CN110261891A - A kind of karst features blasting vibration test instrument - Google Patents
A kind of karst features blasting vibration test instrument Download PDFInfo
- Publication number
- CN110261891A CN110261891A CN201910503003.XA CN201910503003A CN110261891A CN 110261891 A CN110261891 A CN 110261891A CN 201910503003 A CN201910503003 A CN 201910503003A CN 110261891 A CN110261891 A CN 110261891A
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- Prior art keywords
- outer cylinder
- interior bar
- guard box
- fixed outer
- test instrument
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- 238000005422 blasting Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 29
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 6
- 238000013016 damping Methods 0.000 claims description 36
- 230000006698 induction Effects 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to blasting vibration test instrument technical fields, specially a kind of karst features blasting vibration test instrument, including fixed outer cylinder, interior bar is installed, guard box and control equipment, installation interior bar is plugged in the inside of fixed outer cylinder, the bottom for installing interior bar is equipped with vibration sensor, the upper end of installation interior bar is welded with guard box, the inside of guard box is equipped with control equipment, the utility model has the advantages that the lower end of the fixed outer cylinder in the present invention is the brill ground end of tapered end, and the outer wall of fixed outer cylinder is provided with helical tooth, it is fixed convenient for piercing fixed outer cylinder inside ground end, it will be equipped with inside the installation interior bar insertion fixed outer cylinder of vibration sensor, facilitate installation;Installation the installed vibration sensor in interior bar lower end is protected by fixed outer cylinder, prevents the rubble in ground end from causing to wear to vibration sensor, and prevent the moisture attack vibration sensor of ground end.
Description
Technical field
The present invention relates to blasting vibration test instrument technical field, specially a kind of karst features blasting vibration test instrument.
Background technique
Blasting vibration measurement is the important link of blast working, and the method for explosion and the parameter of explosion influence explosion earthquake
Oscillation intensity instructs blast working by monitoring, promotes blast working efficiency, usually supervised by blasting vibration test instrument
It surveys.
In karst features blast working, when being installed to blasting vibration test instrument, especially karst deep layer is monitored
In the process, it needs first to excavate a monitoring deep hole, the sensor of blasting vibration test instrument is packed into inside monitoring deep hole, was installed
Journey is more troublesome;It is directly that the sensor of blasting vibration test instrument is buried in karst strata since the rubble of karst features is more
Under, it is easy to damage the sensor of blasting vibration test instrument;And blasting vibration test instrument control control equipment is usually protected by one
Protecting box is protected, but in outdoor blasting environment, the control equipment of blasting vibration test instrument is easy to receive the influence of high temperature.
Summary of the invention
The purpose of the present invention is to provide a kind of karst features blasting vibration test instrument, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of karst features blasting vibration test instrument, including
Fixed outer cylinder, installation interior bar, guard box and control equipment, the bottom of the fixed outer cylinder for coniform brill end, fixation
The outer wall of outer cylinder is provided with helical tooth, and the external wall of upper portion of fixed outer cylinder is welded with a pair of symmetrically arranged hand handle, outside the fixation
The upper end outer wall of cylinder is welded with support plate, and the installation interior bar is plugged in the inside of fixed outer cylinder, and the bottom for installing interior bar opens up
There is sensor mounting hole, sensor mounting hole inner wall is equipped with internal screw thread, and sensor mounting hole has been connected through a screw thread vibration sense
Device is answered, the lower end of vibration sensor is equipped with induction terminal, and the inner bottom surface of the fixed outer cylinder offers induction end jack, and feels
Terminal cooperation is answered to be plugged in induction end jack, the upper end of the installation interior bar is welded with guard box, and the lower surface of guard box is tight
Paste the upper surface setting of support plate, and support plate is fixedly connected with the lower surface of guard box by screw, the guard box it is interior
Portion bottom surface passes through damping group at the angle of four ends and is respectively connected with an angled seat, and the upper surface for being close to angled seat is provided with control and sets
It is standby, metallic channel is offered inside the installation interior bar, metallic channel is through to the inner bottom surface of guard box, and the lower end for controlling equipment is set
There is connecting line, connecting line is arranged in the metallic channel set by installing inside interior bar, and the lower end of connecting line and vibration sensor electricity
Property connection, the guard box internal side wall is bonded with water absorption layer, and the upper surface for being close to the guard box is provided with top cover, guard box
It is fixedly connected by bolt with top cover, the upper surface of the top cover is welded with weather board.
Preferably, multiple adding in triangle plate are welded between the lower surface of the support plate and the outer wall of fixed outer cylinder
Strong floor, the lower surface setting of deep floor vertical support disk.
Preferably, the outer wall of the installation interior bar and the inner wall of fixed outer cylinder cooperate sliding contact, install the bottom of interior bar
It is contacted with the cooperation of the interior bottom portion of fixed outer cylinder.
Preferably, the damping group includes that damping sleeve, flexible interior bar and damping spring, damping sleeve are vertically welded in guarantor
The bottom surface of protecting box, flexible interior bar cooperation is plugged in the inside of damping sleeve, and the upper end of flexible interior bar and the lower surface of angled seat are welded
Fixation is connect, the outer cover of damping sleeve is equipped with damping spring, and damping spring connects the lower surface of angled seat and the inner bottom of guard box
Face.
Preferably, the angled seat is mutually perpendicular to the supporter being formed by welding by three pieces of support plates, and four angled seats are tight
Four ends in the lower section angle of patch package control equipment.
Preferably, the lower surface of the weather board and the upper surface of top cover constitute the heat-insulation chamber of sealing space, in heat-insulation chamber
Portion is filled with heat-barrier material.
Preferably, the outside of the hand handle is bonded with non-slip rubber set, and non-slip rubber set outer wall is provided with anti-sliding/friction
Line.
Compared with prior art, rationally, functional has the advantage that for structure of the invention setting
1. the lower end of the fixed outer cylinder in the present invention is the brill ground end of tapered end, and the outer wall of fixed outer cylinder is provided with spiral
Tooth is fixed convenient for piercing fixed outer cylinder inside ground end, and the installation interior bar insertion for being equipped with vibration sensor is fixed outer
Cylinder is internal, facilitates installation;
2. in the present invention, installation the installed vibration sensor in interior bar lower end is protected by fixed outer cylinder, prevent broken in ground end
Stone causes to wear to vibration sensor, and prevents the moisture attack vibration sensor of ground end;
3. the control equipment in the present invention is installed in inside guard box, damping group can play the control equipment placed in angled seat
To damping effect, guard box internal side wall is bonded with water absorption layer, and the steam in guard box inner air can be absorbed in water absorption layer, prevents
Sealing vapour damages control equipment, the heat-insulation chamber of the upper surface composition sealing space of the lower surface and top cover of weather board, every
The intracavitary portion of heat is filled with heat-barrier material, and heat-insulation chamber barrier direct sunlight carries out direct projection to guard box, prevents guard box internal temperature
It is excessively high.
Detailed description of the invention
Fig. 1 is the perspective view of the explosion of structure of the invention;
Fig. 2 is the sectional front view of structure of the invention;
Fig. 3 is the enlarged drawing in Fig. 2 at A;
Fig. 4 is the schematic diagram of fixed outer cylinder in the present invention.
In figure: fixed outer cylinder 1, guard box 3, control equipment 4, top cover 5, bores ground end 6, helical tooth 7, sense at installation interior bar 2
Jack 8 should be held, hand handle 9, support plate 10, vibration sensor 11, induction terminal 12, metallic channel 13, damping group 14, angled seat 15, connected
Wiring 16, weather board 17, heat-insulation chamber 18, water absorption layer 19, damping sleeve 20, flexible interior bar 21, damping spring 22.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1 to FIG. 4: a kind of karst features blasting vibration test instrument, including
Fixed outer cylinder 1, installation interior bar 2, guard box 3 and control equipment 4, in conjunction with shown in Fig. 1 and Fig. 4, fixed outer cylinder 1 is cylinder-like body,
The bottom of fixed outer cylinder 1 for coniform brill end 6, pierces underground convenient for fixed outer cylinder 1, the outer wall of fixed outer cylinder 1 is set
It is equipped with helical tooth 7, by rotating to fixed outer cylinder 1, convenient for making fixed outer cylinder 1 pierce underground, the top of fixed outer cylinder 1
Outer wall is welded with a pair of symmetrically arranged hand handle 9, pulls torsion for carrying out to fixed outer cylinder 1, the outside of hand handle 9 is bonded with anti-
Sliding rubber sleeve, and non-slip rubber set outer wall is provided with anti-skidding form friction pattern, increases the frictional force between palm and hand handle 9.
Referring to figs. 1 and 2, the upper end outer wall of fixed outer cylinder 1 is welded with support plate 10, the lower surface of support plate 10 with
Multiple deep floors in triangle plate, the following table of deep floor vertical support disk 10 are welded between the outer wall of fixed outer cylinder 1
Face setting, enhances the structure connectivity between fixed outer cylinder 1 and support plate 10, installation interior bar 2 be it is cylindric, installation interior bar 2 is inserted
The inner wall of the outer wall and fixed outer cylinder 1 that are located at the inside of fixed outer cylinder 1, and install interior bar 2 cooperates sliding contact, installs interior bar 2
The interior bottom portion cooperation of bottom and fixed outer cylinder 1 contact, guarantee to fit closely between fixed outer cylinder 1 and installation interior bar 2, avoid
Gap between fixed outer cylinder 1 and installation interior bar 2 is excessive and influences the precision of vibration measurement, and the bottom of installation interior bar 2 offers
Sensor mounting hole, sensor mounting hole inner wall is equipped with internal screw thread, and sensor mounting hole has been connected through a screw thread vibration induction
Device 11, the lower end of vibration sensor 11 are equipped with induction terminal 12, and induction terminal 12 is used to receive the vibration signal of ground end, fixed outer
The inner bottom surface of cylinder 1 offers induction end jack 8, and incudes the cooperation of terminal 12 and be plugged in induction end jack 8.
Referring to figs. 1 and 2, the upper end for installing interior bar 2 is welded with guard box 3, and support is close in the lower surface of guard box 3
The upper surface of disk 10 is arranged, and support plate 10 is fixedly connected with the lower surface of guard box 3 by screw, the inner bottom of guard box 3
Face passes through damping group 14 at the angle of four ends and is respectively connected with an angled seat 15, and the upper surface for being close to angled seat 15 is provided with control
Equipment 4, angled seat 15 is mutually perpendicular to the supporter being formed by welding by three pieces of support plates, and four angled seats 15 are close to package control equipment
4 four ends in lower section angle limits control equipment 4, prevents the offset in control 4 generation of equipment level, installs in interior bar 2
Portion offers metallic channel 13, and metallic channel 13 is through to the inner bottom surface of guard box 3, and the lower end of control equipment 4 is equipped with connecting line 16,
Connecting line 16 is arranged in metallic channel 13 set by 2 inside of installation interior bar, and 11 electricity of the lower end of connecting line 16 and vibration sensor
Property connection, vibration sensor 11 by vibration signal feed back to control equipment 4 in, recorded and analyzed.
As shown in figure 3, wherein the structure of damping group 14 is made of damping sleeve 20, flexible interior bar 21 and damping spring 22,
Damping sleeve 20 is vertically welded in the bottom surface of guard box 3, and the upper end of flexible interior bar 21 and the lower surface of angled seat 15 are welded and fixed, and stretches
Contracting interior bar 21 cooperates the inside for being plugged in damping sleeve 20, prevents from shifting when about 15 amplitude of angled seat, damping sleeve 20
Outer cover is equipped with damping spring 22, and damping spring 22 connects the lower surface of angled seat 15 and the inner bottom surface of guard box 3, damping spring
The control equipment 4 placed in 22 pairs of angled seats 15 plays damping effect, and 3 internal side wall of guard box is bonded with water absorption layer 19, water absorption layer
19 can be absorbed the steam in 3 inner air of guard box, prevent steam from damaging to control equipment 4.
Referring to figs. 1 and 2, the upper surface for being close to guard box 3 is provided with top cover 5, the lateral wall top edge of guard box 3
It is welded with bolt ear, the lateral wall lower edge of top cover 5 is welded with bolt ear, and bolt ear set on guard box 3 and top cover 5 is logical
It crosses bolt to fix, the upper surface of top cover 5 is welded with the weather board 17 of sloped roof shape, and weather board 17 can prevent ponding when raining
The corrosion at 5 top of top cover is caused, the lower surface of weather board 17 and the upper surface of top cover 5 constitute the heat-insulation chamber 18 of sealing space, every
Heat-barrier material is filled with inside hot chamber 18,18 barrier direct sunlight of heat-insulation chamber carries out direct projection to guard box 3, prevents in guard box 3
Portion's temperature is excessively high.
Working principle: when the present invention installs, by the way that fixed outer cylinder 1 is perpendicularly oriented to bottom surface, by holding hand handle 9,
It is reversed while pulling down and to fixed outer cylinder 1, the lower end of fixed outer cylinder 1 is the brill of tapered end ground end 6, and fixed
The outer wall of outer cylinder 1 is provided with helical tooth 7, is fixed convenient for piercing fixed outer cylinder 1 inside ground end, and installation interior bar 2 is plugged
In fixed outer cylinder 1, installation the installed vibration sensor 11 in 2 lower end of interior bar is protected by fixed outer cylinder 1, is prevented in ground end
Rubble causes to wear to vibration sensor 11, and prevents the moisture attack vibration sensor 11 of ground end, 11 lower end of vibration sensor
Induction terminal 12 cooperation be plugged in the induction end jack 8 that 1 inner bottom surface of fixed outer cylinder is opened, for receiving the vibration of ground end
Signal, and vibration signal is fed back to control equipment 4 by connecting line 16 by vibration sensor 11, carries out data record and analysis;
Control equipment 4 is installed in inside guard box 3, and four ends in the bottom angle of control equipment 4 is wrapped up by angled seat 15, and angled seat 15
It is connect with 3 inner bottom surface of guard box by damping group 14, damping group 14, which can play the control equipment 4 placed in angled seat 15, to be subtracted
Effect is shaken, 3 internal side wall of guard box is bonded with water absorption layer 19, and the steam in 3 inner air of guard box can be absorbed in water absorption layer 19,
Prevent steam from damaging to control equipment 4, the upper surface of top cover 5 is welded with the weather board 17 of sloped roof shape, weather board 17
It can prevent ponding when raining from causing the corrosion at 5 top of top cover, the lower surface of weather board 17 and the upper surface of top cover 5 constitute and seal
The heat-insulation chamber 18 in space, heat-barrier material is filled with inside heat-insulation chamber 18, and 18 barrier direct sunlight of heat-insulation chamber carries out directly guard box 3
It penetrates, prevents 3 internal temperature of guard box excessively high.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of karst features blasting vibration test instrument, including fixed outer cylinder (1), installation interior bar (2), guard box (3) and control
Equipment (4), it is characterised in that: the bottom of the fixed outer cylinder (1) for coniform brill end (6), fixed outer cylinder (1) it is outer
Wall is provided with helical tooth (7), and the external wall of upper portion of fixed outer cylinder (1) is welded with a pair of symmetrically arranged hand handle (9), outside the fixation
The upper end outer wall of cylinder (1) is welded with support plate (10), the inside installed interior bar (2) and be plugged in fixed outer cylinder (1), in installation
The bottom of bar (2) offers sensor mounting hole, and sensor mounting hole inner wall is equipped with internal screw thread, and sensor mounting hole passes through spiral shell
Line is connected with vibration sensor (11), and the lower end of vibration sensor (11) is equipped with induction terminal (12), the fixed outer cylinder (1)
Inner bottom surface offers induction end jack (8), and incudes terminal (12) cooperation and be plugged in induction end jack (8), the installation
The upper end of interior bar (2) is welded with guard box (3), and the upper surface setting of support plate (10) is close in the lower surface of guard box (3), and props up
Support plate (10) is fixedly connected with the lower surface of guard box (3) by screw, and the inner bottom surface of the guard box (3) is held close to four
Pass through damping group (14) at angle and be respectively connected with an angled seat (15), the upper surface for being close to angled seat (15) is provided with control equipment
(4), it being offered metallic channel (13) inside the installation interior bar (2), metallic channel (13) is through to the inner bottom surface of guard box (3),
The lower end for controlling equipment (4) is equipped with connecting line (16), connecting line (16) setting metallic channel set by installation interior bar (2) inside
(13) in, and the lower end of connecting line (16) and vibration sensor (11) are electrically connected, and guard box (3) internal side wall is bonded with
Water absorption layer (19), the upper surface for being close to the guard box (3) are provided with top cover (5), and guard box (3) passes through bolt and top cover (5)
It is fixedly connected, the upper surface of the top cover (5) is welded with weather board (17).
2. a kind of karst features blasting vibration test instrument according to claim 1, it is characterised in that: the support plate (10)
Lower surface and fixed outer cylinder (1) outer wall between be welded with multiple deep floors in triangle plate, deep floor vertically props up
The lower surface of support plate (10) is arranged.
3. a kind of karst features blasting vibration test instrument according to claim 1, it is characterised in that: the installation interior bar
(2) inner wall of outer wall and fixed outer cylinder (1) cooperates sliding contact, installs the bottom of interior bar (2) and the inside of fixed outer cylinder (1)
Bottom cooperation contact.
4. a kind of karst features blasting vibration test instrument according to claim 1, it is characterised in that: the damping group (14)
Including damping sleeve (20), flexible interior bar (21) and damping spring (22), damping sleeve (20) is vertically welded in guard box (3)
Bottom surface, flexible interior bar (21) cooperation are plugged in the inside of damping sleeve (20), and the upper end and angled seat (15) of flexible interior bar (21)
Lower surface be welded and fixed, the outer cover of damping sleeve (20) is equipped with damping spring (22), and damping spring (22) connects angled seat
(15) inner bottom surface of lower surface and guard box (3).
5. a kind of karst features blasting vibration test instrument according to claim 1, it is characterised in that: the angled seat (15) by
Three pieces of support plates are mutually perpendicular to the supporter being formed by welding, and four angled seats (15) are close under package control equipment (4)
Side four ends angle.
6. a kind of karst features blasting vibration test instrument according to claim 1, it is characterised in that: the weather board (17)
Lower surface and the upper surface of top cover (5) constitute the heat-insulation chamber (18) of sealing space, heat-insulated material is filled with inside heat-insulation chamber (18)
Material.
7. a kind of karst features blasting vibration test instrument according to claim 1, it is characterised in that: the hand handle (9)
Outside is bonded with non-slip rubber set, and non-slip rubber set outer wall is provided with anti-skidding form friction pattern.
Priority Applications (1)
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CN201910503003.XA CN110261891A (en) | 2019-06-11 | 2019-06-11 | A kind of karst features blasting vibration test instrument |
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CN201910503003.XA CN110261891A (en) | 2019-06-11 | 2019-06-11 | A kind of karst features blasting vibration test instrument |
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CN110261891A true CN110261891A (en) | 2019-09-20 |
Family
ID=67917613
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CN201910503003.XA Pending CN110261891A (en) | 2019-06-11 | 2019-06-11 | A kind of karst features blasting vibration test instrument |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111623747A (en) * | 2020-04-22 | 2020-09-04 | 山东交通学院 | Ground settlement monitoring system and monitoring method thereof |
CN112083479A (en) * | 2020-10-16 | 2020-12-15 | 保利新联爆破工程集团有限公司 | Safety monitoring method and device in mine reclamation process |
CN112462416A (en) * | 2020-11-25 | 2021-03-09 | 保利新联爆破工程集团有限公司 | Method and device for monitoring blasting vibration of open stope |
CN112963685A (en) * | 2021-02-23 | 2021-06-15 | 中国矿业大学(北京) | Sand cobble stratum tunnel construction earth pressure gauge installation protection device |
CN113029250A (en) * | 2021-04-08 | 2021-06-25 | 武汉科技大学 | Blasting vibration and side slope displacement monitoring devices |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN111623747A (en) * | 2020-04-22 | 2020-09-04 | 山东交通学院 | Ground settlement monitoring system and monitoring method thereof |
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CN112083479A (en) * | 2020-10-16 | 2020-12-15 | 保利新联爆破工程集团有限公司 | Safety monitoring method and device in mine reclamation process |
CN112462416A (en) * | 2020-11-25 | 2021-03-09 | 保利新联爆破工程集团有限公司 | Method and device for monitoring blasting vibration of open stope |
CN112963685A (en) * | 2021-02-23 | 2021-06-15 | 中国矿业大学(北京) | Sand cobble stratum tunnel construction earth pressure gauge installation protection device |
CN113029250A (en) * | 2021-04-08 | 2021-06-25 | 武汉科技大学 | Blasting vibration and side slope displacement monitoring devices |
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