Retreating borehole imager for mining and method of use

Abstract

The present application relates to the field of borehole imaging, and discloses a mine-used retreating borehole imaging instrument and a use method thereof. The borehole imaging instrument comprises a main machine, a probe connected with the main machine through a cable, a probe protection cover, a probe limiter and a cable winder. The probe limiter is screwed on the tail of the probe, used for centering the probe in the borehole, and the cable connected with the probe penetrates the probe limiter. The probe protection cover comprises a buffer cover, a pollution collection net arranged at the bottom of the buffer cover and a pollution cleaning claw arranged at the other end of the pollution collection net. The pollution cleaning claw is in contact with the inner wall of the borehole, and the buffer cover is sleeved on the head of the probe, used for protecting the probe when the probe is pushed into the borehole. The cable winder is used for winding the cable, and controls the cable to pull the probe out of the borehole at a constant speed. The present application realizes cleaning of the borehole and protection of the lens of the probe during the process of the probe entering the hole, and realizes uniform exit of the probe during the process of the probe retreating from the hole. The present application has the advantages of high borehole imaging definition and high measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of borehole imaging, and more particularly to a mine-use backward-retreating borehole imaging device and its method of use. Background Technology

[0002] Mining borehole imaging instruments are capable of directly observing various underground structures and revealing the development and deformation of joints, faults, and fissures in the surrounding rock of coal seams and roadways. They can also predict the development trend of underground disasters such as roof delamination and collapse, and roadway instability, providing a basis for roadway support and roof management.

[0003] Currently, the main operating steps of a borehole imaging device are as follows: First, drill a borehole according to construction requirements; then connect the probe, depth counter, and main unit via a signal cable; next, turn on the main unit power and insert the borehole imaging device probe into the borehole; finally, slowly push the probe into the borehole and observe the rock strata at different depths on the main unit. The main problems with existing borehole imaging devices are:

[0004] 1. The probe advancement is mostly operated manually, and the advancement speed is unstable, which can easily lead to discontinuous imaging;

[0005] 2. The probe cannot be centered, and it is easy for the probe to hit the hole wall during advancement, resulting in probe damage;

[0006] 3. During the probe advance process, rock and coal powder or water stains in the borehole can easily accumulate on the upper edge of the probe, resulting in blurred lens imaging and seriously affecting the viewing efficiency.

[0007] Currently, some scholars have also conducted research on borehole imaging instruments for mining, such as:

[0008] Patent number CN202023037252.1 proposes a probe anti-fouling device for a mining borehole imaging instrument, which uses a motor-driven cleaning claw to clean the lens. However, its structure is complex and requires a motor drive. The cleaning effect of the reciprocating cleaning component will decrease after multiple cleanings.

[0009] The patent number CN201911424732.2 proposes an automatic probe drilling imaging instrument for mining. Although it can realize the automatic advancement of the probe rod and the uniform speed of the probe rod, the rod rod angle is difficult to adjust and the probe is easily damaged when the motor drives the probe to jam.

[0010] Based on this, the present invention provides a mining retractable borehole imager with simple structure, high borehole imaging clarity, and high measurement accuracy, which realizes the cleaning of the borehole and protection of the probe lens during the probe entry process, and the uniform speed withdrawal for acquisition and imaging during the retraction process. Summary of the Invention

[0011] The present application aims to solve the technical problems existing in the prior art. To this end, the present application provides a mine rearward drilling imaging instrument with simple structure, high drilling imaging clarity and high measurement accuracy, which realizes cleaning of the drilling hole during the probe entering the hole, protection of the lens of the probe, and uniform speed withdrawal during the probe withdrawing from the hole.

[0012] The technical solution adopted by the present application to solve its technical problems is:

[0013] In a first aspect, a mine rearward drilling imaging instrument is provided, comprising a host, a probe in communication connection with the host through a cable, a probe protection cover, a probe limiter and a cable take-up device; the probe limiter is screwed to the tail of the probe to make the probe be in a centered position in the drilling hole, and the cable connected to the probe penetrates through the probe limiter; the probe protection cover comprises a buffer cover, a pollution collection net arranged at the bottom of the buffer cover and a pollution cleaning claw arranged at the other end of the pollution collection net, the pollution cleaning claw is in contact with the inner wall of the drilling hole, the buffer cover is sleeved on the head of the probe to protect the probe when the probe is pushed into the drilling hole, and the buffer cover is separated from the probe when the probe retreats and the pollution cleaning claw grabs the inner wall of the drilling hole; the cable take-up device is used to wind the cable and control the cable to pull the probe out of the drilling hole at a uniform speed; after the probe is separated from the probe protection cover, the imaging data in the drilling hole is collected in real time until the probe completely exits the drilling hole.

[0014] In some optional embodiments, the host is further provided with a cable metering module, the cable metering module comprises a metering wheel and a pressure wheel arranged on the side of the host, and a metering module arranged in the host, the rotating shaft of the metering wheel is connected to the metering module, and the metering module is used to record the number of revolutions of the metering wheel and convert the number of revolutions into the length of the cable.

[0015] In some optional embodiments, the side of the host is further provided with a guide wheel at the wire inlet end of the pressure wheel and the wire outlet end of the metering wheel.

[0016] In some optional embodiments, the top of the buffer cover is hemispherical and made of foaming material, and the bottom of the buffer cover is provided with a counterbore sleeved on the probe.

[0017] In some optional embodiments, the pollution collection net is a horn-shaped net woven by elastic steel wires, and the radial steel wires protrude from one end away from the buffer cover to form the pollution cleaning claw.

[0018] In some optional embodiments, the outer wall of the probe limiter is respectively provided with two groups of limiting rollers near the two ends thereof, each group of limiting rollers comprises two limiting rollers arranged on the two sides of the probe limiter, and the two groups of limiting rollers are arranged at 90°.

[0019] In some optional embodiments, the probe limiter is provided with a receiving groove, each limiting roller is hinged in the receiving groove through a support, and a torsional spring is arranged on the hinge shaft.

[0020] In some optional embodiments, the take-up device is a take-up device with a built-in small motor, the take-up device is electrically connected to the host computer, the host computer controls the operation of the take-up device, the cable is wound on the take-up device, and the cable is a flexible tensile cable.

[0021] In some optional embodiments, a probe rod is further included, the probe rod is formed by screwing a plurality of short rods, and the probe rod is used to push the probe into the borehole.

[0022] In a second aspect, a use method of the mine retreating borehole imaging instrument is provided, and the mine retreating borehole imaging instrument is used according to the following steps:

[0023] S1, assembling the borehole imaging instrument, sleeving the probe protection cover on the head of the probe, and sending the probe into the borehole from the borehole opening by using the probe rod, the host computer recording the depth of the probe entering the borehole in real time during the process of sending the probe into the borehole;

[0024] S2, when the probe is sent to the bottom of the borehole, starting the take-up device, the probe being pulled out at a uniform speed under the action of the cable, at this time, the probe protection cover is separated from the probe and left at the bottom of the hole, the probe starts to collect imaging data in the hole in real time under the action of the position limiter, and the host computer fits the imaging data and the hole depth until the probe completely exits the borehole;

[0025] S3, collecting the borehole imaging instrument.

[0026] Compared with the prior art, the beneficial effects of the present application are as follows: the probe protection cover is used to protect the probe, the lens of the probe can be effectively protected during the process of sending the probe into the borehole, the probe protection cover can also be used to clean the hole, and a relatively clean environment is provided for the probe to retreat and collect imaging data; the drill bit is pulled out at a uniform speed by using the take-up device, the imaging is coherent and high in quality, the clarity of the borehole imaging and the accuracy of the measurement are ensured, and the drill bit can keep the central position under the action of the probe position limiter, so that the drill bit is prevented from touching the hole wall and causing damage to the probe. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Figure 1 is a structural schematic diagram of the mine retreating borehole imaging instrument provided by the present application;

[0029] Figure 2 is a structural diagram of the probe protection cover provided by the present application;

[0030] Figure 3 This is a structural diagram of a preferred embodiment of the probe limiter provided by the present invention;

[0031] Figure 4 This is a structural diagram of the probe limiter provided by the present invention in another preferred embodiment;

[0032] Figure 5 yes Figure 1 Side view of the metering wheel, pressure wheel, and guide wheel on the main unit.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1—Main unit, 1.1—Meter wheel, 1.2—Pressure wheel, 1.3—Guide wheel, 2—Probe, 3—Probe protective cover, 3.1—Buffer cover, 3.1.1—Counterhole, 3.2—Sludge collection net, 3.2.1—Sludge cleaning claw, 4—Probe limiter, 4.0—Receiving groove, 4.1—Limiting roller, 4.2—Bracket, 4.3—Torsion spring, 5—Cable retractor, 6—Cable, 7—Probe rod. Detailed Implementation

[0035] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0039] Embodiment one

[0040] As shown in the accompanying drawings, Figure 1 The embodiment provides a mine retreating type borehole imaging instrument, which comprises a host computer 1, a probe 2, a probe protective cover 3, a probe limiter 4 and a take-up device 5, wherein:

[0041] The host computer 1 is communicatively connected with the probe 2 through a cable 6, the host computer 1 is integrated with an image acquisition module and a battery module, the image acquisition module is communicatively connected with the probe 2 through the cable 6, and the battery module supplies power for the host computer.

[0042] The probe limiter 4 is screwed on the tail of the probe 3 and is used for keeping the probe in a central position in the borehole, and the cable 6 connected with the probe penetrates through the probe limiter 4. Figure 3 As shown in the accompanying drawings, The outer wall of the probe limiter 4 is provided with two groups of limiting rollers near two ends thereof respectively, each group of limiting rollers comprises two limiting rollers 4.1 arranged on the two sides of the probe limiter, and the two groups of limiting rollers are arranged at 90°. The design utilizes the rolling contact between the limiting rollers and the inner wall of the borehole, so that the probe is relatively smooth in the process of entering and retreating from the borehole, and the resistance is small. Meanwhile, the probe limiter can keep the probe in the central position in the borehole in the process of entering and retreating from the borehole, and can effectively prevent the probe from being damaged due to collision and scraping with the inner wall of the borehole.

[0043] Figure 2As shown in the drawings, the probe protective cover 3 comprises a buffer cover 3.1, a dirt collecting net 3.2 arranged at the bottom of the buffer cover, and a dirt cleaning claw 3.2.1 arranged at the other end of the dirt collecting net. The buffer cover 3.2 is sleeved on the head of the probe 2, and is used for protecting the probe when the probe is pushed into the borehole. The dirt cleaning claw 3.2.1 is in contact with the inner wall of the borehole, and when the probe retreats, the dirt cleaning claw is used to grab the inner wall of the borehole to separate the probe protective cover from the probe. After the probe is separated from the probe protective cover, the imaging data in the borehole is collected in real time until the probe completely exits the borehole. Preferably, the top of the buffer cover 3.1 is semispherical, is made of foaming material, and is provided with a counterbore 3.1.1 sleeved with the probe 2. The dirt collecting net 3.2 is a horn-shaped net woven by elastic steel wires, and the radial steel wires protrude from one end of the buffer cover to form the dirt cleaning claw 3.2.1. The probe protective cover designed in the embodiment can form a protection for the lens of the probe by the buffer cover, and can effectively prevent the rock and coal powder or water stains in the borehole from accumulating on the probe during the process of pushing the probe into the borehole, thereby affecting the imaging effect. The dirt collecting net and the dirt cleaning claw formed thereby can clean the foreign matters attached to the inner wall of the borehole during the process of pushing the probe into the borehole, collect the foreign matters in the dirt collecting net, and push the foreign matters to the bottom of the borehole, so as to clean a relatively clean imaging environment for the probe when the probe retreats.

[0044] As shown in the drawings, Figure 1 The cable take-up device 5 is used for winding the cable 6, and controls the cable to pull the probe out of the borehole at a constant speed. Preferably, the cable take-up device 5 is a small-sized cable take-up device with a built-in motor. The cable take-up device 5 is electrically connected to the host computer 1, and is controlled by the host computer to work. The cable 6 is wound on the cable take-up device 5, and the cable 6 is a flexible and anti-tension cable.

[0045] As shown in the drawings, Figure 1 and the drawings, Figure 5 The host computer 1 is further provided with a cable metering module. The cable metering module comprises a metering wheel 1.1 and a pressure wheel 1.2 arranged on the side surface of the host computer 1, and a metering module arranged in the host computer 1. The rotating shaft of the metering wheel 1.1 is connected to the metering module. The metering module is used for recording the number of revolutions of the metering wheel 1.1, and converting the number of revolutions into the length of the cable. Preferably, the side surface of the host computer 1 is further provided with a guide wheel 1.3 at the wire inlet end of the pressure wheel 1.2 and the wire outlet end of the metering wheel 1.1.

[0046] As shown in the drawings, Figure 1 The mine retreat-type borehole imaging instrument further comprises a probe rod 7. The probe rod 7 is composed of a plurality of short rods which are screwed together, and is used for pushing the probe into the borehole.

[0047] The use method of the mine retreat-type borehole imaging instrument is as follows:

[0048] S1. Assemble the borehole imaging device, put the probe protective cover on the head of the probe, and use the probe rod to send the probe into the borehole. During the sending process, the main unit records the depth of the probe entering the borehole in real time.

[0049] S2, when the probe is sent to the bottom of the borehole, start the take-up device. The probe is pulled out at a constant speed under the action of the cable. At this time, the probe protective cover separates from the probe and remains at the bottom of the hole. Under the action of the limiter, the probe begins to collect imaging data in the hole in real time. The host fits the imaging data with the hole depth until the probe is completely withdrawn from the borehole.

[0050] S3, Drilling data acquisition is complete; put away the borehole imaging device.

[0051] Example 2

[0052] The only difference between this embodiment and Embodiment 1 is the probe limiter, as shown in the attached diagram. Figure 4 As shown, in this embodiment, the probe limiter 4 has a receiving groove 4.0, and each limiting roller 4.1 is hinged to the receiving groove 4.0 via a bracket 4.2, with a torsion spring 4.3 on the hinge shaft. This probe limiter can meet the limiting requirements of drilling holes of various diameters and is highly applicable.

[0053] It is worth noting that the probe rod and the probe limiter can be detachably connected (such as screwed) or not connected. The advantage of not being connected is that the probe rod can be pulled out after the probe is sent to the bottom of the hole.

[0054] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A mining-use retractable borehole imaging device, comprising a main unit and a probe connected to the main unit via a cable for communication; characterized in that: It also includes a probe protective cover, a probe limiter, and a take-up reel, among which: The probe limiter is screwed to the tail of the probe to keep the probe in a centered position inside the borehole, and the cable connecting the probe passes through the probe limiter. The probe protective cover includes a buffer cover, a dirt collection net at the bottom of the buffer cover, and a dirt cleaning claw at the other end of the dirt collection net. The dirt cleaning claw contacts the inner wall of the borehole. The buffer cover is fitted onto the head of the probe and is used to protect the probe when it is pushed into the borehole. When the probe is retracted, the dirt cleaning claw grabs the inner wall of the borehole to separate the probe protective cover from the probe. The take-up device is used to wind up the cable and control the cable to pull the probe out of the hole at a uniform speed. After the probe is separated from the probe protective cover, it begins to collect imaging data inside the borehole in real time until the probe is completely removed from the borehole. The main unit is also equipped with a cable metering module, which includes a metering wheel and a pressure wheel located on the side of the main unit, and a metering module located inside the main unit. The rotating shaft of the metering wheel is connected to the metering module, and the metering module is used to record the number of rotations of the metering wheel and convert the number of rotations into the length of the cable. The outer wall of the probe limiter is provided with two sets of limiting rollers near its two ends. Each set of limiting rollers includes two limiting rollers on both sides of the probe limiter. The two sets of limiting rollers are offset by 90°. The probe limiter has a receiving groove, and each limiting roller is hinged to the receiving groove by a bracket, and a torsion spring is provided on the hinge shaft.

2. The mining retractable borehole imaging device according to claim 1, characterized in that: The main unit is also equipped with guide wheels on both the inlet end of the pressure roller and the outlet end of the meter counting roller.

3. The mining retractable borehole imaging device according to claim 1, characterized in that: The top of the buffer cover is hemispherical and made of foam material, and its bottom has a countersunk hole that fits into the probe.

4. The mining retractable borehole imaging device according to claim 1, characterized in that: The sludge collection net is a trumpet shape woven from elastic steel wire, with the radial steel wires protruding from the end away from the buffer cover to form the sludge cleaning claw.

5. The mining retractable borehole imaging instrument according to claim 1, characterized in that: The take-up device is a take-up device with a built-in small motor. The take-up device is electrically connected to the host, and the host controls the operation of the take-up device. The cable is wound around the take-up device, and the cable is a flexible tensile cable.

6. The mining retractable borehole imaging device according to any one of claims 1 to 5, characterized in that: It also includes a probe rod, which is made up of multiple short rods screwed together, used to push the probe into the borehole.

7. A method of using a mining retractable borehole imaging device, characterized in that: Use the mining retractable borehole imaging device according to claim 6 according to the following steps: S1. Assemble the borehole imaging device, put the probe protective cover on the head of the probe, and use the probe rod to send the probe into the borehole. During the sending process, the main unit records the depth of the probe entering the borehole in real time. S2, when the probe is sent to the bottom of the borehole, start the take-up device. The probe is pulled out at a constant speed under the action of the cable. At this time, the probe protective cover separates from the probe and remains at the bottom of the hole. Under the action of the limiter, the probe begins to collect imaging data in the hole in real time. The host fits the imaging data with the hole depth until the probe is completely withdrawn from the borehole. S3, Drilling data acquisition is complete; put away the borehole imaging device.

Images