CN116291186A - Deep high-ground-stress roadway surrounding rock drilling pressure relief structure and effect evaluation method thereof - Google Patents
Deep high-ground-stress roadway surrounding rock drilling pressure relief structure and effect evaluation method thereof Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 140
- 239000011435 rock Substances 0.000 title claims abstract description 108
- 230000000694 effects Effects 0.000 title claims abstract description 42
- 238000011156 evaluation Methods 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 52
- 238000006073 displacement reaction Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 11
- 230000003578 releasing effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 4
- 238000009662 stress testing Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 208000008918 voyeurism Diseases 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F17/18—Special adaptations of signalling or alarm devices
- E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The application discloses a deep high-ground stress roadway surrounding rock drilling pressure relief structure and an effect evaluation method thereof, wherein the deep high-ground stress roadway surrounding rock drilling pressure relief structure comprises pressure relief drilling groups, a stress monitoring system and a displacement monitoring system, wherein a plurality of groups of pressure relief drilling groups are arranged at intervals on surrounding rocks at different positions of a roadway, and each group of pressure relief drilling groups are positioned in a range from shoulder pits to side angles at two sides of the roadway and distributed in a sector shape; the stress monitoring system is pre-embedded at one side of the roadway to monitor the stress change of surrounding rock of the roadway before and after the pressure relief drilling is drilled; the displacement monitoring system is arranged on the surface of the surrounding rock of the roadway to monitor the displacement evolution characteristics of the surrounding rock of the roadway under the action of pressure relief drilling; the method and the device can realize rapid pressure relief of the high-ground stress roadway surrounding rock, accurately monitor the surrounding rock stress and displacement evolution characteristics under the action of drilling pressure relief, increase the roadway surrounding rock pressure relief effect and efficiency, and can completely evaluate the pressure relief effect in real time through comprehensive monitoring means.
Description
Technical Field
The application relates to the technical field of surrounding rock pressure relief of underground coal mine roadways, in particular to a deep high-ground-stress roadway surrounding rock drilling pressure relief structure and an effect evaluation method thereof.
Background
At present, shallow coal resources are gradually reduced, and middle east mines in China are gradually shifted to deep mining stages. High ground stress is usually applied to the deep part, the contradiction between high stress and low strength of surrounding rock is prominent, and the roadway is often deformed, unstable and damaged. The deformation of surrounding rock of a deep roadway is difficult to control efficiently in the traditional support mode, the repair rate of the roadway is greatly increased, major potential safety hazards and economic losses are caused, and the problems of deep high stress and large deformation of the roadway become bottlenecks for restricting safe and efficient exploitation of coal resources.
The pressure relief technology can improve the stress environment of the surrounding rock of the roadway, and reduce or transfer the high-stress peak distribution of the surrounding rock, so that the deformation of the surrounding rock is reduced, and the ground pressure treatment effect is improved. The pressure relief methods commonly used at present mainly comprise a pressure relief groove method, a loosening blasting method, a digging pressure relief roadway or chamber method and the like. At present, researches on the aspects of deep high-stress roadway drilling pressure relief mechanism, key parameter selection, supporting technology optimization design after pressure relief and the like are far immature, systematic researches are lacking, the pressure relief effect is not ideal, and an evaluation system for the pressure relief effect is not perfect, so that a deep high-stress roadway surrounding rock drilling pressure relief technology with good pressure relief effect and simple operation and a perfect effect evaluation method thereof are needed.
Disclosure of Invention
In order to solve the above problems, the embodiment of the application provides a deep high ground stress roadway surrounding rock drilling pressure relief structure and an effect evaluation method thereof, which increase the pressure relief effect and efficiency of the roadway surrounding rock and can completely evaluate the pressure relief effect in real time through a comprehensive monitoring means, and the technical scheme is as follows:
the first aspect of the application provides a deep high-ground stress roadway surrounding rock drilling pressure relief structure, which comprises pressure relief drilling groups, a stress monitoring system and a displacement monitoring system, wherein a plurality of groups of the pressure relief drilling groups are arranged at intervals on surrounding rocks at different positions of a roadway, and each group of the pressure relief drilling groups is positioned in a range from shoulder pits to side angles at two sides of the roadway and distributed in a fan shape; the stress monitoring system is pre-embedded at one side of the roadway to monitor the stress change of surrounding rock of the roadway before and after the pressure relief drilling is drilled; the displacement monitoring system is arranged on the surface of the surrounding rock of the roadway to monitor the displacement evolution characteristics of the surrounding rock of the roadway under the action of pressure relief drilling.
For example, in the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, the stress monitoring system comprises a stress testing hole, a stress sensor and a fiber bragg grating demodulator, wherein the stress testing hole is arranged in a pressure relief area at one side of the roadway and penetrates through the roadway surrounding rock; the stress sensors are respectively arranged at different depths of the holes in the stress test hole so as to continuously monitor the stress field change of the roadway surrounding rock in the pressure relief process; and the fiber bragg grating demodulator is in data connection with the stress sensor.
For example, in one embodiment, a deep high ground stress roadway surrounding rock drilling pressure relief structure is provided, the displacement monitoring system includes displacement meters disposed on the roadway surrounding rock surface, in the roadway interior, and in the pressure relief drilling.
For example, in the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, a peeping instrument is arranged in the pressure relief drilling hole, and the convergence condition of the pressure relief drilling hole is monitored in real time.
For example, in the deep high-ground-stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, the distance between two adjacent pressure relief drilling groups is 20m, the diameter of a single hole of each pressure relief drilling group is 130mm, and the length of the single hole is 4-5 times of the roadway width.
For example, in the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, drilling pressure relief is performed after the roadway is excavated, and each group of pressure relief drilling groups is arranged in four rows from shoulder pits to side angles at two sides of the roadway and is arranged in a fan shape.
The second aspect of the application provides an effect evaluation method of a deep high-ground stress roadway surrounding rock drilling pressure relief structure, which comprises the following steps: s1, installing a stress monitoring system; s2, installing a displacement monitoring system; s3, drilling and pressure relief are carried out on surrounding rocks at different positions of the roadway; and S4, monitoring the stress change of surrounding rocks of the roadway before and after the pressure relief of the drilling hole through a stress monitoring system, monitoring the displacement evolution characteristics of the surrounding rocks of the roadway under the action of the pressure relief drilling hole through a displacement monitoring system, and evaluating the pressure relief effect.
For example, in the method for evaluating the effect of the deep high ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, the installing stress monitoring system in S1 includes the following steps: firstly, drilling a stress test hole on one side of a roadway, flushing through holes after drilling is completed, and discharging rock slag; secondly, burying stress sensors in different depths of the stress test holes, and connecting the stress sensors with a fiber bragg grating demodulator through optical fibers; thirdly, cement slurry is filled into the stress testing holes for compaction; and fourthly, after the slurry is solidified, tracking and observing stress data acquired by a corresponding force sensor by adopting a fiber bragg grating demodulator, then drilling and releasing pressure, monitoring the stress field change in the pressure releasing process in real time, comparing and analyzing the roadway surrounding rock stress change before and after the pressure releasing and drilling, and analyzing the pressure releasing effect.
For example, in the method for evaluating the effect of the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided by one embodiment, the stress test hole is 130mm in diameter, a hole is formed at a position 100-200mm below the waist line of the roadway side part, and the hole depth of the near-horizontal hole is 20m and inclined at-2 degrees; the optical fiber is connected through a gas extraction pipe with the outer diameter of 32mm, and the fiber grating demodulator is externally connected with a power supply.
For example, in the method for evaluating the effect of the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, in the step S3, pressure relief drilling holes are drilled in the top plate, the bottom plate, the side walls and the waist of the roadway respectively perpendicular to the direction of the maximum main stress, and a plurality of pressure relief drilling holes with different drilling angles are drilled in the same position so that the formed pressure relief drilling groups are distributed in a fan shape.
The deep high-ground-stress roadway surrounding rock drilling pressure relief structure and the effect evaluation method thereof have the beneficial effects that: the method is beneficial to improving the stability of surrounding rock, reducing the stress intensity ratio, improving the stability control effect of the surrounding rock, reducing the repair rate of the roadway, improving the generation efficiency, providing theoretical basis for the stability control and the safe generation of the surrounding rock of the deep roadway under similar conditions, and having wide engineering application prospect; according to the method, the stress monitoring system and the displacement monitoring system are arranged, the pressure relief effect can be monitored in real time, the pressure relief effect is evaluated from the angles of stress and deformation, the rapid pressure relief of the high-ground stress roadway surrounding rock can be realized, the stress and displacement evolution characteristics of the surrounding rock under the action of drilling pressure relief are accurately monitored, compared with a traditional roadway drilling pressure relief method, the field drilling workload can be greatly reduced, the pressure relief effect and efficiency of the roadway surrounding rock can be increased while the cost is reduced, and the pressure relief effect can be completely evaluated in real time through a comprehensive monitoring means, so that technical support is provided for the safety production of coal mine enterprises.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, 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 top view of a deep high ground stress roadway surrounding rock drilling pressure relief structure of the present application;
FIG. 2 is a horizontal view of a deep high ground stress roadway surrounding rock drilling pressure relief structure of the present application;
FIG. 3 is a schematic diagram of a pressure relief hole site of a deep high ground stress roadway surrounding rock drilling pressure relief structure;
fig. 4 is a cross-sectional view of a deep high ground stress roadway surrounding rock drilling pressure relief structure of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The first aspect of the present application provides a deep high-ground stress roadway surrounding rock drilling pressure relief structure, as shown in fig. 1-4, including a pressure relief drilling group 100, a stress monitoring system 200 and a displacement monitoring system, wherein a plurality of groups of pressure relief drilling groups 100 are arranged at surrounding rock intervals at different positions of a roadway 300, and each group of pressure relief drilling groups 100 is located in a range from shoulder sockets to side angles at two sides of the roadway 300 and distributed in a fan shape; the stress monitoring system 200 is pre-embedded at one side of the roadway 300 to monitor the stress change of surrounding rock of the roadway before and after the pressure relief drilling is drilled; the displacement monitoring system is arranged on the surface of the surrounding rock of the roadway to monitor the displacement evolution characteristics of the surrounding rock of the roadway under the action of pressure relief drilling.
The deep high-ground stress roadway surrounding rock drilling pressure relief structure belongs to intra-roadway pressure relief, has the advantages of small engineering quantity, convenience in construction, higher construction speed, no influence on the construction period and the like, can provide effective compensation space for surrounding rock expansion deformation while transferring the peripheral high stress of the roadway, can absorb energy generated by partial deformation, and has good application prospect in deep roadway pressure management engineering.
According to the method, the stress monitoring system and the displacement monitoring system are arranged, the pressure relief effect can be monitored in real time, the pressure relief effect is evaluated from the angles of stress and deformation, the rapid pressure relief of the high-ground stress roadway surrounding rock can be realized, the stress and displacement evolution characteristics of the surrounding rock under the action of drilling pressure relief are accurately monitored, compared with a traditional roadway drilling pressure relief method, the field drilling workload can be greatly reduced, the pressure relief effect and efficiency of the roadway surrounding rock can be increased while the cost is reduced, and the pressure relief effect can be completely evaluated in real time through a comprehensive monitoring means, so that technical support is provided for the safety production of coal mine enterprises.
For example, in the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, as shown in fig. 4, the stress monitoring system 200 includes a stress test hole 210, a stress sensor 220 and a fiber bragg grating demodulator, where the stress test hole 210 is disposed in a pressure relief area at one side of the roadway 300 and penetrates through the roadway surrounding rock; the stress sensors 220 are respectively arranged at different depths of the stress test hole 210 so as to continuously monitor the stress field change of the roadway surrounding rock in the pressure relief process; the fiber bragg grating demodulator is in data connection with the stress sensor 220.
Specifically, one stress sensor 220 is embedded in each of the stress test holes 210 with the hole depths of 20m, 15m and 8m, wherein the stress sensor 220 is a spherical three-way stress sensor.
For example, in the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, the displacement monitoring system comprises displacement meters arranged on the surface of the roadway surrounding rock, in the roadway and in the pressure relief drilling, feedback information is analyzed in time through the displacement monitoring system, and stability of the roadway surrounding rock is judged.
For example, in the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, a peeping instrument is arranged in the pressure relief drilling hole, and the convergence condition of the pressure relief drilling hole is monitored in real time.
For example, in the deep high-ground-stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, as shown in fig. 1-4, the distance between two adjacent pressure relief drilling groups 100 is 20m, the single hole diameter of the pressure relief drilling group 100 is 130mm, and the single hole length is 4-5 times of the roadway width.
For example, in the deep high ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, the control of the drilling pressure relief timing, that is, the control of the coordination degree of the pressure relief support, is as follows: the roadway 300 can be drilled and relieved after being excavated, namely the pressure relief drilling is constructed along with a tunneling working face, gangue and water are discharged from the tunneling working face as soon as possible after the primary yielding support is completed, then surrounding rocks at different positions of the test roadway are drilled and relieved according to designed pressure relief drilling parameters, and the designed drilling parameters comprise pressure relief azimuth, pressure relief opportunity, drilling length, diameter, interval row distance and the like.
As shown in fig. 1-4, each of the pressure relief borehole groups 100 is arranged in four rows ranging from shoulder sockets to upper corners on both sides of the roadway and is arranged in a fan shape.
The second aspect of the application provides an effect evaluation method of a deep high-ground stress roadway surrounding rock drilling pressure relief structure, which comprises the following steps in order of construction time:
s1, installing a stress monitoring system;
s2, installing a displacement monitoring system;
s3, drilling and pressure relief are carried out on surrounding rocks at different positions of the roadway, specifically, drilling positions and drilling parameters are determined according to geology and mining conditions, and then drilling and pressure relief are carried out directionally according to a set fan-shaped drilling and pressure relief scheme;
and S4, monitoring the stress change of surrounding rocks of the roadway before and after the pressure relief of the drilling hole through a stress monitoring system, monitoring the displacement evolution characteristics of the surrounding rocks of the roadway under the action of the pressure relief drilling hole through a displacement monitoring system, and evaluating the pressure relief effect.
For example, in the method for evaluating the effect of the deep high ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, the installing stress monitoring system in S1 includes the following steps:
firstly, drilling a stress test hole 210 on one side of a roadway 300, flushing through holes after drilling is completed, and discharging rock slag;
secondly, embedding stress sensors 220 in different depths of the stress test holes 210, and connecting the stress sensors with a fiber bragg grating demodulator through optical fibers;
thirdly, grouting cement slurry with the cement slurry water-cement ratio of 1:1 to fill the stress test hole 210;
fourth, after the slurry is solidified, the stress data acquired by the corresponding force sensor 220 is tracked and observed by adopting a fiber bragg grating demodulator, then the drilling and pressure relief are carried out, the stress field change in the pressure relief process is monitored in real time, the roadway surrounding rock stress change before and after the pressure relief drilling is compared and analyzed, and the pressure relief effect is analyzed.
For example, in the method for evaluating the effect of the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided by one embodiment, the stress test hole 210 has a diameter of 130mm, is drilled at a position 100-200mm below the waist line of the roadway side part, and is inclined at a depth of 20m and minus 2 degrees near the horizontal hole; the optical fibers are connected through a gas extraction pipe with the outer diameter of 32mm, the stress sensor 220 is pushed to the hole bottom through the gas extraction pipe, one stress test hole 210 is respectively buried at the hole depths of 20m, 15m and 8m, specifically, the stress sensor 220 is a spherical three-way stress sensor, the fiber bragg grating demodulator is externally connected with a mining intrinsic safety type direct current power supply (voltage 12V, current 1A or more), and the power supply needs to continuously supply power for 3 months.
For example, in the method for evaluating the effect of the deep high-ground stress roadway surrounding rock drilling pressure relief structure provided in one embodiment, in S3, pressure relief drilling holes 110 are drilled in the top plate, the bottom plate, the side walls and the waist of the roadway 300 perpendicular to the direction of maximum main stress, and a plurality of pressure relief drilling holes 110 with different drilling angles are drilled at the same position, so that the formed pressure relief drilling hole groups 100 are distributed in a fan shape.
Specifically, as shown in fig. 1-3, pressure relief drilling holes 110 are drilled on the top plate, the bottom plate, the side walls and the waist of the roadway 300 respectively perpendicular to the direction of maximum principal stress, and 4 hole cores are drilled at the same position by respectively adjusting a certain angle, so that the pressure relief drilling holes 110 at the same position are staggered; the pressure relief bores 110 have a diameter of 130mm and a single bore length of 25m, each group of pressure relief bores 100 comprises 32 pressure relief bores 110, a total of 3 groups of 96 pressure relief bores 110, and the spacing between groups of pressure relief bores 100 is 20m. Each group of pressure relief drilling groups 100 is arranged in 4 rows ranging from shoulder sockets to upper angles at two sides of the roadway, and is arranged in a fan shape at a certain angle. The specific position and construction angle of the pressure relief drilling 110 are shown in fig. 1-3, the anchor rods and anchor cables need to be avoided in the drilling construction process, the shielding objects such as water pipes, air cylinders and the like are avoided on site according to the actual construction conditions, and the hole positions of the pressure relief drilling 110 can be properly adjusted.
According to the embodiment, the plastic pressure relief areas can be formed among the pressure relief drilling holes, the overall and local pressure relief effect can be obviously improved, the operation is simple, the construction is convenient, the influence of the pressure relief range is large, and the pressure relief effect is good for the position with larger deformation.
According to the deep high-ground-stress roadway surrounding rock drilling pressure relief structure and the effect evaluation method thereof, a perfect evaluation system of the effect after pressure relief is constructed, theoretical basis is provided for deep roadway surrounding rock stable control and safe generation under similar conditions, and the deep high-ground-stress roadway surrounding rock drilling pressure relief structure has wide engineering application prospect, and is novel and reasonable in design, convenient to install, small in operation difficulty, small in engineering quantity, high in data accuracy, strong in practicality, good in use effect and convenient to popularize and use.
Although embodiments of the present application have been disclosed above, it is not limited to the details and embodiments shown, it is well suited to various fields of use for the application, and further modifications may be readily made by those skilled in the art without departing from the general concepts defined by the claims and the equivalents thereof, and the application is therefore not limited to the specific details and illustrations shown and described herein.
Claims (10)
1. A drilling pressure relief structure for surrounding rock of a deep high-ground-stress roadway is characterized by comprising,
the surrounding rocks at different positions of the roadway are provided with a plurality of groups of pressure relief drilling groups at intervals, and each group of pressure relief drilling groups is positioned in the range from shoulder pits to side angles at two sides of the roadway and distributed in a fan shape;
the stress monitoring system is pre-buried at one side of the roadway to monitor the stress change of surrounding rocks of the roadway before and after the pressure relief drilling is drilled;
the displacement monitoring system is arranged on the surface of the surrounding rock of the roadway to monitor the displacement evolution characteristics of the surrounding rock of the roadway under the action of pressure relief drilling.
2. The deep high ground stress roadway surrounding rock drilling pressure relief structure of claim 1, wherein the stress monitoring system comprises:
the stress test hole is arranged in the pressure relief area at one side of the roadway and penetrates through surrounding rock of the roadway;
stress sensors are respectively arranged at different depths of the holes in the stress test hole so as to continuously monitor the stress field change of the roadway surrounding rock in the pressure relief process;
and the fiber bragg grating demodulator is in data connection with the stress sensor.
3. The deep high ground stress roadway surrounding rock drilling pressure relief structure of claim 1, wherein the displacement monitoring system comprises displacement meters arranged on the surface of the roadway surrounding rock, in the roadway and in the pressure relief drilling.
4. The deep high-ground-stress roadway surrounding rock drilling pressure relief structure according to claim 1, wherein a peeping instrument is arranged in the pressure relief drilling hole, and the convergence condition of the pressure relief drilling hole is monitored in real time.
5. The deep high ground stress roadway surrounding rock drilling pressure relief structure of claim 1, wherein the distance between two adjacent pressure relief drilling groups is 20m, the single hole diameter of each pressure relief drilling group is 130mm, and the single hole length is 4-5 times of the roadway width.
6. The deep high-ground-stress roadway surrounding rock drilling pressure relief structure according to claim 1, wherein drilling pressure relief is carried out after the roadway is excavated, and each group of pressure relief drilling groups is arranged in four rows in a range from shoulder pits to side angles at two sides of the roadway and is arranged in a fan shape.
7. The effect evaluation method of the deep high ground stress roadway surrounding rock drilling pressure relief structure according to any one of claims 1 to 6, comprising the following steps:
s1, installing a stress monitoring system;
s2, installing a displacement monitoring system;
s3, drilling and pressure relief are carried out on surrounding rocks at different positions of the roadway;
and S4, monitoring the stress change of surrounding rocks of the roadway before and after the pressure relief of the drilling hole through a stress monitoring system, monitoring the displacement evolution characteristics of the surrounding rocks of the roadway under the action of the pressure relief drilling hole through a displacement monitoring system, and evaluating the pressure relief effect.
8. The construction method of the deep high ground stress roadway surrounding rock drilling pressure relief structure according to claim 7, wherein the step of installing the stress monitoring system in S1 comprises the following steps:
firstly, drilling a stress test hole on one side of a roadway, flushing through holes after drilling is completed, and discharging rock slag;
secondly, burying stress sensors in different depths of the stress test holes, and connecting the stress sensors with a fiber bragg grating demodulator through optical fibers;
thirdly, cement slurry is filled into the stress testing holes for compaction;
and fourthly, after the slurry is solidified, tracking and observing stress data acquired by a corresponding force sensor by adopting a fiber bragg grating demodulator, then drilling and releasing pressure, monitoring the stress field change in the pressure releasing process in real time, comparing and analyzing the roadway surrounding rock stress change before and after the pressure releasing and drilling, and analyzing the pressure releasing effect.
9. The construction method of the deep high-ground stress roadway surrounding rock drilling pressure relief structure, according to claim 8, wherein the diameter of the stress test hole is 130mm, a hole is formed at a position 100-200mm below the waist line of the roadway side part, and the hole depth of the near-horizontal hole is 20m and inclined at-2 degrees; the optical fiber is connected through a gas extraction pipe with the outer diameter of 32mm, and the fiber grating demodulator is externally connected with a power supply.
10. The construction method of the deep high-ground stress roadway surrounding rock drilling pressure relief structure according to claim 7, wherein in the step S3, pressure relief drilling holes are drilled in the top plate, the bottom plate, the side walls and the waist of the roadway respectively perpendicular to the direction of maximum main stress, and a plurality of pressure relief drilling holes with different drilling angles are drilled at the same position so that the formed pressure relief drilling holes are distributed in a fan shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310435575.5A CN116291186A (en) | 2023-04-21 | 2023-04-21 | Deep high-ground-stress roadway surrounding rock drilling pressure relief structure and effect evaluation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310435575.5A CN116291186A (en) | 2023-04-21 | 2023-04-21 | Deep high-ground-stress roadway surrounding rock drilling pressure relief structure and effect evaluation method thereof |
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| CN116291186A true CN116291186A (en) | 2023-06-23 |
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| CN202310435575.5A Pending CN116291186A (en) | 2023-04-21 | 2023-04-21 | Deep high-ground-stress roadway surrounding rock drilling pressure relief structure and effect evaluation method thereof |
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| CN116933588A (en) * | 2023-07-18 | 2023-10-24 | 安徽建筑大学 | Drilling pressure relief parameter analysis method for deep roadway with different lithology |
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