阅读说明：本技术 一种锚杆预应力智能化快速施加方法 (Intelligent and rapid application method for prestress of anchor rod ) 是由 郑西贵 吕勃翰 刘怀东 陈思卫 董亚男 田芳雪 于 2020-06-11 设计创作，主要内容包括：本发明公开了一种锚杆预应力智能化快速施加方法,步骤如下：S1：通过对所支护的巷道进行现场实际观测,确定出预警力锚杆的预警力大小；S2：安装恒阻液压千斤顶,同时液压泵通过注液管道向恒阻液压千斤顶进行注液；S3：设置检测管道的压力阀的阈值,恒阻液压千斤顶根据压力阀的阈值,向检测管道内注入乳化液,并通过检测管道内的流量传感器对检测管道内的乳化液进行监测；S4：根据流量传感器的监测结果,确定出锚杆上施加的预应力,并将确定出的锚杆上施加的预应力与预警力进行比较,同时根据比较结果,确定出液压泵是否继续向恒阻液压千斤顶进行注液。本发明的智能化施加方法不仅可靠性高、效率高,同时还符合当前设备智能化的发展趋势。(The invention discloses an intelligent and rapid prestress application method for an anchor rod, which comprises the following steps: s1: the early warning force of the early warning force anchor rod is determined by carrying out on-site actual observation on a supported roadway; s2: installing a constant-resistance hydraulic jack, and simultaneously injecting liquid into the constant-resistance hydraulic jack by a hydraulic pump through a liquid injection pipeline; s3: setting a threshold value of a pressure valve of a detection pipeline, injecting emulsion into the detection pipeline by the constant-resistance hydraulic jack according to the threshold value of the pressure valve, and monitoring the emulsion in the detection pipeline through a flow sensor in the detection pipeline; s4: and determining the prestress applied to the anchor rod according to the monitoring result of the flow sensor, comparing the determined prestress applied to the anchor rod with the early warning force, and determining whether the hydraulic pump continues to inject liquid to the constant-resistance hydraulic jack or not according to the comparison result. The intelligent application method of the invention has high reliability and high efficiency, and simultaneously conforms to the development trend of the intellectualization of the current equipment.)

1. An intelligent rapid application method of anchor rod prestress is characterized by comprising the following steps:

s1: the early warning force of the early warning force anchor rod is determined by carrying out on-site actual observation on a supported roadway;

s2: each anchor rod is provided with a constant-resistance hydraulic jack (4) with a basic oil pressure value, and meanwhile, a hydraulic pump injects liquid into the constant-resistance hydraulic jack (4) through a liquid injection pipeline;

s3: setting a threshold value of a pressure valve of a detection pipeline, injecting emulsion into the detection pipeline by the constant-resistance hydraulic jack (4) according to the threshold value of the pressure valve, and monitoring the emulsion in the detection pipeline through a flow sensor in the detection pipeline;

s4: and judging the prestress applied to the anchor rod according to the monitoring result of the flow sensor, comparing the determined prestress applied to the anchor rod with the early warning force, and simultaneously determining whether the hydraulic pump continues to inject liquid to the constant-resistance hydraulic jack (4) or not according to the comparison result.

2. The intelligent and rapid anchor rod prestress application method according to claim 1, wherein in the step S2, a constant-resistance hydraulic jack (4) with a base oil pressure value is installed on each anchor rod, specifically:

after drilling a hole, the anchor rod is inserted into the drilled hole and is fixed through an anchoring agent of a resin cartridge (1) at the end, an upper supporting plate (3) of a constant-resistance hydraulic jack (4) is sleeved into the anchor rod from the free end, the constant-resistance hydraulic jack (4) is sleeved from the free end, a lower supporting plate (5) of the constant-resistance hydraulic jack (4) is sleeved from the free end, a nut (6) is sleeved from the free end, finally the nut (6) is screwed to enable the upper supporting plate (3), the constant-resistance hydraulic jack (4) and the lower supporting plate (5) to be in contact, and meanwhile, a liquid injection pipeline of a hydraulic pump is connected with a liquid injection interface of the constant-resistance hydraulic jack (4).

3. The intelligent and rapid anchor rod prestress application method according to claim 2, wherein in the step S2, the hydraulic pump injects liquid to the constant-resistance hydraulic jack (4) through a liquid injection pipeline, specifically:

the starting button of the control switch is pressed, a single chip microcomputer in the control switch inputs a high level into the control circuit, the control switch is in a closed state, and meanwhile, the hydraulic pump injects liquid into the constant-resistance hydraulic jack (4) through a liquid injection pipeline.

4. An intelligent rapid application method of anchor rod prestress according to claim 1, 2 or 3, characterized in that in the step S3, the threshold value of the pressure valve of the detection pipeline is set to 80% of the working resistance of the constant-resistance hydraulic jack (4).

5. The intelligent and rapid anchor rod prestress application method according to claim 4, wherein the working resistance of the constant-resistance hydraulic jack (4) is determined through on-site actual measurement according to actual surrounding rock characteristics and a roof sinking rate of a roadway to be supported.

6. The intelligent and rapid anchor rod prestress application method according to claim 4, wherein in the step S3, the emulsion in the detection pipeline is monitored by a flow sensor in the detection pipeline, specifically as follows:

s3.1: setting a threshold value of a pressure valve of the detection pipeline according to the working resistance of the constant-resistance hydraulic jack (4);

s3.2: injecting liquid into the constant-resistance hydraulic jack (4), increasing the pressure of the constant-resistance hydraulic jack (4) until the pressure of the constant-resistance hydraulic jack (4) reaches the threshold value of a pressure valve, opening the pressure valve of the detection pipeline, and allowing the emulsion to flow into the detection pipeline through the opened pressure valve;

s3.3: the flow sensor monitors the emulsion entering the detection pipeline.

7. The intelligent and rapid anchor rod prestress application method according to claim 6, wherein in the step S4, it is determined whether the hydraulic pump continues to inject liquid into the constant-resistance hydraulic jack (4), specifically:

when the flow sensor monitors that emulsion in a detection pipeline is detected, the flow sensor transmits a flow signal to a single chip microcomputer in a control switch through wireless WIFI, the single chip microcomputer inputs a low level into a control circuit, and meanwhile, the hydraulic pump stops injecting liquid into the constant-resistance hydraulic jack (4) through a liquid injection pipeline;

when the flow sensor does not monitor the emulsion in the detection pipeline, the flow sensor inputs a low level to a single chip microcomputer in a control switch, the single chip microcomputer inputs a high level into a control circuit, and meanwhile, the hydraulic pump continuously injects liquid to the constant-resistance hydraulic jack (4) through a liquid injection pipeline.

Technical Field

The invention relates to the technical field of novel prestressed anchor rods, in particular to an intelligent and rapid application method of prestress of an anchor rod.

Background

The roadway of deep mine exploitation is severely influenced by dynamic pressure, and in order to reduce the roadway deformation caused by high ground stress of the dynamic pressure entry retaining roadway during the tunneling and the interlayer dislocation caused by uneven settlement caused by basic top rotation of a roof, high prestressed anchor rods are adopted for supporting. The existing anchor rod prestress application method generally comprises the following processes: the industrial control tensioning device applies tension to the anchor rod, or applies torque to the anchor rod through the nut, and then waits for the solidification or welding of the anchoring agent to form the prestressed anchor rod. The traditional method is time-consuming and low in efficiency due to the fact that the prestress needs to be controlled, the anchoring agent needs to be solidified, and the prestress is controlled, so that the technical requirement on workers is high, the reliability is low, the intelligent propelling of the existing tunneling face cannot be adapted, particularly, the mining depth is continuously increased, and the manual operation difficulty is increased.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides an intelligent rapid application method of anchor rod prestress, which aims to solve the problems that the time is consumed and the efficiency is low because the prestress needs to be controlled, the solidification of an anchoring agent is waited, and the prestress needs to be controlled in the process of reducing interlayer dislocation caused by roadway deformation of a dynamic pressure roadway subjected to high ground stress during the tunneling and uneven settlement of a top plate caused by basic top rotation.

The technical scheme is as follows: in order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:

an intelligent rapid application method for prestress of an anchor rod specifically comprises the following steps:

s1: the early warning force of the early warning force anchor rod is determined by carrying out on-site actual observation on a supported roadway;

s2: each anchor rod is provided with a constant-resistance hydraulic jack with a basic oil pressure value, and meanwhile, a hydraulic pump injects liquid into the constant-resistance hydraulic jack through a liquid injection pipeline;

s3: setting a threshold value of a pressure valve of a detection pipeline, injecting emulsion into the detection pipeline by the constant-resistance hydraulic jack according to the threshold value of the pressure valve, and monitoring the emulsion in the detection pipeline through a flow sensor in the detection pipeline;

s4: and judging the prestress applied to the anchor rod according to the monitoring result of the flow sensor, comparing the determined prestress applied to the anchor rod with the early warning force, and simultaneously determining whether the hydraulic pump continues to inject liquid to the constant-resistance hydraulic jack according to the comparison result.

Further, in step S2, a constant-resistance hydraulic jack with a base oil pressure value is installed on each anchor rod, specifically:

after drilling a hole by the anchor drilling machine, inserting the anchor rod into the drilled hole, fixing the anchor rod through a resin cartridge anchoring agent at the end, sleeving an upper supporting plate of the constant-resistance hydraulic jack into the anchor rod from a free end, sleeving the constant-resistance hydraulic jack from the free end, sleeving a lower supporting plate of the constant-resistance hydraulic jack from the free end, sleeving a nut from the free end, finally screwing the nut to enable the upper supporting plate, the constant-resistance hydraulic jack and the lower supporting plate to be in contact, and simultaneously connecting a liquid injection pipeline of the hydraulic pump with a liquid injection interface of the constant-resistance hydraulic jack.

Further, in step S2, the hydraulic pump injects liquid to the constant resistance hydraulic jack through a liquid injection pipeline, specifically:

the starting button of the control switch is pressed, a single chip microcomputer in the control switch inputs a high level into the control circuit, the control switch is in a closed state, and meanwhile, the hydraulic pump injects liquid into the constant-resistance hydraulic jack through a liquid injection pipeline.

Further, in the step S3, the threshold value of the pressure valve of the detection pipeline is set to 80% of the working resistance of the constant-resistance hydraulic jack.

Furthermore, the working resistance of the constant-resistance hydraulic jack is determined through on-site actual measurement according to the actual surrounding rock characteristics of the supported roadway and the sinking rate of the top plate.

Further, in step S3, the emulsion in the detection pipeline is monitored by the flow sensor in the detection pipeline, which is as follows:

s3.1: setting a threshold value of a pressure valve of the detection pipeline according to the working resistance of the constant-resistance hydraulic jack;

s3.2: the pressure of the constant-resistance hydraulic jack is increased by injecting liquid into the constant-resistance hydraulic jack until the pressure of the constant-resistance hydraulic jack reaches the threshold value of a pressure valve, the pressure valve of the detection pipeline is opened, and the emulsion flows into the detection pipeline through the opened pressure valve;

s3.3: the flow sensor monitors the emulsion entering the detection pipeline.

Further, in step S4, it is determined whether the hydraulic pump continues to inject the liquid into the constant-resistance hydraulic jack, specifically:

when the flow sensor monitors that emulsion in a detection pipeline is detected, the flow sensor transmits a flow signal to a single chip microcomputer in a control switch through wireless WIFI, the single chip microcomputer inputs a low level into a control circuit, and meanwhile, the hydraulic pump stops injecting liquid into the constant-resistance hydraulic jack through a liquid injection pipeline;

when the flow sensor does not monitor the emulsion in the detection pipeline, the flow sensor inputs a low level to a single chip microcomputer in a control switch, the single chip microcomputer inputs a high level into a control circuit, and meanwhile, the hydraulic pump continues to inject liquid into the constant-resistance hydraulic jack through a liquid injection pipeline.

Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:

(1) according to the intelligent applying method, hydraulic pressure is added to the jack arranged at the free end of the anchor rod through the electric hydraulic pump, so that a high-prestress anchor rod can be formed between the surrounding rock wall and the tray due to interaction force, the hydraulic pump can provide a stable power source, the magnitude of applied prestress can be accurately controlled, after the magnitude of the prestress is reached, the operation can be intelligently finished through WIFI signal transmission between the flow sensor and the electric hydraulic pump, and other waiting time is not needed, so that the applying method is high in reliability and efficiency, and simultaneously, the intelligent developing trend of the current equipment is met;

(2) the intelligent applying method has the advantages of simple working process, convenient use and quick applied prestress, and can effectively control the deformation and separation of the surrounding rock, effectively reduce the supporting time of the driving roadway and accelerate the propelling speed of the roadway, thereby obtaining economic benefit more quickly and meeting the current development trend of intelligence, economy and green.

Drawings

FIG. 1 is a schematic flow diagram of an intelligent rapid application method of the present invention;

FIG. 2 is a schematic plan view of the present invention;

FIG. 3 is a flow chart of the operation of the control switch of the present invention;

part names corresponding to reference numbers in the drawings:

1. resin medicated rolls; 2. a rod body; 3. an upper supporting plate; 4. a constant-resistance hydraulic jack; 5. a lower supporting plate; 6. and a nut.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The described embodiments are a subset of the embodiments of the invention and are not all embodiments of the invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.