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Resin and mortar combined anchor rod supporting structure and construction method thereof

A technology of bolt support and resin mortar, which is applied to the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems of high cost, low cost, slow force, etc., and achieve strong applicability and strong pull-out resistance , low cost effect

Inactive Publication Date: 2017-08-04
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the mine roadway support system, the resin anchor bolt has a short solidification time and fast stress, and can play two roles of temporary support and permanent support. However, due to the high cost of resin materials, resin end anchorage is usually used (some anchor bolts ), but only the permanent support pullout force provided by the resin end anchorage is limited, and the free section (unanchored section) of the resin anchor rod body needs to be treated with anticorrosion; It can fill part of the surrounding rock cracks to improve the stability of the surrounding rock, and the surrounding rock has strong adaptability, but the mortar solidification time is long and the force is slow, so it cannot provide temporary support in time and can only be used as a permanent support. If the self-stabilization time of the surrounding rock is short Other temporary support measures are required

Method used

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  • Resin and mortar combined anchor rod supporting structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] refer to figure 1 , the resin mortar combined bolt support structure of the present embodiment comprises a surrounding rock 6, and a borehole 5 is arranged in the surrounding rock 6, and an anchor rod body 1 is arranged in the borehole 5, and the anchor rod body 1 is a threaded steel anchor rod body , the upper part of the bolt body 1 in the borehole 5 is filled with resin anchoring agent 2 to form a resin anchoring section; the middle and lower sections are filled with mortar anchoring agent 3 to form a mortar anchoring section; The pre-tightening and slurry stop device 4 is locked.

[0018] The length of the resin anchoring section is determined by calculating the actual required temporary support strength. In this embodiment, the length of the resin anchoring section is 0.8m.

[0019] The length of the mortar anchoring section is determined by calculating the actual required permanent support strength. In this embodiment, the length of the mortar anchoring section i...

Embodiment 2

[0026] The construction method of the resin mortar combined bolt support structure of the present embodiment comprises the following steps:

[0027] (1) Drill holes 5 in the surrounding rock 6 of the roadway or tunnel, and clean the holes;

[0028] (2) Use grouting equipment to fill the mortar anchoring agent 3 from the bottom of the hole 5 to the outside; use the anchor rod body 1 to insert the resin roll into the drill hole 5 and screw it to the bottom of the hole, and rotate the anchor rod body 1 to make the bottom of the hole The resin anchoring agent 2 in the resin roll is completely overflowed; in this embodiment, the resin roll is an epoxy resin roll with a diameter of 28 mm and a length of 0.4 m per roll, and 2 rolls are used for each hole;

[0029] (3) After the resin anchoring agent is solidified, install the pre-tightening and slurry stop device 4 of the orifice. After the resin anchoring agent 2 is solidified, the upper section of the anchor rod body 1 is anchored ...

Embodiment 3

[0032] The construction method of the resin-mortar combined bolt support structure of this embodiment differs from that of Embodiment 1 only in that rapid hardening cement is used instead of resin anchoring agent 3, and the rest is the same as that of Embodiment 1.

[0033] The present invention integrates the advantages of fast stress on the resin anchor and strong applicability of the full anchor of the mortar anchor, and can provide temporary support and permanent support. The temporary end anchor is combined with the permanent full anchor. The resin anchorage section and the mortar anchorage section provide permanent support together, and the pullout resistance provided by the resin anchorage section of the present invention, that is, the temporary support strength provided by the resin anchorage section, should be greater than the actual required temporary support strength; the resin anchorage section and the mortar anchorage The total pull-out force provided by the sectio...

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Abstract

Resin mortar composite bolt support structure, including the surrounding rock, there is a drill hole in the surrounding rock, the drill hole is equipped with a bolt body, and the upper part of the bolt body in the drill hole is filled with resin anchoring agent to form a resin anchoring section; the middle and lower sections Filled with mortar anchoring agent to form a mortar anchoring section; the end of the anchor rod body reserved outside the borehole is locked by a pre-tightening and grout-stopping device. It also includes the construction method of the resin mortar combined bolt support structure. The invention can provide temporary support and permanent support, and the permanent support has strong strength and low manufacturing cost. The invention can provide temporary support and permanent support, and the permanent support has strong pull-out resistance and low manufacturing cost.

Description

technical field [0001] The invention relates to a bolt support structure, in particular to a resin mortar composite bolt support structure and a construction method thereof. Background technique [0002] At present, in the field of rock and soil, mines, and tunnels, bolts are usually used for support, and commonly used bolts include resin bolts and mortar bolts. In the mine roadway support system, the resin anchor bolt has a short solidification time and fast stress, and can play two roles of temporary support and permanent support. However, due to the high cost of resin materials, resin end anchorage is usually used (some anchor bolts ), but only the permanent support pullout force provided by the resin end anchorage is limited, and the free section (unanchored section) of the resin anchor rod body needs to be treated with anticorrosion; It can fill part of the surrounding rock cracks to improve the stability of the surrounding rock, and the surrounding rock has strong ada...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/00E21D21/00
CPCE21D20/003E21D21/0026
Inventor 彭云高忠民陈礼石黄敏李寿山黄卫文
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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