CN107018373A - A kind of coal mine tunnel top board crack propagation image acquisition system and its acquisition method - Google Patents

Abstract

The invention relates to a coal mine roadway roof fissure expansion image acquisition system and a collection method thereof, comprising a high-definition camera capable of continuously monitoring the development process of roadway roof cracks, a high-strength transparent protective tube, an anchoring section, a fixing section and a segmented connecting rod, the high-strength The front end of the transparent protective tube is fixedly connected to the anchoring section, and the rear end is threadedly connected to the fixed section. The anchoring section is fixed to the bottom of the borehole through an anchoring agent, so as to realize the fixation of the high-strength transparent protective tube in the borehole; the high-definition camera is connected to the section Rods are flexibly connected, and can move along the high-strength transparent protective tube under the action of segmented connecting rods, or stay firmly in the high-strength transparent protective tube to monitor the development process of the crack. At this time, the fixed section is connected with the high-strength transparent protective tube, and the Tube blocked. The equipment can be used together with the roadway surrounding rock peeping instrument to collect dynamic images of specific cracks in the roof at one time for a long time, which overcomes the problem that reliable data collection cannot be performed on the dynamic expansion of cracks in the roof in actual engineering.

Description

A Coal Mine Roadway Roof Crack Expansion Image Acquisition System and Acquisition Method

technical field

The invention relates to the field of mine roadway engineering tools, in particular to a coal mine roadway roof fissure expansion image acquisition system capable of continuously collecting data on the roof crack dynamic expansion image and a collection method thereof.

Background technique

The roof of the roadway is a general term for the top of the surrounding rock of the roadway. The roof of the mining roadway, as the coal and rock mass encountered in the excavation, is a complex geological body that exists in a certain geological environment. One of its characteristics is that the coal and rock body contains various cracks such as joints and beddings, which makes the coal and rock mass become unsightly. continuum. Cracks will expand due to images of complex environments such as high stress in the surrounding rock of the roadway and mining stress. The expansion mode and scale of the cracks determine the deformation and failure characteristics of the roadway roof to a large extent. Therefore, how to obtain the images of the dynamic expansion process of the roof cracks in a timely and effective manner is a key to grasp the crack expansion and the deformation and failure laws of the roof surrounding rock.

At present, the commonly used image acquisition of surrounding rock fissures is the roadway surrounding rock peeping instrument. The peeping instrument uses the peeping probe to go deep into the borehole for data collection. However, this method has two obvious problems: one is that the surrounding rock borehole lacks strong protection. , Borehole collapse often occurs in weak and broken surrounding rocks, which seriously affects the entry of the peeping probe and affects data collection; secondly, due to the limitation of the power of the peeping instrument itself, the effective position of the probe is fixed, etc., the peeping instrument is very difficult to detect. It is difficult to fix at a specific location for long-term data collection. Due to the limitations of these two problems, it is not only time-consuming and labor-intensive to use the peeping instrument to collect data on the cracks in the surrounding rock of the borehole, but also cannot carry out continuous data collection on the dynamic expansion of cracks for a long time, only the cracks at a certain point in time In this way, the basis for grasping the law between crack expansion and surrounding rock failure characteristics will be lost.

To sum up, the problem of image acquisition in the process of dynamic expansion of roadway surrounding rock cracks has not been solved, which is a serious shortcoming for solving related scientific problems based on this, so this problem urgently needs to be solved.

Contents of the invention

In order to solve the technical problem of image acquisition of dynamic expansion of cracks in the roof of the roadway, the present invention provides a coal mine roadway roof crack expansion image acquisition system and its acquisition method that can continuously collect data on the dynamic expansion images of roof cracks.

The technical solution of the present invention to solve the above technical problems is: a coal mine roadway roof fissure expansion image acquisition system, including a high-definition camera capable of continuously monitoring the development process of roadway roof cracks, a high-strength transparent protective tube, an anchoring section, a fixed section and a segmented connecting rod , the front end of the high-strength transparent protective tube is fixedly connected to the anchoring section, the rear end is threadedly connected to the fixed section, and the anchoring section is fixed to the bottom of the borehole by an anchoring agent, so as to realize the fixing of the high-strength transparent protective tube in the borehole; the high-definition camera It is flexibly connected with the segmented connecting rod, and can move along the high-strength transparent protective tube under the action of the segmented connecting rod, or be firmly placed in the high-strength transparent protective tube to monitor the development process of the crack. At this time, the fixed section and the high-strength transparent protective tube Connect and block its tube body.

The diameter of the elastic shell is slightly larger than the inner diameter of the high-strength transparent tube, and has the ability to rebound after being compressed, so as to ensure that the high-definition camera is firmly stuck in any position of the high-strength transparent protective tube.

The high-definition camera includes a camera body, a battery, an elastic housing and a connection end; the elastic housing is a cylindrical structure with one end sealed and one end open, and the connection end is arranged outside the sealing end; in the cavity of the elastic housing, A battery is installed at the sealed end, a camera body is installed at the open end, and the battery supplies power to the camera body.

A battery chamber is arranged in the cavity of the sealing end of the elastic shell, a camera chamber is arranged at the opening end, and the two chambers are relatively independent; a conductive interlayer is arranged on the top surface and the bottom surface of the battery chamber, the upper conductive interlayer is connected to the positive line, and the lower conductive interlayer is connected to the positive electrode line. Negative wire, the other end of the positive and negative wires are respectively connected to the positive and negative poles of the camera body, and the middle part is coated with insulating glue; the bottom surface of the camera room is provided with elastic washers, and the camera body is installed in the camera room.

The camera body has its own power supply and memory.

The camera body has a micro LED light, which provides light for the camera in a dark environment to ensure its normal operation. The micro-LED lamp is a thin conductive material circle layer, and 8 LED lamps are embedded inside it.

The high-strength transparent protective tube is a section of high-strength, transparent quartz glass tube with a scale. On the one hand, it can be inserted into the drill hole to protect the drill hole from collapsing and provide a stable shooting space for the high-definition camera; on the other hand, it can adjust the crack width. Take measurements.

The high-strength transparent protective tube, the anchoring section and the fixing section are connected to form a combined rod body of equal diameter.

The high-definition camera is threadedly connected to the segmented connecting rod through the connecting end; each section of the segmented connecting rod is threadedly connected.

The fixed section is connected with the rock bolter.

The invention is equipped with a surrounding rock peeping instrument, which is used to detect cracks in the roof and provides a basis for the installation and positioning of the high-definition camera.

A method for collecting an image collection system for the expansion of cracks in the roof of a coal mine roadway, the steps of which are as follows:

1) Use a bolter drill to excavate holes at a suitable position on the roof of the roadway, and then clean the holes;

2) Insert the anchoring section into the non-threaded end of the high-strength transparent glass tube and fix it firmly with 502 glue, screw the fixed section into the threaded end of the high-strength transparent glass tube and fix it firmly;

3) Put the anchoring agent into the drill hole, use the combined rod assembled in step 2 to push the anchoring agent into the bottom of the drilling hole, then insert the fixed section into the anchor drilling rig, and start the drilling rig to rotate and crush the anchoring agent for anchoring installation;

4) Remove the drilling rig, unscrew the fixed section, insert the roadway surrounding rock peep camera into the high-strength transparent glass tube to find a suitable observation crack and mark the position depth;

5) Connect the high-definition camera and the segmented connecting rod through threads, use the segmented connecting rod to push the high-definition camera into the high-strength transparent glass tube to the position marked in step 4, and unscrew the segmented connecting rod;

6) Re-tighten the fixed section, and the installation of the image acquisition system for the expansion of cracks on the roof of the coal mine roadway is completed.

7) After three days, take out the high-definition camera using the segmented connecting rod, replace the built-in memory card, organize the collected data, and continue to the next step of data collection.

The beneficial effects of the present invention are: the structural design is reasonable, easy to be understood and installed and applied on site; the device can collect dynamic images of specific cracks in the roof for a long time during the use process of the equipment in conjunction with the roadway surrounding rock peeping instrument, which overcomes the inability in actual engineering The problem of reliable data collection for the dynamic expansion of roof cracks; the whole set of equipment is easy to operate, and data collection can be performed by itself after installation without excessive time-consuming and labor-intensive.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a structural schematic diagram of the present invention when a high-definition camera is installed.

FIG. 3 is a schematic structural diagram of the high-definition camera of the present invention.

FIG. 4 is a schematic diagram of the internal structure of the high-definition camera of the present invention.

Fig. 5 is a schematic diagram of the connection between the high-definition camera and the segmented connecting rod in the present invention.

Fig. 6 is a schematic diagram of the connection structure of the anchoring section, the high-strength transparent protective tube and the fixing section in the present invention.

In the figure, 1. Anchoring section, 2. High-strength transparent protective tube, 3. Fixed section, 4. Segmented connecting rod, 5. HD camera, 5-1. Elastic shell, 5-11. Battery chamber, 5-12 .Camera room, 5-13. Conductive interlayer, 5-14. Elastic gasket, 5-2. Connecting end, 5-3. Camera body, 5-31. Camera lens, 5-32. LED light, 5-4. Battery, 5-5. Positive wire, 5-6. Negative wire, 6. Drilling.

detailed description

The present invention will be described in detail below in conjunction with accompanying drawing 1 and specific embodiments.

As shown in Figures 1 and 2, a coal mine roadway roof crack expansion image acquisition system includes a high-definition camera 5 that can continuously monitor the development process of roadway roof cracks, a high-strength transparent protective tube 2, an anchoring section 1, a fixed section 3 and a segmented The connecting rod 4, the front end of the high-strength transparent protective tube 2 is fixedly connected with the anchoring section 1, and the rear end is threadedly connected with the fixed section 3, and the anchoring section 1 is fixed to the bottom of the drilling hole 6 through an anchoring agent, so that the high-strength transparent protective tube 2 is drilled Fixation in the hole 6; the high-definition camera 5 is flexibly connected to the segmented connecting rod 4, and can move along the high-strength transparent protective tube 2 under the action of the segmented connecting rod 4, or be firmly placed in the high-strength transparent protective tube 2, The development process of the fissure is monitored. At this time, the fixed section 3 is connected with the high-strength transparent protective tube 2 to block the tube body. The high-strength transparent protective tube 2 is a section of high-strength, transparent quartz glass tube with a scale. On the one hand, inserting the drill hole 6 can protect the drill hole from collapsing and provide a stable shooting space for the high-definition camera 5; on the other hand, it can The crack width is measured. The high-strength transparent protective tube 2, the anchoring section 1 and the fixing section 3 are connected to form a combined rod body of equal diameter. The fixed section is connected with the rock bolter.

As shown in Figure 3 and Figure 4, the diameter of the elastic casing 5-1 is slightly larger than the inner diameter of the high-strength transparent tube 2, and has the ability to rebound after being compressed, so as to ensure that the high-definition camera 5-1 is firmly stuck in the high-strength transparent protection tube. Any position of tube 2.

The high-definition camera 5-1 includes a camera body 5-3, a battery 5-4, an elastic housing 5-1 and a connection end 5-2; the elastic housing 5-1 is a cylindrical structure, and one end is sealed, One end is open, and the connecting end 5-2 is arranged outside the sealing end; in the cavity of the elastic shell 5-1, a battery 5-4 is installed at the sealing end, and a camera body 5-3 is installed at the opening end, and the battery 5-4 is the camera body 5-3 power supply. The camera body 5-3 may also have its own power supply. Described camera body 5-3 has miniature LED light 5-32, provides light to guarantee its normal work for camera in dark environment. The micro LED lamp 5-32 is a thin conductive material ring layer, and 8 LED lamps are inlaid inside it.

A battery chamber 5-11 is arranged in the sealed end cavity of the elastic housing 5-1, a camera chamber 5-12 is arranged at the open end, and the two chambers are relatively independent; a conductive interlayer 5-11 is arranged on the top surface and the bottom surface of the battery chamber 5-11. 13. The upper conductive interlayer 5-13 is connected to the positive wire 5-5, the lower conductive interlayer 5-13 is connected to the negative wire 5-6, and the other ends of the positive and negative wires 5-5 and 5-6 are respectively connected to the camera body 5- 3's positive and negative poles, the middle part is coated with insulating glue; the bottom surface of the camera chamber 5-12 is provided with an elastic washer 5-14, and the camera body 5-3 is installed in the camera chamber 5-12.

As shown in FIG. 5 , the high-definition camera 5 is threadedly connected to the segmented connecting rod 4 through the connecting end 5 - 2 ; each section of the segmented connecting rod 4 is threadedly connected. The connection end 5-2 of described high-definition camera 5 has internal thread; One end of segmental connecting rod 4 is provided with internal thread, and the other end is provided with external thread, and each section rod body is threadedly connected, and by its external thread end and high-definition camera 5 connections.

As shown in Figure 6, one end of the anchoring section 4 is provided with an external thread, and the other is a light rod structure; one end of the high-strength transparent protective tube 2 is provided with an internal thread, and the other end is a light pipe structure; the fixed section 3 It is a two-stage variable-diameter rod body, and both rod bodies are provided with external threads; the external thread end of the anchoring section 1 is the same as the outer diameter of the high-strength transparent protective tube 2, and the polished rod end is inserted into the bare tube end of the high-strength protective tube 2. Connect; the thinner section of the fixed section 3 is connected with the internal thread end of the high-strength transparent protective tube 2, and the thicker end is connected with the drilling rig.

The invention is equipped with a surrounding rock peeping instrument, which is used to detect cracks in the roof and provides a basis for the installation and positioning of the high-definition camera.

A method for collecting an image collection system for the expansion of cracks in the roof of a coal mine roadway, the steps of which are as follows:

1) Use the bolter to excavate the hole at a suitable position on the roof of the roadway, and then clean the hole 6;

2) Insert the anchor section 1 into the non-threaded end of the high-strength transparent glass tube 2 and fix it firmly with 502 glue, screw the fixed section 3 into the threaded end of the high-strength transparent glass tube 2 and fix it firmly;

3) Put the anchoring agent into the borehole 6, use the combined rod assembled in step 2 to push the anchoring agent into the bottom of the borehole 6, then insert the fixed section 3 into the anchor drilling rig, and start the drilling rig to rotate and crush the anchoring agent for anchoring installation;

4) Remove the drilling rig, unscrew the fixed section 3, insert the roadway surrounding rock peep camera into the high-strength transparent glass tube 2 to find a suitable observation crack and mark the position depth;

5) Connect the high-definition camera 5 and the segmented connecting rod 4 through threads, use the segmented connecting rod 4 to push the high-definition camera into the high-strength transparent glass tube 2 to the position marked in step 4, and unscrew the segmented connecting rod 4;

6) Re-tighten the fixed section 3, and the installation of the image acquisition system for the expansion of cracks on the roof of the coal mine roadway is completed.

7) After three days, take out the high-definition camera 5 using the segmented connecting rod 4, replace the built-in memory card, organize the collected data, and continue to the next step of data collection.

Claims (10)

1. A coal mine roadway roof fissure expansion image acquisition system, characterized in that it includes a high-definition camera capable of continuously monitoring the development process of roadway roof fissures, a high-strength transparent protective tube, an anchoring section, a fixed section and a segmented connecting rod, the high-strength transparent The front end of the protective tube is fixedly connected to the anchoring section, and the rear end is threadedly connected to the fixed section, and the anchoring section is fixed to the bottom of the borehole through an anchoring agent to realize the fixing of the high-strength transparent protective tube in the borehole; the high-definition camera and the segmented connecting rod The flexible connection can move along the high-strength transparent protective tube under the action of the segmented connecting rod; or it can be firmly left in the high-strength transparent protective tube to monitor the development of the crack. At this time, the fixed section is connected with the high-strength transparent protective tube, and the tube body blockage. 2. A coal mine roadway roof fissure expansion image acquisition system according to claim 1, characterized in that the diameter of the elastic shell is slightly larger than the inner diameter of the high-strength transparent tube, and has the ability to rebound after compression, ensuring that the high-definition camera It is firmly stuck in any position of the high-strength transparent protective tube. 3. A coal mine roadway roof crack expansion image acquisition system according to claim 1, wherein the high-definition camera includes a camera body, a battery, an elastic housing and a connection end; the elastic housing is cylindrical One end is sealed, one end is open, and the connecting end is arranged outside the sealing end; in the cavity of the elastic shell, a battery is installed at the sealing end, and a camera body is installed at the opening end, and the battery supplies power to the camera body. 4. A coal mine roadway roof crack expansion image acquisition system according to claim 3, characterized in that a battery chamber is arranged in the sealed end cavity of the elastic housing, a camera chamber is arranged at the open end, and the two chambers are relatively independent; The top and bottom surfaces of the battery chamber are provided with conductive interlayers, the upper conductive interlayer is connected to the positive wire, the lower conductive interlayer is connected to the negative wire, and the other ends of the positive and negative wires are respectively connected to the positive and negative poles of the camera body, and the middle part is coated with insulating glue; An elastic washer is arranged on the bottom surface of the camera room, and the camera body is installed in the camera room. 5. A kind of coal mine roadway roof fissure expansion image acquisition system according to claim 3, is characterized in that, described camera body has miniature LED lamp, provides light for camera in dark environment and guarantees its normal operation, and described Micro LED lights are a thin circle of conductive material with 8 LED lights embedded inside. 6. A coal mine roadway roof fissure expansion image acquisition system according to claim 3, characterized in that, the high-definition camera is threadedly connected to the segmented connecting rod through the connecting end; each segment of the segmented connecting rod is threadedly connected. 7. A coal mine roadway roof fissure expansion image acquisition system according to claim 1, characterized in that the high-strength transparent protective tube is a section of high-strength, transparent quartz glass tube with a scale, on the one hand inserted The borehole can protect the borehole from collapsing and provide a stable shooting space for the high-definition camera; on the other hand, it can measure the width of the crack. 8 . The image acquisition system for the expansion of cracks on the roof of coal mine roadway according to claim 1 , wherein the high-strength transparent protective tube, the anchoring section and the fixing section are connected to form a combined rod body of equal diameter. 9 . The image acquisition system for the expansion of fissures on the roof of coal mine roadway according to claim 1 , wherein the fixed section is connected to a bolter. 10 . 10. The method for image acquisition using a coal mine roadway roof crack expansion image acquisition system according to any one of claims 1-9, wherein the specific steps are: 1) Use a bolter drill to excavate holes at a suitable position on the roof of the roadway, and then clean the holes; 2) Insert the anchoring section into the non-threaded end of the high-strength transparent glass tube and fix it firmly with 502 glue, screw the fixed section into the threaded end of the high-strength transparent glass tube and fix it firmly; 3) Put the anchoring agent into the drill hole, use the combined rod assembled in step 2 to push the anchoring agent into the bottom of the drilling hole, then insert the fixed section into the anchor drilling rig, and start the drilling rig to rotate and crush the anchoring agent for anchoring installation; 4) Remove the drilling rig, unscrew the fixed section, insert the roadway surrounding rock peep camera into the high-strength transparent glass tube to find a suitable observation crack and mark the position depth; 5) Connect the high-definition camera and the segmented connecting rod through threads, use the segmented connecting rod to push the high-definition camera into the high-strength transparent glass tube to the position marked in step 4, and unscrew the segmented connecting rod; 6) Re-tighten the fixed section to complete the installation of the coal mine roadway roof crack expansion image acquisition system; 7) After three days, take out the high-definition camera using the segmented connecting rod, replace the built-in memory card, organize the collected data, and continue to the next step of data collection.