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Grouting material and local fractured formation inclined shaft inverse well guide hole drilling technology using the same

A grouting material and stratum technology, which can be used in earth-moving drilling, directional drilling, wellbore/well components, etc., can solve problems such as toxic and harmful components, reduce labor intensity, shorten solidification time, and improve synergy. Effect

Active Publication Date: 2017-11-03
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that existing grouting materials contain toxic and harmful components, thereby providing an environmentally friendly cement-based grouting material with short setting time, high strength and strong underwater dispersion resistance

Method used

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  • Grouting material and local fractured formation inclined shaft inverse well guide hole drilling technology using the same
  • Grouting material and local fractured formation inclined shaft inverse well guide hole drilling technology using the same
  • Grouting material and local fractured formation inclined shaft inverse well guide hole drilling technology using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A cement-based grouting material, which is specifically composed of the following components:

[0044]

[0045] Wherein, the fine aggregate is river sand with a particle size of 1.5-2.2mm, and the specific surface area of ​​the mineral powder is 2000m 2 / kg; the silica fume bulk density is 500kg / m 3 , the expansion agent is a mixture of alkali metal plastic expansion agent and calcium sulfoaluminate concrete expansion agent with a mass ratio of 1:50; the water reducing agent is a polycarboxylate high-performance water reducing agent; the anti-dispersion The compound is a mixture of polyacrylamide and hydroxypropyl guar gum with a mass ratio of 1:2.

[0046]In this embodiment, the cement-based grouting material is prepared by the following steps:

[0047] Mix the anti-dispersion compound with the water and stir for 2 minutes; add 12.3g of the ordinary Portland cement, 24.5g of the fine aggregate, 5g of the mineral powder, 1.5g of the silica fume and 0.17g of the Sa...

Embodiment 2

[0049] A cement-based grouting material mixed with the following components by weight:

[0050]

[0051] Wherein, the fine aggregate is river sand with a particle size of 0.5-1.2mm, and the mineral powder has a specific surface area of ​​1600m 2 / kg; the silica fume bulk density is: 300kg / m 3 , the expansion agent is a mixture of alkali metal plastic expansion agent and calcium sulfoaluminate concrete expansion agent with a mass ratio of 1:60, the water reducer is a polycarboxylate high-performance water reducer, and the anti-dispersion The compound is a mixture of polyacrylamide and hydroxypropyl guar gum with a mass ratio of 1:2.

[0052] In this embodiment, the cement-based grouting material is prepared by the following steps:

[0053] Mix the anti-dispersion compound with the water and stir for 1 min; add 11.67g of the ordinary Portland cement, 22.5g of the fine aggregate, 4g of the mineral powder, 1g of the silica fume and 0.13g of the Expanding agent, stirring for ...

Embodiment 3

[0055] A cement-based grouting material mixed with the following components by weight:

[0056]

[0057] Wherein, the fine aggregate is river sand with a particle size of 0.6-1.5mm, and the specific surface area of ​​the mineral powder is 1400m 2 / kg; the silica fume bulk density is 600kg / m 3 , the expansion agent is a mixture of alkali metal plastic expansion agent and calcium sulfoaluminate concrete expansion agent with a mass ratio of 1:70; the water reducer is a polycarboxylate high-performance water reducer, and the anti-dispersion The compound is a mixture of polyacrylamide and hydroxypropyl guar gum with a mass ratio of 1:2.

[0058] In this embodiment, the cement-based grouting material is prepared by the following steps:

[0059] Mix the anti-dispersion compound with the water and stir for 2 minutes; add 13.3g of the ordinary Portland cement, 27.5g of the fine aggregate, 6g of the mineral powder, 2g of the silica fume and 0.2g of the Expansion agent, stirred for...

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Abstract

Belonging to the technical field of inclined shaft construction, the invention discloses a grouting material and a local fractured formation inclined shaft inverse well guide hole drilling technology using the same. The grouting material includes: P.O42.5 ordinary portland cement, fine aggregate, mineral powder, silica fume, an expansive agent, a water reducing agent and an anti-dispersion compound. The cement based grouting material provided by the invention can be used at an underwater bottom layer, has short setting time, high strength, strong underwater anti-dispersion ability, and a hole sealing success rate up to 95% or more. The local fractured formation inclined shaft inverse well guide hole drilling technology provided by the invention utilizes a raise boring machine drill rod to inject the cement based grouting material into a fracture zone so as to reinforce the fractured formation. The inverse well guide hole drilling technology provided by the invention can achieve construction in fractured formation, the construction efficiency can be improved by 25% or more, and also the application scope of inverse well method is broadened.

Description

technical field [0001] The invention belongs to the technical field of inclined well construction, and in particular relates to a grouting material and a pilot hole drilling process for inclined wells in partially broken formations using the same. Background technique [0002] There are a large number of inclined well shafts in the water diversion system of the pumped storage power station. These inclined wells are mostly arranged at about 50°, and have the characteristics of long length and large diameter. The safe construction of the inclined well section is the key to the construction of the entire water delivery system. At present, such inclined wells usually adopt the construction method of "pilot well excavation, and then expand the excavation". There are two types of pilot well excavation, one is the pilot well drilled by a raise drilling rig, and the other is the tank climbing method. Among them, the crawling irrigation method requires a large number of personnel to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E21B7/06E21B47/022E21B49/00C04B111/27C04B111/70
CPCC04B28/04C04B2111/00663C04B2111/00724C04B2111/275C04B2111/70C04B2201/05C04B2201/50E21B7/06E21B47/022E21B49/005C04B14/06C04B18/141C04B18/146C04B24/2652C04B24/38C04B20/0076C04B2103/302C04B2103/0068
Inventor 费万堂马雨峰龙小刚刘双华董云涛王润荆国业姜浩亮
Owner STATE GRID CORP OF CHINA
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