CN207019657U - Goaf roof and floor deformation and obturation stress monitoring integrated apparatus - Google Patents
Goaf roof and floor deformation and obturation stress monitoring integrated apparatus Download PDFInfo
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- CN207019657U CN207019657U CN201721016942.4U CN201721016942U CN207019657U CN 207019657 U CN207019657 U CN 207019657U CN 201721016942 U CN201721016942 U CN 201721016942U CN 207019657 U CN207019657 U CN 207019657U
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Abstract
The utility model discloses a kind of deformation of goaf roof and floor and obturation stress monitoring integrated apparatus, the stress monitoring instrument that it is filled body stress by the displacement monitor and monitoring of measuring staff and the monitoring roof and floor displacement being attached on measuring staff forms；Goaf top plate and the deformation data of roof and floor deep rock stratum are obtained by displacement monitor；Meanwhile two stress monitoring instruments by being additional to agent set collect obturation vertical stress and horizontal stress data；By these comprehensive monitoring data, reliable foundation is provided to be fully understood by stress and deformation relationship etc. between top plate and obturation interaction mechanism, top plate and obturation.
Description
Technical field
The utility model belongs to mining engineering monitoring technical field, more particularly, to being adopted under the solid filling mining conditions of colliery
Dead zone roof and floor sedimentation monitoring integrated with filling body stress.
Background technology
Coal seam, which is excavated, causes strata displacement boundary constraint to be released, while caused goaf surrouding rock stress is concentrated and will promoted
Extension, the changing of the relative positions and the insertion on top, bottom plate preexisting crack and structural plane, or even new microfissure is generated, so as to roof collapse, bottom
Plate is deformed, displacement and destruction.Goaf is one of the major casualty source in mine, the research to goaf stability by
The great attention in mine and the extensive concern of scholar.
In recent years, waste filling production technique is promoted in coal mining, waste filling body displacement coal body after into
For support overlying rock and stable direct subject is maintained, as roof and floor is extruded obturation, its bearing capacity, which plays, more fills
Point, when overburden pressure is larger and obturation can not resist, inside cracks and expanded, and starts to soften.To ensure to fill
Fill out the safe efficient progress of mining operations, it is necessary to which filling mining working face roof and floor settlement law and filling body stress are entered
Row research, it is that determination, the overburden deformation of solid filling design of material scheme rupture rule and Quality of filling body control effect
Grasp and effective, reliable foundation is provided, so as to reasonable arrangement cycle operation progress, and take effective supporting measure in time.
Application for a patent for invention publication number：The A of CN 1061223767 disclose that " a kind of coal wall filling mining top plate sinks
Monitoring method drops ", Authorization Notice No.：The B of CN 102589763 are disclosed " a kind of obturation performance on-line monitoring system ".The former
Disclosed monitoring method lays particular emphasis on the monitoring to roof and floor displacement, and roof and floor is not shifted near and crushed and carries out area
Point, and roof and floor deformation in goaf is uniformly classified as the amount of crushing, it have ignored the pucking amount in goaf.Prison disclosed in the latter
Survey method lays particular emphasis on the monitoring of obturation stress, and actually roof and floor displacement and obturation stress is interaction.Both enter
Row is observed respectively, caused by data can not effectively correspond to, be unfavorable for understanding obturation and roof and floor interaction mechanism.
The content of the invention
In order to study stress and deformation relationship between roof and floor and obturation, and avoid caused by both are monitored respectively
Data can not effectively corresponding to situation, the utility model proposes a kind of roof and floor that can monitor in the monitoring point of same position to become
Shape, while and can monitoring obturation answers power integrated device.
In order to achieve the above object, the utility model adopts the technical scheme that：
A kind of deformation of goaf roof and floor and obturation stress monitoring integrated apparatus, it is characterised in that by measuring staff and attached
The displacement monitor of the monitoring roof and floor displacement on measuring staff and the stress monitoring instrument composition of monitoring filling body stress；
Described displacement monitor is made up of the displacement transducer of three stay-supporteds, is installed in the fixed disk of the lower body of rod
On, the monitoring of roof deformation, roof to floor convergence and bottom deformation is respectively used to, successively by No. 1 sensor, No. 2 sensors, 3
Number sensor is monitored；
Described stress monitoring instrument has two sets, is respectively used to monitor obturation horizontal stress and vertical stress；
Described measuring staff is set with is formed successively by three the upper body of rod, middle part connecting rod and the lower body of rod hollow rods, the upper body of rod
It relative can be slided in the connecting rod of insertion middle part, certain height can be formed by regulation in the lower body of rod of middle part connecting rod insertion；Institute
State the middle part of the lower body of rod and bottom and be provided through the pore of body of rod both sides respectively；Strip top plate is provided with the top of the described upper body of rod
Fixed disk, the threading hole for being used for No. 1 sensor bracing wire and passing through communicated with measuring staff inner chamber is offered among top plate fixed disk, is passed through
Top plate fixed disk can be such that measuring staff upper end is fixed on top plate；Lower post is provided with bottom plate fixed disk, is opened among bottom plate fixed disk
It provided with the threading hole for being used for No. 3 sensor bracing wires communicated with measuring staff inner chamber, can fix measuring staff lower end by bottom plate fixed disk
On bottom plate；The bracing wire groove of No. 2 sensor bracing wires is offered on the external wall length direction of described upper boom, bracing wire groove lower end is provided with
Fix the binding post of No. 2 sensor bracing wire terminations and enter the threading hole of upper boom intracoelomic cavity；The body of rod of described middle part connecting rod
Top is provided with bracing wire guide.
Described stress monitoring instrument, by pressure capsule, cambered surface housing, liquid-pressure pick-up, liquid injection pipe and single-pass solenoid valve block
Into；Cambered surface housing is buckled in the pressure for being used to bear obturation on pressure capsule, and liquid-pressure pick-up is placed in the intracapsular portion of pressure, fluid pressure
Signal is sent to the controller of monitoring station and single-pass magnetic valve；Liquid injection pipe passes through the lower body of rod, and single-pass magnetic valve is placed in lower beam body
Chamber is simultaneously serially connected on liquid injection pipe, and liquid injection pipe one end connects with liquid-injection equipment, and the other end is with pressing intracapsular portion to connect；Wherein, it is horizontal to answer
Power monitor is attached at the middle part pore of the lower body of rod, the horizontal direction of the positive arc of cambered surface housing facing to obturation；Vertically should
Power monitor is attached at the bottom pore of the lower body of rod, and the positive arc of cambered surface housing is face-up；
The equidistant adjustment hole of two rows is symmetrically opened up on the body of rod of the middle part connecting rod of the measuring staff, on the body of rod of the lower body of rod
Screw corresponding with adjustment hole is machined with, screw makes measuring staff be fixed in certain height after installing bolt.
In order that cambered surface housing non-resistance is pressurized, the case top and housing surrounding of cambered surface housing are designed as being flexibly connected.
Illustrate method of the present utility model below.
Above-mentioned goaf roof and floor deformation and the application method of obturation stress monitoring integrated apparatus, it is characterised in that
Step is as follows：
The first step：The field condition monitored as needed, determine that roof and floor monitors drilling depth；Wherein Roof Monitor drills
Depth should be not less than caving zone height, and caving zone is highly calculated by existing caving zone calculation formula；Bottom plate monitoring drilling depth Hf
Calculated according to A.S.Vesic formula：
Wherein, xpTo move towards plastic zone scope along working face,For floor rock internal friction angle；
Second step：Drilled according to the top of calculating, bottom plate monitoring drilling depth, mounting arrangements the utility model after drilling
Integrated apparatus；
Three stay-supported type displacement sensors are arranged first, and No. 1 sensor bracing wire for monitoring roof deformation is anchored into top plate prison
Survey after foot of hole and introduce inner chamber from the threading hole of top plate fixed disk, draw and be connected on No. 1 sensor from the pore of the lower body of rod；
No. 3 sensor bracing wires of bottom deformation will be monitored, introduced after anchoring into bottom plate monitoring foot of hole from the threading hole of bottom plate fixed disk
Inner chamber, it is connected to by drawing wire conduit from the pore extraction of the lower body of rod on No. 3 sensors；The 2 of roof to floor convergence will be monitored
Number sensor bracing wire is connected on the binding post of bracing wire groove lower end, is risen along upper body of rod bracing wire groove, at the top of the connecting rod of middle part
After bracing wire guide is turned back, inner chamber is introduced from upper body of rod threading hole, then drawn by the pore of the lower body of rod and be connected to No. 2 sensors
On；
The upper body of rod of measuring staff is stretched out, measuring staff height is adjusted by middle part connecting rod, makes measuring staff both ends and top, base top
Tightly, and ensure top, bottom fixed disk and threading hole it is consistent with drilling, two stress monitoring instruments are in obturation side, and pass through
Top fixed disk and bottom plate fixed disk are fixed with top, bottom plate；
By the intracapsular fluid injection of the pressure of topping-up pump to two sets of stress monitoring instruments to predetermined value, single-pass magnetic valve is closed；To reduce
, it is necessary to bury stress monitoring instrument with filler, it is residing for horizontal stress monitor to bury height for influence during filling to device
Position；Mounting arrangements finish；
3rd step：Displacement transducer bracing wire is tightened up, stress monitoring instrument, displacement monitor signal wire are accessed by data wire
Monitoring station, it is monitored after to be filled；During working face filling mining, crush, bottom plate is heaved and obturation is applied
Pressure, will cause measuring staff to compress, is relatively moved between the upper body of rod and middle part connecting rod, make No. 1, No. 2 and No. 3 sensor bracing wire
Tensioning, displacement data signal is produced, while two sets of stress monitoring instruments produce horizontal stress and vertical stress data-signal respectively；On
Data signal transmission is stated to monitoring station；Wherein, the Monitoring Data of No. 2 sensors is roof to floor convergence, the monitoring of No. 2 sensors
The Monitoring Data that data subtract No. 3 sensors is the deflection that top plate directly pushes up, and the Monitoring Data of No. 1 sensor subtracts No. 3 biographies
The Monitoring Data of sensor is the deflection of top plate base object model, and the Monitoring Data of No. 3 sensors is the pucking amount of bottom plate.
The beneficial effects of the utility model are as follows：
(1) based on the agent set of three rod member compositions, goaf top plate and top bottom are obtained by displacement monitor
The deformation data of plate deep rock stratum；Deformation data includes deflection that roof to floor convergence, top plate directly push up, top plate base object model
The pucking amount of deflection and bottom plate；Obturation vertical stress and water are collected by two stress monitoring instruments for being additional to agent set
Horizontal stress data；
By these comprehensive monitoring data, to be fully understood by top plate and obturation interaction mechanism, top plate and obturation
Between stress and deformation relationship etc. provide reliable foundation；
(2) present apparatus simultaneously obturation vertical stress is monitored with horizontal stress, and stress monitoring point with it is mined out
Area's roof and floor deformation monitoring is in same point, has good correspondence；
(3) apparatus structure is simple, reliable, the roof and floor displacement being applicable under the conditions of different pack completeness and filling body stress
Monitoring, and avoid because obturation inhomogeneous deformation cause device tilt can not normal work situation.
Brief description of the drawings
Fig. 1 is the utility model embodiment overall structure diagram；
Fig. 2 is that the upper body of rod, middle part connect bar part right view in Fig. 1；
Fig. 3 is Tu1Zhong B areas enlarged drawing；
Fig. 4 is embodiment measuring staff bottom profile；
Fig. 5 is filling use state diagram.
In figure：The upper bodies of rod of 1-, 2- top plate fixed disks, 3- crab-bolts, the bracing wire of 4a-1 sensors, the drawing of 4b-2 sensors
Line, the bracing wire of 4c-3 sensors, 5- coal bodies, connecting rod in the middle part of 6-, 7- obturations, the body of rod under 8-, 9- bottom plate fixed disks, 10-
Displacement monitor, 11- bolts, 12- draw wire conduit, 13- adjustment holes, 14- horizontal stress monitors, the monitoring of 15- vertical stresses
Instrument, 16- bracing wire grooves, 17- grooves, 18- bracing wire guides, 19- binding posts, 20- pores, 21- cambered surface housings, 22- pressure capsules, 23-
Cambered surface housing, 24- liquid-pressure pick-ups, 25- single-pass magnetic valves, 26- liquid injection pipes, the drilling of 27- Roof Monitors, 28- bottom plates prison
Survey drilling.
Embodiment
The utility model embodiment is described in detail below in conjunction with the accompanying drawings：
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of goaf roof and floor deformation and obturation stress monitoring integrated apparatus,
By the level of the displacement monitor 10 and monitoring filling body stress of measuring staff and the monitoring roof and floor displacement being attached on measuring staff
Stress monitoring instrument 14 and vertical stress monitor 15 form.
Described measuring staff is set with is formed successively by 8 three the upper body of rod 1, middle part connecting rod 6 and the lower body of rod hollow rods, upper boom
It relative can be slided in the connecting rod 6 of the insertion of body 1 middle part, certain height can be formed by regulation in the lower body of rod 8 of the insertion of middle part connecting rod 6
Degree；Adjustment structure is, the body of rod of middle part connecting rod 6 symmetrically opens up the equidistant adjustment hole 13 of two rows, 8 on the body of rod of the lower body of rod 8
It is machined with and installs bolt 11 with 13 corresponding screw of adjustment hole, screw.
The middle part and bottom of the body of rod of the described lower body of rod 8 are provided through the pore 20 of body of rod both sides respectively.
Described displacement monitor 10 is made up of three stay-supported type displacement sensors, and the bottom plate installed in the lower body of rod 8 is fixed
On disk 9；Three stay-supported type displacement sensors are represented with No. 1, No. 2 and No. 3 sensor respectively, are respectively used to the prison of roof deformation
Survey, the monitoring of roof to floor convergence and the monitoring of bottom deformation.
Described stress monitoring instrument has two sets, including horizontal stress monitor 14 and vertical stress monitor 15, uses respectively
In monitoring obturation horizontal stress and vertical stress；Stress monitoring instrument is by pressure capsule 22, cambered surface housing 23, liquid-pressure pick-up
24th, liquid injection pipe 26 and single-pass magnetic valve 25 form；The case top and housing surrounding of cambered surface housing 23 are designed as being flexibly connected；Arc
Face-piece body 23 is buckled in the pressure for being used to bear obturation on pressure capsule 22, and liquid-pressure pick-up 24 is placed in inside pressure capsule 22, liquid
Pressure signal is sent to the controller of monitoring station and single-pass magnetic valve 25；Liquid injection pipe 26 passes through the lower body of rod 8, and single-pass magnetic valve 25 is put
In the lower inner chamber of the body of rod 8 and it is serially connected on liquid injection pipe 26, the one end of liquid injection pipe 26 connects with liquid-injection equipment, and the other end is with pressing inside capsule 22
Connection；Wherein, horizontal stress monitor 14 is attached at the middle part pore of the lower body of rod 8, the cambered surface shell of horizontal stress monitor 14
Horizontal direction of the positive arc of body facing to obturation；Vertical stress monitor 15 is attached at the bottom pore of the lower body of rod 8, vertically
The positive arc of the cambered surface housing of stress monitoring instrument 15 is face-up.
The described top of the upper body of rod 1 is provided with top plate fixed disk 2, offers among top plate fixed disk 2 and is communicated with measuring staff inner chamber
The bracing wire 4a for being used for No. 1 sensor threading hole, by top plate fixed disk 2 measuring staff upper end can be made to be fixed on top plate；Lower beam
The bottom of body 8 is provided with bottom plate fixed disk 9, and the drawing for being used for No. 3 sensors communicated with measuring staff inner chamber is offered among bottom plate fixed disk 9
Line 4c threading hole, by bottom plate fixed disk 9 measuring staff lower end can be made to be fixed on bottom plate.
The described upper body of rod 1 opens up the bracing wire groove 16 passed through for the bracing wire 4b of No. 2 sensors, the lower end of bracing wire groove 16 vertically
Provided with the binding post 19 for fixing No. 2 sensor bracing wire terminations and enter the threading hole of the upper inner chamber of the body of rod 1；Described middle part connecting rod
Groove 17 is provided with the top of 6 body of rod, bracing wire guide 18 is provided with groove 17, and it is corresponding with the bracing wire groove 16 of the upper body of rod 1；Draw
Wire casing 16, binding post 19 and bracing wire guide 18 are used for the bracing wire 4b for installing No. 2 sensors.
As shown in figure 5, above-mentioned goaf roof and floor deformation and the application method of obturation stress monitoring integrated apparatus, step
It is rapid as follows：
The first step：The field condition monitored as needed, determine that roof and floor monitors drilling depth；Wherein Roof Monitor drills
27 depth should be not less than caving zone height, and caving zone is highly calculated by existing caving zone calculation formula；Bottom plate monitoring drilling 28 is deep
Spend HfCalculated according to A.S.Vesic formula：
Wherein, xpTo move towards plastic zone scope along working face,For floor rock internal friction angle；
Second step：Drilled according to the top of calculating, bottom plate monitoring drilling depth, mounting arrangements are integrally disguised after drilling
Put；
Three stay-supported type displacement sensors are arranged first, and the bracing wire 4a for No. 1 sensor for monitoring roof deformation is anchored into top
Inner chamber is introduced from the threading hole of top plate fixed disk 2 behind 27 bottoms of plate monitoring drilling, is drawn from the pore 20 of the lower body of rod 8 and is connected to 1
On number sensor；The bracing wire 4c for No. 3 sensors for monitoring bottom deformation is anchored into behind 28 bottoms of bottom plate monitoring drilling and consolidated from bottom plate
The threading hole of price fixing 9 introduces inner chamber, is connected to by drawing wire conduit 12 from the extraction of pore 20 of the lower body of rod 8 on No. 3 sensors；
The bracing wire 4b for No. 2 sensors for monitoring roof to floor convergence is fastened on binding post 19, along upper body of rod bracing wire groove 16
Rise, after the bracing wire guide 18 in middle part connecting rod groove 17 is turned back, inner chamber is introduced from the upper bracing wire hole of the body of rod 1, then by lower beam
The pore 20 of body is drawn and is connected on No. 2 sensors；
The upper body of rod 1 of measuring staff is stretched out, measuring staff height is adjusted by middle part connecting rod 6, is fixed with bolt 11, makes measuring staff two
End is held out against with top, bottom plate, and ensures that top, the threading hole of bottom fixed disk 2 and 9 are consistent with drilling, and two stress monitoring instruments, which are in, to be filled
Body side is filled out, and is fixed by pushing up fixed disk 2 and bottom plate fixed disk 9 with crab-bolt 3 and top, bottom plate；
By topping-up pump, into the pressure capsule 22 of two sets of stress monitoring instruments, fluid injection to predetermined value, closes single-pass magnetic valve 25；For
, it is necessary to bury stress monitoring instrument with filler, it is that horizontal stress monitors to bury height for influence when reducing filling to device
The present position of instrument 14；Mounting arrangements finish；
3rd step：The bracing wire of three displacement transducers is tightened up, by horizontal stress monitor 14, the and of vertical stress monitor 15
The signal wire of displacement monitor 10 accesses monitoring station by data wire, is monitored after to be filled；Opened in the filling of working face coal body 5
During adopting, crush, bottom plate is heaved and obturation 7 is pressed, and measuring staff will be caused to compress, the upper body of rod 1 and middle part connecting rod 6
Between relatively move, make bracing wire 4a, 4b and 4c tensioning of No. 1, No. 2 and No. 3 sensor, produce displacement data signal, make
Horizontal stress monitor 14 and vertical stress monitor 15 produce horizontal stress and vertical stress data-signal respectively；Above-mentioned data
Signal is transferred to monitoring station；Wherein, the Monitoring Data of No. 2 sensors is roof to floor convergence, and the Monitoring Data of No. 2 sensors subtracts
The Monitoring Data for removing No. 3 sensors is the deflection that directly pushes up of top plate, and the Monitoring Data of No. 1 sensor subtracts No. 3 sensors
Monitoring Data is the deflection of top plate base object model, and the Monitoring Data of No. 3 sensors is the pucking amount of bottom plate.
Claims (2)
1. a kind of goaf roof and floor deformation and obturation stress monitoring integrated apparatus, it is characterised in that by measuring staff and attachment
The displacement monitor of monitoring roof and floor displacement on measuring staff and the stress monitoring instrument composition of monitoring filling body stress；
Described displacement monitor is made up of the displacement transducer of three stay-supporteds, is installed on the fixed disk of the lower body of rod, point
Not Yong Yu roof deformation, roof to floor convergence and bottom deformation monitoring, successively by No. 1 sensor, No. 2 sensors, No. 3 sensing
Device is monitored；
Described stress monitoring instrument has two sets, is respectively used to monitor obturation horizontal stress and vertical stress；
Described measuring staff is set with is formed successively by three the upper body of rod, middle part connecting rod and the lower body of rod hollow rods, upper body of rod insertion
It relative can be slided in the connecting rod of middle part, certain height can be formed by regulation in the lower body of rod of middle part connecting rod insertion；Under described
The middle part and bottom of the body of rod are provided through the pore of body of rod both sides respectively；Fixed at the top of the described upper body of rod provided with strip top plate
Disk, the threading hole for being used for No. 1 sensor bracing wire and passing through communicated with measuring staff inner chamber is offered among top plate fixed disk, passes through top plate
Fixed disk can be such that measuring staff upper end is fixed on top plate；Lower post is provided with bottom plate fixed disk, is offered among bottom plate fixed disk
What is communicated with measuring staff inner chamber is used for the threading hole of No. 3 sensor bracing wires, by bottom plate fixed disk measuring staff lower end can be made to be fixed on bottom
On plate；The bracing wire groove of No. 2 sensor bracing wires is offered on the external wall length direction of described upper boom, bracing wire groove lower end, which is provided with, to be fixed
The binding post of No. 2 sensor bracing wire terminations and the threading hole for entering upper boom intracoelomic cavity；At the top of the body of rod of described middle part connecting rod
Provided with bracing wire guide；
Described stress monitoring instrument, by pressure capsule, cambered surface housing, liquid-pressure pick-up, liquid injection pipe and single-pass solenoid valve block into；Arc
Face-piece body is buckled in the pressure for being used to bear obturation on pressure capsule, and liquid-pressure pick-up is placed in the intracapsular portion of pressure, fluid pressure signal
It is sent to the controller of monitoring station and single-pass magnetic valve；Liquid injection pipe passes through the lower body of rod, and single-pass magnetic valve is placed in lower beam intracoelomic cavity simultaneously
It is serially connected on liquid injection pipe, liquid injection pipe one end connects with liquid-injection equipment, and the other end is with pressing intracapsular portion to connect；Wherein, horizontal stress is supervised
Survey instrument to be attached at the middle part pore of the lower body of rod, the horizontal direction of the positive arc of cambered surface housing facing to obturation；Vertical stress is supervised
Survey instrument to be attached at the bottom pore of the lower body of rod, the positive arc of cambered surface housing is face-up；
The equidistant adjustment hole of two rows is symmetrically opened up on the body of rod of the middle part connecting rod of the measuring staff, is processed on the body of rod of the lower body of rod
There are screw corresponding with adjustment hole, screw measuring staff is fixed in certain height after installing bolt.
2. roof and floor deformation in goaf as claimed in claim 1 and obturation stress monitoring integrated apparatus, it is characterised in that
The case top and housing surrounding of described cambered surface housing are designed as being flexibly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721016942.4U CN207019657U (en) | 2017-08-15 | 2017-08-15 | Goaf roof and floor deformation and obturation stress monitoring integrated apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721016942.4U CN207019657U (en) | 2017-08-15 | 2017-08-15 | Goaf roof and floor deformation and obturation stress monitoring integrated apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207019657U true CN207019657U (en) | 2018-02-16 |
Family
ID=61478545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721016942.4U Withdrawn - After Issue CN207019657U (en) | 2017-08-15 | 2017-08-15 | Goaf roof and floor deformation and obturation stress monitoring integrated apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207019657U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426517A (en) * | 2018-03-23 | 2018-08-21 | 中国科学院武汉岩土力学研究所 | A kind of country rock radial displacement measuring device |
| CN108590766A (en) * | 2018-04-20 | 2018-09-28 | 程刚 | A kind of depression of coal mine gob overlying warp damage rock stratum monitors system |
-
2017
- 2017-08-15 CN CN201721016942.4U patent/CN207019657U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426517A (en) * | 2018-03-23 | 2018-08-21 | 中国科学院武汉岩土力学研究所 | A kind of country rock radial displacement measuring device |
| CN108590766A (en) * | 2018-04-20 | 2018-09-28 | 程刚 | A kind of depression of coal mine gob overlying warp damage rock stratum monitors system |
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