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An integrated drilling and reaming construction method for anchor holes

A construction method and integrated technology, applied in drilling equipment and methods, drilling with liquid/gas jet, earth drilling, etc. The problems such as the slip and instability of the anchor rod can achieve the effect of light weight, ensuring safety and easy recovery.

Inactive Publication Date: 2020-07-17
GUIZHOU INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in recent years, bolt support has become the main way of roadway support, but in the engineering application of bolt support, the failure form of the bolt is mainly the support process and the coal adhered to the hole wall during the anchoring process. The sliding between the anchor rod and the hole wall becomes unstable when gray or broken and soft surrounding rock
Through experiments and research, reaming the bottom of the anchor hole is one of the means to solve the problem of anchor bolt slipping and instability, so that the anchor bolt can be firmly anchored to the wall of the anchor hole through the injected anchoring agent, but there is no such method yet. Special construction method for reaming the bottom of the hole while drilling the anchor hole

Method used

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  • An integrated drilling and reaming construction method for anchor holes
  • An integrated drilling and reaming construction method for anchor holes
  • An integrated drilling and reaming construction method for anchor holes

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Embodiment Construction

[0025] like Figure 1-Figure 6 As shown, the anchor hole integrated drilling and reaming construction method of the present invention comprises the following steps:

[0026] (1) Determine the position of drilling anchor holes in the area to be supported planned in the roadway;

[0027] (2) Install or connect the drilling rig, drill pipe, high-pressure water pipe and integrated drilling and reaming device; the drilling rig, drill pipe, and high-pressure water pipe are not shown in the figure;

[0028] (3) Manipulate the integrated drilling and reaming device to drill the determined anchor hole position, stop drilling after the drill hole reaches the set depth, and ream the bottom of the anchor hole;

[0029] (4) After the reaming is completed, withdraw the integrated drilling and reaming device from the anchor hole to complete the drilling and reaming operations.

[0030] The integrated drilling and reaming device comprises a drilling and reaming rod 1, a drilling tool 2 and ...

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Abstract

An anchorage hole integrated drilling and reaming construction method comprises the following steps that (1) the position where an anchorage hole is drilled is determined in a to-be-supported area planned in a roadway; (2) a drilling rig, a drilling rod, a high-pressure water pipe and an integrated drilling and reaming device are assembled or connected; and (3) the integrated drilling and reamingdevice is controlled to drill the determined anchorage hole position, drilling is stopped after drilling reaches the set depth, and the hole bottom of the anchorage hole is reamed. Drilling and reaming operation is conducted through a water pressure adjusting mode; the anchorage hole integrated drilling and reaming construction method has the advantages that operation is convenient, the size is small, the mass is small, the technology is flexible and reliable, drilling and reaming power sources are unified, reaming is stable, cutting tools are easy to recover, and drilling and reaming are conducted simultaneously; and the anchorage firmness of an anchor rod is greatly improved, and the safety of workers during downhole operation is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of roadway support, and in particular relates to an integrated drilling and reaming construction method for anchor holes. Background technique [0002] Bolts used in underground roadway support have the characteristics of simple structure, convenient construction, and strong adaptability. Therefore, in recent years, bolt support has become the main way of roadway support, but in the engineering application of bolt support, the failure form of the bolt is mainly due to the coal adhering to the hole wall during the support process and the anchoring process. The sliding between the anchor rod and the hole wall becomes unstable when the rock is gray or broken and soft. Through experiments and research, reaming the bottom of the anchor hole is one of the means to solve the problem of anchor bolt slipping and instability, so that the anchor bolt can be firmly anchored to the wall of the anchor hole through the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21B7/18E21B7/28E21B21/00
CPCE21B7/18E21B7/28E21B21/00E21D20/003
Inventor 冯军发高丽刘江波曹皑民肖雨馨
Owner GUIZHOU INST OF TECH
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