CN204575041U - A kind of anchor cable formula instrument of roof separation - Google Patents

Abstract

The utility model relates to an anchor cable-type roof separation indicator. The indicator is mainly composed of a hollow cable body, a displacement base point connection line, a tray, a lock, and a displacement reading device. The cable body is hollow, and the displacement base point connection line runs through it. Inside the hollow cable body, one end is affixed to the top of the cable body, and the other end passes through the end of the cable body and is connected to the displacement reading device. The displacement reading device measures the change in length of the connection line of the base point of the displacement of the cable body. The deformation of the cable body is obtained, and then the amount of rock layer separation within the anchorage range of the anchor cable is measured, and the value of the supporting force of the cable body can be obtained by using the linear relationship between the deformation of the cable body and the tension on the cable body. On the basis of ensuring high accuracy and reliability, the indicator has the characteristics of not needing to drill a special monitoring borehole, exerting the effect of the supporting body while monitoring, and being able to monitor the force and deformation of the supporting body. It has a good promotion prospect.

Description

An Anchor Roof Detachment Indicator

technical field

The utility model belongs to the technical field of instruments, in particular to an anchor cable-type roof abscission indicator capable of measuring the amount of rock layer abscission in the anchorage range of the anchor cable and the force of a supporting body.

Background technique

The supporting force and deformation of the supporting body are important indicators to measure the supporting effect. At present, all kinds of commonly used mine roof detachment indicators can monitor the roadway roof detachment accurately in real time, but special monitoring drilling is required, which not only destroys the integrity of the roof, but also greatly increases the underground Amount, affecting the normal production of workers; can only monitor the amount of layer separation on the roof of the roadway, and cannot monitor the force and deformation of the support body at the same time, the monitoring data is single, and it is difficult to comprehensively evaluate the quality of support and the stability of the roof. Commonly used load cells include sinusoidal, hydraulic, piezoelectric, etc. These types of instruments are easily affected by the harsh downhole environment, and the accuracy and stability are difficult to guarantee for a long time. The anchor cable-type roof separation indicator introduced in the present invention not only completes the monitoring task, but also plays the role of the supporting body, without the need to drill special monitoring holes; the mechanical displacement scale or displacement indicator can handle the conversion and directly display the anchor The deformation and stress of the cable can provide more accurate and effective data for comprehensive evaluation of the support effect.

Inside the utility model

The purpose of this utility model is to provide an anchor cable-type roof separation indicator. On the basis of ensuring high measurement accuracy and reliability, the indicator has the advantages of not needing to drill monitoring holes, and playing a supporting role while monitoring. It can monitor the force and deformation of the supporting body and other characteristics.

The technical scheme that the utility model solves its technical problem adopts is:

Technical solution one:

An anchor cable-type roof separation indicator, which is composed of a hollow cable body, a displacement base point connection line, a tray, a lock, and a displacement reading device. The cable body is hollow, and the displacement base point connection line runs through the interior of the hollow core cable body. It is fixed on the top of the cable body, and the other end passes through the tail end of the cable body, and is connected with the displacement reading device. The displacement reading device measures the change in the length of the connecting line of the cable body segment displacement base point, and obtains the deformation of the cable body, thereby measuring The amount of rock layer separation within the anchorage range of the anchor cable is obtained.

An anchor cable-type roof separation indicator, by measuring the deformation of the cable body, using the linear relationship between the deformation of the cable body and the tension on the cable body to obtain the magnitude of the tension on the cable body, and obtain the supporting force of the cable body value, the displacement reading device is a mechanical displacement scale, which is composed of a displacement conversion structure and a scale. The displacement conversion structure converts the displacement signal into a signal that can be read by the scale. support force. The conversion relationship between the roof separation amount and the anchor cable support force is:

$\mathrm{<span\; class="notranslate">\; f</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; \&Delta;lEA</span>}}{\mathrm{<span\; class="notranslate">\; l</span>}}$

In the formula, F is the supporting force of the anchor cable, Δl is the change in the length of the base point line of the displacement of the cable body, E is the elastic modulus of the metal material used for the anchor cable body, A is the cross-sectional area of the anchor cable body, and l is the anchor cable The initial length of the rod body.

When installing, put the anchor cable body against the anchoring agent and stuff it into the drill hole. When the cable body and the anchoring agent reach the deepest part of the drill hole, the bolt turning machine is connected with the external thread at the end of the cable body, and the drilling rig drives the entire anchor cable body to rotate until Stir the anchoring agent evenly. After the anchoring agent anchors the cable body, put the tray into the end of the cable body and press it tightly with the lock to form the initial anchoring force. Pass the connection line of the displacement base point of the tail end of the cable body through the internal thread connection nut and the elbow type external thread nut, the internal thread connection nut is threaded with the elbow type external thread nut, and the elbow type external thread nut is threaded connect. After straightening the connection line of the displacement base point, the pointer of the scale is fixed on the zero scale line of the displacement, and the installation of the indicator is completed.

Technical solution two:

An anchor cable-type roof separation indicator, which is composed of a hollow cable body, a displacement base point connection line, a tray, a lock, and a displacement reading device. The cable body is hollow, and the displacement base point connection line runs through the interior of the hollow core cable body. It is fixed on the top of the cable body, and the other end passes through the tail end of the cable body, and is connected with the displacement reading device. The displacement reading device measures the change in the length of the connecting line of the cable body segment displacement base point, and obtains the deformation of the cable body, thereby measuring The amount of rock layer separation within the anchorage range of the anchor cable is obtained.

An anchor cable-type roof separation indicator, by measuring the deformation of the cable body, using the linear relationship between the deformation of the cable body and the tension on the cable body to obtain the magnitude of the tension on the cable body, and obtain the supporting force of the cable body value.

The displacement reading device is a displacement indicator, which is composed of a displacement sensor and a secondary instrument. The displacement sensor transmits the read displacement signal to the secondary instrument through a data connection line for processing, calculation and storage. The displacement indicator can respectively display the separation layer of the roof. Amount and anchor cable support force.

When installing, put the anchor cable body against the anchoring agent and stuff it into the drill hole. When the cable body and the anchoring agent reach the deepest part of the drill hole, the bolt turning machine is connected with the external thread at the end of the cable body, and the drilling rig drives the entire anchor cable body to rotate until Stir the anchoring agent evenly. After the anchoring agent anchors the cable body, put the tray into the end of the cable body and press it tightly with the lock to form the initial anchoring force. Thread the internal thread nut to the threaded section at the end of the cable body. The displacement base point line is connected to the displacement sensor through a fastening screw and fastened to the large diameter end of the displacement sensor. The diameter of the upper end of the displacement sensor is larger than the internal diameter of the internal thread nut and can be stuck inside. At the bottom of the threaded nut, the range of thread connection between the internal threaded nut and the threaded section at the end of the cable body can be adjusted by rotating, so that the displacement base line can be tightened. The displacement sensor transmits the read displacement signal to the secondary instrument through the data connection line for processing, calculation and storage.

The beneficial effects of the utility model:

1. There is no need to drill special monitoring boreholes: the equipment not only completes the monitoring task, but also plays the role of the support body, avoiding the further damage to the integrity of the roof due to the special drilling of monitoring boreholes; reducing the amount of underground construction, which can avoid Affect the normal production of workers.

2. The force and deformation of the support body can be obtained: the change in the length of the connecting line of the anchor cable segment displacement base point reflects the deformation of the cable body, and then the amount of the roof separation in the monitoring area can be obtained. According to the linearity of the tension and deformation of the cable body According to the relationship, the tensile force on the cable body can be obtained, and the supporting force of the anchor cable can be obtained. The displacement indicator or mechanical displacement scale can directly display the amount of roof separation and the supporting force of the anchor cable.

3. Improved monitoring accuracy and reliability: Compared with the commonly used load cell, the displacement reading device of the instrument can accurately convert the original displacement signal into readable information on the amount of roof abscission and anchor cable support force. Real-time display by the display device can ensure high precision and long-term stability in the harsh downhole environment.

Description of drawings

A more complete and better understanding of the invention, and many of its attendant advantages, will be readily appreciated by reference to the following detailed description when considered in conjunction with the accompanying drawings, but the accompanying drawings illustrated herein are intended to provide a further understanding of the invention , constituting a part of the utility model, the exemplary embodiment of the utility model and its description are used to explain the utility model, and do not constitute an improper limitation of the utility model, wherein:

Figure 1 and Figure 2 are schematic diagrams of the overall structure of the anchor cable type roof separation indicator.

Fig. 3 is a sectional view of the cable body structure.

Fig. 4 is a structural schematic diagram of the connection between the tail end of the cable body and the displacement sensor.

Fig. 5 is a structural schematic diagram of the connection between the tail end of the cable body and the elbow type external threaded nut.

Specific implementation mode one

The utility model is described with reference to Fig. 1, Fig. 3, Fig. 5, and the anchor cable type roof detachment indicator consists of a hollow cable body 1, a displacement base point connection line 2, a tray 3, a lockset 4, a displacement reading device (connected by an internal thread) Nut 5, scale pointer 6, scale 7, elbow type external thread nut 8), the internal thread connection nut is provided with internal thread 12, the two interface ends of the elbow type external thread nut are provided with external thread 13, and the cable body tail end is provided with There are 14 external threads. The length of the cable body 1 is greater than the sum of the depth of the drill hole 9, the thickness of the tray 3, and the thickness of the lock 4, so that the tail end of the cable body is exposed to the drill hole, so as to be connected with the elbow type external thread nut 8, and ensure that the top end of the cable body 1 reaches the drill hole. Hole 9 is the deepest to ensure the anchoring quality. The connecting line of the displacement base point is welded to the top 16 of the cable body, runs through the entire hollow cable body 1, and passes through the tail end of the cable body.

During installation, push the anchor cable body 1 against the anchoring agent 15 and push it into the borehole 9. When the cable body 1 and the anchoring agent reach the deepest part of the borehole 9, the anchor rod rotating machine is connected with the external thread 14 at the end of the cable body, and the drilling rig drives the entire The anchor cable body 1 is rotated until the anchoring agent 15 is evenly stirred. After the anchoring agent 15 anchors the cable body 1, the tray 3 is inserted into the tail end of the cable body, and is compressed by the lock 4 to form an initial anchoring force. Pass the connection line 2 of the base point displacement of the tail end of the cable body through the internal thread connection nut 5 and the elbow type external thread nut 8, the internal thread connection nut 5 is threaded with the elbow type external thread nut 8, and the elbow type external thread nut 8 Carry out screw connection with the bottom end of scale 7. After straightening the connecting line of the displacement base point, the scale pointer 6 is fixed on the displacement zero scale line, and the installation of the indicator is completed. Scale 18 of scale 7 shows the size of the anchor cable support force, and scale 19 shows the amount of roof separation, and the two are linearly related.

Specific implementation mode two

The utility model is described with reference to Fig. 2, Fig. 3, Fig. 4, before installing displacement reading device, all steps of embodiment two are identical with embodiment one. The displacement reading device of Embodiment 2 is composed of an internally threaded connecting nut 5 , a displacement sensor 29 , fastening screws 17 , a secondary instrument 11 , and a data connection line 10 .

After the initial anchoring force is formed, thread the internally threaded nut 5 to the threaded section at the tail end of the cable body 1, and the displacement base point line 2 is connected to the displacement sensor 29 through the fastening screw 17, and is fastened to the large diameter end of the displacement sensor 29, and the displacement sensor The diameter of 29 large-diameter ends is greater than internal thread nut 5 inner diameters, can be stuck in internal thread nut 5 bottoms, by rotating and adjusting internal thread nut 5 and cable body 1 tail end thread section thread connection range, displacement base point line 2 can be tightened. The displacement sensor 29 transmits the read displacement signal to the secondary instrument 11 through the data connection line 10 for processing, calculation and storage.

The above is a detailed description of the utility model for those of ordinary skill in the art to understand the utility model, but it is conceivable that other changes and changes can be made without departing from the scope covered by the claims of the utility model. Modifications, these changes and modifications are all within the protection scope of the present utility model.

Claims (4)

1. An anchor cable type roof separation indicator, which is composed of a hollow core cable body, a displacement base point connection line, a tray, a lock, and a displacement reading device, and is characterized in that the cable body is hollow, and the displacement base point connection line runs through the hollow core Inside the cable body, one end is fixed to the top of the cable body, and the other end passes through the tail end of the cable body, and is connected to the displacement reading device. The displacement reading device measures the change in length of the connection line of the cable body segment displacement base point to obtain the cable body Deformation, so as to measure the amount of rock layer separation within the anchorage range of the anchor cable, and the displacement reading device can be a mechanical displacement scale or a displacement indicator. 2. A kind of anchor cable type roof separation indicator according to claim 1, characterized in that by measuring the deformation of the cable body, the linear relationship between the deformation of the cable body and the tensile force borne by the cable body is used to obtain the support of the cable body. The size of the protective force. 3. A kind of anchor cable type roof separation indicator according to claim 1, characterized in that the mechanical displacement scale is made up of a displacement conversion structure and a scale, the displacement indicator is made up of a displacement sensor and a secondary instrument, and the displacement sensor passes through The data connection line transmits the read displacement signal to the secondary instrument for processing, calculation and storage. 4. A kind of anchor cable type roof detachment indicator according to claim 1, characterized in that the mechanical displacement scale has double scales, which respectively indicate the detachment amount of the roof and the support force of the anchor cable, and the displacement indicator can display respectively Roof delamination amount and anchor cable support force.