CN117967287A - Underground coal mine drilling depth re-measurement device and method - Google Patents
Underground coal mine drilling depth re-measurement device and method Download PDFInfo
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- CN117967287A CN117967287A CN202410005333.7A CN202410005333A CN117967287A CN 117967287 A CN117967287 A CN 117967287A CN 202410005333 A CN202410005333 A CN 202410005333A CN 117967287 A CN117967287 A CN 117967287A
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- 238000005553 drilling Methods 0.000 title claims abstract description 58
- 239000003245 coal Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005259 measurement Methods 0.000 title abstract description 23
- 238000013102 re-test Methods 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000005693 optoelectronics Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 10
- 238000003825 pressing Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000011888 foil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a coal mine underground drilling depth retest device and a method, the device comprises a shell, a tray is arranged in the bottom of the shell, a jack is arranged between the tray and the bottom wall of the shell, a side wing plate is arranged on the tray, a slide rail seat and a spring are sequentially arranged in the side wing plate from top to bottom, and a strain gauge is arranged on the slide rail seat; the top of the shell is internally provided with a roller, a space between the roller and the sliding rail seat is used for arranging a push rod, and the roller is arranged in the shell through a fixed seat, a support rod and a roller rotating shaft; the roller shaft is connected with a photoelectric encoder. According to the invention, the push rod can be pressed through the structure, the pressure born by the push rod can be monitored in real time, the push rod is ensured to be always kept in a pressed state in the measuring process, the push rod is prevented from slipping, and the accuracy and the precision of measured data are ensured. In addition, after the average value of the depth data output by the two photoelectric encoders is taken, the measurement precision is further improved in terms of numerical processing.
Description
Technical Field
The invention belongs to the technical field of coal mining, relates to drilling depth measurement, and in particular relates to a device and a method for measuring underground drilling depth of a coal mine.
Background
The complex coal seam occurrence condition brings serious threat to the coal mine safety production, and how to prevent mine disasters occurring in the production process and improve the production efficiency becomes a bottleneck for restricting the coal mine safety and high-efficiency exploitation. The underground tunnel drilling of the coal mine is used as the most direct and effective means to play a key role in aspects of mine disaster prevention, hidden disaster-causing geological factor exploration, coal bed gas resource development and the like, meanwhile, as the construction strength of transparent working faces of various mines is increased year by year, the application of geophysical prospecting technology in holes drilled by the tunnel is more and more extensive, and the situation that a large number of conventional drilling holes or directional drilling holes are required to be constructed for all the coal mines is caused.
During drilling operations, a constructor typically calculates the depth of the borehole by combining the length of the individual drill pipe and counting the number of drill pipes fed into the borehole. The manual drill rod counting mode has the advantages of poor measurement precision, low automation degree and easiness in error. And the drilling depth is closely related to the engineering quantity, the construction party usually settles according to the engineering quantity and the mining party, and the authenticity of the drilling depth calculated according to the number of drill rods is difficult to verify. In addition, for geophysical prospecting drilling holes to be subjected to geological exploration, geological information acquired after a detecting instrument is sent into the drilling holes must correspond to the depth of the drilling holes accurately so as to reflect real geological information. Therefore, the repeated measurement of the drilling depth is indispensable after the drilling construction is finished, and the accurate measurement of the drilling depth has important significance for guaranteeing the construction quality, detecting the geological information and settling the engineering.
Detection in a borehole of a coal mine downhole often requires that a probe portion with a sensor or data acquisition device mounted therein be fed into the borehole interior for measurement. For medium-length deep drilling with the depth of more than 150 meters, a drilling machine is used for connecting a drill rod pushing probe for measurement. Measurements are often made for shallow holes within 150 meters in depth using a push rod to push the probe.
At present, aiming at the requirements of verifying the drilling depth and the geophysical prospecting in the drilling hole on the refinement and automatic measurement of the drilling depth, the prior art has the following improvement modes: first, the position of the probe in the borehole is obtained by measuring the length of the cable carried by the rear end of the probe into the borehole. Second, the drilling depth is calculated by knocking the tail end of the drill rod in the drilling and monitoring the transmission speed of sound waves in the drill rod. Thirdly, injecting liquid into the drilling hole, and converting the drilling depth by measuring the pressure and the drilling track.
For the improvement mode and thought, the mode of measuring the cable at the tail end of the probe also needs to manually measure the number of push rods, the cable is easy to slip with the rollers, and the cable between the orifice and the cable displacement measuring device cannot be ensured to be straightened in actual construction use, so that synchronous feeding cannot be ensured between the position of the measuring probe and the measuring depth of the cable in actual use, and mismatching of measured data and depth data is often caused; the method for measuring the sound wave is convenient to realize, but is influenced by external environment in application, and the measuring effect is difficult to ensure; the mode of pressure conversion depth is limited by external factors, and extra workload is generated in the implementation process.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention aims to provide a device and a method for measuring the depth of a coal mine underground borehole, which solve the technical problem that the accuracy and precision of the depth measurement of the coal mine underground borehole in the prior art are required to be further improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
A coal mine underground drilling depth retest device comprises a shell; the shell comprises a shell body, the two longitudinal ends of the shell body are both open, a shell supporting plate is fixedly arranged on the outer side wall of the shell body, and the shell supporting plate is arranged along the longitudinal direction.
A tray is arranged in the bottom of the shell body, a plurality of jacks are arranged between the bottom surface of the tray and the inner wall of the shell body, the bottom ends of the jacks are arranged on the shell body, and the top ends of the jacks penetrate through the tray; the top surfaces of the two lateral sides of the tray are respectively provided with a side wing plate, a pair of side wing plates are transversely oppositely arranged, a slide rail seat is arranged between the transverse inner sides of the pair of side wing plates, and the slide rail seat can move up and down along the vertical direction; a plurality of springs are arranged between the bottom surface of the slide rail seat and the top surface of the tray, the bottom ends of the springs are arranged on the tray, the top ends of the springs are fixedly arranged on the slide rail seat, and the springs are positioned on the outer side of the top end of the jack.
The top of the shell body is internally provided with a roller, a space between the roller and the sliding rail seat is a push rod cavity, and the push rod cavity is used for arranging a push rod; the inner wall of slide rail seat intermediate position on be provided with a plurality of foil gage, a plurality of foil gage are evenly laid along longitudinal direction, the bottom surface of foil gage is fixed to be set up on the slide rail seat, the top surface of foil gage contacts with the push rod.
The front part and the rear part of the shell body are respectively provided with a fixed seat, the fixed seats are arranged on the outer wall of the shell, a pair of support rods are arranged in each fixed seat along the vertical direction, the tops of the pair of support rods are arranged in the fixed seats, a roller rotating shaft is arranged between the bottoms of the pair of support rods, and the rollers are fixedly arranged on the roller rotating shaft; the roller rotating shaft is arranged along the transverse direction, one transverse end of the roller rotating shaft is rotatably arranged in the supporting rod close to the transverse left side, the other transverse end of the roller rotating shaft sequentially penetrates through the supporting rod close to the transverse right side, the shell body and the fixing seat, the other transverse end of the roller rotating shaft is connected with the photoelectric encoder, and the photoelectric encoder is arranged on the shell supporting plate.
The invention also has the following technical characteristics:
And a collecting and controller mounting hole is formed in the shell supporting plate between the two photoelectric encoders, and a collecting and controller is arranged in the collecting and controller mounting hole and is connected with the photoelectric encoders, the jack and the strain gauge.
The shell body is fixed at the rear end in the longitudinal direction and is coaxially provided with a shell flange, a plurality of flange strip-shaped holes are formed in the edge of the shell flange, and the flange strip-shaped holes are uniformly distributed along the circumferential direction of the shell flange.
The tray comprises a middle tray main body and two outer arc-shaped body bosses, and the arc-shaped body bosses and the tray main body are integrally arranged; two tray steps are arranged on the lower end face of the tray main body.
The side wing plate comprises an upper limit plate, a middle support plate and a lower mounting plate, and the bottom surface of the upper limit plate can be contacted with the tray; the middle supporting plate is provided with a side wing plate strip-shaped wiring hole.
The sliding rail seat comprises a sliding rail seat main body, two sliding rail seat bosses are integrally arranged on the top surface of the sliding rail seat main body, and the top surface of the lateral outer side of the sliding rail seat main body is contacted with the top of the side wing plate; the inner wall in the middle of the slide rail seat main body and the inner wall of the slide rail seat boss are provided with a plurality of grooves, and the grooves are formed along the longitudinal direction.
The roller comprises two outer edge sections and a middle center section, wherein the outer edge sections and the center section are integrally arranged, the surface of the outer edge section is matched with the shape of the top surface of the boss of the sliding rail seat, and the surface of the center section is matched with the shape of the surface of the push rod.
The fixing seat on set up respectively a pair of bracing piece mounting hole, the bracing piece mounting hole sets up along vertical direction.
The top of the supporting rod is provided with a supporting rod external thread, and the top of the supporting rod is fixed on the upper end face of the fixing seat by a nut.
The invention also protects a coal mine underground drilling depth retest method, which adopts the coal mine underground drilling depth retest device to measure the drilling depth; the drilling depth is calculated according to the following formula i:
wherein:
D represents the drilling depth;
r represents the minimum radius of the roller;
N 1 represents the total number of pulses output by one of the opto-electronic encoders;
n 1 represents the number of pulses output by one of the photoelectric encoders when the push rod generates displacement of 2rr;
N 2 represents the total number of pulses output by another photoelectric encoder;
n 2 denotes the number of pulses output by another photoelectric encoder when the push rod is displaced by 2rr.
Compared with the prior art, the invention has the following beneficial technical effects:
The underground coal mine drilling depth re-measuring device adopts a jack, a side wing plate, a slide rail seat and a spring to jointly form a push rod lower supporting and pressing structure, adopts a fixed seat, a support rod, a roller rotating shaft and a roller to jointly form a push rod upper pressing structure, and the push rod lower supporting and pressing structure and the push rod upper pressing structure are mutually matched to be capable of pressing a push rod; in the pushing process of the push rod, the pressure born by the push rod can be monitored in real time through the strain gauge, so that the pressing state of the push rod can be conveniently judged and adjusted, the push rod can be ensured to be always kept in the pressing state in the measuring process, the push rod is prevented from slipping, and the accuracy of measured data is ensured; the push rod drives the roller to rotate during pushing, and the photoelectric encoder can convert the geometric displacement of the roller into pulses, so that the precision of measured data is ensured.
The underground coal mine drilling depth re-measuring device can automatically compress the push rod in the measuring process, can not move back and forth on the push rod under the premise of not receiving external force, is simple in implementation mode in measuring, does not need to be equipped with special personnel in the observing process, and saves construction personnel.
(III) the coal mine underground drilling depth retest method adopts two photoelectric encoders to measure simultaneously, and the measured results can be mutually verified; meanwhile, when the drilling depth is calculated, after the average value of the depth data output by the two photoelectric encoders is taken, the calculation result is more accurate, and the measurement precision is further improved in terms of numerical processing.
According to the underground coal mine drilling depth re-measuring device and method, in the pushing process of the push rod, the front-end detecting device and the push rod can be pushed simultaneously, and the measuring depth can accurately correspond to geophysical prospecting data acquired by the exploratory tube. Compared with the measurement modes of manual counting, cable displacement measurement, acoustic wave measurement and the like in the prior art when drilling depth is recovered, the device has higher measurement precision and more reliable and stable measurement result.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a device for measuring the depth of a borehole in a coal mine.
Fig. 2 is a schematic structural view of the housing.
Fig. 3 is a schematic structural view of the tray.
FIG. 4 is a schematic view of the structure of the side wing panel.
Fig. 5 is a schematic view of the structure of the slide rail seat.
Fig. 6 is a front view of the slide rail mount.
FIG. 7 is a cross-sectional view of the side of FIG. 6 A-A'.
Fig. 8 is a schematic view of the bottom structure of the slide rail seat.
Fig. 9 is a schematic structural view of the roller.
Fig. 10 is a front view of the roller.
Fig. 11 is a schematic structural view of the fixing base.
Fig. 12 is a schematic structural view of the support bar.
FIG. 13 is a schematic flow chart of a method for measuring the depth of a borehole in a coal mine.
The meaning of each reference numeral in the figures is: the device comprises a shell, a tray, a jack, a wing plate, a slide rail seat, a spring, a roller, a push rod cavity, a strain gauge, a fixed seat, a support rod, a roller rotating shaft, a photoelectric encoder and a collection controller, wherein the support rod is arranged on the shell, the support plate is arranged on the support plate, the lifting jack is arranged on the support plate, the wing plate is arranged on the support plate, the slide rail seat is arranged on the support plate, the roller is arranged on the support plate, the push rod cavity is arranged on the support plate, the strain gauge is arranged on the support plate, the support plate is arranged on the support plate, the roller rotating shaft is arranged on the support plate, the support plate is arranged on the support plate, the.
101-A shell main body, 102-a shell supporting plate, 103-a collecting and controller mounting hole, 104-a shell flange plate, 105-a flange strip hole, 106-a supporting rod through hole, 107-a shell rotating shaft through hole, 108-a jack supporting plane, 109-a tray mounting clamping groove and 110-a shell wiring hole.
201-Tray main body, 202-arc body boss, 203-tray step, 204-jack through hole, 205-lower spring hole, 206-tray wiring hole.
401-Upper limit plate, 402-middle support plate, 403-lower mounting plate, side wing plate strip wiring holes 404-, side wing plate mounting holes 405-.
The main body 501-, the boss 502-, 503-groove, 504-upper spring hole, 505-first wire hole, 506-second wire hole, 507-third wire hole, 508-plug.
701-Roller outer edge section, 702-roller center section.
1001-Supporting rod mounting holes, 1002-fixing seat rotating shaft through holes.
1101-Supporting rod external threads and 1102-supporting rod rotating shaft through holes.
The technical scheme of the invention is further described below by referring to examples.
Detailed Description
All parts and apparatuses used in the present invention are those known in the art, for example, unless otherwise specified:
the push rod is a conventional push rod (also called a push rod) known in the prior art, such as a push rod used in borehole depth retest in the prior art, or a push rod connected with a control probe.
The photoelectric encoder 13 employs a conventional photoelectric encoder known in the art.
The acquisition and controller 14 employs conventional acquisition and controllers (also known as data acquisition controllers, data acquisition controllers, etc.) as known in the art.
The following specific embodiments of the present application are given according to the above technical solutions, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present application.
Example 1:
The embodiment provides a coal mine underground drilling depth retest device, which is shown in figure 1 and comprises a shell 1; the housing 1 includes a housing main body 101, the housing main body 101 is of a hollow cylindrical structure, both longitudinal ends of the housing main body 101 are open, a housing support plate 102 is fixedly provided on an outer side wall of the housing main body 101, and the housing support plate 102 is provided along a longitudinal direction.
A tray 2 is arranged in the bottom of the shell body 101, a plurality of jacks 3 are arranged between the bottom surface of the tray 2 and the inner wall of the shell body 101, the bottom ends of the jacks 3 are arranged on the shell body 101, and the top ends of the jacks 3 penetrate through the tray 2; the top surfaces of the two lateral sides of the tray 2 are respectively provided with a side wing plate 4, the pair of side wing plates 4 are transversely opposite, a slide rail seat 5 is arranged between the transverse inner sides of the pair of side wing plates 4, and the slide rail seat 5 can move up and down along the vertical direction; a plurality of springs 6 are arranged between the bottom surface of the slide rail seat 5 and the top surface of the tray 2, the bottom ends of the springs 6 are arranged on the tray 2, the top ends of the springs 6 are fixedly arranged on the slide rail seat 5, and the springs 6 are positioned on the outer side of the top ends of the jacks 3.
The top of the shell body 101 is internally provided with a roller 7, a space between the roller 7 and the slide rail seat 5 is a push rod cavity 8, and the push rod cavity 8 is used for arranging a push rod; the inner wall of the middle position of the slide rail seat 5 is provided with a plurality of strain gauges 9, the strain gauges 9 are uniformly distributed along the longitudinal direction, the bottom surface of the strain gauge 9 is fixedly arranged on the slide rail seat 5, and the top surface of the strain gauge 9 is contacted with the push rod.
A fixed seat 10 is respectively arranged at the longitudinal front part and the longitudinal rear part of the shell body 101, the fixed seat 10 is arranged on the outer wall of the shell body 1, a pair of support rods 11 are arranged in each fixed seat 10 along the vertical direction, the tops of the pair of support rods 11 are arranged in the fixed seat 10, a roller rotating shaft 12 is arranged between the bottoms of the pair of support rods 11, and the roller 7 is fixedly arranged on the roller rotating shaft 12; the gyro wheel pivot 12 sets up along the transverse direction, and the transverse one end rotatable of gyro wheel pivot 12 is installed in being close to the bracing piece 11 of transverse left side, and the transverse other end of gyro wheel pivot 12 passes bracing piece 11, casing main part 101 and fixing base 10 that are close to transverse right side in proper order, is connected with photoelectric encoder 13 on the transverse other end of gyro wheel pivot 12, and photoelectric encoder 13 sets up on casing backup pad 102.
As a specific scheme of the embodiment, as shown in fig. 1 and 2, a housing supporting plate 102 between two photoelectric encoders 13 is provided with an acquisition and controller mounting hole 103, an acquisition and controller 14 is mounted in the acquisition and controller mounting hole 103, and the acquisition and controller 14 is connected with the photoelectric encoders 13, the jack 3 and the strain gauge 9. In this embodiment, the collection and control unit 14 is used for recording and collecting the number of turns of the roller shaft 12, the pressure applied by the strain gauge 9, and controlling the expansion and contraction of the telescopic rod of the jack 3.
As a specific scheme of the embodiment, as shown in fig. 2, a housing flange 104 is fixed at the longitudinal rear end of the housing main body 101 and coaxially provided, and a plurality of flange strip holes 105 are provided at the edge of the housing flange 104, and the plurality of flange strip holes 105 are uniformly distributed along the circumferential direction of the housing flange 104. In this embodiment, the housing flange 104 can be coupled to the hole flange of the coal mine underground various specifications through the flange strip holes 105.
As a specific scheme of the present embodiment, as shown in fig. 2, a pair of support rod through holes 106 are respectively provided on the longitudinal front portion and the longitudinal rear portion of the housing main body 101, four support rod through holes 106 are provided in a two-by-two symmetrical manner, and the support rod through holes 106 are provided in one-to-one correspondence with the support rod mounting holes 1001. In the present embodiment, the support rod through hole 106 is used for the support rod 11 to pass through the housing main body 101.
As a specific solution of this embodiment, as shown in fig. 2, two housing rotation shaft through holes 107 are formed in the housing main body 101. In this embodiment, the housing shaft through hole 107 is used for allowing the roller shaft 12 to pass through the housing body 101.
As a specific scheme of the embodiment, as shown in fig. 2, a jack support plane 108 is provided at a middle position of the bottom of the housing main body 101, and tray mounting clamping grooves 109 are provided on inner walls of the housing main body 101 at both sides of the jack support plane 108. In this embodiment, the jack support plane 108 is used for providing the jack 3, and the tray mounting slot 109 is used for mounting the tray 2.
As a specific solution of this embodiment, as shown in fig. 2, a housing wiring hole 110 is formed in the housing main body 101. In this embodiment, the housing routing hole 110 is used to provide insulated wires of the strain gauge 9 and control wires of the jack 3.
As a specific scheme of the embodiment, as shown in fig. 3, the tray 2 includes a middle tray main body 201 and two outer arc-shaped body bosses 202, and the arc-shaped body bosses 202 and the tray main body 201 are integrally arranged; two tray steps 203 are arranged on the lower end surface of the tray main body 201; the arcuate surface of the arcuate body boss 202 matches the shape of the outer surface of the tray mounting slot 109. In this embodiment, the radius of the arc surface is the same as the radius of the arc where the tray mounting slot 109 is located, and the length of the tray mounting slot 109 is identical to the length of the tray 2, so that the tray 2 can be tightly matched with the tray mounting slot 109, and further, the limit fixation of the tray 2 in the housing 1 is realized, and after the tray main body 201 is tightly mounted in the housing 1, a space with two lateral sides closed can be enclosed with the housing 1.
As a specific scheme of this embodiment, as shown in fig. 3, two jack through holes 204 are formed in the tray 2, the number of the jacks 3 is two, the two jacks 3 are respectively located in the longitudinal front portion and the longitudinal rear portion of the housing main body 101, the telescopic rods at the top ends of the two jacks 3 respectively pass through the two jack through holes 204, and the bottom surfaces of the two jacks 3 are fixedly arranged on the jack supporting plane 108.
As a specific scheme of this embodiment, as shown in fig. 3, sixteen lower spring holes 205 are formed on the top surface of the tray 2, and the sixteen lower spring holes 205 are symmetrically arranged in two rows, and eight in each row. In this embodiment, the lower spring hole 205 is used to mount the bottom of the spring 6.
As a specific solution of this embodiment, as shown in fig. 3, a tray wiring hole 206 is formed in the tray 2. In this embodiment, the tray wiring hole 206 is used to set the control line of the jack 3.
As a specific scheme of this embodiment, as shown in fig. 4, the side wing plate 4 includes an upper limiting plate 401, a middle supporting plate 402 and a lower mounting plate 403, and a structure formed by the upper limiting plate 401, the middle supporting plate 402 and the lower mounting plate 403 is a zigzag structure, and the bottom surface of the upper limiting plate 401 can contact with the tray 2. In this embodiment, after the slide rail seat 5 is limited on the upper portion of the tray 2 by the upper limiting plates 401 of the two side wing plates 4, the spring 6 is in a compressed state at this time, and the upper end surface of the slide rail seat 5 abuts against the upper limiting plates 401, when the push rod passes through the rollers 7 along the slide rail seat 5, the push rod extrudes the slide rail seat 5 to enable the slide rail seat 5 to move vertically downwards, and the stability of push rod pushing can be ensured by the slide rail seat 5 and the two rollers 7.
As a specific scheme of this embodiment, as shown in fig. 4, a side wing plate strip-shaped wiring hole 404 is formed on the middle support plate 402. In this embodiment, the side wing plate bar-shaped wiring hole 404 is used for setting the insulated wire of the strain gauge 9 and the control wire of the jack 3, and the side wing plate bar-shaped wiring hole 404 is set to be in a bar shape, so that enough space can be ensured for the wire and the control wire to pass through, and the control wire can be ensured not to be damaged due to the up-and-down movement of the slide rail seat 5.
As a specific embodiment of the present embodiment, as shown in fig. 4, a plurality of side wing plate mounting holes 405 are formed in the lower mounting plate 403. In this embodiment, bolts are installed in the side wing plate installation holes 405, and the side wing plates 4 are fixedly connected with the tray 2 through the bolts and the side wing plate installation holes 405.
As a specific scheme of the present embodiment, as shown in fig. 5 and 6, the slide rail seat 5 includes a slide rail seat main body 501, and two slide rail seat bosses 502 are integrally provided on the top surface of the slide rail seat main body 501; the top surface of the lateral outside of the slide rail seat main body 501 is in contact with the top of the side wing plate 4; a plurality of grooves 503 are formed in the inner wall of the middle of the slide rail seat main body 501 and the inner wall of the slide rail seat boss 502, and the grooves 503 are formed in the longitudinal direction. In this embodiment, the space between the inner walls of the two sliding rail seat bosses 502, the roller 7 and the sliding rail seat main body 501 is the push rod cavity 8, the groove 503 makes the bottom of the push rod cavity 8 have a concave-convex structure, and this structure can effectively increase the friction force with the push rod, thereby preventing the sliding rod.
As a specific scheme of the embodiment, as shown in fig. 8, sixteen upper spring holes 504 are formed on the bottom surface of the slide rail seat 5, the sixteen upper spring holes 504 are symmetrically arranged in two rows, and each row is eight, and the lower spring holes 205 are arranged in one-to-one correspondence with the upper spring holes 504. In this embodiment, the upper spring hole 504 is used for installing the top of the spring 6, and after the spring 6 is installed through the upper spring hole 504 and the lower spring hole 205, the even stress of the slide rail seat 5 can be ensured.
As a specific scheme of the embodiment, as shown in fig. 7 and 8, a plurality of first track holes 505 of the track seat are formed in the track seat 5, the first track holes 505 of the track seat are formed along the vertical direction, the number of the first track holes 505 of the track seat and the number of the strain gauges 9 are two, the two strain gauges 9 are respectively located under the two rollers 7, and the first track holes 505 of the track seat are respectively located under the two strain gauges 9; the second track hole 506 of the slide rail seat is arranged in the slide rail seat 5, and the second track hole 506 of the slide rail seat is arranged along the longitudinal direction; a third track hole 507 of the slide rail seat is arranged at the middle position of the slide rail seat 5, and the third track hole 507 of the slide rail seat is arranged along the transverse direction; the first track seat wire hole 505 and the third track seat wire hole 507 are communicated with the second track seat wire hole 506. In this embodiment, the insulated wires of the strain gauge 9 are connected with the terminals of the acquisition and controller 14 through the first track hole 505, the second track hole 506, the third track hole 507, the side wing plate bar-shaped track hole 404 and the housing track hole 110. The control line of the jack 3 is connected with the wiring terminal of the collection controller 14 through the tray wiring hole 206, the side wing plate strip wiring hole 404 and the shell wiring hole 110 in sequence.
As a specific solution of this embodiment, as shown in fig. 5, a wire hole plug 508 is inserted and fitted into the front end of the second wire hole 506 of the slide rail seat. In this embodiment, the wire hole plugging head 508 plays a role in sealing and dust prevention for insulation guiding.
As a specific scheme of this embodiment, as shown in fig. 9 and 10, the roller 7 includes two outer edge sections 701 and a central center section 702, the outer edge sections 701 and the center section 702 are integrally arranged, the surface of the outer edge section 701 is matched with the shape of the top surface of the boss 502 of the slide rail seat, the surface of the center section 702 is matched with the shape of the surface of the push rod, the surface of the center section 702 is arc-shaped, and can be matched with the outline of the push rod with the same specification, so that the push rod with different specifications can be conveniently adapted by replacing the roller 7.
As a specific scheme of the embodiment, a threaded mounting hole is formed in the center of the inside of the roller 7 along the transverse direction. In this embodiment, the roller 7 is fixedly connected to the roller shaft 12 through the threaded mounting hole.
As a specific scheme of the embodiment, as shown in fig. 11, the whole of the fixing base 10 is in an arch structure, and the lower end surface of the fixing base 10 is matched with the shape of the outer surface of the housing main body 101; a pair of support bar mounting holes 1001 are respectively formed in each fixing base 10, and the support bar mounting holes 1001 are arranged along the vertical direction. In this embodiment, the support rod mounting hole 1001 is used for mounting the support rod 11, and the bottom of the support rod 11 sequentially passes through the support rod mounting hole 1001 and the support rod through hole 106 and then extends into the housing main body 101.
As a specific scheme of this embodiment, as shown in fig. 11, each fixing seat 10 is provided with a fixing seat rotating shaft through hole 1002, and the sizes of the fixing seat rotating shaft through holes 1002 and the housing rotating shaft through holes 107 are the same. In this embodiment, the fixing base shaft through hole 1002 is used for allowing the roller shaft 12 to pass through the fixing base 10.
As a specific scheme of the present embodiment, as shown in fig. 12, a supporting rod external thread 1101 is provided at the top end of the supporting rod 11, and the top end of the supporting rod 11 is fixed to the upper end surface of the fixing base 10 with a nut. In this embodiment, the length of the supporting rod 11 extending into the casing 1 is adjusted by adjusting the length of the nut screwed into the external thread 1101 of the supporting rod, so as to adjust the distance between the roller 7 and the sliding rail seat 5.
As a specific scheme of this embodiment, as shown in fig. 12, a supporting rod rotating shaft through hole 1102 is formed at the bottom of each supporting rod 11, and a roller rotating shaft 12 is rotatably installed in the supporting rod rotating shaft through hole 1102 of the supporting rod 11 near the lateral left side. In this embodiment, the other end of the roller shaft 12 in the lateral direction passes through the housing shaft through hole 107, and the holder shaft through hole 1002 of the support rod 11 near the lateral right side at a time and then passes out.
Example 2:
The embodiment provides a coal mine underground drilling depth retest method, as shown in fig. 13, which is implemented by adopting the coal mine underground drilling depth retest device of the embodiment 1; the method specifically comprises the following steps:
step one, fixing the coal mine underground drilling depth retest device at an orifice flange of a measured drilling hole.
Step two, inserting a push rod into the push rod cavity 8 to fix the push rod between the roller 7 and the slide rail seat 5; the strain gauge 9 can sense the downward pressure given by the push rod, and can judge whether the push rod compresses the roller 7 and the slide rail seat 5 or not through the pressure, if the push rod is not compressed, the telescopic rod of the jack 3 is controlled to extend upwards through the acquisition and controller 14, and the slide rail seat 5 is pushed to move upwards until the push rod is in a compressed state.
And thirdly, when depth retest or instrument observation is carried out, force towards the drilling direction is applied to the push rod, and as the roller 7 and the slide rail seat 5 compress the push rod, when the push rod is displaced on the slide rail seat 5 under the action of external force, the roller 7 rotates, the roller rotating shaft 12 rotates with the step, and the photoelectric encoder 13 is driven to rotate.
And step four, the upper limit and the lower limit of the pressure threshold are preset in the acquisition and controller 14, and in the pushing process, if the pressure value of the strain gauge 9 exceeds the set threshold range, the acquisition and controller 14 controls the jack 3 to generate up-down displacement to adjust the compression state of the push rod.
And fifthly, after pushing one push rod is completed, connecting the other push rod to the tail part of the previous push rod through threads, and then continuing pushing.
Step six, a plurality of pulses are output in the rotation of the photoelectric encoder 13 for measuring the rotated angle, n pulses are output every circle of rotation of the photoelectric encoder 13, the radius of the roller 7 is r, and when the push rod generates displacement of 2 pi r, the photoelectric encoder 13 outputs n pulses, namely the measurement precision of the photoelectric encoder 13 is 2 pi r/n.
And step seven, the acquisition and controller 14 can respectively calculate the pulse quantity output by the photoelectric encoders 13 connected with the two rollers 7, obtain an actual depth value measured value after conversion, and average the depth values output by the two photoelectric encoders 13 measured simultaneously, wherein the obtained value is the drilling depth. The above procedure may be carried out as shown in the following formula I:
wherein:
D represents the drilling depth;
r represents the radius of the roller;
N 1 represents the total number of pulses output by one of the opto-electronic encoders;
n 1 represents the number of pulses output by one of the photoelectric encoders when the push rod generates displacement of 2rr;
N 2 represents the total number of pulses output by another photoelectric encoder;
n 2 denotes the number of pulses output by another photoelectric encoder when the push rod is displaced by 2rr.
As can be seen from the above embodiments 1 and 2, the present invention proposes to obtain depth position data of a probe entering a borehole in real time in an observation process by measuring displacement of a push rod connected to the tail end of the probe into the borehole, aiming at depth information measurement of a hand-held borehole observation instrument in a coal mine. The method is simple in implementation mode during measurement, special personnel operation is not needed, acquired data is high in precision and resolution, the push rod can be effectively prevented from slipping in use by the device structure and the method, and meanwhile, the measurement accuracy is improved by carrying out average after two groups of measurement data are processed.
Claims (10)
1. The coal mine underground drilling depth retest device is characterized by comprising a shell (1); the shell (1) comprises a shell main body (101), both longitudinal ends of the shell main body (101) are open, a shell supporting plate (102) is fixedly arranged on the outer side wall of the shell main body (101), and the shell supporting plate (102) is arranged along the longitudinal direction;
A tray (2) is arranged in the bottom of the shell body (101), a plurality of jacks (3) are arranged between the bottom surface of the tray (2) and the inner wall of the shell body (101), the bottom ends of the jacks (3) are arranged on the shell body (101), and the top ends of the jacks (3) penetrate through the tray (2); the top surfaces of the two lateral sides of the tray (2) are respectively provided with a side wing plate (4), the pair of side wing plates (4) are transversely oppositely arranged, a slide rail seat (5) is arranged between the inner lateral sides of the pair of side wing plates (4), and the slide rail seat (5) can move up and down along the vertical direction; a plurality of springs (6) are arranged between the bottom surface of the slide rail seat (5) and the top surface of the tray (2), the bottom ends of the springs (6) are arranged on the tray (2), the top ends of the springs (6) are fixedly arranged on the slide rail seat (5), and the springs (6) are positioned on the outer side of the top ends of the jacks (3);
the top of the shell body (101) is internally provided with a roller (7), a space between the roller (7) and the sliding rail seat (5) is a push rod cavity (8), and the push rod cavity (8) is used for arranging a push rod; the inner wall of the middle position of the sliding rail seat (5) is provided with a plurality of strain gauges (9), the strain gauges (9) are uniformly distributed along the longitudinal direction, the bottom surface of the strain gauge (9) is fixedly arranged on the sliding rail seat (5), and the top surface of the strain gauge (9) is contacted with the push rod;
The shell comprises a shell body (101), wherein a fixed seat (10) is respectively arranged at the longitudinal front part and the longitudinal rear part of the shell body (101), the fixed seat (10) is arranged on the outer wall of the shell body (1), a pair of support rods (11) are arranged in each fixed seat (10) along the vertical direction, the tops of the pair of support rods (11) are arranged in the fixed seat (10), a roller rotating shaft (12) is arranged between the bottoms of the pair of support rods (11), and a roller (7) is fixedly arranged on the roller rotating shaft (12); the roller rotating shaft (12) is arranged along the transverse direction, one transverse end of the roller rotating shaft (12) is rotatably arranged in a supporting rod (11) close to the transverse left side, the other transverse end of the roller rotating shaft (12) sequentially penetrates through the supporting rod (11) close to the transverse right side, the shell body (101) and the fixing seat (10), the photoelectric encoder (13) is connected to the other transverse end of the roller rotating shaft (12), and the photoelectric encoder (13) is arranged on the shell supporting plate (102).
2. The underground coal mine drilling depth retest device according to claim 1, wherein a collecting and controller mounting hole (103) is formed in a shell supporting plate (102) between two photoelectric encoders (13), a collecting and controller (14) is mounted in the collecting and controller mounting hole (103), and the collecting and controller (14) is connected with the photoelectric encoders (13), the jack (3) and the strain gauge (9).
3. The underground coal mine drilling depth retest device according to claim 1, wherein a shell flange (104) is fixedly and coaxially arranged at the longitudinal rear end of the shell main body (101), a plurality of flange strip-shaped holes (105) are formed in the edge of the shell flange (104), and the flange strip-shaped holes (105) are uniformly distributed along the circumferential direction of the shell flange (104).
4. The underground coal mine drilling depth retest device according to claim 1, wherein the tray (2) comprises a middle tray main body (201) and two outer arc-shaped body bosses (202), and the arc-shaped body bosses (202) and the tray main body (201) are integrally arranged; two tray steps (203) are arranged on the lower end face of the tray main body (201).
5. The underground coal mine drilling depth retest device according to claim 1, wherein the side wing plate (4) comprises an upper limit plate (401), a middle support plate (402) and a lower mounting plate (403), and the bottom surface of the upper limit plate (401) can be contacted with the tray (2); the middle supporting plate (402) is provided with a side wing plate strip-shaped wiring hole (404).
6. The underground coal mine drilling depth retest device according to claim 1, wherein the sliding rail seat (5) comprises a sliding rail seat main body (501), two sliding rail seat bosses (502) are integrally arranged on the top surface of the sliding rail seat main body (501), and the top surface of the lateral outer side of the sliding rail seat main body (501) is contacted with the top of the side wing plate (4); the inner wall in the middle of the sliding rail seat main body (501) and the inner wall of the sliding rail seat boss (502) are provided with a plurality of grooves (503), and the grooves (503) are formed along the longitudinal direction.
7. The underground coal mine drilling depth retest device according to claim 1, wherein the roller (7) comprises two outer roller edge sections (701) and a middle roller center section (702), the outer roller edge sections (701) and the roller center section (702) are integrally arranged, the surface of the outer roller edge sections (701) is matched with the shape of the top surface of the boss (502) of the sliding rail seat, and the surface of the roller center section (702) is matched with the shape of the surface of the push rod.
8. The underground coal mine drilling depth retest device according to claim 1, wherein a pair of support rod mounting holes (1001) are respectively formed in each fixing seat (10), and the support rod mounting holes (1001) are arranged along the vertical direction.
9. The underground coal mine drilling depth retest device according to claim 1, wherein the top end of the supporting rod (11) is provided with a supporting rod external thread (1101), and the top end of the supporting rod (11) is fixed on the upper end face of the fixing seat (10) by a nut.
10. A method for retesting the depth of a coal mine underground borehole, which is characterized in that the method adopts the coal mine underground borehole depth retesting device as claimed in any one of claims 1 to 9 to measure the depth of the borehole; the drilling depth is calculated according to the following formula I:
wherein:
D represents the drilling depth;
r represents the minimum radius of the roller;
N 1 represents the total number of pulses output by one of the opto-electronic encoders;
n 1 represents the number of pulses output by one of the photoelectric encoders when the push rod generates displacement of 2rr; n 2 represents the total number of pulses output by another photoelectric encoder;
n 2 denotes the number of pulses output by another photoelectric encoder when the push rod is displaced by 2rr.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118242065A (en) * | 2024-05-29 | 2024-06-25 | 莱州亚通重型装备有限公司 | Drill rod depth measuring device of coal mine drilling machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118242065A (en) * | 2024-05-29 | 2024-06-25 | 莱州亚通重型装备有限公司 | Drill rod depth measuring device of coal mine drilling machine |
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