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Anchor rod prestress intelligent fast construction method

A technology of prestressing and bolting, which is used in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve the problems of time-consuming and efficiency, and achieve the effect of convenient use, high efficiency and simple work flow

Inactive Publication Date: 2020-09-04
CHINA UNIV OF MINING & TECH
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  • Description
  • 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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  • Anchor rod prestress intelligent fast construction method
  • Anchor rod prestress intelligent fast construction method
  • Anchor rod prestress intelligent fast construction method

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Embodiment 1

[0033] refer to figure 1 , figure 2 and 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 th...

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Abstract

The invention discloses an anchor rod prestress intelligent fast construction method. The anchor rod prestress intelligent fast construction method comprises the following steps that S1, a supported roadway is subjected to on-site actual observation, and the early warning force of an early warning anchor rod is determined; S2, a constant-resistance hydraulic jack is mounted, and meanwhile a hydraulic pump injects liquid inlet the constant-resistance hydraulic jack through a liquid injecting pipeline; S3, the threshold value of a pressure valve of a detecting pipeline is set, emulsified liquidis injected into the detecting pipeline through the constant-resistance hydraulic jack according to the threshold value of the pressure valve, and the emulsified liquid in the detecting pipeline is monitored through a flow sensor in the detecting pipeline; and S4, according to the monitoring result of the flow senor, prestress applied to an anchor rod is determined, the determined prestress applied to the anchor rod is compared with the early warning force, and meanwhile according to the comparison result, whether the hydraulic pump needs to continue to inject the liquid into the constant-resistance hydraulic jack or not is determined. The intelligent construction method is high in reliability and efficiency, and accords with the intelligent development trend of current 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 Applications(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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