CN109307534A - A kind of prearranged pillar STABILITY MONITORING device and construction method - Google Patents
A kind of prearranged pillar STABILITY MONITORING device and construction method Download PDFInfo
- Publication number
- CN109307534A CN109307534A CN201811505074.5A CN201811505074A CN109307534A CN 109307534 A CN109307534 A CN 109307534A CN 201811505074 A CN201811505074 A CN 201811505074A CN 109307534 A CN109307534 A CN 109307534A
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- pvc pipe
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- prearranged pillar
- point displacement
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 38
- 238000012544 monitoring process Methods 0.000 claims abstract description 30
- 239000003245 coal Substances 0.000 claims abstract description 28
- 239000003822 epoxy resin Substances 0.000 claims abstract description 17
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 17
- 239000012528 membrane Substances 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims description 31
- 238000007569 slipcasting Methods 0.000 claims description 10
- 238000005065 mining Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000003306 harvesting Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004164 analytical calibration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The present invention provides a kind of prearranged pillar STABILITY MONITORING device and construction method, device includes pvc pipe, multi-point displacement sensor, pressure sensor, signal projector, signal receiver, digital treating meter, power supply, conducting wire etc..It is filled inside pvc pipe by epoxy resin filler, sensor is connected with conducting wire, and sensor is distributed in pvc pipe, and waterproof membrane is covered on pvc pipe outer surface, and sensor is transferred to signal receiver by signal projector, and signal receiver connects digital treating meter.The present invention designs economy, and structure is simple, easy for installation, does not contact directly with coal column, can be according to different coal column environment adjustment lengths；The dynamic stress variation of prearranged pillar monitoring section each position is embodied comprehensively, monitoring device can be in a certain range by compressive deformation, the risk for causing monitoring device to damage because of prearranged pillar movement and deformation is greatly reduced, reduce stress measurement error, each sensor parallel connection, mutually without influence, monitoring data are stablized accurate.
Description
Technical field
The present invention relates to prearranged pillar STABILITY MONITORING technical fields, and in particular to a kind of prearranged pillar STABILITY MONITORING dress
It sets and construction method.
Background technique
With the development of urban construction and the raising of coal demand, under China's building, " three under water body, under railway
Under " press coal reserves proportion increasing.Exploitation mining area prearranged pillar is that stable development is maintained in most of mining areas at this stage
One of measure.In mining engineering practice, on the one hand, it is required that bearing block long term effectively supports overlying rock, but in Adjacent Working Face
After pushing to adopt, over time, due to the influence of theomorphism, stability of coal pillar can be with the time of overlying rock effect
Extend and reduces；On the other hand, coal recovery rate is improved in order to reduce the wasting of resources, needs to make full use of the bearing of prearranged pillar
Ability stays the coal column set when " under three " exploitation before exploiting, at the same time, with deep increase is adopted, stays the coal column set that can also get over
Come bigger, change in displacement, unexpected release in exploitation engineering cause unpredictable threat to lives and properties.
Summary of the invention
The object of the present invention is to provide a kind of prearranged pillar STABILITY MONITORING device and its construction methods, conventional pre- to overcome
The deficiency in coal column monitoring is stayed, reflects the dynamic stress variation of prearranged pillar different location in time, to guarantee to exploit safety.
The technical scheme is that a kind of prearranged pillar STABILITY MONITORING device, including pvc pipe, edge in the pvc pipe
Its pipe range direction is laid with multiple multi-point displacement sensors and multiple pressure sensors, the multi-point displacement sensor and pressure
Force snesor passes through conducting wire respectively and connect with signal projector signal, and the multi-point displacement sensor, pressure sensor and
Signal projector also passes through conducting wire and is electrically connected with power module；The signal projector and signal receiver wireless communication connect,
Signal receiver is connect with digital treating meter；The signal projector, conducting wire and power module are set in the pvc pipe,
And sold stowing is carried out by epoxy resin obturation inside the pvc pipe.
The quantity of above-mentioned multi-point displacement sensor and pressure sensor is equal, and by multi-point displacement sensor and pressure sensing
Device is divided into multiple groups, and every group includes a multi-point displacement sensor and a pressure sensor, the multi-point displacement sensing in every group
The center line of device and pressure sensor in pvc pipe using pvc pipe is symmetrical as symmetry axis.
The quantity of above-mentioned multi-point displacement sensor and pressure sensor is 3, and multi-point displacement sensor and pressure pass
Sensor is divided into 3 groups, and each group is equidistant to be evenly distributed on inside the pvc pipe.
One end that closely knit pvc pipe is filled by epoxy resin obturation is equipped with tenon, and the other end is equipped with fourth of the twelve Earthly Branches slot, passes through both ends
Set joinery and its construction makes when needing to extend, and can fill closely knit pvc pipe successively by epoxy resin obturation for multiple
It links together.
The outer surface of above-mentioned pvc pipe is equipped with waterproof membrane.
A kind of construction method of prearranged pillar STABILITY MONITORING device, includes the following steps:
(1) start drilling apart from coal mining open-off cut 100m, gradient is arranged in the horizontal direction for drilling, makes a call to one every 10m
Drilling；In vertical direction using coal thickness 5m as boundary, more than 5m, with 3m for a gradient vertical drilling, not above 5m not drilling；
(2) prearranged pillar STABILITY MONITORING device is placed in drilling, digital treating meter is calibrated, and signal connects
Signal projector, signal receiver and digital treating meter test the prearranged pillar STABILITY MONITORING device signal transmission
Stability；
(3) after the stability of prearranged pillar STABILITY MONITORING device transmission reaches requirement, slip casting coupling, makes in drilling
Slip casting Seed harvest is formed between pvc pipe and drill hole inner wall；
(4) misalignment and pressure situation of the monitoring coal column before exploitation, records institute's monitoring data, until reaching
The opposite stabilization sub stage.
Beneficial effects of the present invention: the present invention provides a kind of prearranged pillar STABILITY MONITORING device and construction method, energy
The deformation of prearranged pillar is constantly enough adapted to using filled PVC pipe to keep itself availability of pvc pipe, while being become in prearranged pillar
Real-time monitoring prearranged pillar Stress Field Distribution situation during shape reflects prearranged pillar stability in time.And design is economical,
Structure is simple, can embody the dynamic stress variation of coal column monitoring section each position comprehensively, the pvc pipe after filling can be in a certain range
Compressive deformation substantially reduces the risk for causing monitoring device to damage because of coal column deformation, reduces stress measurement error.
Detailed description of the invention
Fig. 1 is prearranged pillar STABILITY MONITORING apparatus structure schematic diagram of the invention；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the pvc pipe connection schematic diagram of Fig. 1；
Fig. 4 is the monitoring installation flow chart of prearranged pillar STABILITY MONITORING device of the invention.
Specific embodiment
With reference to the accompanying drawing, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection scope be not limited by the specific implementation.
The present invention provides a kind of prearranged pillar STABILITY MONITORING device and construction method, prearranged pillar STABILITY MONITORINGs
Device includes pvc pipe 1, is laid with multiple multi-point displacement sensors 3 and multiple pressure along its pipe range direction in the pvc pipe 1
Sensor 2, the multi-point displacement sensor 3 and pressure sensor 2 are connect by conducting wire 5 with 7 signal of signal projector respectively,
And the multi-point displacement sensor 3, pressure sensor 2 and signal projector 7 are also electrically connected by conducting wire 5 with power module 12
It connects, the signal projector 7 is connected with the wireless communication of signal receiver 6, and signal receiver 6 is connect with digital treating meter 11；Its
Middle signal projector includes first microprocessor and signal emission module, and the first microprocessor is connected separately pressure biography
Sensor 2 and signal emission module；Signal receiver 6 includes the second microprocessor and signal receiving module, the second microprocessor
It is connect with signal receiving module signal, signal receiving module and signal emission module wireless communication connect, and the second microprocessor is also
It is connect with 11 signal of digital treating meter；The signal projector 7, conducting wire 5 and power module 12 are set in the pvc pipe 1,
And sold stowing is carried out by epoxy resin obturation 8 inside the pvc pipe 1.
Further, multi-point displacement sensor 3 is equal with the quantity of pressure sensor 2, and by 3 He of multi-point displacement sensor
Pressure sensor 2 divides for multiple groups, and every group includes a multi-point displacement sensor 3 and a pressure sensor 2, more in every group
Point displacement sensor 3 and pressure sensor 2 are symmetrical as symmetry axis using the center line of pvc pipe 1 in pvc pipe 1.
Further, the quantity of multi-point displacement sensor 3 and pressure sensor 2 is 3, and multi-point displacement sensor 3
Dividing with pressure sensor 2 is 3 groups, and each group is equidistant to be evenly distributed on inside the pvc pipe 1.
Further, one end that closely knit pvc pipe 1 is filled by epoxy resin obturation 8 is equipped with tenon, and the other end is equipped with the fourth of the twelve Earthly Branches
Slot is made by joinery and its construction set by both ends when needing to extend, can by it is multiple filled by epoxy resin obturation 8 it is closely knit
Pvc pipe 1 be connected in turn.
Further, the outer surface of the pvc pipe 1 is equipped with waterproof membrane 4.
Further, the epoxy resin obturation 8 can also using rubber, plastic cement or it is other have elastoplasticity material come
Instead of.
The construction method of prearranged pillar STABILITY MONITORING device of the invention, includes the following steps:
1) start drilling 9 apart from coal mining open-off cut 100m, gradient is arranged in the horizontal direction for drilling 9, makes a call to one every 10m
Drilling；In vertical direction using coal thickness 5m as boundary, more than 5m, with 3m for a gradient vertical drilling 9, not above 5m not drilling
9；
2) prearranged pillar STABILITY MONITORING device is placed in drilling 9, digital treating meter 11 is calibrated, and signal connects
Signal projector 7, signal receiver 6 and digital treating meter 11 are connect, the prearranged pillar STABILITY MONITORING device signal is tested
The stability of transmission；
3) after the stability of prearranged pillar STABILITY MONITORING device transmission reaches requirement, slip casting coupling, makes in drilling 9
Slip casting Seed harvest 10 is formed between 9 inner walls of pvc pipe 1 and drilling；
4) misalignment and pressure situation of the monitoring coal column before exploitation, records institute's monitoring data, until reaching
The opposite stabilization sub stage；
5) normal monitoring is carried out.
In conclusion prearranged pillar STABILITY MONITORING device provided by the invention and construction method, monitoring device include
Pvc pipe, multi-point displacement sensor, pressure sensor, signal projector, signal receiver, waterproof membrane, conducting wire and data processing
Instrument, multiple pvc pipes alternately connect, and are filled in pipe by epoxy resin filler, form closely knit tight in managing, signal projector
It is wirelessly connected with signal receiver, multi-point displacement sensor, pressure sensor, signal receiver and power supply connect with conducting wire respectively
It connects, is placed in tubular body, waterproof membrane is covered on pvc pipe outer surface.Wherein, connected between pvc pipe by mortise-tenon joint or nesting
It connects, under the premise of guaranteeing its due working strength and integraty, can be required to select suitable connection side according to Practical Project
Formula, the length of single pvc pipe are less than the length of institute's drilling.Multi-point displacement sensor, pressure sensor, signal projector and electricity
Source is mounted on inside pvc pipe and is surrounded by epoxy resin filler, lays three groups of multi-point displacement sensors in each pvc pipe
And pressure sensor.Epoxy resin filler be rubber, plastic cement or it is other have elastoplasticity material, in use, in pvc pipe
Dense packing effect is damaged during installing and using to prevent locking apparatus.
Alarm Assessment method of the invention is as follows:
Alert Standard is determined according to the Practical Projects parameter such as displacement, crustal stress states, excavation and supporting, according to practical reserved
Coal column stability state, using the different location that pvc pipe inner sensor is installed as independent variable, corresponding measured stress value and displacement
As dependent variable, safety line, early warning critical line, danger early warning line are determined, and in this, as the evaluation criterion of coal column stable state,
Evaluation and early warning are carried out to prearranged pillar stability.
Due to specifically monitoring each mechanics and engineering parameter difference of rock mass, does not do detailed data area herein and limit, have
Depending on body parameter is with Practical Project.
The important technological parameters of monitoring device of the present invention are as follows:, need to be in prearranged pillar before monitoring according to field engineering needs
Upper selected suitable position drilling, it is identical to bore each hole depth and diameter, aperture 50~100mm big compared with pvc pipe diameter, pitch-row for 10~
15m, depending on pvc pipe sensor group number is required with Practical Project, sensor is installed as shown in Fig. 2, sensor is mounted in pvc pipe
And in parallel installation, each pvc pipe is interior to lay three groups of multi-point displacement sensors and pressure sensor, pvc pipe as shown in Figure 3
Interior obturation uses epoxy resin material.Assembled device is fitted into drilling according to (Fig. 1) mode, for guarantee pvc pipe and
Effective stress transmitting between hole wall coal body, is coupled using grouting mode in hole.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, which includes: pvc pipe, multi-point displacement sensor, pressure sensing
Device, waterproof membrane, conducting wire, signal receiver, signal projector, epoxy resin sold stowing body, drilling, slip casting Seed harvest, data
Processing instrument, power supply.1 inner hollow of pvc pipe, filling epoxy resin fill body 8 fill pvc pipe and form the closely knit chamber of tubular body, lead
Line 5 connects pressure sensor 3, multi-point displacement sensor 2, signal projector 7 and power supply 12, and signal projector 7 and signal receive
Device 6 is wirelessly connected, and sensor 2,3 is mounted on inside pvc pipe 1, and waterproof membrane 4 is most external structure, is overlying on outside entire pvc pipe 1.
Wherein, it is connected between two sections of pvc pipes 1 by joinery and its construction.
Using process shown in Fig. 4, in an actual embodiment, prearranged pillar monitoring surface, and selected prearranged pillar monitoring are selected
Point and monitoring spacing；It is oriented drilling and prearranged pillar STABILITY MONITORING device is installed, carry out slip casting coupling in hole；Each drilling
The stress state of monitoring point, which is changed over time, carries out visualization output by data sink；It determines in prearranged pillar monitoring holes and moves
State stress envelope.
Specific construction process is as follows:
(1) 7 positions of monitoring drilling are determined；
(2) it drills to projected depth；
(3) device is placed in specified position in hole；
(4) slip casting coupling in drilling 7, forms slip casting Seed harvest 10 outside pvc pipe；
(5) connection signal transmitter test sensor 2,3 working conditions and instrument calibration；
(6) normal monitoring is carried out.
Prearranged pillar STABILITY MONITORING device provided by the invention and construction method, can be constantly suitable using filled PVC pipe
The deformation of prearranged pillar is answered to keep itself availability of pvc pipe, while real-time monitoring is reserved in prearranged pillar deformation process
Stress of coal pillar field distribution situation reflects prearranged pillar stability in time.And design is economical, and structure is simple, and it is easy for installation, no
It is directly contacted with coal column, can embody comprehensively the dynamic of coal column monitoring section each position according to different coal column environment adjustment lengths
Stress variation, the pvc pipe after filling can substantially reduce in a certain range compressive deformation and cause monitoring device to damage because of coal column deformation
Bad risk reduces stress measurement error, and each sensor parallel connection, mutually without influence, monitoring data are stablized accurate.
Hole location is selected in above-described embodiment, drilling parameter, sensor group quantity, material select and arrangement form is according to specific
Depending on the conditions such as geological conditions, stress state, excavation and supporting requirement, the present invention is not particularly limited.It is disclosed above to be only
Several specific embodiments of the invention, still, the embodiment of the present invention is not limited to this, and any those skilled in the art can think
Variation should all fall into protection scope of the present invention.
Claims (6)
1. a kind of prearranged pillar STABILITY MONITORING device, which is characterized in that including pvc pipe (1), along its pipe in the pvc pipe (1)
Length direction is laid with multiple multi-point displacement sensors (3) and multiple pressure sensors (2), the multi-point displacement sensor (3)
And pressure sensor (2) is connect by conducting wire (5) with signal projector (7) signal respectively, and the multi-point displacement sensor
(3), pressure sensor (2) and signal projector (7) are also electrically connected by conducting wire (5) with power module (12)；The signal
Transmitter (7) and signal receiver (6) wireless communication connect, and signal receiver (6) is connect with digital treating meter (11)；The letter
Number transmitter (7), conducting wire (5) and power module (12) are set in the pvc pipe (1), and the internal quilt of the pvc pipe (1)
Epoxy resin obturation (8) carries out sold stowing.
2. a kind of prearranged pillar STABILITY MONITORING device as described in claim 1, which is characterized in that multi-point displacement sensor
(3) and the quantity of pressure sensor (2) is equal, and multi-point displacement sensor (3) and pressure sensor (2) are divided into multiple groups, often
Group includes a multi-point displacement sensor (3) and a pressure sensor (2), multi-point displacement sensor (3) in every group and
Pressure sensor (2) is symmetrical as symmetry axis using the center line of pvc pipe (1) in pvc pipe (1).
3. a kind of prearranged pillar STABILITY MONITORING device as described in claim 1, which is characterized in that multi-point displacement sensor
(3) and the quantity of pressure sensor (2) is 3, and multi-point displacement sensor (3) and pressure sensor (2) are divided into 3 groups, respectively
Group is equidistant to be evenly distributed on the pvc pipe (1) inside.
4. a kind of prearranged pillar STABILITY MONITORING device as described in claim 1, which is characterized in that by epoxy resin obturation
(8) one end for filling closely knit pvc pipe (1) is equipped with tenon, and the other end is equipped with fourth of the twelve Earthly Branches slot, is made by joinery and its construction set by both ends
When needing to extend, multiple pvc pipes (1) closely knit by epoxy resin obturation (8) filling can be connected in turn.
5. a kind of prearranged pillar STABILITY MONITORING device as described in claim 1, which is characterized in that outside the pvc pipe (1)
Surface is equipped with waterproof membrane (4).
6. a kind of construction method of prearranged pillar STABILITY MONITORING device, which comprises the steps of:
(1) start drilling (9) apart from coal mining open-off cut 100m, gradient is arranged in the horizontal direction for drilling (9), makes a call to one every 10m
A drilling；In vertical direction using coal thickness 5m as boundary, do not beaten with 3m for a gradient vertical drilling (9) not above 5m more than 5m
It drills (9)；
(2) prearranged pillar STABILITY MONITORING device is placed in drilling (9), digital treating meter (11) is calibrated, and signal
Connection signal transmitter (7), signal receiver (6) and digital treating meter (11), test the prearranged pillar STABILITY MONITORING
The stability of device signal transmission；
(3) after the stability of prearranged pillar STABILITY MONITORING device transmission reaches requirement, in the interior slip casting coupling of drilling (9), make
Slip casting Seed harvest (10) are formed between pvc pipe (1) and drilling (9) inner wall；
(4) misalignment and pressure situation of the monitoring coal column before exploitation, records institute's monitoring data, until reaching opposite
Stabilization sub stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505074.5A CN109307534A (en) | 2018-12-10 | 2018-12-10 | A kind of prearranged pillar STABILITY MONITORING device and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505074.5A CN109307534A (en) | 2018-12-10 | 2018-12-10 | A kind of prearranged pillar STABILITY MONITORING device and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN109307534A true CN109307534A (en) | 2019-02-05 |
Family
ID=65223335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811505074.5A Pending CN109307534A (en) | 2018-12-10 | 2018-12-10 | A kind of prearranged pillar STABILITY MONITORING device and construction method |
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| Country | Link |
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| CN (1) | CN109307534A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322940A (en) * | 2020-04-08 | 2020-06-23 | 北京交通大学 | Tunnel face deep soil horizontal displacement monitoring device and method |
| CN111678454A (en) * | 2020-06-24 | 2020-09-18 | 安徽理工大学 | Distributed monitoring system and method for coal pillar stability |
| CN113155200A (en) * | 2021-05-16 | 2021-07-23 | 天地科技股份有限公司 | Coal mine underground reservoir coal pillar dam body damage and damage determination device and method |
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| CN111678454A (en) * | 2020-06-24 | 2020-09-18 | 安徽理工大学 | Distributed monitoring system and method for coal pillar stability |
| CN113155200A (en) * | 2021-05-16 | 2021-07-23 | 天地科技股份有限公司 | Coal mine underground reservoir coal pillar dam body damage and damage determination device and method |
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