CN210264825U - Device for identifying rock properties of coal mine tunnel roof - Google Patents
Device for identifying rock properties of coal mine tunnel roof Download PDFInfo
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- CN210264825U CN210264825U CN201921047573.4U CN201921047573U CN210264825U CN 210264825 U CN210264825 U CN 210264825U CN 201921047573 U CN201921047573 U CN 201921047573U CN 210264825 U CN210264825 U CN 210264825U
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Abstract
The utility model provides a device for identifying the rock property of a roof of a coal mine tunnel, which comprises a torque and rotating speed sensor, a displacement sensor, a force sensor, a bolting machine, a PDC drill bit, a drill rod and a controller; and according to broken rock through the PDC drill bit, the back acquires moment of torsion and tachometric sensor, displacement sensor, force transducer's data, and acquire the energy that bores the rock drilling needs of digging unit volume with the leading-in formula of data, through the utility model discloses a measuring device, acquire moment of torsion and tachometric sensor, displacement sensor, the parameter when force transducer sensing creeps into the rock, judge the unipolar compressive strength of rock, discern corresponding roof stratum weak intermediate layer thickness, measuring device direct mount directly links in pneumatic roofbolter and drilling rod, easy operation, convenient to use, can strut before the roof, effectively discern whether its roof has weak intermediate layer hidden danger, can practice thrift a large amount of manpower and materials, furthest's protection people's the property safety.
Description
Technical Field
The utility model belongs to the technical field of the coal mining technique and specifically relates to a device that is arranged in the coal resource exploitation in-process, is used for discernment to judge a discernment coal mine tunnel roof rock property of the weak intermediate layer nature in colliery.
Background
Coal is a basic energy source in China, and is promoted by the rapid development of national economy in recent years, the yield and sales of coal in China are rapidly increasing, and in the coal mining process, the roadway roof needs to be paid to ensure the safety of underground operators and equipment, so that in the coal mining process, the identification of the rock property of the coal mine roadway roof is of vital importance, if the lithology of the roof cannot be found in time, and the roadway support design cannot be changed in time along with the change of the lithology of the roof, in the prior art, the frequently occurring problem is that the support strength is insufficient or too strong, the support strength can cause weak interlayer accidents, and the support strength is excessive, so that the waste of manpower and material resources can be caused.
At present, whether judge the tunnel roof and have weak intermediate layer hidden danger mainly is through getting the core to the roof rock and judging, and this kind of mode utilizes the rock to get the core after carrying out pneumatic jumbolter drilling, then carries out manual analysis, has the cycle length, gets the shortcoming such as the arrangement of core point has the limitation.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned background art expounded, the utility model aims to solve the technical problem that a discernment coal mine tunnel roof rock property's device has been solved to in the coal mining, the technical problem of tunnel roof lithology prejudgement fast.
In order to achieve the above object, the utility model provides a following technical scheme:
a device for identifying the rock property of a roof of a coal mine roadway comprises a torque and rotating speed sensor, a displacement sensor, a force sensor, an anchor rod machine, a PDC drill bit, a drill rod and a controller;
displacement sensor one end is fixed at the landing leg afterbody of roofbolter, and the landing leg upper portion at the roofbolter is fixed to one end in addition, the landing leg upper portion at the roofbolter is fixed to the controller, the PDC drill bit is installed on drilling rod A, and the moment of torsion is connected with speed sensor and drilling rod B, and pneumatic roofbolter fixed connection drilling rod B, force sensor passes through the mechanical joint connection of bolt and force sensor, and force sensor mechanical joint passes through bolt fixed connection with the roofbolter bottom.
In the technical scheme, the upper part of the torque and rotation speed sensor is a concave inner hexagonal prism, the inner hexagonal prism passes through the inner wall of the groove, the drill rod A is an outer hexagonal prism, the middle part of the torque and rotation speed sensor is a through hole, the lower part of the torque and rotation speed sensor is designed to be a convex outer hexagonal prism, and the torque and rotation speed sensor is connected with the concave inner hexagonal prism of the spindle of the pneumatic anchor rod drilling machine through the convex outer hexagonal prism of the rod.
In the above technical solution, the force sensor is disposed beside the displacement sensor.
In the technical scheme, a bridge type strain gauge is arranged on an inner shaft of the torque and rotation speed sensor, a conditioning circuit is arranged inside the outer sleeve, a base is arranged outside the outer sleeve, and the base is connected with the body of the anchor rod machine through an iron block.
In the technical scheme, the force sensor is connected with the force sensor support through threads, and the bottom of the force sensor support is a pointed joint.
In the technical scheme, the torque and rotating speed sensor, the displacement sensor and the force sensor are externally connected with the controller through cables.
In the technical scheme, the controller comprises a power module, a communication module, a data acquisition module, a data processing module, a data storage module and a wireless transmission module, the power module, the communication module, the data acquisition module, the data storage module and the wireless transmission module are connected with the data processing module, the data acquisition module is connected with a torque and rotation speed sensor, a displacement sensor and a force sensor, and the wireless transmission module transmits data stored in the data storage module to receiving equipment in a wireless communication mode.
A method for identifying the rock properties of a roof of a coal mine roadway comprises the following steps:
q1, breaking rock by PDC drill bit;
q2, acquiring data of the torque and rotation speed sensor, the displacement sensor and the force sensor, and importing the data into the following formula:
drilling consumed energy delta E in motor delta t time of anchor rod machine1
ΔE1＝FuΔt
In the formula: f is the feeding force of a feeding support leg cylinder; u is the feeding speed of the cylinder of the feeding support leg;
work delta E performed in delta t time of feeding pneumatic support leg2The following are calculated respectively:
ΔE2＝TMωMΔt
the energy of drilling the rock is:
ΔE＝ΔE1+ΔE2
the volume Δ V of rock broken by the borehole is:
ΔV＝uΔtAZ
in the formula AzThe cross-sectional area of the borehole, i.e. the energy W required to drill a unit volume of rock borehole, is:
therefore, the temperature of the molten steel is controlled,
wherein F is the feeding force of the pneumatic support leg of the jumbolter, F parameters are obtained through a force sensor, u parameters are obtained through a displacement sensor by obtaining the speed through time derivation, and TMParameters are obtained by torque and speed sensors and ωMThe parameters are obtained by a torque and rotating speed sensor, so that the drilling specific work and the corresponding uniaxial compressive strength of different rock stratums can be obtained.
The utility model discloses beneficial effect: through the utility model discloses a measuring device, acquire moment of torsion and speed sensor, displacement sensor, moment of torsion and rotation rate when force sensor sensing creeps into the rock, propulsion speed, thrust creeps into the parameter, judge the unipolar compressive strength of rock, discern corresponding roof rock stratum weak intermediate layer thickness, measuring device possesses data analysis's function, but direct mount directly links in pneumatic roofbolter and drilling rod, and the operation is thus simple, high durability and convenient use, can strut before the roof, whether there is weak intermediate layer hidden danger in its roof effectively discernment, can practice thrift a large amount of manpowers, furthest's the security of the lives and property of protection people.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a mechanical joint structure of a force sensor according to an embodiment of the present invention.
Fig. 3 is the utility model discloses the moment of torsion is connected the schematic diagram with rotational speed sensor and pneumatic roofbolter.
Fig. 4 is a schematic structural diagram of the constituent modules of the controller according to the present invention.
Wherein: the device comprises a top plate rock stratum 1, a torque and rotation speed sensor 2, an inner hexagonal prism 21, an outer hexagonal prism 22, a displacement sensor 3, a force sensor 4, a bolting machine 5, a supporting leg 51, a PDC drill bit 6, a controller 7, a drill rod A8, a drill rod B9, a base 10, an iron block 11 and a controller 12.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 4, as example 1: the utility model provides a device of discernment coal mine tunnel roof rock nature, includes moment of torsion and rotational speed sensor, displacement sensor, force transducer, roofer, PDC drill bit, drilling rod and controller.
The landing leg afterbody at the roofbolter is fixed to displacement sensor one end, and the landing leg upper portion at the roofbolter is fixed to one end in addition, and the landing leg upper portion at the roofbolter is fixed to the controller, and the PDC drill bit is installed on drilling rod A, and the moment of torsion is connected with speed sensor and drilling rod B, and pneumatic roofbolter fixed connection drilling rod B, force sensor pass through the bolt and be connected with force sensor's mechanical joint, and force sensor mechanical joint passes through bolt fixed connection with the roofbolter bottom. The upper part of the torque and rotation speed sensor is a concave inner hexagonal prism, the drill rod A is an outer hexagonal prism through the inner hexagonal prism of the inner wall of the groove, the middle part of the torque and rotation speed sensor is a through hole, the lower part of the torque and rotation speed sensor is a convex outer hexagonal prism, and the torque and rotation speed sensor is connected with the concave inner hexagonal prism of the spindle of the pneumatic anchor rod drilling machine through the convex outer hexagonal prism of the rod.
The force sensor is arranged beside the displacement sensor, the bridge type strain gauge is arranged in the inner shaft of the torque and rotation speed sensor, the conditioning circuit is arranged in the outer sleeve, the base is arranged outside the outer sleeve, and the base is connected with the body of the anchor rod machine through the iron block. The force sensor is connected with the force sensor support through threads, and the bottom of the force sensor support is a pointed joint. The torque and rotating speed sensor, the displacement sensor and the force sensor are externally connected with the controller through cables.
The controller comprises a power module, a communication module, a data acquisition module, a data processing module, a data storage module and a wireless transmission module, wherein the power module, the communication module, the data acquisition module, the data storage module and the wireless transmission module are respectively connected with the data processing module, the data acquisition module is connected with a torque and rotating speed sensor, a displacement sensor and a force sensor, and the wireless transmission module transmits data stored in the data storage module to receiving equipment in a wireless communication mode.
The method for identifying the rock property of the roof of the coal mine roadway by adopting the device comprises the following steps:
q1, breaking rock by PDC drill bit;
q2, acquiring data of the torque and rotation speed sensor, the displacement sensor and the force sensor, and importing the data into the following formula:
drilling consumed energy delta E in motor delta t time of anchor rod machine1
ΔE1＝FuΔt (1)
In the formula: f is the feeding force of a feeding support leg cylinder; u is the feeding speed of the cylinder of the feeding support leg;
work delta E performed in delta t time of feeding pneumatic support leg2The following are calculated respectively:
ΔE2＝TMωMΔt (2)
the energy of drilling the rock is:
ΔE＝ΔE1+ΔE2(3)
the volume Δ V of rock broken by the borehole is:
ΔV＝uΔtAZ
in the formula AzThe cross-sectional area of the borehole, i.e. the energy W required to drill a unit volume of rock borehole, is:
wherein F is the feeding force of the pneumatic support leg of the jumbolter, F parameters are obtained through a force sensor, u parameters are obtained through a displacement sensor by obtaining the speed through time derivation, and TMParameters are obtained by torque and speed sensors and ωMThe parameters are obtained by a torque and rotating speed sensor, so that the drilling specific work and the corresponding uniaxial compressive strength of different rock stratums can be obtained.
In the prior art, the properties of top rock are confirmed according to the drilling specific work of a rock sample, and are confirmed in textbooks, such as:
| rock name | Average uniaxial compressive strength (Mpa) of each rock stratum | Specific work of drilling (MJ. m)-3) |
| Limestone | 135.2 | 5.4 |
| Mudstone | 2.3 | 1.2 |
| Sandy mudstone | 57 | 2.5 |
But among the prior art, each parameter acquires complicacy, and the inaccuracy, and the unipolar compressive strength of judgement rock that can not be very accurate discerns corresponding roof rock stratum weak intermediate layer thickness, the utility model discloses a measuring device and method, direct mount directly link in pneumatic roofbolter and drilling rod, and the accurate directness can judge roof rock stratum weak intermediate layer thickness at the scene, have very important on-the-spot using value.
The above-mentioned embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered by 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 (7)
1. The utility model provides a device of discernment coal mine tunnel roof rock nature which characterized in that: the device comprises a torque and rotating speed sensor, a displacement sensor, a force sensor, a bolting machine, a PDC drill bit, a drill rod and a controller;
displacement sensor one end is fixed at the landing leg afterbody of roofbolter, and the landing leg upper portion at the roofbolter is fixed to one end in addition, the landing leg upper portion at the roofbolter is fixed to the controller, the PDC drill bit is installed on drilling rod A, and the moment of torsion is connected with speed sensor and drilling rod B, and pneumatic roofbolter fixed connection drilling rod B, force sensor passes through the mechanical joint connection of bolt and force sensor, and force sensor mechanical joint passes through bolt fixed connection with the roofbolter bottom.
2. The device for identifying the rock property of the roof of the coal mine roadway according to claim 1, wherein: the upper part of the torque and rotation speed sensor is a concave inner hexagonal prism, the inner hexagonal prism passes through the inner wall of the groove, the drill rod A is an outer hexagonal prism, the middle part of the torque and rotation speed sensor is a through hole, the lower part of the torque and rotation speed sensor is a convex outer hexagonal prism, and the torque and rotation speed sensor is connected with the concave inner hexagonal prism of the spindle of the pneumatic anchor rod drilling machine through the convex outer hexagonal prism of the rod.
3. An apparatus for identifying the rock properties of a roof of a coal mine roadway according to claim 1 or 2, wherein: the force sensor is arranged beside the displacement sensor.
4. The device for identifying the rock property of the roof of the coal mine roadway according to claim 3, wherein: a bridge type strain gauge is arranged on an inner shaft of the torque and rotation speed sensor, a conditioning circuit is arranged inside the outer sleeve, a base is arranged outside the outer sleeve, and the base is connected with the body of the anchor rod machine through an iron block.
5. The device for identifying the rock property of the roof of the coal mine roadway according to claim 4, wherein: the force sensor is connected with the force sensor support through threads, and the bottom of the force sensor support is a pointed joint.
6. The device for identifying the rock property of the roof of the coal mine roadway according to claim 5, wherein: the torque and rotating speed sensor, the displacement sensor and the force sensor are externally connected with the controller through cables.
7. The device for identifying the rock property of the roof of the coal mine roadway according to claim 6, wherein: the controller comprises a power module, a communication module, a data acquisition module, a data processing module, a data storage module and a wireless transmission module, wherein the power module, the communication module, the data acquisition module, the data storage module and the wireless transmission module are connected with the data processing module, the data acquisition module is connected with a torque and rotating speed sensor, a displacement sensor and a force sensor, and the wireless transmission module transmits data stored in the data storage module to receiving equipment in a wireless communication mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921047573.4U CN210264825U (en) | 2019-07-07 | 2019-07-07 | Device for identifying rock properties of coal mine tunnel roof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921047573.4U CN210264825U (en) | 2019-07-07 | 2019-07-07 | Device for identifying rock properties of coal mine tunnel roof |
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| Publication Number | Publication Date |
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| CN210264825U true CN210264825U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921047573.4U Active CN210264825U (en) | 2019-07-07 | 2019-07-07 | Device for identifying rock properties of coal mine tunnel roof |
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- 2019-07-07 CN CN201921047573.4U patent/CN210264825U/en active Active
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