CN211206053U - Rock confining pressure loading device for laser drilling experiment - Google Patents
Rock confining pressure loading device for laser drilling experiment Download PDFInfo
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- CN211206053U CN211206053U CN201921283005.4U CN201921283005U CN211206053U CN 211206053 U CN211206053 U CN 211206053U CN 201921283005 U CN201921283005 U CN 201921283005U CN 211206053 U CN211206053 U CN 211206053U
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Abstract
The utility model discloses a rock confining pressure loading device for laser drilling experiment, including confining pressure adds the carrier, axial loading system, radial confining pressure system, laser emission system and data information collection system, the confining pressure loading body includes confining pressure loading storehouse, loading piston and latex barrier film, confining pressure loading storehouse is the hollow cylinder of upper end open-ended, loading piston center is equipped with the through-hole that is used for supplying laser to pass through, axial loading system and radial confining pressure system can realize the loading and the regulation of the axial stress and the radial stress that the rock sample receives respectively, laser emission system is used for carrying out the drilling experiment, data information collection system is used for data acquisition and observation condition, its advantage lies in, the through-hole that passes through the loading piston carries out the laser drilling experiment, adopt the mode of axial loading and radial confining pressure to simulate the ground stress that the rock receives, can satisfy the confining pressure loading requirement of laser drilling experiment to the rock sample, and the real-time control of confining pressure loading is achieved by combining a data information acquisition system.
Description
Technical Field
The utility model relates to a rock confined pressure loading equipment technical field especially relates to a rock confined pressure loading device for laser creeps into experiment.
Background
The conventional rock triaxial confining pressure loading device is mainly used for measuring experiments of rock mechanical properties, and the confining pressure loading device can be directly contacted with a rock sample to be measured in the triaxial (X axis, Y axis and Z axis) directions, so that the load is applied to the rock sample to be measured. Therefore, the structure of the conventional rock triaxial confining pressure loading device is relatively simple.
The laser drilling experiment of the rock, namely the process of simulating the laser geological drilling environment in a laboratory and irradiating the rock by using a high-energy laser beam so as to drill a hole on a rock sample. When a rock sample is drilled by laser, in order to enable the geological environment of the rock sample to be basically the same as the environment of rocks in an actual stratum, triaxial confining pressure loading needs to be carried out on the rock sample in a laboratory environment, and therefore the stress condition of the rocks in the stratum is simulated. That is to say, the rock sample in the laser drilling experiment needs to realize the triaxial confining pressure loading, and also needs to reserve the surface to be drilled so as to realize the laser drilling. Therefore, the conventional triaxial confining pressure loading device cannot be directly used in laser drilling experiments of rocks, and the structure of the conventional triaxial confining pressure loading device must be redesigned.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art current situation, provide a rock confined pressure loading device for laser creeps into experiment, the through-hole that sees through the loading piston carries out laser and creeps into the experiment, adopts the mode simulation rock that axial loading and radial confined pressure to receive the ground stress, can satisfy laser and creeps into the confined pressure loading requirement of experiment to the rock sample to combine data information acquisition system, reach the real time control to confined pressure loading.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a rock confining pressure loading device for a laser drilling experiment comprises a confining pressure loading body, an axial loading system, a radial confining pressure system, a laser emission system and a data information acquisition system, wherein the confining pressure loading body comprises a confining pressure loading bin, a loading piston and a latex isolating membrane, the confining pressure loading bin is a hollow cylinder with an opening at the upper end, the outer bottom surface of the confining pressure loading bin is fixed on a base, a base used for placing a rock sample is arranged on the inner bottom surface of the confining pressure loading bin, a through hole used for allowing laser to penetrate through is formed in the center of the loading piston, the axial loading system applies axial pressure to the loading piston, the loading piston applies axial pressure to the rock sample to realize the loading and adjustment of the axial stress borne by the rock sample, the latex isolating membrane is used for coating the rock sample, the loading piston and the inner wall of the confining pressure loading bin are sealed through a first annular sealing ring, and, the radial confining pressure system injects or derives high-pressure liquid into the confining pressure loading bin, realize the loading and the regulation of the radial stress that the rock sample receives, seal through the second ring seal between emulsion barrier film and the loading piston outer wall, isolated rock sample and the high-pressure liquid that radial confining pressure system injected, laser emission system is used for shining laser to the rock sample, creep into the experiment, data information collection system is used for gathering the axial stress that the rock sample receives and the data of radial stress and observe the condition that high-pressure liquid injected into in the confining pressure loading bin and the condition that rock sample surface laser creeps into.
Furthermore, be equipped with first drain hole and second drain hole on the confined pressure loading storehouse lateral wall, the second drain hole is located first drain hole top, and the second drain hole is higher than rock sample up end and is less than first sealing washer lower extreme face, and first drain hole is used for leading-in high-pressure liquid to confined pressure loading storehouse, and the second drain hole is used for transshipping the flowing back.
According to the technical scheme, the axial loading system comprises a hydraulic control loop and a plurality of identical hydraulic cylinders, the hydraulic cylinders are uniformly distributed right above the loading piston, the hydraulic control loop comprises an oil tank, an oil filter, a hydraulic pump, a pressure reducing valve, an overflow valve, a first pressure gauge, a cooler and an electromagnetic directional valve, and the hydraulic cylinders are communicated with the hydraulic control loop after being connected in parallel.
Furthermore, a hydraulic push plate is arranged on a piston rod of the hydraulic cylinder, and a rubber cushion pad is arranged on the hydraulic push plate.
Furthermore, the upper end face of the loading piston is provided with a positioning hole, the shape and the size of the positioning hole are the same as those of the rubber cushion pad, and the positions of the positioning holes on the loading piston correspond to the positions of the hydraulic cylinders above the loading piston one by one.
According to the technical scheme, the radial confining pressure system comprises a motor, a screw rod push rod, a hydraulic loading cylinder, a second pressure gauge, a valve and a sealing joint, an output shaft of the motor and a piston rod of the hydraulic loading cylinder are connected to the screw rod push rod, and the hydraulic loading cylinder, the second pressure gauge and the valve are sequentially connected through guide pipes and are communicated with the first liquid guide port through the sealing joint.
Above-mentioned technical scheme, data information collection system includes axial pressure sensor, axial foil gage and radial pressure sensor, radial foil gage and first camera and second camera, and axial pressure sensor installs at rock sample top, and the axial foil gage is installed in rock sample bottom, and radial pressure sensor and radial foil gage are all installed in rock sample side, and the loading piston top that first camera was installed, the second camera is installed in the confined pressure loading storehouse outside.
Furthermore, the radial pressure sensors and the radial strain gauges are all in a group, a is not less than 1 and is an integer, the radial pressure sensors and the radial strain gauges in the group a are axially distributed along the rock sample, in each group of radial pressure sensors and radial strain gauges, the number of the radial pressure sensors and the number of the radial strain gauges in the group a are b, b is not less than 1 and is an integer, and the b radial pressure sensors and the radial strain gauges are alternately and uniformly distributed along the same horizontal height of the rock sample.
Furthermore, the confining pressure loading bin is made of toughened glass, so that the confining pressure loading bin has enough strength, and a second camera outside the confining pressure loading bin is favorable for recording the injection condition of high-pressure liquid in the confining pressure loading bin.
Furthermore, the upper end face of the base is of a concave spherical shape, so that the deformation of a rock sample is adapted, and an installation space is provided for the axial strain gauge.
The utility model has the advantages that:
the device has the advantages that the laser drilling experiment is carried out through the through hole of the loading piston, the crustal stress borne by the rock is simulated by adopting the modes of axial loading and radial confining pressure, the confining pressure loading requirement of the laser drilling experiment on a rock sample can be met, the real-time control on confining pressure loading is achieved by combining a data information acquisition system, the axial loading stress and the radial confining pressure are continuously adjustable, therefore, the crustal stress borne by the rock in different stratums is simulated, and the experimental result is more scientific and instructive.
Drawings
FIG. 1 is a schematic structural diagram of the rock confining pressure loading device of the present invention;
FIG. 2 is a schematic structural view of the confining pressure loading bin of the present invention;
FIG. 3 is one of the state diagrams of the rock sample in the experiment (the arrow is the stress direction);
FIG. 4 is a second state diagram (arrow is the direction of stress) of the rock sample in the experiment;
FIG. 5 is a schematic structural diagram of the axial loading system of the present invention;
FIG. 6 is a schematic diagram of the position distribution of the hydraulic cylinders in the axial loading system of the present invention;
fig. 7 is a schematic structural diagram of the radial loading system of the present invention.
Description of the labeling: 100. confining pressure adding carrier 101, confining pressure loading bin 102, loading piston 103, first annular sealing ring 104, second liquid guide port 105, first liquid guide port 106, base 107, base 108, second annular sealing ring 109, latex isolating membrane 200, axial loading system 201, hydraulic cylinder 202, oil tank 203, oil filter 204, hydraulic pump 205, electromagnetic reversing valve 206, pressure reducing valve 207, overflow valve 208, cooler 209, first pressure gauge 2010, hydraulic push plate 2011, rubber buffer 300, radial confining pressure system 301, motor 302, lead screw push rod 303, hydraulic loading cylinder 304, second pressure gauge 305, valve 306, sealing joint 401, first camera 402, second camera 403, axial pressure sensor 404, axial strain gauge 405, radial strain gauge 406, radial pressure sensor, 501. laser emitting head, 600, rock sample.
Detailed Description
In the rock laser drilling experiment, the theoretical pressures in the X-axis direction, the Y-axis direction and the Z-axis direction are respectively sigma1、σ2And σ3Where σ is1＝σ2. Therefore, the axial loading stress is preset to be sigma in the experiment3The radial loading stress is preset to be sigma in the experiment1。
Referring to fig. 1, a rock confining pressure loading device for a laser drilling experiment includes a confining pressure loading body 100, an axial loading system 200, a radial confining pressure system 300, a laser emitting system, and a data information collecting system.
Referring to fig. 2 and 3, the confining pressure loading carrier 100 includes a confining pressure loading bin 101, a loading piston 102 and an emulsion isolating membrane 109, wherein: the confining pressure loading bin 101 is a hollow cylinder with an open upper end, the outer bottom surface of the confining pressure loading bin is fixed on the base 106, and the inner bottom surface of the confining pressure loading bin is provided with a base 107 for placing a rock sample 600; a through hole for laser to penetrate through is formed in the center of the loading piston 102; the emulsion isolating membrane 109 is used for coating the rock sample 600, the loading piston 102 and the inner wall of the confining pressure loading bin 101 are sealed through the first annular sealing ring 103, a closed space is formed in the confining pressure loading bin 101, and impurities in the air are prevented from entering the confining pressure loading bin 101.
Referring to fig. 5 and 6, the axial loading system 200 includes a hydraulic control circuit and a plurality of identical hydraulic cylinders 201, the hydraulic cylinders 201 are uniformly distributed right above the loading piston 102, the hydraulic control circuit includes an oil tank 202, an oil filter 203, a hydraulic pump 204, a pressure reducing valve 206, an overflow valve 207, a first pressure gauge 209, a cooler 208 and an electromagnetic directional valve 205, the hydraulic cylinders 201 are connected in parallel and then communicated with the hydraulic control circuit, so that output power of all the hydraulic cylinders 201 is consistent, and relevant hydraulic components can be reasonably selected according to experimental requirements. The axial loading system 200 applies axial pressure to the loading piston 102, so that the loading piston 102 applies axial pressure to the rock sample 600, and loading and adjustment of axial stress borne by the rock sample 600 are realized.
Preferably, a hydraulic push plate 2010 is arranged on a piston rod of the hydraulic cylinder 201, a rubber cushion 2011 is mounted on the hydraulic push plate 2010, and the rubber cushion 2011 can reduce rigid impact force between the hydraulic cylinder 401 and the loading piston 102.
Preferably, the loading piston 102 is provided with a positioning hole on the upper end surface, the shape and size of the positioning hole are the same as those of the rubber cushion 2011, and the positioning hole is in one-to-one correspondence with the position of the hydraulic cylinder 401 above the loading piston 102, so that the rubber cushion 2011 is quickly positioned when contacting with the loading piston 102.
Referring to fig. 2, a first liquid guide port 105 and a second liquid guide port 104 are arranged on a side wall of the confining pressure loading bin 101, the second liquid guide port 104 is located above the first liquid guide port 105, the second liquid guide port 104 is higher than an upper end surface of the rock sample 600 and lower than a lower end surface of the first close ring-shaped sealing ring 103, the first liquid guide port 105 is used for guiding high-pressure liquid into the confining pressure loading bin 101, and the second liquid guide port 104 is used for overload liquid drainage to ensure that the rock sample 600 is not corroded and safety of experimental instruments is ensured.
Referring to fig. 7, the radial confining pressure system 300 includes a motor 301, a lead screw push rod 302, a hydraulic loading cylinder 303, a second pressure gauge 304, a valve 305, and a sealing joint 306, and related hydraulic components can be reasonably selected according to experimental requirements. An output shaft of the motor 301 and a piston rod of the hydraulic loading cylinder 303 are both connected to the lead screw push rod 302, and the hydraulic loading cylinder 303, the second pressure gauge 304 and the valve 305 are sequentially connected through a conduit and communicated with the first liquid guide port 105 through a sealing joint 306. The radial confining pressure system 300 injects or leads out high-pressure liquid into or from the confining pressure loading bin 101, so that loading and adjustment of radial stress borne by the rock sample 600 are realized.
Preferably, the latex isolation film 109 is sealed with the outer wall of the loading piston 102 by the second annular sealing ring 108, so as to isolate the rock sample 600 from the high-pressure liquid injected by the radial confining pressure system 300, and prevent the high-pressure liquid from splashing into the rock sample 600 to affect the laser drilling effect thereof.
Referring to fig. 1, a laser emitting system is used to irradiate a rock sample 600 with laser light for drilling experiments. The laser emission system comprises a plant for generating laser beams required for experiments, which is shown only with a laser emission head 501, and a reference pose thereof is shown. The confining pressure loading bin 101 is mounted on a laser drilling experiment machine through a base 106.
Referring to fig. 1 and 4, the data information acquisition system includes an axial pressure sensor 403, an axial strain gauge 404, a radial pressure sensor 406, a radial strain gauge 405, a first camera 401 and a second camera 402, and is configured to acquire axial stress and radial stress data of the rock sample 600 and observe the injection condition of high-pressure liquid in the confining pressure loading chamber 101 and the surface laser drilling condition of the rock sample 600, where:
the axial pressure sensor 403 is mounted on top of the rock specimen 600, i.e. at the contact of the loading piston 102 with the rock specimen 600, for accurate measurement of the actual loaded axial stress σ3The axial strain gauge 404 is installed at the bottom of the rock sample 600 to accurately measure the actual axial deformation of the rock sample 600;
the radial pressure sensor 406 and the radial strain gauge 405 are both arranged on the side surface of the rock sample 600 to accurately measure the actually loaded radial stress sigma1The radial pressure sensors 406 and the radial strain gauges 405 are all in a group, a is more than or equal to 1 and is an integer, the radial pressure sensors 406 and the radial strain gauges 405 in the group a are axially distributed along the rock sample 600, in each group of radial pressure sensors 406 and radial strain gauges 405, the number of the radial pressure sensors 406 and the number of the radial strain gauges 405 in the group a are both b, b is more than or equal to 1 and is an integer, and the number of the radial pressure sensors 406 and the radial strain gauges 405 in the group b are alternately and uniformly distributed along the same horizontal height of the rock sample 600;
the first camera 401 is installed above the loading piston 102 and used for recording drilling information on the rock sample 600 in the drilling process, and the second camera 402 is installed outside the confining pressure loading bin 101 and used for recording changes of the rock sample 600 in the confining pressure loading process and changes of states in the confining pressure loading bin 101.
Preferably, the confining pressure loading bin 101 is made of tempered glass, so that the confining pressure loading bin has enough strength, and the second camera 402 on the outer side of the confining pressure loading bin 101 is favorable for recording the injection condition of the high-pressure liquid in the confining pressure loading bin 101.
Preferably, the upper end surface of the base 107 is of a concave ball type, so as to adapt to the deformation of the rock sample 600 and provide an installation space for the axial strain gauge 404.
Specifically, when the number of the hydraulic cylinders 201 is 4, the three-position four-way valve 205 is selected as the electromagnetic directional valve 205, and the working process of the axial loading system 200 is as follows: the hydraulic pump 204 starts to work, the electromagnetic directional valve 205 is positioned at the right position, hydraulic oil enters the rodless cavities of the 4 hydraulic cylinders 201, piston rods of the hydraulic cylinders 201 move downwards and are in contact with the upper end face of the loading piston 102, and the loading piston 102 is stressed and transmits axial thrust to the rock sample 600; when the pressure value measured by the axial pressure sensor 403 reaches the experimental preset axial loading stress sigma3When the electromagnetic directional valve 205 is in the middle position, the piston rods of the 4 hydraulic cylinders 201 keep the set pressure within a certain time (according to the confining pressure loading experiment and the drilling duration requirement); after the laser drilling experiment is completed, the electromagnetic directional valve 205 is in the left position, the piston rod of the hydraulic cylinder 201 retracts, the oil is removed from the loop, and the axial loading is completed.
Specifically, the working process of the radial confining pressure system is as follows: when the motor 301 is operated, the valve 305 is opened, the lead screw push rod 302 moves to the right, hydraulic oil in the hydraulic loading cylinder 303 enters the confining pressure loading bin 101 from the second liquid guide port 105 through the guide pipe, oil is continuously injected and pressurized, and at the moment, the height of the oil surface in the confining pressure loading bin 101 is continuously increased; when the pressure value measured by the radial pressure sensor 406 reaches the experimental preset radial loading stress sigma1When the drilling tool is used, the valve 305 is closed, and the pressure in the confining pressure loading bin 101 is maintained for a period of time (according to the confining pressure loading experiment and the drilling time requirement); after the laser drilling experiment is completed, the valve 305 is opened, the motor 301 rotates reversely, and the screw rodThe push rod 302 moves to the left, the loop is drained, and the radial confining pressure is completed.
In the confining pressure loading device, a control signal of a hydraulic control circuit, a start-stop signal of the motor 301, a reversing signal of the electromagnetic reversing valve 205, a switching signal of the valve 305 and the like are all sent out through a system control circuit. The information collected by the axial pressure sensor 403, the axial strain gauge 404, the radial pressure sensor 406, the radial strain gauge 405 and the first camera 401 and the second camera 402 is transmitted to a computer through a system control circuit for further analysis, display and storage.
Of course, the above is only the preferred embodiment of the present invention, and the application range of the present invention is not limited thereto, so all the equivalent changes made in the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a rock confined pressure loading device for laser is crept into experiment which characterized in that: the device comprises a confining pressure adding carrier (100), an axial loading system (200), a radial confining pressure system (300), a laser emission system and a data information acquisition system, wherein the confining pressure adding carrier (100) comprises a confining pressure loading bin (101), a loading piston (102) and a latex isolating membrane (109), the confining pressure loading bin (101) is a hollow cylinder with an upper end open, the outer bottom surface of the confining pressure adding carrier is fixed on a base (106), a base (107) for placing a rock sample (600) is arranged on the inner bottom surface of the confining pressure adding carrier, a through hole for laser to penetrate is formed in the center of the loading piston (102), the axial loading system (200) applies axial pressure to the loading piston (102), the loading piston (102) applies axial pressure to the rock sample (600), loading and adjustment of the axial stress borne by the rock sample (600) are achieved, the latex isolating membrane (109) is used for coating the rock sample (600), and the inner wall of the loading piston (102) and the confining pressure loading bin (101) is sealed through a first annular sealing The device comprises a confining pressure loading bin (101), a closed space is formed in the confining pressure loading bin (101), high-pressure liquid is injected into or led out of the confining pressure loading bin (101) through a radial confining pressure system (300), loading and adjustment of radial stress borne by a rock sample (600) are achieved, a latex isolating membrane (109) and the outer wall of a loading piston (102) are sealed through a second annular sealing ring (108), the high-pressure liquid injected into the rock sample (600) and the radial confining pressure system (300) is isolated, a laser emitting system is used for irradiating laser to the rock sample (600) to conduct a drilling experiment, a data information collecting system is used for collecting data of axial stress and radial stress borne by the rock sample (600) and observing the injection condition of the high-pressure liquid in the confining pressure loading bin (101) and the surface laser drilling condition of the rock sample (600).
2. The rock confining pressure loading device for the laser drilling experiment as recited in claim 1, wherein: be equipped with first drain hole (105) and second drain hole (104) on confined pressure loading storehouse (101) lateral wall, second drain hole (104) are located first drain hole (105) top, and second drain hole (104) are higher than rock sample (600) up end and are less than first ring packing (103) terminal surface down, and first drain hole (105) are used for leading into high-pressure liquid in to confined pressure loading storehouse (101), and second drain hole (104) are used for transshipping the flowing back.
3. The rock confining pressure loading device for the laser drilling experiment as recited in claim 1, wherein: the axial loading system (200) comprises a hydraulic control loop and a plurality of identical hydraulic cylinders (201), the hydraulic cylinders (201) are uniformly distributed right above the loading piston (102), the hydraulic control loop comprises an oil tank (202), an oil filter (203), a hydraulic pump (204), a pressure reducing valve (206), an overflow valve (207), a first pressure gauge (209), a cooler (208) and an electromagnetic directional valve (205), and the hydraulic cylinders (201) are communicated with the hydraulic control loop after being connected in parallel.
4. The rock confining pressure loading device for the laser drilling experiment as recited in claim 3, is characterized in that: a piston rod of the hydraulic cylinder (201) is provided with a hydraulic push plate (2010), and a rubber cushion pad (2011) is installed on the hydraulic push plate (2010).
5. The rock confining pressure loading device for the laser drilling experiment as recited in claim 4, is characterized in that: the upper end face of the loading piston (102) is provided with a positioning hole, the shape and the size of the positioning hole are the same as those of the rubber cushion pad (2011), and the positions of the positioning holes on the loading piston (102) correspond to the positions of the hydraulic cylinders (201) above the loading piston (102) one by one.
6. The rock confining pressure loading device for the laser drilling experiment as recited in claim 1, wherein: the radial confining pressure system (300) comprises a motor (301), a screw rod push rod (302), a hydraulic loading cylinder (303), a second pressure gauge (304), a valve (305) and a sealing joint (306), an output shaft of the motor (301) and a piston rod of the hydraulic loading cylinder (303) are connected to the screw rod push rod (302), and the hydraulic loading cylinder (303), the second pressure gauge (304) and the valve (305) are sequentially connected through a guide pipe and communicated with a first liquid guide port (105) through the sealing joint (306).
7. The rock confining pressure loading device for the laser drilling experiment as recited in claim 1, wherein: the data information acquisition system comprises an axial pressure sensor (403), an axial strain gauge (404), a radial pressure sensor (406), a radial strain gauge (405), a first camera (401) and a second camera (402), wherein the axial pressure sensor (403) is installed at the top of a rock sample (600), the axial strain gauge (404) is installed at the bottom of the rock sample (600), the radial pressure sensor (406) and the radial strain gauge (405) are installed on the side surface of the rock sample (600), the first camera (401) is installed above a loading piston (102), and the second camera (402) is installed on the outer side of a confining pressure loading bin (101).
8. The rock confining pressure loading device for the laser drilling experiment as recited in claim 7, wherein: the radial pressure sensors (406) and the radial strain gauges (405) are all in a group, a is larger than or equal to 1 and is an integer, the radial pressure sensors (406) and the radial strain gauges (405) in the group a are all distributed along the axial direction of the rock sample (600), in each group of radial pressure sensors (406) and radial strain gauges (405), the number of the radial pressure sensors (406) and the number of the radial strain gauges (405) are both b, b is larger than or equal to 1 and is an integer, and the b radial pressure sensors (406) and the radial strain gauges (405) are alternately and uniformly distributed along the same horizontal height of the rock sample (600).
9. The rock confining pressure loading device for the laser drilling experiment as recited in claim 7, wherein: the confining pressure loading bin (101) is made of toughened glass, so that the confining pressure loading bin has enough strength, and a second camera (402) on the outer side of the confining pressure loading bin (101) is facilitated to record the injection condition of high-pressure liquid in the confining pressure loading bin (101).
10. The rock confining pressure loading device for the laser drilling experiment as recited in claim 7, wherein: the upper end face of the base (107) is of a concave spherical shape, so that the deformation of the rock test sample (600) is adapted, and an installation space is provided for the axial strain gauge (404).
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| CN201921283005.4U CN211206053U (en) | 2019-08-08 | 2019-08-08 | Rock confining pressure loading device for laser drilling experiment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441157A (en) * | 2019-08-08 | 2019-11-12 | 中国地质大学（武汉） | A kind of rock confining pressure loading device for laser drilling experiment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441157A (en) * | 2019-08-08 | 2019-11-12 | 中国地质大学（武汉） | A kind of rock confining pressure loading device for laser drilling experiment |
| CN110441157B (en) * | 2019-08-08 | 2024-01-30 | 中国地质大学（武汉） | Rock confining pressure loading device for laser drilling experiment |
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