CN114295492A - Rock mass multi-field coupling rotary cutting drilling test device and method - Google Patents
Rock mass multi-field coupling rotary cutting drilling test device and method Download PDFInfo
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- CN114295492A CN114295492A CN202111649777.7A CN202111649777A CN114295492A CN 114295492 A CN114295492 A CN 114295492A CN 202111649777 A CN202111649777 A CN 202111649777A CN 114295492 A CN114295492 A CN 114295492A
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- 239000011435 rock Substances 0.000 title claims abstract description 188
- 238000012360 testing method Methods 0.000 title claims abstract description 185
- 238000005553 drilling Methods 0.000 title claims abstract description 179
- 238000005520 cutting process Methods 0.000 title claims abstract description 49
- 230000008878 coupling Effects 0.000 title claims abstract description 34
- 238000010168 coupling process Methods 0.000 title claims abstract description 34
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 120
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 238000012544 monitoring process Methods 0.000 claims abstract description 29
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 9
- 238000010998 test method Methods 0.000 claims description 4
- 230000001808 coupling effect Effects 0.000 abstract description 10
- 230000026676 system process Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 5
- 230000003204 osmotic effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention provides a device and a method for testing multi-field coupling rotary cutting drilling of a rock mass. The rock multi-field coupling rotary cutting drilling test device comprises an external frame, a stress seepage application system, a temperature application system, a drilling machine system and a control monitoring system. The axial hydraulic oil cylinder applies axial confining pressure to the rock mass test piece, liquid enters the water containing cavity and then applies lateral confining pressure to the rock mass test piece, and the liquid penetrates through the permeable film to apply a seepage field to the rock mass test piece; the temperature applying system is used for applying a temperature field to the rock mass test piece; the drilling machine system penetrates through the reserved hole to carry out rotary cutting on the rock mass test piece; the control monitoring system processes the drilling data of the drill rod system, the rock mass multi-field coupling rotary cutting drilling test device can effectively reduce the stress, seepage and temperature environments borne by the on-site rock mass, and can obtain the drilling parameters of the rock mass under the multi-field coupling action of a stress field, a seepage field and a temperature field while drilling, so that the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass are obtained.
Description
Technical Field
The invention relates to the technical field of soil layer or rock drilling, in particular to a rock mass multi-field coupling rotary cutting drilling test device and method.
Background
With the rapid development of underground engineering, the engineering construction process often faces complex conditions of high stress, strong seepage, high temperature and the like, which cause the change of the physical and mechanical properties and stress state of the rock mass, and the research of the physical and mechanical properties of the rock mass under the stress-seepage-temperature multi-field coupling action is very important. The digital drilling testing technology utilizes the correlation between drilling parameters of drilling speed, drill bit rotating speed, drilling pressure and drilling torque and rock mass strength parameters, can realize the quick acquisition of strength parameters of rock mass such as equivalent compressive strength, equivalent cohesive force, equivalent internal friction angle and the like, greatly improves the testing efficiency, and can realize in-situ testing. However, at present, research on real-time acquisition of rock strength parameters under the rock stress-seepage-temperature multi-field coupling effect is not available, so that a rock stress-seepage-temperature multi-field coupling rotary cutting drilling test system and method need to be researched, the rock strength parameter evolution while drilling rule under the stress field-seepage field-temperature field coupling effect is researched, and theoretical and technical support is provided for in-situ acquisition of rock mechanics parameters under complex conditions.
Disclosure of Invention
The invention aims to provide a rock mass multi-field coupling rotary cutting drilling test device which can effectively reduce the stress, seepage and temperature environments borne by a field rock mass and can acquire drilling parameters of the rock mass under the multi-field coupling action of a stress field, a seepage field and a temperature field while drilling so as to obtain the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass.
The invention also provides a method for testing the rotary cutting of the rock mass drilling.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
according to one aspect of the invention, a rock mass multi-field coupling rotary cutting drilling testing device is provided. The rock mass multi-field coupling rotary cutting drilling test device is applied to rotary cutting drilling test of a rock mass test piece and comprises an external frame, a stress seepage application system, a temperature application system, a drilling machine system and a control monitoring system. The external frame comprises a test platform, and a side wall and an upper seat which are respectively arranged on the test platform, wherein the upper seat is provided with a preformed hole; the stress seepage application system comprises an axial confining pressure application assembly and a seepage application assembly, the confining pressure application assembly comprises a base and an axial hydraulic oil cylinder connected to the base, the side wall, the upper seat and the base are surrounded to form a pressure chamber for placing the rock test piece, the axial hydraulic oil cylinder applies axial confining pressure to the rock test piece to keep the rock test piece not to move, the seepage application assembly comprises a permeable film, the permeable film is attached to the outer wall of the rock test piece and is surrounded with the side wall to form a water containing cavity, so that liquid enters the water containing cavity and then applies lateral confining pressure to the rock test piece, and the liquid passes through the permeable film to apply a seepage field to the rock test piece; the temperature applying system is used for applying a temperature field to the rock mass test piece; the drilling machine system comprises a drilling machine propelling assembly and a drilling machine assembly which are arranged above the upper seat, the drilling machine assembly penetrates through the reserved hole to carry out rotary cutting on the rock mass test piece, and the drilling machine propelling assembly is connected to one end, far away from the rock mass test piece, of the drilling machine assembly so as to drive the drilling machine assembly to drill; the control monitoring system comprises a control unit and a monitoring unit, the monitoring unit comprises a torque sensor arranged on the drilling machine component and a pressure sensor arranged on the drilling machine propelling component, the torque sensor and the pressure sensor are respectively and electrically connected with the control unit so as to process drilling data of the drilling machine system, and the stress seepage flow applying system, the temperature applying system and the drilling machine system are respectively and electrically connected with the control unit.
According to an embodiment of the present invention, the drill propelling assembly includes a first servo motor, a threaded rod and a drill frame for mounting the drill assembly, the first servo motor is connected to the outer frame, the threaded rod is connected to the first servo motor, the drill frame is in threaded connection with the threaded rod to convert the rotary motion of the threaded rod into the linear motion of the drill frame, and the pressure sensor is disposed on the threaded rod.
According to an embodiment of the invention, the drilling machine assembly comprises a second servo motor, a transmission shaft, a drill rod body and a drill bit which are connected in sequence, the second servo motor is connected to the drilling machine frame, and the torque sensor is arranged between the transmission shaft and the second servo motor.
According to an embodiment of the invention, the drilling system further comprises a rod stabilizer connected to the external frame, the rod body passing through the rod stabilizer to increase stability of the rod body during rotary cutting drilling.
According to an embodiment of the invention, the temperature applying system is a heating plate, the monitoring unit includes a hydraulic sensor and a temperature sensor, the heating plate is disposed on the side wall to heat the liquid in the water containing cavity, the temperature sensor is electrically connected to the control unit to monitor the temperature of the liquid, and the hydraulic sensor is electrically connected to the control unit to monitor the lateral confining pressure of the rock mass test piece.
According to an embodiment of the present invention, the seepage application assembly further includes a liquid pressurizing member, a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the liquid pressurizing member and the water inlet of the water containing cavity to apply lateral confining pressure to the rock mass test piece, and the water outlet pipe is communicated with the water outlet of the water containing cavity and the liquid pressurizing member to release pressure when the lateral confining pressure of the rock mass test piece is too large.
According to an embodiment of the present invention, the seepage application assembly further comprises a water inlet control valve and a water outlet control valve, the water inlet control valve is disposed in the water inlet pipe, the water outlet control valve is disposed in the water outlet pipe, and the temperature sensor is disposed between the water inlet control valve and the water outlet control valve.
According to an embodiment of the present invention, the number of the temperature sensors is two, one of the temperature sensors is disposed between the water inlet control valve and the water inlet, and the other of the temperature sensors is disposed between the water outlet control valve and the water outlet.
According to an embodiment of the invention, the rock mass multi-field coupling rotary cutting drilling test device further comprises a collecting and discharging horizontal table arranged above the upper seat, and the collecting and discharging horizontal table is communicated with the preformed hole, so that rock debris and liquid generated in the rotary cutting drilling process of the rock mass test piece are discharged into the collecting and discharging horizontal table through the preformed hole.
According to another aspect of the invention, a rock mass multi-field coupling rotary cutting drilling test method is provided. The method comprises the steps of setting target temperature, axial confining pressure and lateral confining pressure of a rock mass test piece in a control monitoring system; placing a rock mass test piece in a pressure chamber; the liquid enters the water containing cavity, and the heating plate heats the liquid to a target temperature; keeping the temperature of the rock mass test piece, and enabling the liquid to penetrate through the permeable membrane to form stable seepage around the rock mass test piece; the liquid in the water containing cavity applies lateral confining pressure to the rock mass test piece, and the axial hydraulic oil cylinder applies axial confining pressure to the rock mass test piece; setting drilling data in a control monitoring system; the drilling machine system carries out rotary cutting drilling on the rock mass test piece; the control monitoring system monitors and stores drilling parameters in the rotary cutting drilling process in real time; and (4) bringing the drilling parameters into a rotary-cut drilling inversion model of the rock mass to obtain the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass.
One embodiment of the present invention has the following advantages or benefits:
the rock mass multi-field coupling rotary cutting drilling test device comprises a stress seepage application system and a temperature application system, wherein the stress seepage application system applies axial confining pressure to a rock mass test piece through an axial hydraulic oil cylinder, applies lateral confining pressure to the rock mass test piece through liquid pressure in a water containing cavity, meanwhile, liquid in the water containing cavity penetrates through a permeable film to enter the periphery of the rock mass test piece to apply a seepage field, and applies a temperature field to the rock mass test piece through a heating plate externally arranged on the side wall, so that the stress, seepage and temperature environment borne by a field rock mass can be effectively reduced, and drilling parameters of the rock mass under the multi-field coupling action of the stress field, the seepage field and the temperature field can be obtained while drilling under the condition that the rock mass test piece is kept not displaced and rotated, so that the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass are obtained.
Drawings
The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a front view of a rock mass multi-field coupling rotary cut drilling testing device according to an exemplary embodiment.
Fig. 2 is a left side view of a rock mass multi-field coupling rotary cut drilling testing device according to an exemplary embodiment.
Fig. 3 is a schematic diagram illustrating a stress seepage application system of a rock mass multi-field coupling rotary cut drilling test device according to an exemplary embodiment.
Wherein the reference numerals are as follows:
1. an outer frame; 11. a test platform; 111. a slide rail; 112. a test piece platform; 113. a slide rail fixing buckle; 114. a slide rail support column; 12. a side wall; 13. an upper seat; 131. reserving a hole; 14. climbing a ladder; 15. supporting the upright post; 2. a stress seepage application system; 21. an axial confining pressure applying assembly; 211. a base; 212. an axial hydraulic cylinder; 22. a seepage application assembly; 221. a permeable membrane; 222. a liquid pressurizing member; 223. a water inlet pipe; 224. a water outlet pipe; 225. a water inlet control valve; 226. a water outlet control valve; 3. heating plates; 4. a drilling rig system; 41. a drill propulsion assembly; 411. a first servo motor; 412. a threaded rod; 413. a drill rig frame; 4131. a first cross member; 4132. a second cross member; 42. a drill assembly; 421. a second servo motor; 422. a drive shaft; 423. a drill rod body; 424. a drill bit; 43. a drill rod stabilizing member; 5. a monitoring unit; 51. a torque sensor; 52. a pressure sensor; 53. a temperature sensor; 54. a rotational speed sensor; 55. a hydraulic pressure sensor; 6. a horizontal platform is arranged in a gathering way; 7. a pressure chamber; 8. a water containing cavity; 9. rock mass test piece.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
As shown in fig. 1 to 3, fig. 1 shows a front view of a rock mass multi-field coupling rotary cutting drilling test device provided by the invention. Fig. 2 shows a left side view of the rock mass multi-field coupling rotary cutting drilling testing device provided by the invention. Fig. 3 shows a schematic diagram of a stress seepage application system 2 of a rock mass multi-field coupling rotary cutting drilling test device provided by the invention.
The rock mass multi-field coupling rotary cutting drilling test device provided by the embodiment of the invention is applied to the rotary cutting drilling test of a rock mass test piece 9, and comprises an external frame 1, a stress seepage application system 2, a temperature application system, a drilling machine system 4 and a control monitoring system. The external frame 1 comprises a test platform 11, and a side wall 12 and an upper seat 13 which are respectively arranged on the test platform 11, wherein the upper seat 13 is provided with a preformed hole 131; the stress seepage application system 2 comprises an axial confining pressure application assembly 21 and a seepage application assembly 22, the confining pressure application assembly comprises a base 211 and an axial hydraulic oil cylinder 212 connected to the base 211, a pressure chamber 7 for placing a rock test piece 9 is formed by enclosing a side wall 12, an upper seat 13 and the base 211, the axial hydraulic oil cylinder 212 applies axial confining pressure to the rock test piece 9 to keep the rock test piece 9 from moving, the seepage application assembly 22 comprises a permeable film 221, the permeable film 221 is attached to the outer wall of the rock test piece 9 and encloses with the side wall 12 to form a water containing cavity 8, so that liquid enters the water containing cavity 8 and then applies lateral confining pressure to the rock test piece 9, and the liquid passes through the permeable film 221 to apply a seepage field to the rock test piece 9; the temperature applying system is used for applying a temperature field to the rock mass test piece 9; the drilling machine system 4 comprises a drilling machine propelling assembly 41 and a drilling machine assembly 42 which are arranged above the upper seat 13, the drilling machine assembly 42 penetrates through the reserved hole 131 to rotatably cut the rock mass test piece 9, and the drilling machine propelling assembly 41 is connected to one end, far away from the rock mass test piece 9, of the drilling machine assembly 42 so as to drive the drilling machine assembly 42 to drill; the control monitoring system comprises a control unit and a monitoring unit 5, the monitoring unit 5 comprises a torque sensor 51 arranged on the drilling machine component 42 and a pressure sensor 52 arranged on the drilling machine propelling component 41, the torque sensor 51 and the pressure sensor 52 are respectively and electrically connected with the control unit so as to process drilling data of the drilling machine system 4, and the stress seepage flow applying system 2, the temperature applying system and the drilling machine system 4 are respectively and electrically connected with the control unit.
Wherein, the test platform 11 is placed on the ground, increases the overall stability of the device, and the outer frame 1 further comprises supporting upright posts 15 which are annularly arranged on the test platform 11 at equal intervals so as to ensure the vertical stability of the rotary cutting drilling test process of the drilling machine assembly 42. The side wall 12 and the upper seat 13 are fixedly connected to the test platform 11 through screws, the side wall 12 and the upper seat 13 are surrounded to form a pressure chamber 7, the upper seat 13 is a top wall of the pressure chamber 7, the base 211 is a bottom wall of the pressure chamber 7, the pressure chamber 7 is in a regular shape such as a cuboid or a cube, the axial hydraulic oil cylinder 212 is abutted to the base 211, a permeable film 221 is arranged in the pressure chamber 7, the permeable film 221 is surrounded with the side wall 12, the upper seat 13 and the base 211 to form a water containing cavity 8, after the rock mass test piece 9 is placed in the pressure chamber 7, the permeable film 221 is attached to the outer surface of the rock mass test piece 9, liquid is filled in the water containing cavity 8, the liquid can be water or oil, and part of water or oil enters the periphery of the rock mass test piece 9 through the permeable film 221 so as to apply a seepage field around the rock mass test piece 9 to simulate the influence of underground water on a rock mass in underground engineering; heating the liquid by a temperature applying system so as to heat the rock mass test piece 9, namely applying a temperature field; the liquid in the water containing cavity 8 generates pressure and is transmitted to the rock mass test piece 9 through the permeable film 221, namely, lateral confining pressure is applied to the rock mass test piece 9, the axial pressure of the axial hydraulic oil cylinder 212 firstly acts on the base 211 and is transmitted to the rock mass test piece 9 through the base 211, meanwhile, the upper seat 13 above the test piece forms restraint on the rock mass test piece 9, namely, axial confining pressure is applied to the rock mass test piece 9, and the lateral confining pressure and the axial confining pressure which are simultaneously applied to the rock mass test piece 9 form an applied stress field. When the drilling machine assembly 42 drills the rock mass test piece 9 downwards, different axial pressures are applied to the rock mass test piece 9 through the axial hydraulic oil cylinder 212, so that the axial pressure from the drilling machine assembly 42, which is received by the rock mass test piece 9 in the drilling and cutting process, is counteracted, the test piece is prevented from generating displacement in the horizontal direction and the vertical direction, and meanwhile, the test piece is prevented from rotating in the drilling and cutting process.
Preferably, the type of the permeable membrane 221 determines the permeation rate, and the rate of fluid permeation through the permeable membrane 221 can be controlled by different types of permeable membranes 221 to simulate the permeation rate of groundwater in different geology. The control unit comprises a logic controller and a power amplifier, wherein the logic controller receives signals of various sensors such as a pressure sensor 52, a torque sensor 51, a temperature sensor 53 and a hydraulic sensor 55, compares the signals with set values, sends out a voltage instruction, and accurately controls the axial confining pressure and the lateral confining pressure and the temperature of the rock mass test piece 9, and the drilling speed, the drilling speed and the drilling pressure of the drilling machine assembly 42 through the power amplifier. The deformed sealing gaskets are arranged on the inner sides among the base 211, the upper seat 13 and the side wall 12, so that the pressure chamber 7 and the water containing cavity 8 have good sealing performance, and further, the effective application of osmotic pressure is ensured. In order to replace the drill rod body 423 and the drill bit 424 conveniently, the external frame 1 further comprises a ladder 14 arranged on one side of the experiment platform, so that a tester can replace the drill rod body 423 and the drill bit 424 on the experiment platform 11 through the ladder 14, and can clean the horizontal collecting and arranging table 6 conveniently after the experiment is completed.
In a preferred embodiment of the present invention, the drill pushing assembly 41 includes a first servo motor 411, a threaded rod 412 and a drill frame 413 for mounting the drill assembly 42, the first servo motor 411 is connected to the outer frame 1, the threaded rod 412 is connected to the first servo motor 411, the drill frame 413 is threadedly connected to the threaded rod 412 to convert a rotational motion of the threaded rod 412 into a linear motion of the drill frame 413, and the pressure sensor 52 is disposed on the threaded rod 412.
As shown in fig. 1-3, the drill stand 413 preferably includes a first beam 4131 and a second beam 4132, the drive shaft 422 of the drill assembly 42 being connected to the first beam 4131, the first beam 4131 being connected to the outer frame 1 to ensure lateral stability of the drill assembly 42 during drilling. Because the drill assembly 42 is long, the second beam 4132 is arranged below the first beam 4131, the drill rod body 423 of the drill assembly 42 is connected to the second beam 4132, the threaded rod 412 sequentially passes through the first beam 4131 and the second beam 4132 from top to bottom, the first beam 4131 is in threaded connection with the threaded rod 412, when the threaded rod 412 is driven to rotate by the first servo motor 411, the first beam 4131 drives the drill assembly 42 to descend or ascend along the threads of the threaded rod 412, and the second beam 4132 plays a role in guiding the threaded rod 412.
Preferably, the threaded rods 412 are annularly arranged on the circumference of the drilling machine assembly 42 at equal intervals, the top end of each threaded rod 412 is connected with the first servo motor 411 respectively, and a pressure sensor 52 is arranged respectively, so as to monitor whether the pressures of the threaded rods 412 are consistent or not, and avoid the deviation of the drilling machine assembly 42 in the drilling process.
In a preferred embodiment of the present invention, the drilling machine assembly 42 comprises a second servo motor 421, a transmission shaft 422, a drill rod body 423 and a drill bit 424 which are connected in sequence, the second servo motor 421 is connected to the drill frame 413, and the torque sensor 51 is arranged between the transmission shaft 422 and the second servo motor 421.
As shown in fig. 1 to 3, the drilling machine system 4 is divided into a drilling machine propelling assembly 41 and a drilling machine assembly 42, wherein the drilling machine propelling assembly 41 partially generates drilling pressure on the rock mass test piece 9, the drill rod 424 is in contact with the rock mass test piece 9, and the torque is sequentially transmitted to the drill bit 424, the drill rod body 423, the transmission shaft 422 and the torque sensor 51 from bottom to top, so that the pressure transmission between the transmission shaft 422 and the torque sensor 51 is avoided, and the torque sensor 51 is further protected.
Preferably, a rotational speed sensor 54 is also provided on the drill assembly 42 to monitor the rotational speed of the drill bit 424 of the drill assembly 42.
In a preferred embodiment of the present invention, drilling system 4 further comprises a rod stabilizer 43 connected to outer frame 1, rod body 423 extending through rod stabilizer 43 to increase stability of rod body 423 during rotary cut drilling.
As shown in fig. 1 to 3, the drill rod body 423 is clamped in the center of the drill rod stabilizer 43, and the outer periphery of the drill rod stabilizer 43 is connected to the test platform 11 in a bolt fixing manner, so that the drill rod stabilizer 43 can reduce the shaking of the drill rod body 423 in the horizontal direction during the drilling process.
In a preferred embodiment of the invention, the temperature application system is a heating plate 3, the monitoring unit 5 comprises a hydraulic pressure sensor 55 and a temperature sensor 53, the heating plate 3 is arranged on the side wall 12 to heat the liquid in the water containing cavity 8, the temperature sensor 53 is electrically connected with the control unit to monitor the temperature of the liquid, and the hydraulic pressure sensor 55 is electrically connected with the control unit to monitor the lateral confining pressure of the rock mass test piece 9.
As shown in fig. 1 to 3, the temperature sensor 53 and the hydraulic pressure sensor 55 may be disposed in the water containing chamber 8, or may be disposed on a pipeline through which the liquid flows, and the temperature and the pressure of the liquid may be monitored at any time. The hot plate 3 carries out the temperature field through the liquid direct heating in the appearance water cavity 8 around the ground test piece and applys, the logical controller of the control unit receives the liquid temperature in the appearance water cavity 8 of temperature sensor 53 monitoring, and compare with the target temperature who sets for, if the temperature is different then adjust, and then realize holding the dynamic adjustment of liquid temperature in the water cavity 8, the logical controller of the same reason still receives the pressure in the appearance water cavity 8 of hydraulic sensor 55 monitoring, and compare with the side direction confined pressure that sets for, realize the dynamic adjustment of the side direction confined pressure that the rock mass test piece 9 received. In addition, by controlling the liquid pressure in the water containing cavity 8, different osmotic pressures can be applied to the rock mass test piece 9, and the permeation amount of the liquid through the permeable membrane 221 can be further controlled.
In a preferred embodiment of the present invention, the seepage application assembly 22 further comprises a liquid pressurizing member 222, a water inlet pipe 223 and a water outlet pipe 224, wherein the water inlet pipe 223 is communicated with the liquid pressurizing member 222 and the water inlet of the water containing cavity 8 to apply lateral confining pressure to the rock mass test piece 9, and the water outlet pipe 224 is communicated with the water outlet of the water containing cavity 8 and the liquid pressurizing member 222 to release pressure when the lateral confining pressure of the rock mass test piece 9 is too large.
As shown in fig. 1 to 3, the liquid pressurizing member 222, the water inlet pipe 223, the water containing cavity 8 and the water outlet pipe 224 are sequentially communicated to form a circulating liquid pressure device, when the pressure in the water containing cavity 8 is too low, the liquid can increase the pressure after entering the water containing cavity 8 through the liquid pressurizing member 222 and the water inlet pipe 223, so as to increase the lateral confining pressure on the rock mass test piece 9, and when the hydraulic sensor 55 monitors that the pressure in the water containing cavity 8 is too high, the liquid enters the liquid pressurizing member 222 through the water outlet pipe 224, so that the pressure relief of the liquid in the water containing cavity 8 is completed.
In a preferred embodiment of the present invention, the seepage application assembly 22 further comprises an inlet control valve 225 and an outlet control valve 226, the inlet control valve 225 being disposed within the inlet pipe 223, the outlet control valve 226 being disposed within the outlet pipe 224, and the temperature sensor 53 being disposed between the inlet control valve 225 and the outlet control valve 226.
As shown in fig. 1 to 3, the water inlet control valve 225 and the water outlet control valve 226 can be manually controlled, or can be electrically connected with the control unit, liquid enters the water containing cavity 8 through the water inlet control valve 225 and acts on the periphery of the rock mass test piece 9 through the side permeable membrane 221, the pressure can be released by adjusting the water outlet control valve 226 when the osmotic pressure is too high, and the osmotic pressure can be increased by adjusting the water inlet control valve 225 when the osmotic pressure is too low.
In a preferred embodiment of the present invention, the temperature sensors 53 are two in number, one temperature sensor 53 is disposed between the water inlet control valve 225 and the water inlet, and the other temperature sensor 53 is disposed between the water outlet control valve 226 and the water outlet.
As shown in fig. 1 to 3, a temperature sensor 53 is disposed between the water inlet control valve 225 and the water inlet, a temperature sensor 53 is disposed between the water outlet control valve 226 and the water outlet, the control unit monitors whether the temperatures at the two locations are consistent at any time, and hydraulic sensors 55 are disposed at the two locations respectively to check whether the pressures at the two locations are consistent, if the temperatures and the pressures are not consistent, the water inlet control valve 225 and the water outlet control valve 226 need to be checked for air leakage, or other faults affecting the temperatures and the pressures need to be eliminated.
In a preferred embodiment of the present invention, the rock mass multi-field coupling rotary cutting drilling test device further comprises a horizontal collecting and draining table 6 disposed above the upper seat 13, wherein the horizontal collecting and draining table 6 is communicated with the preformed hole 131, so that rock debris and liquid generated during rotary cutting drilling of the rock mass test piece 9 are drained into the horizontal collecting and draining table 6 through the preformed hole 131.
As shown in fig. 1 to 3, when the drill rod assembly drills, rock debris and liquid generated during drilling are pressed by lateral confining pressure and axial confining pressure and then discharged into the horizontal collecting and discharging table 6 at the preformed hole 131, and after the horizontal collecting and discharging table 6 collects the water and rock debris generated during testing, the water and rock debris are finally discharged through the bottom of the horizontal collecting and discharging table 6 after the testing is finished.
In a preferred embodiment of the invention, in order to facilitate the placement of the rock mass test piece 9 before the experiment and the taking out of the rock mass test piece after the experiment is completed, the test platform 11 is provided with the slide rail 111 and the test piece platform 112, the side wall 12 and the upper seat 13 are connected to the test piece platform 112, the test piece platform 112 is fixed on the slide rail 111 through the slide rail fixing buckle 113, the test piece platform 112 can horizontally move on the slide rail 111, and the slide rail support column 114 provides support for the slide rail 111 to extend out of the outer section of the test platform 11, so that the stability of the slide rail 111 is improved.
The rock mass multi-field coupling rotary cutting drilling test device comprises a stress seepage application system 2 and a temperature application system, wherein the stress seepage application system 2 applies axial confining pressure to the rock mass test piece 9 through the axial hydraulic oil cylinder 212, applies lateral confining pressure to the rock mass test piece 9 through the liquid pressure in the water containing cavity 8, meanwhile, the liquid in the water containing cavity 8 passes through the permeable membrane 221 and enters the periphery of the rock mass test piece 9 to apply a seepage field, the heating plate 3 arranged outside the side wall 12 applies a temperature field to the rock mass test piece 9, can effectively reduce the stress, seepage and temperature environment borne by the rock mass on site, keeps the rock mass test piece 9 not to displace and rotate, drilling parameters of the rock mass under the multi-field coupling action of a stress field, a seepage field and a temperature field can be obtained while drilling, so that the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass are obtained.
The embodiment of the invention provides a rock mass multi-field coupling rotary cutting drilling test method. The method comprises the following steps: setting a target temperature, an axial confining pressure and a lateral confining pressure of a rock mass test piece 9 in a control monitoring system; placing the rock mass test piece 9 in the pressure chamber 7; the liquid enters the water containing cavity 8, and the heating plate 3 heats the liquid to a target temperature; keeping the temperature of the rock mass test piece 9, and enabling the liquid to penetrate through the permeable film 221 to form stable seepage around the rock mass test piece 9; the liquid in the water containing cavity 8 applies lateral confining pressure to the rock mass test piece 9, and the axial hydraulic oil cylinder 212 applies axial confining pressure to the rock mass test piece 9; setting drilling data in a control monitoring system; the drilling machine system 4 carries out rotary cutting drilling on the rock mass test piece 9; the control monitoring system monitors and stores drilling parameters in the rotary cutting drilling process in real time; and (4) bringing the drilling parameters into a rotary-cut drilling inversion model of the rock mass to obtain the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass.
The rock mass test piece 9 is placed in the pressure chamber 7, the test piece platform 112 is pushed to a specified position through the slide rail 111, and the test piece platform is fixed on the test platform 11 through the slide rail fixing buckle 113. Liquid enters the water containing cavity 8, due to the heat conductivity of the side wall 12, the heating plate 3 externally arranged on the side wall 12 can heat the liquid in the water containing cavity 8 through the side wall 12, the temperature sensor 53 immediately transmits a temperature signal to the control unit, the control unit controls the heating to a target temperature, after the temperature is kept, water flow and corresponding water pressure are applied to the test piece through the permeable film 221 so as to form stable seepage around the rock mass test piece 9, then the control unit controls the axial hydraulic oil cylinder 212 to apply axial confining pressure to the rock mass test piece 9, meanwhile, the liquid in the water containing cavity 8 is controlled to apply lateral confining pressure to the rock mass test piece 9, further, a stress field, a seepage field and a temperature field applied to the rock mass test piece 9 are completed, the drilling machine component 42 is driven to wholly lift up and down through the first servo motor 411 so as to provide vertical downward drilling pressure for the drilling machine component 42, and the rotary cutting drilling displacement of the drill bit 424 can be accurately controlled by the control unit, two data of the drilling speed and the rotating speed of the drill bit 424 of the drilling machine assembly 42 can be set in the control unit, the drilling pressure and the rotating speed of the drill bit 424 can also be set, one group of data is selected for setting, the drilling machine assembly 42 can carry out rotary cutting drilling on the rock mass test piece 9 under the stress-seepage-temperature multi-field coupling effect, the drilling torque is monitored through the torque sensor 51, the rotating speed of the drill bit 424 is monitored through the rotating speed sensor 54, the drilling pressure is monitored through the pressure sensor 52, and the drilling speed is obtained by dividing the displacement of the threaded rod 412 by the time. After the drilling test is finished, the drilling machine assembly 42 is lifted, the test piece platform 112 is pushed out through the slide rail 111, the rock test piece 9 is taken out from the pressure chamber 7, the test bed is cleaned, the collected drilling torque, the rotating speed of the drill bit 424, the drilling pressure and the drilling speed test data are processed, the change rule of the drilling parameters is analyzed, and the rotary cutting drilling test of the rock parameters under the multi-field coupling effect is completed. And (4) bringing the drilling torque, the rotating speed of the drill bit 424, the drilling pressure and the drilling speed obtained by monitoring into a rotary-cut drilling inversion model of the rock mass to obtain the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass.
According to the multi-field coupling rotary cutting drilling test method, axial confining pressure is applied to the rock test piece 9 through the axial hydraulic oil cylinder 212, lateral confining pressure is applied to the rock test piece 9 through liquid pressure in the water containing cavity 8, meanwhile, liquid in the water containing cavity 8 penetrates through the permeable film 221 to enter the periphery of the rock test piece 9 to apply a seepage field, a temperature field is applied to the rock test piece 9 through the heating plate 3 externally arranged on the side wall 12, stress, seepage and temperature environments borne by a field rock can be effectively reduced, and drilling parameters of the rock under the multi-field coupling action of a stress field, a seepage field and a temperature field can be obtained while drilling under the condition that the rock test piece 9 is kept not displaced and rotated, so that the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock are obtained.
In embodiments of the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention.
In the description herein, the appearances of the phrase "one embodiment," "a preferred embodiment," or the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.
Claims (10)
1. The utility model provides a many field coupling rotary-cut of rock mass creep into testing arrangement, is applied to the rotary-cut of rock mass test piece (9) and creeps into the test, its characterized in that includes:
the external frame (1) comprises a test platform (11), and a side wall (12) and an upper seat (13) which are respectively arranged on the test platform (11), wherein the upper seat (13) is provided with a preformed hole (131);
the stress seepage application system (2) comprises an axial confining pressure application assembly (21) and a seepage application assembly (22), wherein the confining pressure application assembly comprises a base (211) and an axial hydraulic oil cylinder (212) connected to the base (211), the side wall (12), the upper seat (13) and the base (211) are arranged in a surrounding mode to form a pressure chamber (7) for placing the rock mass test piece (9), the axial hydraulic oil cylinder (212) applies axial confining pressure to the rock mass test piece (9) to keep the rock mass test piece (9) not to move, the seepage application assembly (22) comprises a permeable film (221), the permeable film (221) is attached to the outer wall of the rock mass test piece (9) and forms a water containing cavity (8) in a surrounding mode with the side wall (12) to enable liquid to enter the water containing cavity (8) and then apply lateral confining pressure to the rock mass test piece (9), liquid passes through the permeable membrane (221) to apply a seepage field to the rock mass test piece (9);
the temperature applying system is used for applying a temperature field to the rock mass test piece (9);
the drilling machine system (4) comprises a drilling machine propelling assembly (41) and a drilling machine assembly (42) which are arranged above the upper seat (13), the drilling machine assembly (42) penetrates through the reserved hole (131) to rotatably cut the rock mass test piece (9), and the drilling machine propelling assembly (41) is connected to one end, away from the rock mass test piece (9), of the drilling machine assembly (42) so as to drive the drilling machine assembly (42) to drill; and
the control monitoring system comprises a control unit and a monitoring unit (5), wherein the monitoring unit (5) comprises a torque sensor (51) arranged on the drilling machine assembly (42) and a pressure sensor (52) arranged on the drilling machine propelling assembly (41), the torque sensor (51) and the pressure sensor (52) are respectively electrically connected with the control unit to process drilling data of the drilling machine system (4), and the stress seepage application system (2), the temperature application system and the drilling machine system (4) are respectively electrically connected with the control unit.
2. The rock mass multi-field coupling rotary cutting drilling test device according to claim 1, wherein the drilling machine propelling assembly (41) comprises a first servo motor (411), a threaded rod (412) and a drilling machine frame (413) for mounting the drilling machine assembly (42), the first servo motor (411) is connected to the outer frame (1), the threaded rod (412) is connected to the first servo motor (411), the drilling machine frame (413) is in threaded connection with the threaded rod (412) so as to convert the rotary motion of the threaded rod (412) into the linear motion of the drilling machine frame (413), and the pressure sensor (52) is arranged on the threaded rod (412).
3. The rock mass multi-field coupling rotary cutting drilling test device according to claim 2, wherein the drilling machine assembly (42) comprises a second servo motor (421), a transmission shaft (422), a drill rod body (423) and a drill bit (424) which are sequentially connected, the second servo motor (421) is connected to the drilling machine frame (413), and the torque sensor (51) is arranged between the transmission shaft (422) and the second servo motor (421).
4. The rock mass multi-field coupling rotary cut drilling test device according to claim 3, wherein the drilling machine system (4) further comprises a drill rod stabilizer (43) connected to the outer frame (1), and the drill rod body (423) penetrates through the drill rod stabilizer (43) to increase stability of the drill rod body (423) during rotary cut drilling.
5. The rock mass multi-field coupling rotary cutting drilling test device according to claim 1, wherein the temperature applying system is a heating plate (3), the monitoring unit (5) comprises a hydraulic sensor (55) and a temperature sensor (53), the heating plate (3) is arranged on the side wall (12) to heat the liquid in the water containing cavity (8), the temperature sensor (53) is electrically connected with the control unit to monitor the temperature of the liquid, and the hydraulic sensor (55) is electrically connected with the control unit to monitor the lateral confining pressure of the rock mass test piece (9).
6. The rock mass multi-field coupling rotary cutting drilling test device according to claim 5, wherein the seepage flow applying assembly (22) further comprises a liquid pressurizing piece (222), a water inlet pipe (223) and a water outlet pipe (224), the water inlet pipe (223) is communicated with the liquid pressurizing piece (222) and the water inlet of the water containing cavity (8) to apply lateral confining pressure on the rock mass test piece (9), and the water outlet pipe (224) is communicated with the water outlet of the water containing cavity (8) and the liquid pressurizing piece (222) to release pressure when the lateral confining pressure of the rock mass test piece (9) is too large.
7. The rock mass multi-field coupling rotary-cut drilling test device according to claim 6, wherein the seepage application assembly (22) further comprises a water inlet control valve (225) and a water outlet control valve (226), the water inlet control valve (225) is arranged in the water inlet pipe (223), the water outlet control valve (226) is arranged in the water outlet pipe (224), and the temperature sensor (53) is arranged between the water inlet control valve (225) and the water outlet control valve (226).
8. The rock mass multi-field coupling rotary cutting drilling test device according to claim 7, wherein the number of the temperature sensors (53) is two, one temperature sensor (53) is arranged between the water inlet control valve (225) and the water inlet, and the other temperature sensor (53) is arranged between the water outlet control valve (226) and the water outlet.
9. The rock mass multi-field coupling rotary cutting drilling test device according to claim 1, further comprising a collecting and discharging horizontal table (6) arranged above the upper seat (13), wherein the collecting and discharging horizontal table (6) is communicated with the preformed hole (131) so that rock debris and liquid generated in the rotary cutting drilling process of the rock mass test piece (9) are discharged into the collecting and discharging horizontal table (6) through the preformed hole (131).
10. A rock mass multi-field coupling rotary cutting drilling test method is characterized by comprising the following steps:
setting target temperature, axial confining pressure and lateral confining pressure of a rock mass test piece (9) in a control monitoring system;
placing a rock mass test piece (9) in a pressure chamber (7);
the liquid enters the water containing cavity (8), and the heating plate (3) heats the liquid to a target temperature;
keeping the temperature of the rock mass test piece (9), and enabling the liquid to penetrate through the permeable film (221) to form stable seepage around the rock mass test piece (9);
liquid in the water containing cavity (8) exerts lateral confining pressure on the rock mass test piece (9), and the axial hydraulic oil cylinder (212) exerts axial confining pressure on the rock mass test piece (9);
setting drilling data in a control monitoring system;
the drilling machine system (4) performs rotary cutting drilling on the rock mass test piece (9);
the control monitoring system monitors and stores drilling parameters in the rotary cutting drilling process in real time;
and (4) bringing the drilling parameters into a rotary-cut drilling inversion model of the rock mass to obtain the equivalent compressive strength, cohesive force, internal friction angle and elastic modulus of the rock mass.
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