An intelligent fast application method of bolt prestress

A prestressing and anchoring technology, which is applied in the installation of anchors, earthwork drilling, mining equipment, etc., can solve the problems of time-consuming and efficiency, and achieve the effects of convenient use, high reliability, and fast economic benefits

Inactive Publication Date: 2021-08-03
CHINA UNIV OF MINING & TECH
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  • Claims
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Problems solved by technology

[0003] Purpose of the invention: In the process of reducing the deformation of the roadway caused by high ground stress during the excavation of the dynamic pressure retaining roadway, and the uneven settlement of the roof caused by the basic roof rotation, it is necessary to control the prestress and wait for anchorage The solidification of the agent and the control of the prestress size are not only time-consuming and inefficient. The present invention proposes an intelligent and rapid application method for bolt prestress

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  • An intelligent fast application method of bolt prestress
  • An intelligent fast application method of bolt prestress
  • An intelligent fast application method of bolt prestress

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Embodiment 1

[0033] refer to figure 1 , figure 2 with image 3 , the present embodiment provides an intelligent rapid application method for bolt prestress, the intelligent rapid application method specifically includes the following steps:

[0034] Step S1: Determine the magnitude of the warning force of the warning force bolt through on-site actual observation of the supported roadway.

[0035] Step S2: Install a constant resistance hydraulic jack 4 with an existing base oil pressure value on each bolt, that is, install a constant resistance hydraulic jack 4 between the upper supporting plate 3 and the lower supporting plate 5, specifically:

[0036] Insert the anchor rod body 2 into the drill hole after the anchor bolter drills the hole, and fix it with the resin drug coil 1 anchoring agent at the end, and then insert the upper supporting plate 3 of the constant resistance hydraulic jack 4 into the anchor rod from the free end , insert the constant resistance hydraulic jack 4 from t...

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Abstract

The invention discloses an intelligent fast application method of bolt prestress. The steps are as follows: S1: through on-site actual observation of the supported roadway, determine the magnitude of the warning force of the warning force bolt; S2: install the constant resistance hydraulic pressure At the same time, the hydraulic pump injects liquid into the constant resistance hydraulic jack through the liquid injection pipeline; S3: Set the threshold value of the pressure valve of the detection pipeline, and the constant resistance hydraulic jack injects the emulsion into the detection pipeline according to the threshold value of the pressure valve, and passes the detection The flow sensor in the pipeline monitors the emulsion in the detection pipeline; S4: According to the monitoring results of the flow sensor, determine the prestress applied on the anchor rod, and compare the determined prestress applied on the anchor rod with the early warning force comparison, and at the same time determine whether the hydraulic pump continues to inject liquid into the constant resistance hydraulic jack according to the comparison result. The intelligent application method of the present invention not only has high reliability and high efficiency, but also complies with the current development trend of intelligent equipment.

Description

technical field [0001] The invention relates to the technical field of novel prestressed anchor rods, in particular to an intelligent and rapid application method for prestressed anchor rods. Background technique [0002] The roadways mined in deep mines are severely affected by dynamic pressure. In order to reduce the roadway deformation caused by the high ground stress during the excavation of the dynamic pressure roadway retaining roadway, and the interlayer displacement caused by the uneven settlement of the roof caused by the basic roof rotation, high Prestressed bolt support. The general process of the current prestressing method for anchor rods is: the operator controls the tensioning device, applies tension to the anchor rod, or applies torque to the anchor rod through a nut, and then waits for the anchoring agent to solidify or weld to form a prestressed anchor rod. The traditional method is time-consuming and inefficient because of the need to control the size of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21D20/02E21D21/00E21D21/02
CPCE21D20/00E21D20/025E21D21/0026E21D21/008E21D21/02
Inventor 郑西贵吕勃翰刘怀东陈思卫董亚男田芳雪
Owner CHINA UNIV OF MINING & TECH
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