A high-efficiency mixing and alternating dual-hole segmental grouting method

A segmented grouting and alternating technology, which is applied in earth-moving drilling, vertical well equipment, wellbore lining, etc., can solve the problems of inhomogeneous slurry diffusion range, poor grouting effect and low grouting efficiency, and achieve uniform slurry diffusion. Scope, fast grouting efficiency, good grouting effect

Active Publication Date: 2021-01-05
SHANDONG UNIV OF SCI & TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

At present, the single-hole segmented grouting method is commonly used in mines. The grouting effect is poor and the grouting efficiency is low. Especially for heterogeneous strata, the grouting radius is small and the grouting range is not uniform enough.

Method used

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  • A high-efficiency mixing and alternating dual-hole segmental grouting method
  • A high-efficiency mixing and alternating dual-hole segmental grouting method

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Embodiment 1

[0033] A high-efficiency mixed alternate double-hole segmented grouting method, comprising the following steps:

[0034] I. First, set the drilling angle, length, position and quantity according to the pre-reinforcement range. According to the design requirements, align the hole positions, and drill holes at both ends of the pre-reinforcement range;

[0035] II. Divide the grouting length of the borehole into several sections according to the geological conditions at the site, and control the retreat distance of each cycle at 2 to 3 meters;

[0036] III. Use a drill bit to open a grouting hole at one end of the pre-reinforcement range. After reaching the drilling depth, withdraw the drilling tool, install a pre-processed No. 1 orifice pipe with a flange in the drill hole, and use quick-setting cement Seal the gap between the No. 1 orifice pipe and the surrounding formation; then replace the drill bit with a diameter smaller than the No. 1 orifice pipe, drill through the No. 1 ...

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Abstract

The invention discloses a novel efficient mixed alternate double-hole subsection grouting method. The method comprises the following steps of: firstly, setting drilling angles, lengths, positions andnumbers according to a required pre-reinforcement range, aligning hole positions according to design requirements, and respectively drilling holes with drill bits at the two ends of the pre-reinforcement range; secondly, dividing the drilling grouting length into a plurality of sections according to the on-site geological condition, and controlling the retreating distance of each cycle to be 2-3 meters; and thirdly, respectively forming a grouting hole and a pressure reducing hole for grouting operation. A more uniform slurry diffusion range can be achieved, the grouting effect is better, andespecially for heterogeneous strata, the advantages of common grouting are more obvious. The advantages of sectional grouting are fully utilized, and innovation and improvement are carried out, so that the grouting effect is more obvious, the grouting radius is larger, and the grouting efficiency is higher.

Description

technical field [0001] The invention relates to a grouting method, in particular to a high-efficiency mixing and alternating dual-hole segmented grouting method. Background technique [0002] In the construction of mines, tunnels, water conservancy and other underground engineering fields, unfavorable geological bodies or fault fracture zones are often encountered. Due to the development of water-conducting structures such as pores and cracks, and a large number of weak rock mass media with weak self-stabilization ability, The initial geostress state of the rock mass is easily changed under engineering disturbance, leading to cracks in the surrounding rock within a certain depth range and the gradual expansion of cracks, and finally manifested as rock mass relaxation cracks, slab cracks, slab cracks, etc. Rock cracking and damage, thereby inducing engineering accidents such as water inrush and landslides. In order to control the catastrophic damage of the cracked surroundin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/105
Inventor 张培森李腾辉颜伟赵成业侯季群孙亚楠闫奋前吴俊达
Owner SHANDONG UNIV OF SCI & TECH
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