CN117449902A - Stope roof overlying strata deformation damage height monitoring method - Google Patents
Stope roof overlying strata deformation damage height monitoring method Download PDFInfo
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- CN117449902A CN117449902A CN202311200385.1A CN202311200385A CN117449902A CN 117449902 A CN117449902 A CN 117449902A CN 202311200385 A CN202311200385 A CN 202311200385A CN 117449902 A CN117449902 A CN 117449902A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005553 drilling Methods 0.000 claims abstract description 76
- 239000013307 optical fiber Substances 0.000 claims abstract description 66
- 238000011161 development Methods 0.000 claims abstract description 42
- 239000011435 rock Substances 0.000 claims abstract description 34
- 238000005065 mining Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 8
- 238000007405 data analysis Methods 0.000 claims abstract description 7
- 238000004458 analytical method Methods 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 238000009933 burial Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 241001391944 Commicarpus scandens Species 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 description 6
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B47/13—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 by electromagnetic energy, e.g. radio frequency
- E21B47/135—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 by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/26—Storing data down-hole, e.g. in a memory or on a record carrier
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
Abstract
The invention discloses a stope roof overlying rock deformation damage height monitoring method, which comprises the steps of collecting basic data of a stope working face to be tested; acquiring the predicted height of development of two bands of mining of the ore deposit; determining the position of a tunnel in a stope working face and the position of a surrounding tunnel of the working face, and arranging underground directional monitoring drilling holes; performing directional drilling construction, installing a fixed distributed optical fiber in a hole and connecting a monitoring system; distributed optical fiber monitoring is performed in the working face stoping process; obtaining the development heights of two zones of overlying strata according to data analysis; the invention adopts a directional drilling method, realizes the consistency of the monitoring data acquisition sequence and the deformation and damage sequence of the overlying strata of the working face in the pit, and can solve the problem of inaccurate monitoring results caused by the conventional distributed optical fiber monitoring straight hole distribution mode in the pit. In addition, the distributed optical fiber installation in the directional drilling adopts a mode of pulling back from the drill tail to the orifice, so that the problem that the optical fiber is easy to break when the optical fiber is lowered from the orifice can be effectively prevented.
Description
Technical Field
The invention relates to the field of a method for monitoring deformation and damage heights of overlying rocks of stope roof, in particular to a method for monitoring deformation and damage heights of overlying rocks of stope roof.
Background
At present, in the method for obtaining the development heights of two bands, the distributed optical fiber monitoring method mainly uses the functions of strain and breakpoint monitoring of the distributed optical fiber, the distributed optical fiber is implanted into a section to be tested through drilling, and monitoring data of the optical fiber are obtained in the process of stoping a working face so as to analyze deformation and damage conditions of overlying strata of a top plate and further obtain the development height data of the two bands. The existing roof overlying rock monitoring method is divided into two modes, namely, vertical drilling is constructed on the corresponding ground of a working face stope, drilling is constructed on the inclined upward direction of the working face roof of a roadway arranged on two sides of the working face or in the working face, the drilling is straight, and monitoring optical fibers are installed in the drilling. Drilling construction and optical fiber installation are completed before working face stoping, and data of the optical fibers are monitored in real time in the working face stoping process, so that the development heights of the two zones of the overburden rock are analyzed and obtained.
The method for arranging the monitoring holes on the ground is adopted at present (as shown in fig. 3), the monitored data are the most accurate, because the cover rock fracture gradually develops upwards from the direct roof of the ore layer from time sequence, the ground drilling data collector is on the ground, the fracture development condition of the cover rock can be seen from bottom to top in real time by utilizing the monitoring data of the optical fiber and the breakpoint monitoring function, and the monitoring process is consistent with the cover rock fracture process. The data obtained by monitoring the underground layout monitoring drilling mode adopted at present has a large problem, and the heights of the two belts cannot be accurately indicated. At present, holes are generally drilled in roadways on two sides or in the surface of a working surface in underground monitoring, then the holes are arranged in the directions of the working top plate and the cutting holes of the working surface, and the maximum vertical height controlled by the holes is required to exceed the maximum height for predicting development of two bands.
As shown in fig. 4, since the deformation and fracture of the roof covering of the stope is generally advanced, and the advanced zone is not in a standard form, it is easy to cause the height of the two zones to be lower than the actual development height by means of the monitoring data. As shown in fig. 5, according to the monitoring data, the optical fiber with the vertical height of about 35m is found to have a breakpoint for the first time, the conventional method can judge that the development height of two bands is about 35m, and the development of two bands of the actual roof overlying strata exceeds 40m. The phenomenon is mainly caused by that the underground monitoring is to gradually obtain response data from the bottom of a hole to an orifice and gradually obtain monitoring parameters from the deep part to the shallow part of the overburden, and the actual overburden deformation damage gradually develops from the direct top to the deep part, so that the sequence of the monitoring data is opposite to the sequence of the overburden deformation damage, and misjudgment is easy to be formed. If the extension direction of the underground hole is changed, namely, the hole is opened from a roadway, and the direction opposite to the tangential direction is upward, so that the position of the orifice of the monitoring hole can be damaged firstly because the deformation of the roof overlying rock gradually develops from the direct top, the whole monitoring system can be damaged directly, and further data cannot be acquired.
In conclusion, the analysis is carried out, two distributed optical fiber monitoring hole arrangements of the stope cover rock mainly comprise two modes of ground and underground hole arrangement, the overall ground hole arrangement monitoring accuracy is higher, but the ground is required to be provided with a drilling field, some of the ground is limited by mountains, rivers and the like or is limited by policies, drilling conditions are not provided, and in addition, the drilling difficulty is high, the risk is high and the cost is high for working conditions with larger thickness of the cover rock loose layer, such as huge field coal fields in China. The conventional extension mode of the underground drilling is easy to cause errors in the monitoring result, and the whole-process monitoring cannot be realized by changing the extension direction.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a method for monitoring deformation and damage height of roof covering rock of a stope, which is essentially a method for monitoring drilling and hole distribution in a well, mainly utilizes a directional drilling process to arrange drilling field openings on a circumference or an internal roadway of a working surface to be tested in the well, a drilling track is upward firstly, bypasses the maximum positions of two predicted development heights, then the drilling track is downward again, finally, the roadway in the working surface is uncovered, then, a distributed optical fiber is installed in the whole hole, and monitoring data acquisition equipment is connected with the optical fiber at the drilling hole opening to realize monitoring of deformation and damage of the roof covering rock in the whole process of mining of the stope. The optical fiber in the drilling section in the downward direction of the drilling tail section realizes the function similar to ground drilling, the monitoring data acquisition is carried out from the bottom of the hole upwards, and the monitoring data is consistent with the deformation and damage direction of the covering rock of the stope.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a stope roof overlying strata deformation damage height monitoring method, which comprises the following steps:
s1, collecting basic data of a working face of a stope to be tested;
s2, preliminarily obtaining the predicted height of development of two zones of mining of the ore deposit by adopting an empirical formula, a standard recommendation formula and a numerical analysis method;
s3, determining the positions of the laneways in the stope working face and the positions of the laneways around the working face, and arranging underground directional monitoring drilling holes;
s4, directional drilling construction is carried out, and a fixed distributed optical fiber is installed in a hole and connected with a monitoring system;
s5, monitoring distributed optical fibers in the working face stoping process;
and S6, obtaining the development height of the two zones of the overlying strata according to data analysis.
Preferably, in step S1, the basic data includes mining thickness, mining process, roof covering structure, covering lithology, covering strength, seam burial depth, face length and width specification, seam inclination, face construction development.
Preferably, in step S2, if there is actual measurement data in the mine area adjacent to the mine, predicting two-zone development heights of the working face of the to-be-measured mine layer by using the data of the adjacent mine; or constructing a numerical analysis model according to the working conditions of the stope, and analyzing and calculating the development heights of the two zones of overburden.
Preferably, in step S3, if there is no tunnel in the stope working face, a position is selected, a section of in-plane tunnel is constructed along the seam from the tunnel openings on both sides of the working face into the stope working face, the length of the tunnel entering the working face is not less than 20m, and the underground directional monitoring drilling is arranged wholly according to the arrangement condition of the tunnel on the working face;
the highest point of the directional drilling is required to be higher than the predicted maximum height of development of the two belts, the coal seam thickness is taken to be 5 times higher, the drilling hole opening points are arranged in the laneways at the two sides of the stope working surface, and the overall extending direction of the directional drilling hole is the in-plane laneway which points to the cutting hole of the working surface and is connected at the opposite side; the directional hole track is upward firstly, bypasses the maximum position of the predicted development heights of the two zones, then the drilling track is downward again, and finally the roadway in the working surface is uncovered.
Preferably, in step S4, the drilling is performed according to the designed track, the orifice is provided with an orifice sleeve, the sleeve length is not less than 8m, after the drilling uncovers the in-plane roadway, a Kong Weitao pipe is also provided at the tail section of the drilling, and then the optical fiber is provided in the hole by means of back-dragging the distributed optical fiber; and finally grouting the monitoring drilling holes by adopting slurry, coupling the distributed optical fibers and drilling surrounding rock into a whole by adopting the slurry, and connecting the drilling hole optical fibers with distributed monitoring equipment to form a stope cover rock deformation damage monitoring system.
Preferably, in step S4, the optical fiber is pulled back in a manner that the optical fiber is placed in an in-plane roadway at the bottom of the hole, the optical fiber is connected to a drill bit in the hole, then the drill rod is pulled out from the drill hole, the optical fiber enters the drill hole along with the pulled-out drill bit, and after the drill rod is pulled out from the drill hole, the distributed optical fiber is installed in the monitored directional drill hole in a whole section.
Preferably, in step S5, in the working face extraction process, the distributed optical fiber monitoring is performed, relevant data is obtained through monitoring, the data monitoring starts from the position of the working face extraction position 100m away from the tail section of the directional drilling hole, the working face extraction ends to the position of the directional drilling hole opening point, and the monitoring frequency is not less than once a day.
Preferably, in step S6, the data analysis is performed to obtain the overburden strain data of the whole section of the drilling track, and further analysis is performed to obtain the deformation and damage condition of the overburden and the development height of the roof fracture, so as to obtain the two-zone development height of the actual measurement stope working surface.
The invention has the beneficial effects that: the invention adopts a directional drilling method, realizes the consistency of the monitoring data acquisition sequence and the deformation and damage sequence of the overlying strata of the working face in the pit, and can solve the problem of inaccurate monitoring results caused by the conventional distributed optical fiber monitoring straight hole distribution mode in the pit. In addition, the distributed optical fiber installation in the directional drilling adopts a mode of pulling back from the drill tail to the orifice, so that the problem that the optical fiber is easy to break when the optical fiber is lowered from the orifice can be effectively prevented.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a drilling arrangement in step S3 according to an embodiment of the present invention;
FIG. 2 is a plan view of the drilling layout in step S3 according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a prior art method of placing monitoring holes in the ground;
FIG. 4 is a cross-sectional view of a prior art downhole monitoring hole arrangement;
fig. 5 is a graph showing the results of monitoring deformation of a certain overlying strata of a mine in the prior art.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment provides a stope roof overlying strata deformation damage height monitoring method, which comprises the following specific steps: (1) collecting basic data of a stope working face to be measured, firstly obtaining predicted heights of development of two zones of mining layer by adopting methods such as an empirical formula, a standard recommended formula, numerical analysis and the like, secondly determining positions of a roadway in the stope working face and positions of a circumferential roadway of the working face, thirdly, arranging underground directional monitoring drilling, secondly, carrying out directional drilling construction, thirdly, installing fixed distributed optical fibers in the holes, and thirdly, connecting a monitoring system thirdly, secondly, carrying out distributed optical fiber monitoring in the stope working face, thirdly, obtaining the development heights of the two zones of the overburden according to data analysis.
(1) Basic data of a working face of a stope to be measured is collected, wherein the basic data comprise mining thickness, mining technology, roof overlying rock structure, overlying rock lithology, overlying rock strength, mineral seam burial depth, working face length and width specification, mineral seam inclination angle, working face structural development condition and the like.
(2) The prediction heights of the two development zones of the mining layer are preliminarily obtained by adopting methods such as an empirical formula, a standard recommendation formula, numerical analysis and the like, and if the mine area is close to the existing measured data of the mine, the two development heights of the working face of the mining layer to be detected can be predicted by utilizing the data of the mine close to the mine; the two-zone development height prediction can also be performed by using the formula recommended in the original national security administration, the original national coal mine security administration, the national energy administration, the national railway administration and the 2017 combined release of the building, the water body, the railway and the main roadway coal pillar reserving and coal pressing exploitation standard; the numerical analysis model can be constructed according to the working conditions of the stope, and the development heights of the two zones of the overburden rock can be calculated through analysis; the calculation formula recommended in the handbook for preventing and controlling water in coal mine can be adopted to predict the development height of two bands.
(3) Determining the positions of the laneways in the stope working face and the positions of the laneways around the working face, if no laneways exist in the stope working face, selecting one position, constructing a section of in-plane laneways from laneway openings at two sides of the working face to the stope working face along the seam, and arranging underground directional monitoring drilling holes according to the arrangement condition of the laneways of the working face. The drilling arrangement section is shown in fig. 1, the plane of the drilling arrangement section is shown in fig. 2, the highest point of the directional drilling is required to be higher than the predicted maximum height of two zones of development, the thickness of the coal seam is generally higher than 5 times, the drilling opening points are arranged in the lanes on two sides of the stope working face, and the overall extending direction of the directional drilling is directed to the cutting holes of the working face and the in-plane lanes connected on the opposite sides. The directional hole track is upward firstly, bypasses the maximum position of the predicted development heights of the two zones, then the drilling track is downward again, and finally the roadway in the working surface is uncovered.
(4) And (3) performing directional drilling construction, installing and fixing a distributed optical fiber in the hole, connecting a monitoring system, performing construction on the hole according to a designed track, installing a hole sleeve at the hole opening, enabling the sleeve to be at least 8m long, installing a Kong Weitao pipe at the tail section of the hole to be about 8m after the hole is uncovered in the surface tunnel, and installing the optical fiber in the hole in a mode of pulling the distributed optical fiber back. The mode of drawing back the optical fiber is that the optical fiber is firstly placed in an in-plane roadway at the bottom of a hole, the optical fiber is connected to a drill bit in the hole, then a drill rod is pulled out from the drill hole, the optical fiber enters the drill hole along with the pulled out drill bit, and after the drill rod is pulled out from the drill hole, the distributed optical fiber is installed in the monitored directional drill hole in a whole section. And finally grouting the monitoring drilling hole by adopting slurry, coupling the distributed optical fiber and the drilling surrounding rock into a whole by adopting the slurry, and connecting the drilling hole opening optical fiber with distributed monitoring equipment (generally BOTDR/A, namely a distributed optical fiber demodulator, and adopting a covering rock deformation distributed optical fiber detection method according to the reference invention ZL 201410530675.7) to form the stope covering rock deformation damage monitoring system.
(5) And in the working face extraction process, the distributed optical fiber monitoring is carried out, the data is obtained by monitoring, the data monitoring is carried out from the position of the working face extraction position 100m away from the tail section of the directional drilling hole to the position of the working face extraction to the opening point of the directional drilling hole, and the monitoring frequency is not less than once per day.
(6) And analyzing the development height of the two zones of the overburden according to the data. And obtaining overlying strata strain data of the whole section of the monitoring drilling track through data analysis, further analyzing and obtaining deformation damage condition of overlying strata and development height of roof cracks, and further analyzing and obtaining two-band development heights of the actual measurement stope working surface.
The invention adopts a directional drilling method, realizes the consistency of the monitoring data acquisition sequence and the deformation and damage sequence of the overlying strata of the working face in the pit, and can solve the problem of inaccurate monitoring results caused by the conventional distributed optical fiber monitoring straight hole distribution mode in the pit. In addition, the distributed optical fiber installation in the directional drilling adopts a mode of pulling back from the drill tail to the orifice, so that the problem that the optical fiber is easy to break when the optical fiber is lowered from the orifice can be effectively prevented.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The method for monitoring the deformation and damage height of the roof covering rock of the stope is characterized by comprising the following steps of:
s1, collecting basic data of a working face of a stope to be tested;
s2, preliminarily obtaining the predicted height of development of two zones of mining of the ore deposit by adopting an empirical formula, a standard recommendation formula and a numerical analysis method;
s3, determining the positions of the laneways in the stope working face and the positions of the laneways around the working face, and arranging underground directional monitoring drilling holes;
s4, directional drilling construction is carried out, and a fixed distributed optical fiber is installed in a hole and connected with a monitoring system;
s5, monitoring distributed optical fibers in the working face stoping process;
and S6, obtaining the development height of the two zones of the overlying strata according to data analysis.
2. The method of claim 1, wherein in step S1, the basic data includes mining thickness, mining process, roof covering structure, covering lithology, covering strength, seam burial depth, face length and width specification, seam inclination, face structure development.
3. The method for monitoring the deformation and damage height of the roof covering rock of a stope according to claim 1, wherein in the step S2, if actual measurement data exists in a mine near a mine, the development heights of two bands of the working face of the to-be-measured seam are predicted by using the data of the near mine; or constructing a numerical analysis model according to the working conditions of the stope, and analyzing and calculating the development heights of the two zones of overburden.
4. The method for monitoring the deformation and damage height of the roof covering rock of a stope according to claim 1, wherein in the step S3, if no tunnel exists in the stope working face, a position is selected, a section of in-plane tunnel is constructed from tunnel openings on two sides of the working face to the stope working face along a mineral seam, the length of the tunnel entering the working face is not less than 20m, and underground directional monitoring drilling holes are arranged wholly according to the arrangement condition of the tunnel of the working face;
the highest point of the directional drilling is required to be higher than the predicted maximum height of development of the two belts, the coal seam thickness is taken to be 5 times higher, the drilling hole opening points are arranged in the laneways at the two sides of the stope working surface, and the overall extending direction of the directional drilling hole is the in-plane laneway which points to the cutting hole of the working surface and is connected at the opposite side; the directional hole track is upward firstly, bypasses the maximum position of the predicted development heights of the two zones, then the drilling track is downward again, and finally the roadway in the working surface is uncovered.
5. The method for monitoring the deformation and damage height of the roof covering rock of a stope according to claim 1, wherein in the step S4, a drill hole is constructed according to a designed track, a hole opening is provided with a hole opening sleeve, the sleeve length is not less than 8m, after the drill hole uncovers an in-plane tunnel, a Kong Weitao pipe is also provided at the tail section of the drill hole for 8m, and then an optical fiber is provided in the hole in a back-dragging distributed optical fiber mode; and finally grouting the monitoring drilling holes by adopting slurry, coupling the distributed optical fibers and drilling surrounding rock into a whole by adopting the slurry, and connecting the drilling hole optical fibers with distributed monitoring equipment to form a stope cover rock deformation damage monitoring system.
6. The method for monitoring the deformation damage height of the roof covering rock of a stope according to claim 5, wherein in the step S4, the optical fiber is pulled back in a mode that the optical fiber is firstly placed in an in-plane tunnel at the bottom of a hole, the optical fiber is connected to a drill bit in the hole, then a drill rod is pulled out from the drill hole, the optical fiber enters the drill hole along with the pulled-out drill bit, and after the drill rod is pulled out from the drill hole completely, the distributed optical fiber full section is installed in the monitored directional drill hole.
7. The method for monitoring deformation damage height of stope roof cover rock according to claim 1, wherein in step S5, distributed optical fiber monitoring is performed during stoping of the working face, relevant data is obtained through monitoring, the data monitoring starts from a position 100m away from a tail section of the directional drilling hole at a stoping position of the working face to a position of a hole opening point of the directional drilling hole, and the monitoring frequency is not less than once a day.
8. The method for monitoring deformation and damage heights of roof cover rocks of a stope according to claim 1, wherein in the step S6, cover rock strain data of a whole section of a drilling track is obtained through data analysis, deformation and damage conditions of the cover rocks and development heights of roof cracks are further obtained through analysis, and further two-band development heights of a working face of the actual stope are obtained through analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311200385.1A CN117449902A (en) | 2023-09-18 | 2023-09-18 | Stope roof overlying strata deformation damage height monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311200385.1A CN117449902A (en) | 2023-09-18 | 2023-09-18 | Stope roof overlying strata deformation damage height monitoring method |
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| Publication Number | Publication Date |
|---|---|
| CN117449902A true CN117449902A (en) | 2024-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311200385.1A Pending CN117449902A (en) | 2023-09-18 | 2023-09-18 | Stope roof overlying strata deformation damage height monitoring method |
Country Status (1)
| Country | Link |
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| CN (1) | CN117449902A (en) |
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2023
- 2023-09-18 CN CN202311200385.1A patent/CN117449902A/en active Pending
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