CN216954914U - Borehole stressmeter suitable for one hole multiple spot monitoring - Google Patents
Borehole stressmeter suitable for one hole multiple spot monitoring Download PDFInfo
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- CN216954914U CN216954914U CN202220397436.9U CN202220397436U CN216954914U CN 216954914 U CN216954914 U CN 216954914U CN 202220397436 U CN202220397436 U CN 202220397436U CN 216954914 U CN216954914 U CN 216954914U
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Abstract
The utility model relates to a drilling stress meter suitable for one-hole multipoint monitoring, and belongs to the technical field of coal mine rock burst stress monitoring. The drilling stressometer comprises a hydraulic pillow, wherein one end of the hydraulic pillow is connected with an oil pipe, an installation cross-shaped fork head is arranged on a lower pressing plate of an oil pipe connecting end of the drilling stressometer, an upper pressing plate and a lower pressing plate which are crescent are symmetrically arranged on the upper side and the lower side of the hydraulic pillow, two ends of the upper pressing plate and the lower pressing plate are respectively connected through a binding belt in a fastening mode, and a groove is formed in the middle of the top surface of the upper pressing plate along the length direction of the upper pressing plate. The borehole stress meter designed by the utility model has the advantages that the groove is formed in the upper pressure plate, a plurality of stress meters can be simultaneously placed in the same borehole, the oil inlet pipe of the inner stress meter can penetrate out of the groove on the outer stress meter, the pressure change of the hydraulic rams in the stress meters is collected by the external pressure collector through the oil inlet pipe, and the stress monitoring mode of one hole and multiple points is realized.
Description
Technical Field
The utility model relates to the technical field of coal mine rock burst stress monitoring, in particular to a drilling stress meter suitable for one-hole multi-point monitoring.
Background
Rock burst is a dynamic phenomenon characterized by sudden, sharp and violent damage of coal rock mass around mine roadways and stopes due to the instant release of deformation energy, and is essentially caused by the sudden release of a large amount of elastic energy. It often results in heavy casualties and significant economic losses.
At present, the main technology for monitoring rock burst on site in real time at home is a drilling stress monitoring technology, and most of common sensors are improved and developed based on a Gruez Glotzi pressure box, so that the hydraulic pillow type drilling stress meter can measure the deep part of a coal rock body. The stressometer comprises elastic hydraulic pressure pillow and the metal clamp plate that covers outward, and hydraulic pressure pillow rear end welding advances oil pipe, advances oil pipe other end welding and has quick-operation joint, can connect the three-way valve through quick-operation joint, and rethread three-way valve connection pressure collector and one-way manual pump connect earlier during the use. The installation adopts drilling to visit formula fixed mounting, with the stressometer propelling movement to the drilling of beating in, presses one-way manual pump, through advancing oil pipe to hydraulic ram pump income hydraulic oil, when the stress changes around the drilling, arouses the interior oil pressure change of hydraulic ram, converts oil pressure power to the signal of telecommunication through pressure collector again and monitors and the record.
The hydraulic pillow type borehole stressmeters are usually installed in a hole, only one stressmeter can be arranged in the hole, and each stressmeter can measure the stress condition of only one point. Although the borehole stress monitoring technology can monitor the stress change in real time, the monitoring technology can only be implemented near a roadway due to point monitoring, and the monitoring range is limited even if the distributed cloud picture of monitoring parameters can be obtained by supplementing data monitored by multiple points through an interpolation method. In order to obtain a wide change rule of a surrounding rock stress field, the stress of points at different positions and different depths needs to be monitored, and therefore a large number of drill holes at different positions and different depths need to be constructed in a roadway to monitor more surrounding rock stress changes. Due to the influence of underground construction conditions of the coal mine, the multi-point and multi-hole deep drilling construction consumes a large amount of manpower and material resources, and the production cost is increased.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model discloses a borehole stress meter suitable for one-hole multi-point monitoring, wherein a plurality of stress meters can be arranged in one borehole for monitoring, so that the problems of high cost and complex construction of the existing multi-point monitoring are solved.
The technical scheme adopted by the utility model is as follows: the drilling stressometer includes the hydraulic pressure pillow, the oil pipe is advanced in the one end connection of hydraulic pressure pillow, the upper and lower bilateral symmetry of hydraulic pressure pillow is provided with top board and the holding down plate that the cross-section is crescent, the both ends of top board and holding down plate are provided with the connecting hole respectively, connect through the ribbon, be provided with installation cross jaw on the holding down plate of the oil pipe link that advances of drilling stressometer, the top surface middle part of top board is opened flutedly along its length direction.
Furthermore, the upper side surface of the upper pressing plate is covered with a layer of arc protection plate, and the arc protection plate covers the groove.
Furthermore, the upper plate is symmetrically provided with 6 internal thread connecting holes at two sides of the groove, 6 sinking connecting holes are correspondingly formed in the arc protection plate, and the arc protection plate penetrates through the corresponding connecting holes through 6 sunk screws to be connected and fixed with the upper plate.
Furthermore, borehole stressometers are provided with a one-way manual hydraulic pump and a multi-joint pressure collector, the multi-joint pressure collector is provided with a plurality of three-way valve joints, and the multi-joint pressure collector is connected with an oil inlet pipe of the borehole stressometers and an oil conveying pipeline of the one-way manual hydraulic pump through the three-way valve joints.
Compared with the prior art, the drilling hole stress meter suitable for one-hole multipoint monitoring, which is disclosed by the utility model, has the advantages that: the upper pressure plate of the stress meter is provided with a groove along the length direction, when the stress meter is applied, the depth of a drilled hole can be prolonged, a plurality of stress meters are arranged according to the requirement of monitoring the depth in the drilled hole, an oil inlet pipe of the stress meter on the inner side of the drilled hole can sequentially penetrate through the grooves in the stress meters on the outer side of the drilled hole, and the drilled hole is penetrated out and then connected with a pressure collector, so that a multi-point monitoring mode of one hole is realized, multi-point and multi-hole deep drilling construction required by multi-point monitoring of a coal mine tunnel is reduced, the drilling engineering quantity is reduced, and the monitoring cost is reduced. The groove of the stress meter upper pressing plate is covered with a layer of arc protection plate, so that an oil pipe in the groove can be effectively protected, the oil pipe is prevented from being damaged due to deformation of a drilled hole, and the arc protection plate is connected through a countersunk screw to ensure that the outer side surface of the arc protection plate is in full contact with the wall of the drilled hole.
Drawings
Fig. 1 is a schematic front sectional structure diagram of a borehole stress meter suitable for one-hole multi-point monitoring.
Fig. 2 is a schematic top view of a borehole strain gauge suitable for one-hole multi-point monitoring.
FIG. 3 is a schematic cross-sectional structure diagram of a borehole stress gauge suitable for one-hole multi-point monitoring
Fig. 4 is a schematic diagram of an application of a borehole stress gauge suitable for one-hole multi-point monitoring.
In the figure, a hydraulic pillow 1, an oil inlet pipe 2, an upper pressure plate 3, a lower pressure plate 4, an arc protection plate 5, a binding belt 6, a cross-shaped mounting head 7, a multi-joint pressure collector 8, a manual hydraulic pump 9, a groove 31, a countersunk head screw 51 and a three-way valve connector 81 are arranged.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described, and the described embodiments are only some, but not all, of the inventive embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.
As shown in fig. 1, 2 and 3, the utility model discloses an embodiment of a borehole stress meter suitable for one-hole multipoint monitoring, wherein the borehole stress meter comprises a hydraulic ram 1, and one end of the hydraulic ram 1 is connected with an oil inlet pipe 2. The upper and lower bilateral symmetry of hydraulic pillow 1 is provided with top board 3 and lower pressure plate 4 that the cross-section is crescent, and the both ends of top board 3 and lower pressure plate 4 are connected through ribbon 6 respectively, and the both ends of being close to of top board 3 and lower pressure plate 4 are opened the connecting hole that runs through respectively, and the ribbon 6 at both ends passes the corresponding connecting hole in top board 3 and lower pressure plate 4 both ends respectively and connects fixedly. The lower pressure plate 4 at the connecting end of the oil inlet pipe 2 of the borehole stressometer is provided with a mounting cross-shaped fork head 7.
The middle part of the top surface of the upper pressure plate 3 is provided with a groove 31 along the length direction, the cross section of the groove 31 is arc-shaped, and the inner diameter is larger than the outer diameter of the oil inlet pipe 2. The upper side surface of the upper press plate 3 is covered with a layer of arc protection plate 5, and the arc protection plate 5 covers the groove 31 of the upper press plate 3. Two sides of two ends of the arc protection plate 5 are respectively provided with a notch, and the two binding belts 6 penetrate through the notches at two sides of the arc protection plate 5.
The symmetrical equipartition in recess 31 of top board 3 both sides has opened 6 female connection holes, and corresponding division has 6 connecting holes that sink on circular arc guard plate 5, and circular arc guard plate 5 passes through corresponding connecting hole through 6 countersunk screw 51 and is connected fixedly with top board 3.
As shown in fig. 4, when in use, the borehole stressometer is provided with a unidirectional manual hydraulic pump 9 and a multi-joint pressure collector 8, the multi-joint pressure collector 8 is provided with a plurality of three-way joints 81, and the multi-joint pressure collector 8 is connected with the oil inlet pipe 2 of the borehole stressometer and the oil injection pipeline of the manual hydraulic pump 9 through the three-way joints 81.
When the hydraulic sleeper is installed, a traditional common borehole stressometer is pushed to a preset depth at the innermost end of a borehole by a push rod, an oil inlet pipe of the hydraulic sleeper is pushed and straightened, a one-way manual hydraulic pump is used for filling oil to the hydraulic sleeper through an oil supply pipeline, a three-way valve joint of a pressure collector and the oil inlet pipe, and the hydraulic sleeper expands to jack up an upper pressing plate and a lower pressing plate and is fully attached to the borehole. The oil inlet pipe of the hydraulic pillow of the ordinary borehole stressometer is arranged in the groove of the upper pressure plate of the borehole stressometer, and then the oil inlet pipe is covered on the groove by the arc protection plate and is connected and fastened by 6 sunk screws. The drilling stress meter is pushed to a preset depth by a push rod, an oil inlet pipe of the hydraulic ram is pushed and straightened at the same time, the hydraulic ram is filled with oil by a one-way manual pump through an oil supply pipeline, a three-way valve joint of a pressure collector and the oil inlet pipe, and the hydraulic ram expands to jack up the upper pressing plate and the lower pressing plate, so that the drilling stress meter is fully attached to a drill hole. By analogy, two or more borehole stressometers disclosed by the utility model can be combined with a common borehole stressometer in one borehole, and the combination can be installed to form one-hole double-drill or one-hole multi-drill.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the scope of the utility model, which is defined by the appended claims and the description of the utility model.
Claims (4)
1. The utility model provides a drilling stressometer suitable for monitoring of a hole multiple spot, drilling stressometer includes the hydraulic pressure pillow, the oil pipe is advanced in the one end connection of hydraulic pressure pillow, a serial communication port, the upper and lower bilateral symmetry of hydraulic pressure pillow is provided with the top board and the holding down plate of crescent, the both ends of top board and holding down plate are provided with the connecting hole respectively, connect through the ribbon, drilling stressometer advances to be provided with installation cross jaw on the holding down plate of oil pipe link, the top surface middle part of top board is opened flutedly along its length direction.
2. The borehole stress meter suitable for one-hole multipoint monitoring according to claim 1, wherein the upper side surface of the upper pressure plate is covered with a circular arc protection plate, and the circular arc protection plate covers the groove.
3. The borehole stress meter suitable for one-hole multipoint monitoring according to claim 2, wherein the upper pressure plate is symmetrically provided with 6 internal thread connecting holes at two sides of the groove, 6 sinking connecting holes are correspondingly formed in the arc protection plate, and the arc protection plate is fixedly connected with the upper pressure plate through the corresponding connecting holes by 6 sunk screws.
4. The borehole stress gauge suitable for one-hole multipoint monitoring according to claim 3, characterized in that the borehole stress gauge is provided with a one-way manual hydraulic pump and a multi-joint pressure collector, the multi-joint pressure collector is provided with a plurality of three-way valve joints, and the multi-joint pressure collector is connected with an oil inlet pipe of the borehole stress gauge and an oil delivery pipeline of the one-way manual hydraulic pump through the three-way valve joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220397436.9U CN216954914U (en) | 2022-02-25 | 2022-02-25 | Borehole stressmeter suitable for one hole multiple spot monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220397436.9U CN216954914U (en) | 2022-02-25 | 2022-02-25 | Borehole stressmeter suitable for one hole multiple spot monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216954914U true CN216954914U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220397436.9U Active CN216954914U (en) | 2022-02-25 | 2022-02-25 | Borehole stressmeter suitable for one hole multiple spot monitoring |
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| Country | Link |
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| CN (1) | CN216954914U (en) |
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- 2022-02-25 CN CN202220397436.9U patent/CN216954914U/en active Active
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