CN113739756A - Coal mining subsidence ground crack height difference measuring device and method - Google Patents
Coal mining subsidence ground crack height difference measuring device and method Download PDFInfo
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- CN113739756A CN113739756A CN202110949217.7A CN202110949217A CN113739756A CN 113739756 A CN113739756 A CN 113739756A CN 202110949217 A CN202110949217 A CN 202110949217A CN 113739756 A CN113739756 A CN 113739756A
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- G—PHYSICS
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention discloses a coal mining subsidence ground crack height difference measuring device and a method, which belong to the technical field of surface micro-landform measurement. The invention utilizes the light source emitter on the base with the higher side of the crack to emit light beams, adjusts the height of the light source receiver on the base with the lower side of the crack through the telescopic rod to receive the light beams, reads the reading of the vertical ruler on the telescopic rod, obtains the average value of the height difference of the crack through multiple measurements, can accurately and rapidly measure the height difference of the crack, and has high measurement precision, simple operation and convenient carrying.
Description
Technical Field
The invention relates to the technical field of surface micro-landform measurement, in particular to a coal mining subsidence ground crack height difference measuring device and method.
Background
The mine geology disaster in China is very serious. The ground collapse caused by underground mining is one of the most serious mine geological disasters in a mining area, in a plain area, the most common damage form of the ground surface of the mining area is mining subsidence, and data shows that the area of the subsided land caused by coal mining is about 2hm every year2On the left and right sides, in some areas with high underground diving positions, when the ground surface is sunk, the elevation of the ground surface reaches below the diving position, a water pit and a marshland are possibly formed, so that the cultivated land loses the use value. Even if the underground water level is relatively low, the surface of the mined ore bed has no accumulated water, but the water and soil loss is aggravated along with a large amount of ground cracks, so that the soil quality is reduced, the ecological environment is damaged, and mine geological disasters such as mine water permeation are even caused.
Underground coal mining causes surface subsidence, ground cracks are the most typical type of micro-landform, cause the quality of cultivated land to be reduced, forest land is reduced in production, and surface structures are damaged, the slope of the ground cracks ranges from 1 to 5 degrees, and the slope changes along the extending direction of the cracks. Quantitative expression of the height difference of the ground surface fractures (as shown in fig. 1) is an important guarantee for controlling the fractures and water and soil loss, but for measuring the ground surface fractures caused by coal mining subsidence, attention needs to be paid to: (1) the width change of the crack and the change of the upper and lower height difference are from several millimeters to dozens of centimeters, so that the measurement accuracy is ensured; (2) on non-hardened underlying surfaces (cultivated land, forest land and the like), the soil texture at the crack is loose and easy to deform, so that the crack is not disturbed as much as possible, and the stability of measurement is ensured.
At present, no measuring device specially aiming at the gradient of the ground fissure exists, and the existing height difference measuring method mainly comprises the following steps: direct tape measure measures, surveying instrument measures (surveyor's level, RTK etc.), unmanned aerial vehicle etc. and technique, has following several not enough: the lower cushion surface is uneven, and the direct measurement error of the tape measure is too large; the professional measuring tool is complex to operate and is not suitable for non-professional personnel to use; drones are accurate to the millimeter level, but are expensive and require specialized technicians and post-processing.
Therefore, the accurate, simple and convenient to operate and portable device for measuring the ground cracks of the ground surface of the coal mining subsidence area is the key for quantitatively evaluating the ground cracks of the ground surface of the coal mining subsidence area. Therefore, a coal mining subsidence ground crack height difference measuring device and method are provided.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to solve the problem that prior art exists that measuring error is big, unsuitable non-professional use, provide a coal mining subsidence ground crack discrepancy in elevation measuring device, possess advantages such as simple structure, technology maturity, sexual valence relative altitude, convenient easy-to-use.
The invention solves the technical problems through the following technical scheme, and the light source emitting assembly and the light source receiving assembly are arranged on two sides of a crack, the light source emitting assembly comprises a first base, a first fixed rod piece and a light source emitter, one end of the first fixed rod piece is connected with the first base, the other end of the first fixed rod piece is connected with the light source emitter, the light source receiving assembly comprises a second base, a second fixed rod piece, a telescopic connecting piece and a light source receiver, the second base is connected with one end of the second fixed rod piece, one end of the telescopic connecting piece is movably connected with the other end of the second fixed rod piece, and the other end of the telescopic connecting piece is connected with the light source receiver.
Furthermore, the first base with the inside of second base all is provided with power, inclination sensor, the inside of second base still is provided with light source sensor, power in the first base with the light source transmitter electricity is connected, power in the second base with the light source receiver electricity is connected, the light source receiver with light source sensor communication connection, through inclination sensor real-time measurement first base with the inclination of second base mesa.
Furthermore, the outer surfaces of the first base and the second base are respectively provided with a display screen for displaying a real-time inclination angle of the table top of the base, and the display screens are in communication connection with the inclination angle sensor and are electrically connected with the power supply.
Further, telescopic connection spare is including having flexible perpendicular chi of scale, perpendicular chi set screw, perpendicular chi fixed screw, the one end setting of flexible perpendicular chi is in inside the fixed member of second, perpendicular chi set screw, perpendicular chi fixed screw all set up on the fixed member of second and rather than threaded connection, through perpendicular chi set screw adjusts the height of flexible perpendicular chi, through it is fixed to erect chi fixed screw the position of flexible perpendicular chi.
Still further, the light source emitting assembly further comprises a light source switch for controlling the light source emitter, the light source switch being disposed on the first fixing rod.
Furthermore, the light source receiving assembly further comprises a knob and a light source receiving plate, the knob is arranged at the end part of the telescopic vertical ruler and is in threaded connection with the telescopic vertical ruler, the light source receiving plate is arranged on the knob and is detachably connected with the knob through a buckle, and the light source receiver is arranged on the light source receiving plate.
Furthermore, the first base and the second base are both provided with inclination angle adjusting screws for adjusting the inclination angle of the table top of the base.
The invention also provides a coal mining subsidence ground crack height difference measuring method, which adopts the measuring device to measure the height difference of the ground crack and comprises the following steps:
s1: measuring the average slope theta of the earth surface on two sides of the crack at multiple points on two sides of the crack by using a first base and a second base which are respectively arranged on two sides of the crack;
s2: a first base is arranged on the higher side of the crack, a second base is arranged on the lower side of the crack, the inclination angles of the first base and the second base are adjusted by adjusting the inclination angle adjusting screws on the first base and the second base, so that the table tops of the bases on the high side and the low side are kept parallel to the whole earth surface, and the connecting line of the two bases is perpendicular to the extension direction of the crack;
s3: emitting a light beam by using a light source emitter arranged at the top of a first fixed rod piece on the upper part of a first base at a selected point A at the higher side of the crack, receiving the light beam by using a light source receiver arranged on a light source receiving plate at the top of a second fixed rod piece on the upper part of a second base at a selected point B at the lower side of the crack, and reading the reading of the telescopic vertical ruler, namely the current measured value of the height difference of the crack;
s4: and repeating the steps S2 and S3 to obtain average crack height difference data according to multiple point selection measurements on two sides of the crack.
Furthermore, the average slope theta of the ground surface on two sides is measured at multiple selected points on two sides of the crack, wherein theta is the slope of the ground surface near the crack in the direction perpendicular to the crack extension direction.
Furthermore, the inclination angles of the first base and the second base are adjusted through the inclination angle adjusting screws, so that the table tops of the bases on the high side and the low side are kept parallel to the whole ground surface, that is, the inclination angles of the first base and the second base are all adjusted to be theta.
Compared with the prior art, the invention has the following advantages: the coal mining subsidence ground crack height difference measuring device and the method utilize the light source emitter on the base with the higher side of the crack to emit the light beam, adjust the height of the light source receiver on the base with the lower side of the crack through the telescopic rod piece so as to receive the light beam, read the reading of the vertical ruler on the telescopic rod piece, measure for many times to obtain the average value of the crack height difference, can accurately and quickly measure the crack height difference, have high measurement precision, are simple to operate, are convenient to carry, and are worth being popularized and used.
Drawings
FIG. 1 is a schematic cross-sectional view of a subterranean fracture;
FIG. 2 is a schematic structural diagram of a light source emitting assembly according to a first embodiment and a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a light source receiving module according to a first embodiment of the present invention;
FIG. 4 is a schematic top view of a second preferred embodiment of the present invention;
FIG. 5 is a schematic front view of a second mounting position of the apparatus according to the embodiment of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
As shown in fig. 2 and 3, the present embodiment provides a technical solution: the coal mining subsidence ground crack height difference measuring device comprises a light source transmitting assembly and a light source receiving assembly which are arranged on two sides of a crack respectively, wherein the light source transmitting assembly comprises a first fixing rod piece 6, a light source transmitter 8 and a first base 1, the light source transmitter 8 is arranged on one side of the top of the first fixing rod piece 6, the bottom of the first fixing rod piece 6 is connected with the center of the first base 1, the light source receiving assembly comprises a light source receiver 20, a second fixing rod piece 14, a light source receiving plate 19 and a second base 9, the light source receiver 20 is detachably connected with the light source receiving plate 19, the distance between the light source receiving plate 19 and the top of the second fixing rod piece 14 is adjustable, and the bottom of the second fixing rod piece 14 is connected with the center of the second base 9.
In this embodiment, a first power interface 2 and a first data interface 3 are disposed on one side of a first base 1, first tilt angle adjusting screws 4 are disposed at four vertex angles on the first base 1, a first screen 5 is disposed on an upper surface of an edge of one side of the first base 1, an upper portion of the first base 1 is fixedly connected with a first fixing rod 6, and a light source switch 7 is disposed at a middle position of a top of the first fixing rod 6 and used for controlling a switch of a light source emitter 8;
in this embodiment, one side of the second base 9 has a second power interface 10 and a second data interface 11, four top corners of the second base 9 are provided with second tilt angle adjusting screws 12, an upper surface of one side edge of the second base 9 is provided with a second screen 13, and an upper portion of the second base 9 is fixedly connected to a second fixing rod 14.
In this embodiment, the outer wall of the second fixing rod 14 is provided with a vertical ruler brake screw 15, the outer wall of the second fixing rod 14 is provided with a vertical ruler fixing screw 16, the second fixing rod 14 is provided with a telescopic vertical ruler 17 by top embedding, the upper end of the telescopic vertical ruler 17 is provided with a knob 18, a light source receiving plate 19 is arranged on the upper portion of the knob 18, and a light source receiver 20 is arranged at the central position of the light source receiving plate 19.
In this embodiment, the telescopic vertical scale 17 is a damping snap-in telescopic scale.
In this embodiment, the height of the first fixing rod 6 is 1m, the height of the second fixing rod 14 is 0.95m, and the vertical ruler brake screw 15 and the vertical ruler fixing screw 16 are symmetrically arranged on the outer walls of the two sides of the second fixing rod 14. When the light source emitter 8 on the first fixed rod 6 emits a light beam, the vertical scale brake screw 15 on the second fixed rod is rotated, so that the telescopic graduated scale is lifted. When the light source receiver 20 receives the light source signal, the vertical ruler set screw 16 is tightened and the reading is recorded.
The vertical ruler brake screw 15 drives the hinge inside the second fixed rod member 14, and the ascending or descending of the telescopic vertical ruler 17 is controlled by rotating the direction of the vertical ruler brake screw 15.
It should be noted that, at the same level, when the telescopic vertical ruler 17 inside the second fixing rod 14 is not extended, the light beam emitted by the light source emitter 8 can be received by the light source receiver 20.
In the present embodiment, the light source receiving plate 19 is a square plate having a side of 10 cm.
In this embodiment, a power supply and an inclination sensor are installed inside the first base 1 and the second base 9, and a light source sensor is also installed inside the second base 9 (when the light source of the first base 1 reaches the center of the light source receiving plate 19 on the second base 9, the light source sensor receives a light source signal and displays the light source signal on the screen of the second base 9 in time, prompts a measurer to screw the vertical ruler fixing screw 16, and records the reading of the telescopic vertical ruler 17), wherein the inclination sensor and the light source sensor are both high-sensitivity type.
In this embodiment, the first base 1, the second base 9, the telescopic vertical ruler 17, the first fixing rod 6 and the second fixing rod 14 are all made of a novel aluminum alloy material;
in this embodiment, the first tilt angle adjusting screw 4, the second tilt angle adjusting screw 12, the vertical ruler brake screw 14 and the vertical ruler fixing screw 15 are all made of light steel;
in this embodiment, the outer package or the outer shell of the knob 18, the light source switch 7, the light source emitter 8, the light source receiving board 19, the first power interface 2, the second power interface 10, the first data interface 3 and the second data interface 11 is made of a plastic material;
in this embodiment, the first screen 5 and the second screen 13 are made of reflective liquid crystal material, and the light source receiver 22 is made of photosensitive metal material.
The embodiment also provides a method for measuring the height difference of the ground fracture, which adopts the measuring device to measure the height difference of the ground fracture, and comprises the following steps:
the method comprises the following steps: measuring the average slope theta of the earth surface on two sides of the crack at multiple points on two sides of the crack by using a first base and a second base which are respectively arranged on two sides of the crack;
in the first step, the average slope theta of the ground surface on the ground on the two sides of the crack is measured at a plurality of selected points on the two sides of the crack, wherein theta is the slope of the ground surface near the crack in the direction perpendicular to the extension direction of the crack.
Step two: the mounting equipment is used for mounting a first base on the higher side of the crack, mounting a second base on the lower side of the crack, and adjusting the inclination angles of the first base and the second base by adjusting the inclination angle adjusting screws on the first base and the second base so that the table tops of the bases on the high side and the low side are kept parallel to the ground surface, and the connecting line of the two bases is perpendicular to the extension direction of the crack;
in the second step, the inclination angles of the first base and the second base are adjusted through the inclination angle adjusting screws, so that the table surfaces of the bases on the high side and the low side are kept parallel to the ground surface, that is, the inclination angles of the first base and the second base are all adjusted to be theta.
In the second step, considering that the ground surface is not absolutely smooth and flat and the base is inclined due to the existence of broken stones, the inclination angle adjusting screws on the base are used to enable the table tops of the two bases to be parallel to the whole ground surface.
Step three: emitting a light beam by using a light source emitter arranged at the top of a first fixed rod piece on the upper part of a first base at a selected point A on the higher side of the crack, receiving the light beam by using a light source receiving plate arranged at the top of a second fixed rod piece on the upper part of a second base at a selected point B on the lower side of the crack, and reading the reading of the telescopic vertical ruler, namely the current measured value of the height difference of the crack;
and step four, repeating the step two and the step three to obtain average data of the height difference of the crack according to multiple point selection measurements on two sides of the crack.
In the fourth step, the measured data of different selected points are obtained, and the average value of the measured data is obtained.
Example two
As shown in fig. 2 to 5, the present embodiment provides a coal mining subsidence ground crack height difference measuring device, which includes a first base 1 and a second base 9, a first power interface 2, a second power interface 10 and a first data interface 3 are respectively disposed on the side surfaces of the first base 1 and the second base 9, a second data interface 11, wherein four top angles at the upper sides of a first base 1 and a second base 9 are respectively provided with a first inclination angle adjusting screw 4 and a second inclination angle adjusting screw 12, the outer surface of the upper end of the first base 1 is detachably connected with a first fixed rod piece 6, the top of the first fixed rod piece 6 is provided with a light source switch 7 and a light source emitter 8, the outer surface of the upper end of the second base 9 is detachably connected with a second fixed rod piece 14, a high-precision telescopic vertical ruler 17 is sleeved in the second fixed rod piece 14, the telescopic vertical ruler 17 can move up and down along the inner part of the second fixed rod piece 14, and the top of the telescopic vertical ruler 17 is provided with a knob 18; the knob 18 is screwed with the high-precision telescopic vertical ruler 17, and the surface of the knob 18 is connected with the light source receiving plate 19 through a buckle.
In the present embodiment, the first fixing rod 6 and the first base 1, and the second fixing rod 14 and the second base 9 are detachably mounted by screws and screw plates.
In this embodiment, the telescopic vertical ruler 17 is a damping buckle type telescopic scale, the sections are connected with each other by damping buckles, and can be pulled out by external force when in use, so as to enlarge the measurement range, and can be stored in the second fixing rod member 14 by pressing and contracting when not in use; the occupied space is reduced.
In this embodiment, the outer surfaces of the two sides of the second fixing rod 14 are respectively provided with a vertical ruler brake screw 15 and a vertical ruler fixing screw 16, the top of the second fixing rod 14 is provided with a knob 18, the surface of the knob 18 is connected with a light source receiving plate 19 through a buckle, the center of the light source receiving plate 19 is provided with a high-sensitivity light source receiver 20, the light source receiving plate 19 can be pulled out from the knob when not in use, the knob 18 can also be used as a cover of the second fixing rod 14, and the high-precision telescopic vertical ruler 17 in the second fixing rod is prevented from sliding out to damage the device.
In this embodiment, the first base 1, the second base 9, the telescopic vertical ruler 17, the first fixing rod 6, and the second fixing rod 14 are made of a novel aluminum alloy material.
In this embodiment, the first tilt angle adjusting screw 4, the second tilt angle adjusting screw 12, the vertical rod braking screw 15, and the vertical rod fixing screw 16 are all made of light steel.
In this embodiment, the outer package or the outer shell of the knob 18, the light source switch 7, the light source emitter 8, the light source receiving board 19, the first power interface 2, the second power interface 10, the first data interface 3, and the second data interface 11 is made of a high-strength plastic material.
In this embodiment, the first screen 5 and the second screen 13 are made of reflective liquid crystal material, and the light source receiver 20 is made of photosensitive special metal material;
in this embodiment, the volume of the whole device is not more than 0.2m after shrinkage2The portable field measurement instrument is convenient to carry and operate and is suitable for field measurement.
It should be noted that, in the coal mining subsidence ground crack height difference measuring device, before formal measurement, a light source receiving plate 19 is installed on a knob 18 which is used for installing equipment and adjusting a light source on the second fixed rod member 14 (a telescopic vertical ruler 17 does not extend out, and scales are on the scale 0), at this time, a light source switch 7 on the first fixed rod member 6 is turned on, when a light beam is just arranged on a light source receiver 20 at the middle position on the light source receiving plate 19, at this time, a light source signal appears on a screen on the second base 9, at this time, the adjustment of the light source transmitter 8 and the light source receiver 20 is finished. When the step crack height difference on the working surface of the coal mining subsidence area is measured according to the requirement, two points needing to measure the height difference are selected, the point is prevented from being selected in the ground crack transition zone, the gradient is measured at a plurality of selected points around the selected point, and the average gradient of a plane where the point is located is obtained (the plane selection area is recommended to be 1 m)2To 4m2) The trend of the ground fissure is observed, points are selected at the upper disc and the lower disc of the ground fissure at stable points, and the connecting line of the two points is perpendicular to the extension direction of the fissure. Placing the first base 1 onPlacing a second base 9 at the higher side (point A) of the crack and the lower side (point B) of the crack, recording inclination angle readings theta of an upper disc and a lower disc (namely the average gradient of the plane where the bases are located) on a screen above the two bases through inclination angle sensors in the two bases, adjusting the inclination angles of the bases through inclination angle adjusting screws on the two bases to enable table tops where the first base 1 and the second base 9 are located to be integrally parallel to the earth surface of a selected point (namely adjusting the inclination angles of the first base 1 and the second base 9 through the inclination angle adjusting screws to enable the table tops of the bases at the high side and the low side to be parallel to the earth surface to enable the inclination angles of the first base 1 and the second base 9 to be adjusted to be theta), enabling a connecting line of the two bases to be perpendicular to the extension direction of the crack, opening a light source switch 7 on the first base 1, then opening a telescopic vertical ruler 17 on the second base 9, adjusting the height of the vertical ruler through a vertical ruler braking screw 15 on a second fixing rod piece 14, and when the light source receiving plate 19 on the second base 9 receives the light source information, screwing the vertical ruler fixing screw 16, recording the reading H of the telescopic vertical ruler 17, namely the height difference of the relief ground cracks is equal to H, and after the data recording is finished, withdrawing the dismounting device.
In summary, the coal mining subsidence ground crack height difference measuring device and method of the above embodiment utilize the light source emitter on the base with the higher side of the crack to emit the light beam, adjust the height of the light source receiver on the base with the lower side of the crack through the telescopic rod to receive the light beam, read the reading of the vertical ruler on the telescopic rod, measure many times to obtain the average value of the crack height difference, can accurately and quickly measure the crack height difference, have high measurement accuracy, are simple to operate, are convenient to carry, and are worth being popularized and used.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a coal mining subsidence ground crack discrepancy in elevation measuring device which characterized in that: including setting up in the light source transmission subassembly and the light source receiving assembly of crack both sides, the light source transmission subassembly includes first base, first fixed member, light source transmitter, the one end of first fixed member with first pedestal connection, the other end with light source transmitter connects, the light source receiving assembly includes second base, the fixed member of second, telescopic connection spare, light source receiver, the second base with the one end of the fixed member of second is connected, telescopic connection spare one end with the other end swing joint of the fixed member of second, telescopic connection spare the other end with light source receiver connects.
2. The coal mining subsidence ground crack height difference measuring device of claim 1, characterized in that: the first base with the inside of second base all is provided with power, inclination sensor, the inside of second base still is provided with light source sensor, power in the first base with the light source transmitter electricity is connected, power in the second base with the light source receiver electricity is connected, light source receiver with light source sensor communication connection, through inclination sensor measures in real time first base with the inclination of second base mesa.
3. The coal mining subsidence ground crack height difference measuring device of claim 2, characterized in that: the outer surfaces of the first base and the second base are provided with display screens used for displaying real-time inclination angles of the base table board, and the display screens are in communication connection with the inclination angle sensors and are electrically connected with the power supply.
4. The coal mining subsidence ground crack height difference measuring device of claim 1, characterized in that: the telescopic connection spare is including the flexible chi of erecting, erecting chi brake screw, erecting chi fixed screw that have the scale, the one end setting of flexible perpendicular chi is in inside the second fixed member, erect chi brake screw, erect chi fixed screw and all set up on the second fixed member and rather than threaded connection, through erect chi brake screw and adjust the height of flexible perpendicular chi, through erect chi fixed screw is fixed the position of flexible perpendicular chi.
5. The coal mining subsidence ground crack height difference measuring device of claim 1, characterized in that: the light source emitting assembly further comprises a light source switch for controlling the light source emitter, and the light source switch is arranged on the first fixing rod piece.
6. The coal mining subsidence ground crack height difference measuring device of claim 1, characterized in that: the light source receiving assembly further comprises a knob and a light source receiving plate, the knob is arranged at the end of the telescopic vertical ruler and is in threaded connection with the end of the telescopic vertical ruler, the light source receiving plate is arranged on the knob and is detachably connected with the knob through a buckle, and the light source receiver is arranged on the light source receiving plate.
7. The coal mining subsidence ground crack height difference measuring device of claim 1, characterized in that: and the first base and the second base are both provided with inclination angle adjusting screws for adjusting the inclination angle of the table top of the base.
8. A coal mining subsidence ground crack height difference measuring method is characterized in that the height difference of ground cracks is measured by adopting the measuring device according to any one of claims 1-7, and the method comprises the following steps:
s1: measuring the average slope theta of the earth surface on two sides of the crack at multiple points on two sides of the crack by using a first base and a second base which are respectively arranged on two sides of the crack;
s2: a first base is arranged on the higher side of the crack, a second base is arranged on the lower side of the crack, the inclination angles of the first base and the second base are adjusted by adjusting the inclination angle adjusting screws on the first base and the second base, so that the table tops of the bases on the high side and the low side are kept parallel to the whole earth surface, and the connecting line of the two bases is perpendicular to the extension direction of the crack;
s3: emitting a light beam by using a light source emitter arranged at the top of a first fixed rod piece on the upper part of a first base at a selected point A at the higher side of the crack, receiving the light beam by using a light source receiver arranged on a light source receiving plate at the top of a second fixed rod piece on the upper part of a second base at a selected point B at the lower side of the crack, and reading the reading of the telescopic vertical ruler, namely the current measured value of the height difference of the crack;
s4: and repeating the steps S2 and S3 to obtain average crack height difference data according to multiple point selection measurements on two sides of the crack.
9. The coal mining subsidence ground fracture height difference measuring method of claim 8, characterized in that: and measuring the average slope theta of the earth surface on two sides at multiple selected points on two sides of the crack, wherein the theta is the slope of the earth surface near the crack in the direction vertical to the extension direction of the crack.
10. The coal mining subsidence ground fracture height difference measuring method of claim 9, characterized in that: the inclination angles of the first base and the second base are adjusted through the inclination angle adjusting screws, so that the table tops of the bases on the high side and the low side are kept parallel to the whole earth surface, that is, the inclination angles of the first base and the second base are all adjusted to be theta.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110949217.7A CN113739756A (en) | 2021-08-18 | 2021-08-18 | Coal mining subsidence ground crack height difference measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110949217.7A CN113739756A (en) | 2021-08-18 | 2021-08-18 | Coal mining subsidence ground crack height difference measuring device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114543753A (en) * | 2022-03-14 | 2022-05-27 | 晋能控股煤业集团有限公司 | DEM correction method for landform of subsidence crack area |
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| JP2002022419A (en) * | 2000-07-10 | 2002-01-23 | Sankyo Eng Kk | Crack width measuring device |
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| CN113029005A (en) * | 2021-04-08 | 2021-06-25 | 中国科学院武汉岩土力学研究所 | Ground fissure three-way displacement monitoring device and ground fissure three-way displacement monitoring method |
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| JP2002022419A (en) * | 2000-07-10 | 2002-01-23 | Sankyo Eng Kk | Crack width measuring device |
| CN202562406U (en) * | 2012-04-28 | 2012-11-28 | 中国神华能源股份有限公司 | Mining fissure monitoring device |
| CN103557838A (en) * | 2013-11-08 | 2014-02-05 | 重庆师范大学 | Portable farmland slope measurement device and measurement method |
| CN111504235A (en) * | 2020-06-09 | 2020-08-07 | 中国二十二冶集团有限公司 | Apparatus and method for measuring flatness using linear light source |
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| CN114543753A (en) * | 2022-03-14 | 2022-05-27 | 晋能控股煤业集团有限公司 | DEM correction method for landform of subsidence crack area |
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