water any more, cement mortar grout sealing can be conducted on the blast hole conveniently, sealing is easy and convenient, construction speed is high, quality is high, grout loss is avoided, plugging effect is good, and cost is low.

Description

technical field [0001] The invention relates to a water blocking method when water gushes out during the drilling of blastholes, in particular to a water blocking method used in areas with abundant groundwater or on the outside of surrounding rocks where rivers, lakes, reservoirs, etc. occur during the drilling of blastholes. Water blocking method when water gushes. Background technique [0002] During the drilling construction of blastholes used for blasting in areas with rich groundwater or on the outside of surrounding rocks for rivers, lakes, reservoirs, etc. , In reservoirs, groundwater or water from rivers, lakes, and reservoirs will gushes out of blastholes, causing subsequent construction to fail normally, and the blastholes for gushing water must be blocked. The current conventional plugging method is to use a wooden plug or a plug for grouting. Due to the existence of pressure water in the hole, the hole of the water gushing hole can only be blocked, and then a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/10
CPCE21B33/10E21B33/13
Inventor 叶明
Owner SINOHYDRO BUREAU 6 CO LTD
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