CN105823546B - A kind of major diameter freezes vertical Blast Vibration Monitoring, oscillation damping method and system - Google Patents
A kind of major diameter freezes vertical Blast Vibration Monitoring, oscillation damping method and system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
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Abstract
The present invention discloses a kind of major diameter and freezes vertical Blast Vibration Monitoring, oscillation damping method and system, is related to blast monitoring technical field, is able to solve in the prior art based on the test method of hanging scaffold to production bring interference problem.The method includes：After the completion of the binding of borehole wall reinforcing bar, vibration-measuring sensor and vialog are fixed on borehole wall reinforcing bar；Borehole wall reinforcing bar pour forming the borehole wall with concrete, after pouring, the chamber door of vialog is located at borehole wall surface；Vialog switch is opened, concussion of blasting caused by the continuation blast working to vertical is monitored；According to the successively detonating primer of sequence from inside to outside, blast working is continued to vertical.The present invention is suitable for major diameter and freezes vertical Blast Vibration Monitoring and vibration damping.
Description
Technical Field
The invention relates to the technical field of blasting monitoring, in particular to a method and a system for monitoring and damping large-diameter freezing vertical shaft blasting vibration.
Background
In the coal mine construction and production, the construction technology of shaft engineering is complex, the operation site is narrow, the influence of factors such as geological condition change is large, and the construction quality of the shaft directly influences the normal use and the stability in the later period. The drilling and blasting method is a main construction method of shaft engineering, frequent and large-scale blasting operation is carried out in the shaft engineering construction, blasting seismic waves are inevitably generated, and the blasting seismic waves are rapidly transmitted from a blasting source to surrounding media. The propagation process of the blasting seismic wave is very complex and is influenced by various factors, such as the position of a blasting source, the type and performance of explosives, the charge amount, the detonation mode, the arrangement form of blastholes and the like. When the blasting vibration reaches a certain strength, the engineering hazards such as reduction or instability of the strength of surrounding rock masses, cracking deformation of a supporting structure, even local collapse and the like can be caused, and the blasting quality, the shaft tunneling construction efficiency and the engineering economic benefit are influenced. The damage and control of the blasting vibration effect become important subjects of the blasting safety technology research at home and abroad.
The blasting vibration tester is a device for converting a vibration signal generated by blasting into a digital signal which can be directly read and processed, and comprises a sensor, a data acquisition device and a data line. The wall blasting vibration response analysis needs a large amount of data, and the common test is to fix a sensor on the wall of a well through a bolt, and a vibration tester host is placed on a hanging scaffold and is tested along with excavation. The interference of the platform crane test on production is large, and the difference of collected signal data and the monitoring caused by reinstalling the sensor have certain discontinuity, so that the later analysis of the signal data is greatly influenced.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and a system for monitoring and damping large-diameter freezing vertical shaft blasting vibration, so as to solve the problem of interference caused to production by a hoisting disk-based testing method in the prior art, and the problem of influence on later analysis of signal data caused by difference of acquired signal data and certain discontinuity in monitoring due to reinstallation of a sensor.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
on one hand, the embodiment of the invention provides a large-diameter freezing vertical shaft blasting vibration monitoring and damping method, which comprises the following steps:
binding well wall reinforcing steel bars in the formed shaft rough diameter in the vertical shaft construction process;
after the well wall reinforcing steel bars are bound, fixing the vibration measuring sensor and the vibration measuring instrument on the well wall reinforcing steel bars; the vibration measuring sensor is connected with the vibration measuring instrument through a cable;
pouring the well wall reinforcing steel bars by using concrete to form a well wall, and after pouring, positioning a box door of the vibration meter on the surface of the well wall;
opening a switch of a vibration meter, and monitoring the blasting vibration generated by the continuous blasting construction of the vertical shaft;
setting blast holes on the face of a vertical shaft through an umbrella drill and filling explosives, and respectively adopting detonating detonators with sections of 1, 2, 3, 4 and 5 from inside to outside according to the center of a shaft; the explosive charges in the peripheral holes are lancing explosive charges, and each lancing explosive charge comprises a lancing pipe, two symmetric lancing of which are arranged on one side wall along the axial direction;
and sequentially detonating the detonators from inside to outside, and continuously blasting the opposite well.
Optionally, during the vertical shaft construction, before binding the well wall reinforcing steel bars in the formed shaft path, the method further comprises: and customizing the vibration measuring sensor and the vibration measuring instrument.
Optionally, the customized vibration measurement sensor comprises: selecting a vibration measuring sensor; the original sensor joint of the selected vibration measuring sensor is cancelled, a signal wire is directly led out from the interior of the sensor, the wire outlet is subjected to waterproof insulation treatment, and a protective hose is additionally arranged outside the signal wire.
Optionally, the customized vibration measurement sensor further comprises: the sensor is internally packaged by insulating waterproof glue, the joint of the upper cover and the lower cover of the sensor is sealed by a waterproof sealing ring, and the outside of the sensor is completely packaged by the waterproof glue.
Optionally, the customized vibration meter comprises: processing an iron plate or a steel plate with the thickness of 1.5mm into a box body; the left side surface and the right side surface of the box body are respectively provided with three round holes with the diameter of 3cm, the bottom of the box body is provided with 2 round holes with the diameter of 2cm, the round holes are used for connecting instrument circuits and fixing the box body, and the front surface of the box body is provided with a built-in box door capable of being opened and closed reliably; placing an asbestos foam heat insulation layer in the box body; the vibration meter host and the matched explosion-proof lithium battery are placed in the box body, the hole of the wiring is sealed by glass cement, and the box door is provided with a lock.
Optionally, the binding of the well wall reinforcing steel bars in the formed shaft waste diameter in the vertical shaft construction process includes: in the construction process of a vertical shaft, binding a well wall inner ring steel bar vertical bar, a well wall outer layer steel bar vertical bar and a ring bar in the formed shaft;
after the reinforcement of wall of a well reinforcing bar is accomplished, will survey vibration sensor and fix on the wall of a well reinforcing bar with the vibration meter, include: after the well wall reinforcing steel bars are bound, arranging 6 vibration meters according to high linearity of the sections; firmly arranging each vibration meter box body and each vibration measuring sensor at the lap joint of the vertical bar and the annular bar of the steel bar of the inner ring of the well wall, and adjusting the horizontal bubble device on the sensor to a horizontal position and fixing; wherein, same level arranges 2 vibration measurement sensors, and 2 vibration measurement sensors equidistant linear arrangement.
Optionally, the large diameter freeze shaft is a wellbore diameter greater than 8m freeze shaft.
In another aspect, an embodiment of the present invention provides a large-diameter freezing vertical blasting vibration monitoring system, including: the well wall steel bar, the vibration measurement sensor and the vibration measurement instrument; the vibration measuring sensor and the vibration measuring instrument are fixed on the well wall steel bar, and the vibration measuring sensor is connected with the vibration measuring instrument through a cable; the well wall reinforcing steel bar, the vibration measuring sensor and the vibration measuring instrument are poured in the well wall concrete, and a box door of the vibration measuring instrument is positioned on the surface of the well wall.
Optionally, the vibration measuring sensor comprises: directly leading out a signal wire from the inside of the sensor, performing waterproof insulation treatment at the wire outlet, and additionally arranging a protective hose outside the signal wire; the sensor is internally packaged with insulating waterproof glue, a waterproof sealing ring is arranged at the joint of the upper cover and the lower cover of the sensor, and waterproof glue is packaged outside the sensor.
Optionally, the vibration meter comprises: a box body processed by an iron plate or a steel plate with the thickness of 1.5 mm; the left side surface and the right side surface of the box body are respectively provided with three round holes with the diameter of 3cm, the bottom of the box body is provided with 2 round holes with the diameter of 2cm, the round holes are used for connecting instrument circuits and fixing the box body, and the front surface of the box body is provided with a built-in box door capable of being opened and closed reliably;
an asbestos foam heat insulation layer is arranged in the box body; the vibration meter host and the matched explosion-proof lithium battery are placed in the box body, a glass cement seal is arranged at a hole of the wiring, and a lock is arranged at the box door.
According to the large-diameter freezing vertical shaft blasting vibration monitoring and damping method and system provided by the embodiment of the invention, the vibration measuring sensor and the vibration measuring instrument are fixed on the well wall steel bar, so that the problems of interference caused by a test method based on a hanging scaffold to production, difference of acquired signal data caused by reinstallation of the sensor and influence of certain discontinuity on later analysis of the signal data in the monitoring in the prior art can be solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of an embodiment of a large-diameter freezing vertical shaft blasting vibration monitoring and damping method according to the present invention;
FIG. 2 is a schematic diagram of the type of the blasting tube and the explosive package of the vertical shaft;
FIG. 3 is a schematic cross-sectional view of a slit tube;
FIG. 4 is a linear arrangement diagram of the blasting vibration meter in the vertical shaft construction;
FIG. 5 is a schematic diagram of a single-side well wall structure of the large-diameter freezing vertical blasting vibration monitoring system according to the present invention;
FIG. 6 is a combination view of the vibration sensor and the reinforcing bar connecting and fixing clamp and the bolt.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow diagram of an embodiment of a large-diameter freezing vertical shaft blasting vibration monitoring and damping method according to the present invention. Referring to fig. 1, the embodiment of the large-diameter freezing vertical shaft blasting vibration monitoring and damping method of the invention comprises the following steps:
s11, binding well wall reinforcing steel bars in the formed shaft rough diameter in the vertical shaft construction process;
in this embodiment, the large-diameter freezing vertical shaft is a full-freezing vertical shaft with a shaft diameter larger than 8 m.
S12, after the well wall steel bars are bound, fixing the vibration measuring sensor and the vibration measuring instrument on the well wall steel bars; the vibration measuring sensor is connected with the vibration measuring instrument through a cable;
in this embodiment, before the wall of a well concreting, the vibration measurement sensor passes through bolt and clamp and fixes on the wall of a well inner circle reinforcing bar.
S13, pouring the well wall reinforcing steel bars by using concrete to form a well wall, and after pouring, positioning a box door of the vibration meter on the surface of the well wall;
in this embodiment, after pouring, the vibrometer sensor and the vertical shaft wall to be measured are bonded into a whole.
S14, opening a vibration meter switch, and monitoring the blasting vibration generated by the continuous blasting construction of the vertical shaft;
s15, drilling blast holes on the face of the vertical shaft through an umbrella drill and filling explosives, and respectively adopting detonating detonators with sections of 1, 2, 3, 4 and 5 from inside to outside according to the center of the shaft; the explosive charges in the peripheral holes are lancing charges, each lancing charge comprises a lancing pipe, two symmetric lancing are axially arranged on one side wall of each lancing pipe, and explosives are filled in the lancing pipes;
in the embodiment, the directional fracture control blasting technology of the slitting explosive packages is adopted for the peripheral blast holes, so that the peripheral forming is ensured, and the blasting vibration strength is reduced to the maximum extent. The small-dosage wide-pitch blasting method is convenient to realize the small-dosage wide-pitch blasting of the peripheral holes, reduces the blasting vibration effect, and provides a basis for scientifically judging the influence of the blasting vibration on the well wall and ensuring the formation of the periphery of the shaft.
In addition, the peripheral holes are filled with energy-gathering joint-cutting explosive packages, and the rest blast holes can be filled with conventional explosive, and are detonated by respectively adopting 1, 2, 3, 4 and 5 sections of detonators from inside to outside. The shaft is ensured to be formed, and the damage of the blasting vibration effect to the shaft wall structure body is reduced to the maximum extent. Wherein, section 1 is instantaneous detonator, the delay time difference between section 1 and section 2 is 25ms, the delay time difference between section 2 and section 3 is 25ms, the delay time difference between section 3 and section 4 is 25ms, and the delay time difference between section 4 and section 5 is 35 ms. FIG. 2 is a schematic diagram of the type of the blasting tube and the explosive package of the vertical shaft.
The slit cutting pipe comprises two specifications, wherein one specification is an injection molding plastic pipe with an outer diameter d of 40mm, the other specification is an injection molding plastic pipe with an outer diameter d of 50mm and a wall thickness E of 2mm, a buffer section is arranged at the front section of the slit cutting pipe and separated by a buffer plate, the slit width T of the slit cutting pipe is 2 mm-4 mm, and the slit length is not less than 1.5 times of the sum of the lengths of the explosives of all sections. Fig. 3 is a schematic cross-sectional view of a slit tube.
The explosive is a coal mine allowable rock emulsion explosive, the diameter of the explosive is 35mm and 45mm, and the length of the explosive is 300mm and 450mm respectively.
The 5 sections of detonators in the peripheral holes adopt vibration-damping energy-gathering joint-cutting explosive packages and a non-coupling explosive charging mode.
And S16, sequentially detonating the detonators from inside to outside according to the sequence of the center of the shaft, and continuously blasting the opposite shaft.
The large-diameter freezing vertical shaft blasting vibration monitoring and damping method provided by the embodiment of the invention solves the problems of large-diameter freezing vertical shaft blasting vibration monitoring and damping, particularly over aquifer vertical shaft blasting vibration monitoring and damping; according to the method, the vibration measurement sensor and the vibration meter are fixed on the well wall steel bar, the operation is simple, the influence on normal construction of the vertical well is small, the hanging scaffold does not need to be frequently lifted, the continuity of the acquired data is high, and the blasting vibration response condition of the vertical well wall can be accurately reflected, so that the problems that the interference of the hanging scaffold on production is large, the difference of the acquired signal data caused by re-installation of the sensor and the influence of certain discontinuity on the later analysis of the signal data in the prior art can be solved.
In the foregoing method embodiment, optionally, the method further comprises the step of customizing the vibration measuring sensor and the vibration meter before binding the borehole wall reinforcement in the formed wellbore diameter during the vertical shaft construction (S11).
In order to increase the waterproof performance of the vibration measuring sensor, in the foregoing method embodiment, optionally, the customized vibration measuring sensor includes: selecting a vibration measurement sensor with high precision, good waterproof performance and wide temperature range; the original sensor joint of the selected vibration measuring sensor is cancelled, a signal wire is directly led out from the interior of the sensor, the wire outlet is subjected to waterproof insulation treatment, and a protective hose is additionally arranged outside the signal wire.
In the embodiment, two waterproof customizations are adopted, namely, an original sensor joint of a selected vibration measurement sensor is cancelled, a signal wire is directly led out from the inside of the sensor, and waterproof insulation treatment is carried out at the outlet; secondly, a protective hose is additionally arranged outside the signal wire to ensure that the signal wire is not damaged in the concrete pouring process; this can improve the waterproof performance of the sensor.
In order to further increase the waterproof performance of the vibration measurement sensor, in the foregoing method embodiment, the customized vibration measurement sensor may further include three waterproof steps, that is, the sensor is internally packaged by using an insulating waterproof adhesive, the joint between the upper cover and the lower cover of the sensor is sealed by using a waterproof sealing ring, and the exterior of the sensor is completely packaged by using a waterproof adhesive, which is beneficial to enhancing the waterproof effect.
In the foregoing method embodiment, optionally, the customized vibration meter comprises: processing an iron plate or a steel plate with the thickness of 1.5mm into a box body; the left side surface and the right side surface of the box body are respectively provided with three round holes with the diameter of 3cm, the bottom of the box body is provided with 2 round holes with the diameter of 2cm, the round holes are used for connecting instrument circuits and fixing the box body, and the front surface of the box body is provided with a built-in box door capable of being opened and closed reliably; placing an asbestos foam heat insulation layer in the box body; the vibration meter host and the matched explosion-proof lithium battery are placed in the box body, the hole of the wiring is sealed by glass cement, and a simple lock can be arranged at the box door.
In the embodiment, the allowable explosion-proof lithium battery for the coal mine can be selected, the explosion-proof lithium battery can normally and continuously supply power for 10 days, and the appearance of the lithium battery is subjected to waterproof packaging treatment. The long-time uninterrupted monitoring of the vibration meter is realized by continuously supplying power through the lithium battery. The asbestos foam heat insulation layer is arranged in the box body, so that the influence of hydration and heat release of high-strength concrete in the initial pouring stage of the well wall on instrument testing can be prevented.
In the foregoing method embodiment, optionally, the binding of the borehole wall reinforcing bars in the formed borehole during the vertical shaft construction includes: in the construction process of the vertical shaft, the vertical reinforcing steel bars on the inner ring of the shaft wall, the vertical reinforcing steel bars on the outer layer of the shaft wall and the annular reinforcing steel bars are bound in the formed shaft rough diameter.
Fig. 4 is a linear arrangement diagram of the blasting vibration meter in the vertical shaft construction. Referring to fig. 4, after the binding of the well wall reinforcing steel bars is completed, the vibration measuring sensor and the vibration measuring instrument are fixed on the well wall reinforcing steel bars, and the method comprises the following steps: after the well wall reinforcing steel bars are bound, arranging 6 vibration meters according to high linearity of the sections; firmly arranging each vibration meter box body and each vibration measuring sensor at the lap joint of the vertical bar and the annular bar of the steel bar of the inner ring of the well wall, and adjusting the horizontal bubble device on the sensor to a horizontal position and fixing; wherein, same level arranges 2 vibration measurement sensors, and 2 vibration measurement sensors equidistant linear arrangement.
In this embodiment, firmly arrange every vibration meter box and vibration measuring sensor in the perpendicular muscle of wall of a well inner circle reinforcing bar and ring muscle overlap joint, it is firm to both be favorable to vibration meter box and vibration measuring sensor to install, is favorable to the chamber door of vibration meter to be located the wall of a well surface again, is convenient for to the switch of opening the vibration meter and is convenient for to the recycle of vibration meter. In addition, set up a plurality of monitoring points simultaneously along the wall of a well, can realize the synchronous acquisition of the different degree of depth vibration data of the vertical wall of a well of blasting opposite shaft of same time.
FIG. 5 is a schematic diagram of a single-side borehole wall structure of the large-diameter freezing vertical blasting vibration monitoring system according to the present invention. In this embodiment, the large-diameter freezing vertical shaft is a freezing vertical shaft with a shaft diameter larger than 8 m. Referring to fig. 5, an embodiment of the present invention includes: well wall steel bars 51, a vibration measurement sensor 52 and a vibration meter 53; the vibration measuring sensor 52 and the vibration measuring instrument 53 are fixed on the well wall steel bar 51, and the vibration measuring sensor 52 is in cable connection with the vibration measuring instrument 53; the well wall steel bars 51, the vibration measuring sensor 52 and the vibration measuring instrument 53 are poured in the well wall concrete, and the box door of the vibration measuring instrument 53 is positioned on the surface of the well wall. In fig. 5, 54 is the excavated wall of the well, and 55 is the cast wall of the well.
The large-diameter freezing vertical shaft blasting vibration monitoring and damping system provided by the embodiment of the invention solves the problems of large-diameter freezing vertical shaft blasting vibration monitoring and damping, particularly over aquifer vertical shaft blasting vibration monitoring and damping; according to the invention, the vibration measurement sensor and the vibration meter are fixed on the well wall steel bar, the operation is simple, the influence on normal construction of the vertical well is small, the hanging scaffold does not need to be frequently lifted, the continuity of the acquired data is strong, and the blasting vibration response condition of the vertical well wall can be accurately reflected, so that the problems that the interference of the hanging scaffold on production is large, and the acquired signal data difference and monitoring caused by reinstallation of the sensor have certain discontinuity to influence the later analysis of the signal data in the prior art can be solved.
In the foregoing system embodiment, optionally, the borehole wall reinforcing bars 51 include a borehole wall inner ring reinforcing bar vertical bar 51a and a borehole wall outer ring reinforcing bar 51b, and the vibration measuring sensor 52 and the vibration measuring instrument 53 are fixed on the borehole wall inner ring reinforcing bar vertical bar 51 a. Preferably, the vibration measuring sensor 52 and the vibration meter 53 are firmly arranged at the lap joint of the vertical rib and the annular rib (not shown in the figure) of the inner ring steel bar of the well wall.
FIG. 6 is a combination view of the vibration sensor and the reinforcing bar connecting and fixing clamp and the bolt. Referring to fig. 6, the vibration sensor 52 is secured to the borehole wall reinforcement by a clamp 56 and bolts 57.
In the foregoing system embodiment, optionally, the vibration measuring sensor 52 includes: directly leading out a signal wire from the inside of the sensor, performing waterproof insulation treatment at the wire outlet, and additionally arranging a protective hose outside the signal wire; the sensor is internally packaged with insulating waterproof glue, a waterproof sealing ring is arranged at the joint of the upper cover and the lower cover of the sensor, and waterproof glue is packaged outside the sensor.
Referring to fig. 5, in the foregoing system embodiment, optionally, the vibration meter 53 includes: a case 531 formed by processing an iron plate or a steel plate having a thickness of 1.5 mm; the left side surface and the right side surface of the box body 531 are respectively provided with three round holes with the diameter of 3cm, the bottom of the box body 531 is provided with 2 round holes with the diameter of 2cm, the round holes are used for connecting instrument circuits and fixing the box body 531, and the front surface of the box body 531 is provided with a built-in box door capable of being opened and closed reliably; an asbestos foam heat insulation layer 532 is arranged in the box body 531; the main body 533 of the vibration meter and the matched explosion-proof lithium battery 534 are placed in the box body 531, the opening of the wiring is provided with a glass glue seal, and the box door is provided with a lock (not shown in the figure). The door of the vibration meter is positioned on the surface of the well wall 55 after pouring, so that the vibration meter can be conveniently opened and recycled.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A large-diameter freezing vertical shaft blasting vibration monitoring and damping method is characterized by comprising the following steps:
binding well wall reinforcing steel bars in the formed shaft rough diameter in the vertical shaft construction process;
after the well wall reinforcing steel bars are bound, fixing the vibration measuring sensor and the vibration measuring instrument on the well wall reinforcing steel bars; the vibration measuring sensor is connected with the vibration measuring instrument through a cable;
pouring the well wall reinforcing steel bars by using concrete to form a well wall, and after pouring, positioning a box door of the vibration meter on the surface of the well wall;
simultaneously, opening a switch of a vibration meter to monitor the blasting vibration generated by the continuous blasting construction of the vertical shaft;
setting blast holes on the face of a vertical shaft through an umbrella drill and filling explosives, and respectively adopting detonating detonators with sections of 1, 2, 3, 4 and 5 from inside to outside from the center of a shaft; the explosive charges in the peripheral holes are lancing charges, each lancing charge comprises a lancing pipe, two symmetric lancing are axially arranged on one side wall of each lancing pipe, and explosives are filled in the lancing pipes;
and sequentially detonating the detonators from inside to outside, and continuously blasting the opposite well.
2. The method of claim 1, wherein prior to tying the wall rebars within the formed wellbore wall gauge during vertical shaft construction, the method further comprises:
and customizing the vibration measuring sensor and the vibration measuring instrument.
3. The method of claim 2, wherein the customized vibration measurement sensor comprises:
selecting a vibration measuring sensor;
the original sensor joint of the selected vibration measuring sensor is cancelled, a signal wire is directly led out from the interior of the sensor, the wire outlet is subjected to waterproof insulation treatment, and a protective hose is additionally arranged outside the signal wire.
4. The method of claim 3, wherein the customized vibration measurement sensor further comprises:
the sensor is internally packaged by insulating waterproof glue, the joint of the upper cover and the lower cover of the sensor is sealed by a waterproof sealing ring, and the outside of the sensor is completely packaged by the waterproof glue.
5. The method of claim 3, wherein the customized vibration meter comprises:
processing an iron plate or a steel plate with the thickness of 1.5mm into a box body; the left side surface and the right side surface of the box body are respectively provided with three round holes with the diameter of 3cm, the bottom of the box body is provided with 2 round holes with the diameter of 2cm, the round holes are used for connecting instrument circuits and fixing the box body, and the front surface of the box body is provided with a built-in box door capable of being opened and closed reliably;
placing an asbestos foam heat insulation layer in the box body;
the vibration meter host and the matched explosion-proof lithium battery are placed in the box body, the hole of the wiring is sealed by glass cement, and the box door is provided with a lock.
6. The method according to claim 1 or 5,
in the vertical shaft construction process, the binding of well wall reinforcing steel bars in the formed pitshaft rough diameter comprises the following steps: in the construction process of the vertical shaft, binding a shaft wall inner ring steel bar vertical bar, a shaft wall outer layer steel bar vertical bar and a ring bar in the formed shaft wall rough diameter;
after the reinforcement of wall of a well reinforcing bar is accomplished, will survey vibration sensor and fix on the wall of a well reinforcing bar with the vibration meter, include:
after the well wall reinforcing steel bars are bound, arranging 6 vibration meters according to high linearity of the sections;
firmly arranging each vibration meter box body and each vibration measuring sensor at the lap joint of the vertical bar and the annular bar of the steel bar of the inner ring of the well wall, and adjusting the horizontal bubble device on the sensor to a horizontal position and fixing; wherein, same level arranges 2 vibration measurement sensors, and 2 vibration measurement sensors equidistant linear arrangement.
7. The method of claim 1, wherein the large diameter freeze shaft is a freeze shaft having a wellbore diameter greater than 8 m.
8. A large diameter freezes vertical blasting vibration monitoring system which characterized in that includes:
the well wall steel bar, the vibration measurement sensor and the vibration measurement instrument; wherein,
the well wall reinforcing steel bars comprise vertical reinforcing steel bars and annular reinforcing steel bars,
the vibration measuring sensors and the vibration measuring instruments are fixed at the lap joint of the vertical ribs and the annular ribs of the well wall, two vibration measuring sensors are linearly arranged on the same level at equal intervals, and the vibration measuring sensors are connected with the vibration measuring instruments through cables;
the well wall steel bar, the vibration measuring sensor and the vibration measuring instrument are poured in the well wall concrete, and a box door of the vibration measuring instrument is positioned on the surface of the well wall;
the vibration meter includes:
a box body processed by an iron plate or a steel plate with the thickness of 1.5 mm; the left side surface and the right side surface of the box body are respectively provided with three round holes with the diameter of 3cm, the bottom of the box body is provided with 2 round holes with the diameter of 2cm, the round holes are used for connecting instrument circuits and fixing the box body, and the front surface of the box body is provided with a built-in box door capable of being opened and closed reliably;
an asbestos foam heat insulation layer is arranged in the box body;
the vibration meter host and the matched explosion-proof lithium battery are placed in the box body, a glass cement seal is arranged at a hole of the wiring, and a lock is arranged at the box door.
9. The large diameter freezing vertical blasting vibration monitoring system of claim 8, wherein the vibration measuring sensor comprises:
directly leading out a signal wire from the inside of the sensor, performing waterproof insulation treatment at the wire outlet, and additionally arranging a protective hose outside the signal wire;
the sensor is internally packaged with insulating waterproof glue, a waterproof sealing ring is arranged at the joint of the upper cover and the lower cover of the sensor, and waterproof glue is packaged outside the sensor.
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| CN106948802B (en) * | 2017-03-07 | 2020-04-10 | 中国石油天然气集团公司 | Vibration damping method for drilling tool |
| CN107478524A (en) * | 2017-09-21 | 2017-12-15 | 武汉科技大学 | The experimental provision and its method that simulation oil storage tank responds under Blast Load effect |
| CN109695452B (en) * | 2019-01-07 | 2021-04-27 | 中国矿业大学 | Single-layer shaft capable of axially yielding and construction method thereof |
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