CN111256652A - Rock stratum settlement observation device and rock stratum settlement amount obtaining method - Google Patents
Rock stratum settlement observation device and rock stratum settlement amount obtaining method Download PDFInfo
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- CN111256652A CN111256652A CN202010100166.6A CN202010100166A CN111256652A CN 111256652 A CN111256652 A CN 111256652A CN 202010100166 A CN202010100166 A CN 202010100166A CN 111256652 A CN111256652 A CN 111256652A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
Abstract
The application discloses rock stratum settlement observation device and rock stratum settlement amount obtaining method, which includes: survey drilling, first sleeve pipe, second sleeve pipe, a plurality of magnetic ring, logging cable and electromagnetic sensor that subside, first sleeve pipe sets up in the observation drilling, a plurality of magnetic ring that subside are established parallelly according to the direction that is on a parallel with the observation drilling degree of depth are established on the first sleeve pipe, a plurality of magnetic rings that subside are located first sleeve pipe and are surveyed between the drilling, still pack the coagulant between first sleeve pipe and the observation drilling, the second sleeve pipe nestification is in first sleeve pipe, the logging cable drives electromagnetic sensor and is in the second sleeve pipe is intraductal along the direction removal that is on a parallel with the observation drilling degree of depth, the logging cable is connected with the electromagnetic sensor electricity. By the method and the device, timeliness and accuracy of rock stratum settlement observation can be greatly improved.
Description
Technical Field
The application relates to the technical field of coal mine geological exploration, in particular to a rock stratum settlement observation device and method.
Background
At present, rock stratum settlement observation is mainly realized by measuring the settlement of the earth surface. Technical research personnel discover that the existing settlement amount of the earth surface has certain hysteresis quality when observing the settlement of the rock stratum, and the settlement change of each stratum is difficult to be reflected in time, so that the observation result is not accurate enough in the process of realizing the method.
Disclosure of Invention
In view of the above, the present application provides a rock stratum settlement observation device and a rock stratum settlement amount obtaining method to solve the above technical problems.
The application provides a rock stratum settlement observation device, it includes: survey drilling, first sleeve pipe, second sleeve pipe, a plurality of magnetic ring, logging cable and electromagnetic sensor that subside, first sleeve pipe sets up in the observation drilling, a plurality of magnetic ring that subside are established parallelly according to the direction that is on a parallel with the observation drilling degree of depth are established on the first sleeve pipe, a plurality of magnetic rings that subside are located first sleeve pipe and are surveyed between the drilling, still pack between first sleeve pipe and the observation drilling and have the coagulant of linking first sleeve pipe and observation drilling as an organic whole, the second sleeve pipe nestification is in first sleeve pipe, the logging cable drives electromagnetic sensor and is in the second sleeve pipe is intraductal along the direction removal that is on a parallel with the observation drilling degree of depth, the logging cable is connected with the electromagnetic sensor electricity.
Optionally, the method further comprises: the pulley hangs above the observation borehole, and the logging cable is walked around the pulley, connects the winch with the electromagnetic sensor.
Optionally, the method further comprises: soluble clamp, every subside the magnetic ring and all fix on first sleeve pipe through two soluble clamp, subside the magnetic ring and be located between two soluble clamp.
Optionally, the method further comprises: and the first sleeve is connected with the ground surface through the connecting flange.
Optionally, the magnetic settlement device further comprises at least three fixed iron sheets, the at least three fixed iron sheets are uniformly distributed along the circumferential direction of the settlement magnetic ring, a first end of each fixed iron sheet is fixed on the settlement magnetic ring, a second end opposite to the first end is located between the settlement magnetic ring and the observation drill hole and extends towards the direction close to the bottom of the observation drill hole, a horizontal flanging is arranged at the second end, and the horizontal flanging is perpendicular to the hole depth direction of the observation drill hole.
Optionally, the aperture of the observation borehole is larger than or equal to 127 mm.
Optionally, the first sleeve is a PVC pipe.
Optionally, the second casing is a glass fibre reinforced plastic casing.
Optionally, the setting agent is a cement slurry.
The application also provides a rock stratum settlement amount obtaining method based on the rock stratum settlement observation device, which comprises the following steps: an observation drill hole is drilled in the subsidence area of the rock stratum to be detected, and the observation drill hole penetrates through the rear final hole of the bottom plate of the target coal seam; installing a settlement magnetic ring on the first sleeve, and putting the first sleeve into the observation drill hole; a second sleeve is arranged in the first sleeve; injecting a coagulant between the observation borehole and the first casing; monitoring the advancing distance of the stope face after the coagulant is solidified; when the stope face is pushed to a first preset distance away from the observation drill hole, an electromagnetic sensor is lowered into the second sleeve at a constant speed, and the initial position of each settlement magnetic ring is obtained; lifting the electromagnetic sensor at a constant speed to obtain the settlement position of each settlement magnetic ring; and calculating the settlement amount of the rock stratum according to the settlement position and the initial position.
The utility model provides a rock stratum settlement observation device and rock stratum settlement volume acquisition method is through setting up the observation drilling, first sleeve pipe, the second sleeve pipe, a plurality of subside magnetic ring, logging cable and electromagnetic sensor, through laying subside the magnetic ring and link as an organic wholely with the pore wall of observing the drilling in different depth positions, every electric signal of subsiding the magnetic ring of electromagnetic sensor response, in order to obtain the rock stratum settlement volume of different depths, can improve rock stratum settlement volume observation's promptness and accuracy greatly, and can also realize that 1 logging cable observes a plurality of settlement points, not only can save observation time, improve observation efficiency, can simplify observation device, increase measurement point quantity.
Drawings
Fig. 1 is a schematic structural view of the rock formation settlement observation device of the present application.
Fig. 2 is an installation schematic diagram of the settlement magnet ring of the present application.
Fig. 3 is a flow chart of a formation-settling volume acquisition method of the present application.
Detailed Description
The technical solutions of the present application are described in detail below with reference to the accompanying drawings and specific embodiments. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Fig. 1 shows a schematic structural diagram of a rock formation settlement observation device provided by the present application, as shown in fig. 1, and the rock formation settlement observation device includes: the system comprises an observation borehole 4, a first casing 5, a second casing 3, a plurality of settlement magnet rings 7, a logging cable 6 and an electromagnetic sensor 8.
The first sleeve 5 is arranged in the observation drill hole 4, the plurality of sedimentation magnetic rings 7 are sleeved on the first sleeve 5 in parallel according to the direction parallel to the depth of the observation drill hole 4, and the plurality of sedimentation magnetic rings 7 are positioned between the first sleeve 5 and the observation drill hole 4.
And a coagulant is filled between the first sleeve 5 and the observation borehole 4, and the first sleeve 5 and the observation borehole 4 are connected into a whole by the coagulant. The second sleeve 3 is nested within the first sleeve 5.
In this embodiment, the bore diameter of the borehole 4 is observed to be not less than 127mm, the first casing 5 is made of PVC (polyvinyl chloride) casing having a bore diameter of about 89mm, and the second casing 3 is made of glass fiber reinforced plastic casing having a bore diameter of about 50 mm.
The logging cable 6 drives the electromagnetic sensor 8 to move in the second casing 4 in a direction parallel to the depth of the observation borehole 4. The logging cable 6 is electrically connected with an electromagnetic sensor 8.
In one embodiment, the electromagnetic sensor 8 is model No. SS495A, and the logging cable is a connection line for hanging connection and transmitting measurement data between the surface system and the underground instrument, and belongs to the existing equipment. The type of the settlement magnetic ring 7 is JK-53.
When the rock stratum settlement observation device is used, an observation borehole 4 is firstly drilled on a rock stratum settlement area to be measured, and the observation borehole 4 is drilled through a bottom plate of a target coal seam 11 to form a final hole.
Rock strata to be observed is selected from the strata exposed by the observation borehole 4, the strata with larger layer thickness and higher rock compressive strength are generally selected as observation layers, and one observation layer at least corresponds to one settlement magnetic ring 7.
After the pre-inserting depth of each settlement magnetic ring 7 is calculated, the settlement magnetic rings 7 are installed at preset positions one by one. The first casing 5 is then lowered section by section into the observation borehole 4 and brought to the bottom of the hole.
The second casing 3 is then lowered into the first casing 5 as an observation channel. The second casing 3 serves to protect the electromagnetic sensor 8 and the logging cable 6 during subsequent data observations.
A coagulant is injected into the space between the first casing 5 and the wall of the observation borehole 4. And solidifying for more than 48 hours to fully solidify the sedimentation magnetic ring 7 and the rock stratum of the hole wall of the observation drill hole 4 into a whole. In the implementation, the coagulant is cement paste to reduce the cost.
When the stope face is pushed to the position near the observation drill hole 4 (generally about 100m away from the observation drill hole), the electromagnetic sensor 8 is put into the second sleeve 3, the initial position of the settlement magnetic ring 7 is observed, after reference measurement is carried out, the settlement of the rock stratum is observed, and the observation is carried out once every 12-15 min. When lifting or lowering at every time, the electromagnetic sensor 8 needs to pass through all the settlement magnetic rings 7, and the sensed electric signals and the depth of the settlement magnetic rings 7 are sent to an upper computer for a worker to check.
When the electromagnetic sensor 8 is lifted or lowered, the constant speed is kept, and the peak moment of the electric signal is taken as a time point for observing the measuring rope, so that the measuring precision is ensured.
The utility model provides a rock stratum settlement observation device is through setting up the observation drilling, first sleeve pipe, the second sleeve pipe, a plurality of subside magnetic ring, logging cable and electromagnetic sensor, through laying at different degree of depth positions subside the magnetic ring and even as an organic whole with the pore wall of observing the drilling, every electric signal of subsiding the magnetic ring of electromagnetic sensor response, in order to obtain the rock stratum settlement of the different degree of depth, can improve the timeliness and the accuracy that the rock stratum settlement was surveyd greatly, and still can realize that 1 logging cable is surveyd a plurality of settlement points, not only can save the observation time, improve observation efficiency, still can simplify observation device, increase measurement station quantity.
Further, the rock stratum settlement observation device also comprises: winch 1 and sheave 2.
The pulley 2 is suspended directly above the observation borehole 4, for example, the pulley 2 may be suspended directly above the observation borehole 4 using existing brackets.
The logging cable 6 passes around the pulley 2 and connects the winch 1 with the electromagnetic sensor 8.
By arranging the winch 1 and the pulley 2, the mechanical lifting of the electromagnetic sensor 8 can be realized, the labor intensity of workers is reduced, and the consistency of the lifting speed of the electromagnetic sensor 8 can be facilitated.
Preferably, as shown in fig. 2, the formation settlement observation apparatus further includes: soluble clamp 10, soluble clamp 10 is existing equipment.
Each settlement magnetic ring 7 is fixed on the first sleeve 5 through two soluble hoops 10, and the settlement magnetic ring 7 is located between the two soluble hoops 10.
Each settlement magnetic ring 7 is fixed on the first sleeve 5 through two soluble clamps 10, so that the installation firmness of the settlement magnetic ring 7 can be improved, and the settlement magnetic ring 7 is prevented from sliding during construction.
Moreover, the soluble hoop 10 can be gradually decomposed after the coagulant is added, and the free movement of the sedimentation magnetic ring 7 on the first sleeve 5 is not influenced. When the rock stratum subsides, realize subsiding magnetic ring 7 and rock mass and subside together in step.
Preferably, the formation settlement observation apparatus further comprises: and the first sleeve 5 is connected with the ground surface through the connecting flange so as to ensure the installation firmness of the first sleeve 5.
In this embodiment, the aperture of the connection flange is larger than the observation borehole 4. The connecting flange is also an existing device and is fixed on the ground surface by using a steel pipe with the aperture of about 159 mm.
Further, the rock stratum settlement observation device comprises at least three fixed iron sheets 9, and the at least three fixed iron sheets 9 are uniformly distributed along the circumferential direction of the settlement magnet ring 7.
The first end of each fixed iron sheet 9 is fixed on the sedimentation magnetic ring 7, and the second end opposite to the first end is positioned between the sedimentation magnetic ring 7 and the observation borehole 4 and extends towards the direction close to the bottom of the observation borehole 4.
And a horizontal flanging is arranged at the second end of the fixed iron sheet 9 and is vertical to the hole depth direction of the observation drilling hole. In this embodiment, the fixed iron piece is a rectangular piece.
Through setting up fixed iron sheet 4, can make subside magnetic ring 7 even more and survey the pore wall of drilling 4 and link as an organic wholely, guarantee to subside the synchronism of magnetic ring 7 and rock mass subside, improve the accuracy of surveing.
Further, the rock stratum settlement observation device further comprises an upper computer, and the electromagnetic sensor 8 and the winch 1 are electrically connected with the upper computer.
The upper computer controls the winch 1 to lift the electromagnetic sensor 8 at regular time so as to realize automatic data acquisition. The electromagnetic sensor 8 transmits data to an upper computer in a wireless transmission mode, and the upper computer stores and displays the data.
Wherein, the host computer is the existing equipment. The upper computer is electrically connected with the electromagnetic sensor 8 and the winch 1 by adopting the existing circuit connection mode. The upper computer adopts the existing logic programming to realize the control function.
By arranging the upper computer, automatic data acquisition can be realized, and the automation level of observation is improved.
Based on the rock stratum settlement observation device, as shown in fig. 3, the present application further provides a rock stratum settlement amount obtaining method, which includes:
s100, drilling an observation borehole on a subsidence area of a rock stratum to be detected, and drilling the observation borehole through a rear final hole of a bottom plate of a target coal seam;
s200, mounting a settlement magnetic ring on the first sleeve, and putting the first sleeve into the observation drill hole;
s300, inserting a second sleeve into the first sleeve;
s400, injecting a coagulant between the observation drill hole and the first sleeve;
s500, after the coagulant is solidified, monitoring the advancing distance of the stope face;
s600, when the stope face is pushed to a first preset distance away from the observation drill hole, an electromagnetic sensor is lowered into the second sleeve at a constant speed, and the initial position of each settlement magnetic ring is obtained;
in the present embodiment, the first predetermined distance is about 100 m.
S700, lifting the electromagnetic sensor at a constant speed to obtain the settlement position of each settlement magnetic ring;
and S800, calculating the settlement amount of the rock stratum according to the settlement position and the initial position.
And obtaining the settlement amount of the rock stratum according to the difference value of the front position and the rear position of the same settlement magnetic ring.
Furthermore, after the stope face is pushed by a second preset distance of the observation drill hole, the observation time interval is increased to 4-5 times of the original observation time interval, so that the cost is saved.
The original observation time interval is 12-15 minutes, and the increased observation time interval is 1 h. In this embodiment, the second predetermined distance is about 200 m.
According to the rock stratum settlement amount obtaining method, the observation drill hole, the first sleeve, the second sleeve, the multiple settlement magnetic rings, the logging cable and the electromagnetic sensor are arranged, the settlement magnetic rings are arranged at different depth positions and are connected with the hole wall of the observation drill hole into a whole, the electromagnetic sensor senses the electric signals of each settlement magnetic ring, so that the rock stratum settlement amount of different depths can be obtained, the timeliness and the accuracy of rock stratum settlement amount observation can be greatly improved, in addition, 1 logging cable can be used for observing the multiple settlement points, the observation time can be saved, the observation efficiency is improved, the observation device can be simplified, and the number of measuring points is increased.
The technical solutions of the present application are described in detail with reference to specific embodiments, which are used to help understand the ideas of the present application. The derivation and modification made by the person skilled in the art on the basis of the specific embodiment of the present application also belong to the protection scope of the present application.
Claims (10)
1. A rock formation settlement observation device, comprising: survey drilling, first sleeve pipe, second sleeve pipe, a plurality of magnetic ring, logging cable and the electromagnetic sensor of subsiding, first sleeve pipe sets up in the observation drilling, a plurality of magnetic ring of subsiding are according to being on a parallel with the ground cover of the direction of observing the drilling depth and are established on the first sleeve pipe, a plurality of magnetic rings of subsiding are located first sleeve pipe and are observed between the drilling, still pack between first sleeve pipe and the observation drilling and have the coagulant of linking first sleeve pipe and observation drilling as an organic whole, the second sleeve pipe nestification is in first sleeve pipe, the logging cable drives the electromagnetic sensor and removes along the direction that is on a parallel with the observation drilling depth in the second sleeve pipe, the logging cable is connected with the electromagnetic sensor electricity.
2. The formation settlement observation device of claim 1, further comprising: the pulley hangs above the observation borehole, and the logging cable is walked around the pulley, connects the winch with the electromagnetic sensor.
3. The formation settlement observation device of claim 1, further comprising: soluble clamp, every subside the magnetic ring and all fix on first sleeve pipe through two soluble clamp, subside the magnetic ring and be located between two soluble clamp.
4. The formation settlement observation device of claim 1, further comprising: and the first sleeve is connected with the ground surface through the connecting flange.
5. The apparatus for observing rock stratum settlement as claimed in claim 1, further comprising at least three fixed iron pieces, wherein the at least three fixed iron pieces are uniformly distributed along the circumference of the settlement magnet ring, a first end of each fixed iron piece is fixed on the settlement magnet ring, a second end opposite to the first end is located between the settlement magnet ring and the observation bore hole and extends toward a direction close to the bottom of the observation bore hole, and a horizontal flange is provided on the second end and is perpendicular to the depth direction of the observation bore hole.
6. The rock formation settlement observation device of claim 1, wherein the observation borehole has an aperture of 127mm or more.
7. The formation settlement observation device of claim 1, wherein the first casing is a PVC pipe.
8. The formation settlement observation device of claim 1 wherein the second casing is a glass reinforced plastic casing.
9. The formation settlement observation device of claim 1, wherein the setting agent is cement slurry.
10. A method for obtaining a rock formation settlement amount based on the rock formation settlement observation device according to any one of claims 1 to 9, comprising:
an observation drill hole is drilled in the subsidence area of the rock stratum to be detected, and the observation drill hole penetrates through the rear final hole of the bottom plate of the target coal seam;
installing a settlement magnetic ring on the first sleeve, and putting the first sleeve into the observation drill hole;
a second sleeve is arranged in the first sleeve;
injecting a coagulant between the observation borehole and the first casing;
monitoring the advancing distance of the stope face after the coagulant is solidified;
when the stope face is pushed to a first preset distance away from the observation drill hole, an electromagnetic sensor is lowered into the second sleeve at a constant speed, and the initial position of each settlement magnetic ring is obtained;
lifting the electromagnetic sensor at a constant speed to obtain the settlement position of each settlement magnetic ring;
and calculating the settlement amount of the rock stratum according to the settlement position and the initial position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010100166.6A CN111256652A (en) | 2020-02-18 | 2020-02-18 | Rock stratum settlement observation device and rock stratum settlement amount obtaining method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010100166.6A CN111256652A (en) | 2020-02-18 | 2020-02-18 | Rock stratum settlement observation device and rock stratum settlement amount obtaining method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195903A (en) * | 2020-09-01 | 2021-01-08 | 神华神东煤炭集团有限责任公司 | Device and method for measuring rock-soil layer settlement and application |
-
2020
- 2020-02-18 CN CN202010100166.6A patent/CN111256652A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 郭科等: "陆上土体分层沉降自动电测系统", 《中国港湾建设》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195903A (en) * | 2020-09-01 | 2021-01-08 | 神华神东煤炭集团有限责任公司 | Device and method for measuring rock-soil layer settlement and application |
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Application publication date: 20200609 |