CN113188699A - Protected layer stress monitoring device based on protected layer exploitation - Google Patents
Protected layer stress monitoring device based on protected layer exploitation Download PDFInfo
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- CN113188699A CN113188699A CN202110533298.2A CN202110533298A CN113188699A CN 113188699 A CN113188699 A CN 113188699A CN 202110533298 A CN202110533298 A CN 202110533298A CN 113188699 A CN113188699 A CN 113188699A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0004—Force transducers adapted for mounting in a bore of the force receiving structure
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Abstract
The invention discloses a protected layer stress monitoring device based on protected layer mining, which relates to the technical field of protected layer stress monitoring, wherein when a stress monitoring assembly is used for stress monitoring, a telescopic rod is controlled to extend and drive a flexible hydraulic bag to just contact with a hole wall, then the telescopic rod is finely adjusted to contract, an expansion gap is reserved between the flexible hydraulic bag and the hole wall, so that quantitative liquid is filled in the flexible hydraulic bag to realize quantitative expansion, and dynamic stress change is transmitted to a stress sensor in an optimal state, in addition, at least four groups of telescopic rods are arranged in a circumferential array in a monitoring pipe, the extending end of each telescopic rod is provided with the flexible hydraulic bag and the stress sensor, so that stress monitoring is carried out from at least four directions, multi-direction monitoring is realized, the accuracy of stress monitoring is improved, and the monitoring pipe can be driven to quantitatively rotate slightly through a speed reduction driving mechanism, therefore, the monitoring direction of the device is adjusted, and the monitoring pertinence of the device is improved.
Description
Technical Field
The invention relates to the technical field of protected layer stress monitoring, in particular to a protected layer stress monitoring device based on protected layer mining.
Background
A shield layer refers to a coal or mineral seam that has been previously mined to eliminate or mitigate the risk of outburst or rock burst of adjacent coal seams, wherein, the gas pressure and the gas content of the outburst coal seam are greatly reduced due to mining influence, the air permeability of the coal seam is obviously improved, and a great amount of high-pressure gas is released so as to eliminate the outburst danger of the outburst coal seam, so that mining the protective layer is one of the most effective means for regional gas control, in addition, when the protective layer is researched to be mined, the stress change of the protected layer has important significance for searching the stress change rule, the stress monitoring device of the existing protected layer needs to adopt a stress sensor for stress monitoring, in order to capture the stress changes exactly, stress monitoring is often performed by using a combination of a flexible hydraulic bladder and a stress sensor, however, the expansion state of the flexible hydraulic bladder is difficult to control, resulting in poor transmission of stress variations.
Therefore, it is necessary to provide a device for monitoring the stress of a protected layer based on the exploitation of the protected layer to solve the problems mentioned in the background art.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a by protective layer stress monitoring devices based on protective layer exploitation which characterized in that: the method comprises the following steps:
the monitoring end of the stress monitoring component extends into the protected layer through the hole body to carry out real-time stress monitoring; and, the stress monitoring assembly includes at least:
the monitoring tube can perform micro-rotation adjustment along the axis of the monitoring tube;
the monitoring end includes:
the circumference monitoring subassembly, the embedding in the monitoring pipe, just, the circumference monitoring subassembly includes at least that can follow monitoring pipe radial slip and set up flexible hydraulic bag and the stress sensor in the installation storehouse, wherein flexible hydraulic bag and stress sensor's slip action is controlled by controller drive telescopic link, and utilizes when stress sensor carries out stress monitoring, by the real-time transmission stress dynamic change of flexible hydraulic bag, just the controller is configured into: when the stress is monitored, the telescopic rod is controlled to extend to drive the flexible hydraulic bag to just contact with the hole wall, and then the telescopic rod is slightly adjusted to contract, so that an expansion gap is reserved between the flexible hydraulic bag and the hole wall, and quantitative liquid is filled into the flexible hydraulic bag to realize quantitative expansion; and
and the axial monitor is arranged at the end part of the monitoring pipe by adopting a telescopic device and is used for detecting the bottom stress of the hole body.
Preferably, the installation bin is fixedly embedded in a monitoring pipe, four groups of telescopic rods are arranged in the monitoring pipe in a circumferential array at least, and the extending end of each telescopic rod is provided with a flexible hydraulic bag and a stress sensor so as to monitor stress from at least four directions.
Further, as a preferred option, in an initial stage, the flexible hydraulic bag is hidden in the installation bin, and a through hole for the flexible hydraulic bag to extend out is correspondingly formed in a bin wall of the installation bin.
Further, as preferred, flexible hydraulic pressure bag is the oval closed utricule of a level placement, and its two major axis ends are rigidity portion, and two stub axle ends are flexible portion, and the flexible portion that is close to telescopic link one side is connected with the adapter sleeve, adapter sleeve detachable links to each other with the output of telescopic link, and still embeds in the adapter sleeve has stress sensor.
Further, it is preferable that the rigid portion is of a hook type so that when the flexible hydraulic bladder is supported by the support spring, one end of the support spring is in contact with the flexible portion on the side away from the extendable rod and the other end is in contact with the rigid portion.
Further, as preferred, be located in the monitoring pipe the top of circumference monitoring subassembly has still been embedded into and has been fixed a position the locking bag, fixed a position the locking bag and set up in the reaming, the reaming is embedded reaming, and imbeds in the hole body middle part, the reaming is seted up in the roof and is contacted by the top of protective layer.
Further, as preferred, the location locking bag is the oval closed utricule that a level was placed, and its two stub axles are moulding portion, and moulding portion middle part adopts moulding pole as the support, and its two stub axles are the inflation portion for inflation and location locking are in the reaming.
Further, preferably, the monitoring pipe is rotatably arranged in a bearing seat, the top of the monitoring pipe penetrates through the bearing seat to extend into the transmission bin, and the monitoring pipe is driven by a speed reduction driving mechanism in the transmission bin.
Further, as a preferred option, the external circumference of the transmission bin is provided with a plurality of centralizing claws for centralizing on a centralizing ring, and the centralizing ring is coaxially fixed above the hole body.
Further, as preferred, location locking bag and flexible hydraulic pressure bag are equallyd divide and are adopted hydraulic control pipe and outside hydraulic controller to link to each other, and hydraulic control pipe passes the transmission storehouse and integrated reason line head along the axial of monitoring pipe, integrated reason line head is fixed in the top of transmission storehouse.
Compared with the prior art, the invention provides a protected layer stress monitoring device based on protective layer mining, which has the following beneficial effects:
in the embodiment of the invention, when the stress monitoring component is used for monitoring the stress, the telescopic rod is controlled to extend and drive the flexible hydraulic bag to just contact with the hole wall, then the telescopic rod is finely adjusted to contract, so that an expansion gap is left between the flexible hydraulic bag and the hole wall, so that quantitative liquid is filled in the flexible hydraulic bag to realize quantitative expansion, thereby transmitting the stress dynamic change to the stress sensor in an optimal state, in addition, at least four groups of telescopic rods are arranged in the monitoring pipe in a circumferential array, the extending end of each telescopic rod is provided with a flexible hydraulic bag and a stress sensor, so as to monitor the stress from at least four directions, realize multi-direction monitoring, improve the accuracy of stress monitoring, and can drive the monitoring pipe through speed reduction actuating mechanism and carry out the ration and rotate a little to adjust its monitoring position, improved the pertinence of its monitoring.
Drawings
FIG. 1 is a schematic overall structure diagram of a protected layer stress monitoring device based on the exploitation of a protected layer;
FIG. 2 is a schematic diagram of a stress monitoring assembly in a protected formation stress monitoring apparatus based on the exploitation of a protective formation;
FIG. 3 is a schematic diagram of a circumferential monitoring assembly in a overburden stress monitoring device based on overburden mining;
FIG. 4 is a schematic structural diagram of a telescopic rod and a flexible hydraulic bag in a protected layer stress monitoring device based on the protection layer mining;
in the figure: 1. a protective layer; 2. a protected layer; 3. a stress monitoring assembly; 4. a top plate; 5. a porous body; 6. reaming; 7. a righting ring; 31. a transmission bin; 32. a bearing seat; 33. monitoring the pipe; 34. a circumferential monitoring assembly; 35. a retractor; 36. an axial monitor; 37. a hydraulic control tube; 38. integrating wire arranging heads; 39. a righting claw; 310. a molding part; 311. an expansion part; 341. installing a bin; 342. a telescopic rod; 343. a flexible hydraulic bladder; 344. a through hole; 345. a stress sensor; 3421. a mounting seat; 3422. a lead screw; 3423. a nut seat; 3424. a slide base; 3431. a flexible portion; 3432. a rigid portion; 3433. a support spring; 3434. a connecting sleeve.
Detailed Description
Referring to fig. 1 to 4, in an embodiment of the present invention, a device for monitoring stress of a protected layer based on protection layer mining includes:
the monitoring end of the stress monitoring component 3 extends into the protected layer 2 through the hole body 5 to carry out real-time stress monitoring; and, the stress monitoring assembly includes at least:
a monitoring tube 33 capable of micro-rotational adjustment along its own axis;
the monitoring end includes:
a circumferential monitoring assembly 34 embedded in the monitoring pipe 33, wherein the circumferential monitoring assembly 34 at least comprises a flexible hydraulic bladder 343 and a stress sensor 345, which are capable of sliding radially along the monitoring pipe 33 and are disposed in the mounting bin 341, wherein the sliding motion of the flexible hydraulic bladder 343 and the stress sensor 345 is controlled by a controller driving the telescopic rod 342, and when the stress sensor 345 is used for stress monitoring, the flexible hydraulic bladder 343 transmits stress dynamic changes in real time, and the controller is configured to: during stress monitoring, the telescopic rod 342 is controlled to extend and drive the flexible hydraulic bag to just contact with the hole wall, and then the telescopic rod 342 is finely adjusted to contract, so that an expansion gap is reserved between the flexible hydraulic bag and the hole wall, so that quantitative liquid is filled in the flexible hydraulic bag, quantitative expansion is realized, otherwise, the following two conditions can occur: 1. the gap between the flexible hydraulic bag and the hole wall is too small, when the flexible hydraulic bag is not expanded to a standard state, the internal pressure is too large, which is not beneficial to responding to subsequent stress transmission, even if the pressure in the flexible hydraulic bag reaches a fixed value, the extrusion deformation process is too large, which easily causes problems to the subsequent stress transmission, 2, the gap between the flexible hydraulic bag and the hole wall is too large, so that even if the pressure in the flexible hydraulic bag reaches the fixed value, the flexible hydraulic bag can not be fully contacted with the hole wall, and still can not respond to the subsequent stress transmission, in addition, it needs to be explained that whether the flexible hydraulic bag is just contacted with the hole wall can be measured by using the stress sensor, and the quantitative expansion of the flexible hydraulic bag is beneficial to transmitting the dynamic change of the stress to the stress sensor in an optimal state, and the specific structure of the telescopic rod 342 is as shown in figure 4, the device comprises a mounting seat 3421, wherein a lead screw 3422 is rotatably arranged in the mounting seat 3421, the rotating action of the lead screw is driven by an external motor, a nut seat 3423 is rotatably arranged on the lead screw, the nut seat 3423 is connected with a sliding seat 3424, the sliding seat 3424 is arranged on the mounting seat 3421 in a limiting and sliding manner, and the end part of the sliding seat is connected with a connecting sleeve 3434; and
and an axial monitor 36 arranged at the end of the monitoring pipe 33 by using a telescopic device 35 and used for detecting the bottom stress of the hole body 5.
As a preferred embodiment, as shown in fig. 3, the installation bin 341 is fixedly embedded in the monitoring pipe 33, and at least four sets of telescopic rods 342 are arranged in a circumferential array in the monitoring pipe 33, and an extending end of each telescopic rod 342 is provided with a flexible hydraulic bag 343 and a stress sensor 345, so as to perform stress monitoring from at least four directions, thereby realizing multi-directional monitoring and improving the accuracy of stress monitoring.
In a preferred embodiment, in an initial stage, the flexible hydraulic bag 343 is hidden in the installation chamber 341, and a through hole 344 for the flexible hydraulic bag 343 to extend out is correspondingly formed on a chamber wall of the installation chamber 341.
As a preferred embodiment, as shown in fig. 4, the flexible hydraulic bladder 343 is a horizontally disposed oval closed bladder body, two long shaft ends of which are rigid portions 3432, two short shaft ends of which are flexible portions 3431, the flexible portion near one side of the telescopic rod is connected with a connecting sleeve 3434, the connecting sleeve 3434 is detachably connected with the output end of the telescopic rod 342, and a stress sensor 345 is embedded in the connecting sleeve 3434.
As a preferred embodiment, the rigid part 3432 is of a hook type, so that when the flexible hydraulic bladder 343 is supported by the supporting spring 3433, one end of the supporting spring 3433 contacts with the flexible part 3431 on the side away from the telescopic rod, and the other end contacts with the rigid part 3432, and the arrangement is such that the flexible hydraulic bladder can maintain a certain shape by the rigid part and the supporting spring, that is, even in the initial stage, the flexible hydraulic bladder can still take the shape of an oval closed bladder, thereby well protecting the stress sensor from damage.
In this embodiment, lie in the monitoring pipe 33 the top of circumference monitoring subassembly 34 has still been embedded into the location locking bag, the location locking bag sets up in reaming 6, reaming 6 is embedded reaming, and imbeds at the hole body 5 middle part, the reaming is seted up in roof 4 and is contacted by the top of protective layer 2, needs to explain that reaming 6 can adopt reamer bit to ream to this reamer bit is reducing reamer bit, thereby can realize only implementing partial reaming in the hole body 5, and it is long when so reducible a large amount of reams, improved reaming efficiency.
In addition, the location locking bag is the oval closed utricule that a level was placed, and its two stub axles are moulding portion 310, and moulding portion middle part adopts moulding pole as the support, and its two stub axles are inflation portion 311 for inflation and location locking are in reaming 6 to can effectually fix a position the locking of monitoring pipe 33 in the cavern body 5, reduced the slip casting and strengthened step, and be favorable to subsequent recovery and recycle.
In this embodiment, monitoring pipe 33 rotates and sets up in bearing frame 32, just monitoring pipe 33's top is passed bearing frame 32 and is stretched into to transmission storehouse 31, and is driven by the speed reduction actuating mechanism in transmission storehouse 31, speed reduction actuating mechanism can be the combination of speed reducer and gear train, wherein, the gear train includes driving gear and driven gear, driven gear is coaxial to be fixed on monitoring pipe 33, driven gear meshes with the driving gear mutually, the output at speed reduction actuating mechanism is fixed to the driving gear, and can drive monitoring pipe 33 through speed reduction actuating mechanism and carry out quantitative micro-rotation, thereby adjust its monitoring position, the pertinence of its monitoring has been improved.
In this embodiment, in order to further reinforce the monitoring pipe, the external circumferential array of the transmission chamber 31 has a plurality of centering claws 39 for centering on the centering ring 7, and the centering ring 7 is coaxially fixed above the hole body 5.
In this embodiment, the positioning locking bag and the flexible hydraulic bag 343 are respectively connected to an external hydraulic controller by using a hydraulic control pipe 37, the hydraulic control pipe 37 passes through the transmission bin and the integrated wire management head 38 along the axial direction of the monitoring pipe 33, and the integrated wire management head 38 is fixed above the transmission bin.
In specific implementation, before the protective layer 1 is mined, the earth surface is constructed by a drilling machine, and after the hole body 5 enters the protected layer 2, the construction is stopped; at this time, the middle part of the hole body 5 is reamed by using a reamer, and then a stress monitoring assembly is put into the hole body, wherein a plurality of righting claws 39 are arrayed on the outer circumference of the transmission bin 31 and used for righting on the righting ring 7; and, utilize the location locking bag to fix a position the locking in the body 5 of hole with monitoring pipe 33, having reduced the slip casting and having consolidated the step, and be favorable to subsequent recovery and reuse, when the stress monitoring, control telescopic link 342 extension earlier and drive flexible hydraulic bag just to contact with the pore wall, telescopic link 342 fine setting shrink afterwards for leave the inflation clearance between flexible hydraulic bag and the pore wall, so that fill quantitative liquid in flexible hydraulic bag, realize quantitative inflation, thereby transmit stress dynamic change to the stress sensor through flexible hydraulic bag, the stress sensor can be through wired or wireless transmission's mode with stress data transmission to control center.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. The utility model provides a by protective layer stress monitoring devices based on protective layer exploitation which characterized in that: the method comprises the following steps:
the monitoring end of the stress monitoring component (3) extends into the protected layer (2) through the hole body (5) to monitor the stress in real time; and, the stress monitoring assembly includes at least:
a monitoring tube (33) capable of making a micro-rotation adjustment along its own axis;
the monitoring end includes:
a circumferential monitoring assembly (34) embedded in the monitoring pipe (33), wherein the circumferential monitoring assembly (34) at least comprises a flexible hydraulic bladder (343) and a stress sensor (345) which can slide along the monitoring pipe (33) in the radial direction and are arranged in the installation bin (341), the sliding motion of the flexible hydraulic bladder (343) and the stress sensor (345) is controlled by a controller driving a telescopic rod (342), and when the stress sensor (345) is used for stress monitoring, the dynamic stress change is transmitted by the flexible hydraulic bladder (343) in real time, and the controller is configured to: when the stress is monitored, the telescopic rod (342) is controlled to extend and drive the flexible hydraulic bag to just contact with the hole wall, and then the telescopic rod (342) is finely adjusted to contract, so that an expansion gap is reserved between the flexible hydraulic bag and the hole wall, and quantitative liquid is filled into the flexible hydraulic bag to realize quantitative expansion; and
and an axial monitor (36) which is arranged at the end part of the monitoring pipe (33) by adopting a telescopic device (35) and is used for detecting the bottom stress of the hole body (5).
2. The protected zone stress monitoring device based on the protected zone mining of claim 1, wherein: the installation bin (341) is fixedly embedded in a monitoring pipe (33), at least four groups of telescopic rods (342) are arranged in the monitoring pipe (33) in a circumferential array mode, and the extending end of each telescopic rod (342) is provided with a flexible hydraulic bag (343) and a stress sensor (345) so as to monitor stress from at least four directions.
3. The protected zone stress monitoring device based on the protected zone mining of claim 1, wherein: in the initial stage, the flexible hydraulic bag (343) is hidden in the installation bin (341), and a through hole (344) for the flexible hydraulic bag (343) to extend out is correspondingly formed in the bin wall of the installation bin (341).
4. The protected zone stress monitoring device based on the protected zone mining of claim 1, wherein: the flexible hydraulic bag (343) is an oval closed bag body placed horizontally, two long shaft ends of the flexible hydraulic bag are rigid parts (3432), two short shaft ends of the flexible hydraulic bag are flexible parts (3431), the flexible parts close to one side of the telescopic rod are connected with a connecting sleeve (3434), the connecting sleeve (3434) is detachably connected with the output end of the telescopic rod (342), and a stress sensor (345) is embedded in the connecting sleeve (3434).
5. The protected zone stress monitoring device based on the protected zone mining of claim 4, wherein: and the rigid part (3432) is hook-shaped so that when the flexible hydraulic bag (343) is supported by the support spring (3433), one end of the support spring (3433) is in contact with the flexible part (3431) on the side away from the telescopic bar and the other end is in contact with the rigid part (3432).
6. The protected zone stress monitoring device based on the protected zone mining of claim 1, wherein: the monitoring pipe (33) is positioned above the circumferential monitoring assembly (34) and is further embedded with a positioning locking bag, the positioning locking bag is arranged in a reaming hole (6), the reaming hole (6) is an embedded reaming hole and is embedded in the middle of a hole body (5), and the reaming hole is arranged in a top plate (4) and is in contact with the top of a protected layer (2).
7. The protected zone stress monitoring device based on the protected zone mining of claim 6, wherein: the location locking bag is the oval closed utricule that a level was placed, and its two stub axles are moulding portion (310), and moulding portion middle part adopts moulding pole as the support, and its two stub axles are inflation portion (311) for inflation and location locking are in reaming (6).
8. The protected zone stress monitoring device based on the protected zone mining of claim 1, wherein: the monitoring pipe (33) is rotatably arranged in the bearing seat (32), the top of the monitoring pipe (33) penetrates through the bearing seat (32) to extend into the transmission bin (31), and the monitoring pipe is driven by a speed reduction driving mechanism in the transmission bin (31).
9. The protected zone stress monitoring device based on the protected zone mining of claim 8, wherein: the outer circumference array of transmission storehouse (31) has a plurality of righting claws (39), is used for righting on righting ring (7), righting ring (7) coaxial fastening is in the top of hole body (5).
10. A protected zone stress monitoring apparatus based on protected zone mining as claimed in claim 1 or claim 6, wherein: the positioning locking bag and the flexible hydraulic bag (343) are respectively connected with an external hydraulic controller through a hydraulic control pipe (37), the hydraulic control pipe (37) penetrates through the transmission bin and the integrated wire arranging head (38) along the axial direction of the monitoring pipe (33), and the integrated wire arranging head (38) is fixed above the transmission bin.
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| CN202110533298.2A CN113188699B (en) | 2021-05-17 | 2021-05-17 | Protected layer stress monitoring device based on protected layer exploitation |
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| CN202110533298.2A CN113188699B (en) | 2021-05-17 | 2021-05-17 | Protected layer stress monitoring device based on protected layer exploitation |
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| CN117250179A (en) * | 2023-07-27 | 2023-12-19 | 中国地质科学院矿产资源研究所 | Mobile Raman detection system and method for field site |
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