阅读说明：本技术 一种用于研究激光破岩技术的室内实验装置 (Indoor experimental device for researching laser rock breaking technology ) 是由 高明忠 周雪敏 刘军军 谢晶 杨本高 郝海春 李飞 温翔越 王轩 杨钊颖 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种用于研究激光破岩技术的室内实验装置,包括激光发生装置、吹气装置、实验腔体和光学平台,光学平台上设置有夹具,夹具用于夹持岩石样品,实验腔体设置在光学平台上且岩石样品位于实验腔体内,激光发生装置包括光纤激光器以及与光纤激光器连接的光纤准直聚焦头,光纤激光器用于发射不同功率的激光,光纤准直聚焦头设置在实验腔体内,光学平台可控制夹具上下移动、左右移动及旋转运动用于改变光纤准直聚焦头的离焦量,吹气装置用于破岩的过程中进行杂质清理,实验腔体内设置有成像相机和功率测试探头。研究激光在不同重复频率、不同脉冲宽度、不同功率作用下的破岩过程和机制,观察不同条件下的激光破岩效果,增强了实验测试范围。(The invention discloses an indoor experimental device for researching a laser rock breaking technology, which comprises a laser generating device, an air blowing device, an experimental cavity and an optical platform, wherein a clamp is arranged on the optical platform and used for clamping a rock sample, the experimental cavity is arranged on the optical platform, the rock sample is positioned in the experimental cavity, the laser generating device comprises an optical fiber laser and an optical fiber collimation focusing head connected with the optical fiber laser, the optical fiber laser is used for emitting laser with different powers, the optical fiber collimation focusing head is arranged in the experimental cavity, the optical platform can control the clamp to move up and down, left and right and rotate to change the defocusing amount of the optical fiber collimation focusing head, the air blowing device is used for cleaning impurities in the rock breaking process, and an imaging camera and a power testing probe are arranged in the experimental cavity. The rock breaking process and mechanism of the laser under the action of different repetition frequencies, different pulse widths and different powers are researched, the rock breaking effect of the laser under different conditions is observed, and the experimental test range is enlarged.)

1. The utility model provides an indoor experimental apparatus for studying broken rock technique of laser, its characterized in that, including laser generating device, gas blowing device, experiment cavity (5) and optical platform (1), be provided with anchor clamps (2) on optical platform (1), anchor clamps (2) are used for centre gripping rock sample, experiment cavity (5) set up on optical platform (1) and make rock sample be located experiment cavity (5), laser generating device includes fiber laser (3) and the optical fiber collimation focus head (4) of being connected with fiber laser (3), fiber laser (3) are used for transmitting the laser of different power, optical fiber collimation focus head (4) set up in experiment cavity (5), optical platform (1) steerable anchor clamps (2) reciprocate, control and remove and rotary motion, optical platform (1) is used for changing the defocusing volume of optical fiber collimation focus head (4), the gas blowing device is used for impurity cleaning in the rock breaking process, an imaging camera (6) and a power test probe (7) are arranged in the experiment cavity (5), the imaging camera (6) is used for shooting the rock sample surface rock breaking form, and the power test probe (7) is used for measuring the reflection power of the rock sample surface.

2. The indoor experimental device for studying the laser rock breaking technology according to claim 1, characterized in that a glass plate (8) is arranged in the experimental cavity (5), the glass plate (8) separates the experimental cavity (5) into a detection cavity (9) and an experimental cavity (10) from top to bottom, the imaging camera (6) is arranged in the detection cavity (9), the power test probe (7) is arranged in the experimental cavity (10), and a through hole (11) for laser to pass through is formed in the glass plate (8).

3. The indoor experimental device for researching the laser rock breaking technology is characterized in that a distance sensor (12) is arranged in the detection cavity (9), and the distance sensor (12) is used for detecting the rock breaking distance between a rock sample and the optical fiber collimation focusing head (4).

4. The indoor experimental device for researching the laser rock breaking technology according to claim 2, characterized in that an infrared thermometer (13) and two groups of infrared imagers (14) are arranged in the detection cavity (9), and the imaging camera (6), the infrared thermometer (13) and the two groups of infrared imagers (14) are circumferentially and uniformly distributed.

5. The indoor experimental device for researching the laser rock breaking technology as claimed in claim 1, wherein the blowing device comprises a gas tank (15) and a blowing pipe (16), one end of the blowing pipe (16) is connected with the gas tank (15), and the other end of the blowing pipe is connected with the optical fiber collimation focusing head (4).

6. A laboratory experimental setup for studying laser rock breaking techniques according to claim 5, characterized in that an exhaust pipe (17) is arranged on the experimental chamber (5), said exhaust pipe (17) being in communication with the experimental chamber (10).

7. The laboratory experimental apparatus for studying laser rock breaking technology as claimed in claim 1, characterized in that the laser generation device further comprises a laser water cooler (18), the laser water cooler (18) being connected with the fiber laser (3) for cooling the fiber laser (3).

Technical Field

The invention relates to the technical field of laser rock breaking, in particular to an indoor experimental device for researching a laser rock breaking technology.

Background

The oil and gas resources stored underground are quite rich, however, with the long-time exploitation, the development of underground mineral resources gradually moves to deepening, and the traditional drilling technology is difficult to effectively solve the drilling problem of deep complex formations in the face of the characteristics of high ground stress, high hardness of rocks, complex formations and the like of deep formations. The laser rock breaking technology also shows good application prospects in deep resource exploitation due to the advantages of low cost, high efficiency, high reliability and the like, and becomes a hotspot of research in recent years. In addition, as a high-energy-density rock breaking sharp tool, different parameters such as power, power density and the like are different from different rock samples in failure mechanism, and the prior art does not have a complete set of experimental device for researching the rock sample failure mechanism under different laser parameters, so that theory and data support cannot be provided on actual laser rock breaking, and the development of the laser rock breaking technology is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides an indoor experimental device for researching a laser rock breaking technology, researches the rock breaking process and mechanism of laser under the action of different repetition frequencies, different pulse widths and different powers, observes the rock breaking effect of the laser under different conditions, and has the characteristics of strong functionality and safe use.

The purpose of the invention is realized by the following technical scheme: an indoor experimental device for researching a laser rock breaking technology comprises a laser generating device, a blowing device, an experimental cavity and an optical platform, wherein a clamp is arranged on the optical platform and used for clamping a rock sample, the experimental cavity is arranged on the optical platform and enables the rock sample to be located in the experimental cavity, the laser generating device comprises a fiber laser and a fiber collimation focusing head connected with the fiber laser, the fiber laser is used for emitting laser with different powers, the fiber collimation focusing head is arranged in the experimental cavity, the clamp can be controlled by the optical platform to move up and down, move left and right and rotate, the optical platform is used for changing the defocusing amount of the fiber collimation focusing head, the blowing device is used for carrying out impurity cleaning in the rock breaking process, and an imaging camera and a power testing probe are arranged in the experimental cavity, the imaging camera is used for shooting the rock breaking form of the surface of the rock sample, and the power test probe is used for measuring the reflected power of the surface of the rock sample.

Further, be provided with the glass board in the experiment cavity, the glass board will the experiment cavity is separated from last to lower for detecting chamber and experiment chamber, imaging camera sets up detect the intracavity, the power test probe sets up in the experiment intracavity, set up the through-hole that supplies laser to pass on the glass board.

Further, a distance sensor is arranged in the detection cavity and used for detecting a rock breaking distance between the rock sample and the optical fiber collimation focusing head.

Furthermore, an infrared thermometer and two groups of infrared imagers are arranged in the detection cavity, and the imaging camera, the infrared thermometer and the two groups of infrared imagers are circumferentially and uniformly distributed.

Furthermore, the blowing device comprises a gas tank and a blowing pipe, one end of the blowing pipe is connected with the gas tank, and the other end of the blowing pipe is connected with the optical fiber collimation focusing head.

Further, be provided with the blast pipe on the experiment cavity, the blast pipe with the experiment cavity intercommunication.

Further, the laser generating device further comprises a laser water cooling machine, and the laser water cooling machine is connected with the optical fiber laser and used for cooling the optical fiber laser.

The invention has the beneficial effects that:

1. an indoor experimental device for researching a laser rock breaking technology changes the output frequency, the pulse width and the output power of an optical fiber collimation focusing head through an optical fiber laser, so that the laser rock breaking process and mechanism under the action of different repetition frequencies, different pulse widths and different powers are researched, and data support is provided for laser rock breaking.

2. The rock sample can be controlled to move up and down, left and right or rotate through the optical platform so as to change the position relation between the rock sample and the optical fiber collimation focusing head, and the research on rock breaking mechanisms with different defocusing amounts, the rock sample rotation radius and the rotation speed is realized.

3. The device is used for detecting the rock breaking distance between a rock sample and the optical fiber collimation focusing head through the distance sensor, the optical platform moves upwards through the feedback of the distance sensor in the rock breaking process, the rock breaking distance is kept unchanged in the rock breaking process, the optical fiber collimation focusing head is kept unchanged in defocusing amount to carry out rock breaking experiments on the rock sample, and the research on a rock breaking mechanism under the condition that the optical fiber collimation focusing head is kept unchanged in defocusing amount is researched.

4. The experimental conditions in the rock breaking process are detected and recorded in real time through the imaging camera, the optical fiber collimation focusing head outputs the rock breaking power, the reflected power of the rock sample is measured through the power test probe, and therefore the absorption energy of the rock sample is obtained, and the energy absorption condition of the rock sample under different powers of the optical fiber collimation focusing head is obtained.

5. The impurity of broken rock in-process is blown away through gas blowing device, prevents that impurity from causing the influence to the experimentation, avoids broken rock impurity to shelter from the shooting effect that the rock sample influences the imaging camera and the testing result of infrared temperature measurement equipment simultaneously, guarantees the accuracy of each testing result of broken rock in-process of laser.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an indoor experimental apparatus for studying a laser rock breaking technology according to the present invention;

FIG. 2 is a top view of a detection chamber in an indoor experimental apparatus for studying a laser rock breaking technique according to the present invention;

in the figure, 1-optical platform, 2-clamp, 3-fiber laser, 4-fiber collimation focusing head, 5-experiment cavity, 6-imaging camera, 7-power test probe, 8-glass plate, 9-detection cavity, 10-experiment cavity, 11-through hole, 12-distance sensor, 13-infrared thermometer, 14-infrared imager, 15-gas tank, 16-gas blowing pipe, 17-gas exhaust pipe and 18-laser water cooler.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

As shown in fig. 1 and fig. 2, an indoor experimental device for studying a laser rock breaking technology comprises a laser generating device, an air blowing device, an experimental cavity 5 and an optical platform 1, wherein a clamp 2 is arranged on the optical platform 1, the clamp 2 is used for clamping a rock sample, the experimental cavity 5 is arranged on the optical platform 1 and enables the rock sample to be located in the experimental cavity 5, the laser generating device comprises an optical fiber laser 3 and an optical fiber collimating focus head 4 connected with the optical fiber laser 3, the optical fiber laser 3 is used for emitting laser with different powers, the optical fiber collimating focus head 4 is arranged in the experimental cavity 5, the optical platform 1 can control the clamp 2 to move up and down, left and right and rotate, the optical platform 1 is used for changing the defocusing amount of the optical fiber collimating focus head 4, the air blowing device is used for impurity cleaning in a rock breaking process, an imaging camera 6 and a power testing probe 7 are arranged in the experimental cavity 5, the imaging camera 6 is used for shooting the rock breaking form of the surface of the rock sample, and the power test probe 7 is used for measuring the reflected power of the surface of the rock sample; the experimental process is as follows: the rock sample is placed on a clamp 2, the rock is clamped by the clamp 2, an experiment cavity 5 is placed on an optical platform 1, the rock sample is positioned in the experiment cavity 5, the clamp is controlled to move by the optical platform 1, the position direction of the rock sample and an optical fiber collimation focusing head 4 is adjusted, the output laser of the optical fiber collimation focusing head 4 is enabled to be opposite to the rock sample, the optical platform 1 drives the rock sample to move up and down for adjusting the defocusing amount of the optical fiber collimation focusing head 4, the rock breaking mechanism with different defocusing amounts, the rock sample rotation radius and rotation speed is researched, the output frequency, the pulse width and the output power of the optical fiber collimation focusing head are changed by an optical fiber laser 3, the laser rock breaking process and mechanism under the action of different repetition frequencies, different pulse widths and different powers are researched, and finally the rock breaking process of the laser is shot by an imaging camera 6, the rock breaking form of the surface of the rock sample is obtained, the reflected power of the rock sample is measured through the power test probe 7, so that the absorption energy of the rock sample is obtained, the energy absorption condition of the rock sample under different powers of the optical fiber collimation focusing head 4 is obtained, the influence of different parameters of laser on rock breaking can be researched by the experimental device, experimental data support is provided for actual rock breaking, laser with proper parameters can be conveniently selected according to the rock breaking experimental parameters of the laser in the actual rock breaking process, and the higher rock breaking effect is guaranteed. In specific implementation, the fiber laser 3 adopts a high-power laser, and the high-power laser has two working modes of CW/QCW, namely a power 2000W @ CW mode and a power not less than [email protected] QCW mode; the control of output power, output time, pulse width and the size of a light spot on the surface of the sample can be realized. The blowing device has the oxygen and nitrogen gas output function, is coaxial with the laser output of the optical fiber collimation focusing head, and can timely clean impurities; the bottom of the experimental cavity 5 is provided with an opening, the optical platform 1 comprises a fixed-height platform, an electric control lifting platform, an electric control translation platform, an electric control rotation platform and an angular displacement platform, the electric control lifting platform is arranged on the fixed-height platform, the electric control translation platform is arranged on the electric control lifting platform, the electric control rotation platform is arranged on the electric control translation platform, the angular displacement platform is arranged on the electric control rotation platform, the clamp 2 is arranged on the angular displacement platform, the experimental cavity 5 is arranged on the fixed-height platform, specifically, two groups of T-shaped slide rails are symmetrically fixed on the fixed-height platform, a T-shaped slide groove matched with the T-shaped slide rails is arranged at the bottom of the experimental cavity 5, when the experimental cavity 5 is installed, the experimental cavity 5 is directly slid into the fixed-height platform from one end of the T-shaped slide rails, so that the assembly and disassembly of the experimental device become simple and rapid, then the electric control lifting platform lifts the rock sample, so that the rock sample is positioned in the experimental cavity 5, the rock sample is driven to move horizontally through the electric control translation table, the rock sample is driven to rotate through the electric control rotating table, and the installation angle of the rock sample is finely adjusted through the angular displacement table, so that the research on the laser rock breaking technology under different requirements is realized.

Furthermore, a glass plate 8 is arranged in the experiment cavity 5, the experiment cavity 5 is divided into a detection cavity 9 and an experiment cavity 10 by the glass plate 8 from top to bottom, the imaging camera 6 is arranged in the detection cavity 9, the power test probe 7 is arranged in the experiment cavity 10, a through hole 11 for laser to pass through is arranged on the glass plate 8, the laser emitted by the optical fiber collimation focusing head 4 passes through the through hole 11 and acts on a rock sample, a distance sensor 12 is arranged in the detection cavity 9, the distance sensor 12 is used for detecting the rock breaking distance between the rock sample and the optical fiber collimation focusing head 4, the distance sensor 12 is fixed on the optical fiber collimation focusing head 4 in the rock breaking process, the optical platform 1 is moved upwards through the feedback of the distance sensor 12, specifically, after the defocusing amount of the optical fiber collimation focusing head 4 is determined, the distance between the optical fiber collimation focusing head 4 and the rock sample under the defocusing amount is detected through the distance sensor 12, after a laser rock breaking experiment is started, the distance between the optical fiber collimation focusing head 4 and the rock sample is increased along with the laser rock breaking, at the moment, the distance sensor 12 feeds back the change to enable the electric control lifting platform to act to drive the rock sample to ascend, the rock breaking distance is kept unchanged in the rock breaking process, further, the rock breaking experiment is carried out on the rock sample by keeping the defocusing amount of the optical fiber collimation focusing head 4 unchanged, and the research on a rock breaking mechanism under the condition that the defocusing amount of the optical fiber collimation focusing head 4 is kept unchanged is researched; an infrared thermometer 13 and two groups of infrared imagers 14 are arranged in the detection cavity 9, and the imaging camera 6, the infrared thermometer 13 and the two groups of infrared imagers 14 are uniformly distributed in a circle; the experiment cavity 5 is separated through the glass plate 8, the imaging camera 6, the infrared thermometer 13 and the infrared imager 14 are arranged in the detection cavity 9, and the influence on the experiment instrument and the measurement result caused by the fact that water vapor generated in the experiment process enters the equipment is prevented.

Further, the blowing device comprises a gas tank 15 and a blowing pipe 16, one end of the blowing pipe 16 is connected with the gas tank 15, the other end of the blowing pipe is connected with the optical fiber collimation focusing head 4, an exhaust pipe 17 is arranged on the experiment cavity 5, and the exhaust pipe 17 is communicated with the experiment cavity 10. Be equipped with pressure valve and flow valve on the gas tank 15, the adjustable atmospheric pressure and the volume of blowing out gas, 16 accessible of gas blow pipe are tied up the silk and are fixed on optic fibre collimation focusing head 4, and the blast pipe 16 timely exhaust gas avoids gaseous accomplishing to cause the influence to the experiment cavity environment after the broken rock of laser.

Further, the laser generating device further comprises a laser water cooling machine 18, and the laser water cooling machine 18 is connected with the fiber laser 3 and used for cooling the fiber laser 3.

In summary, the experimental device of the present invention can observe the influence of the laser generated by the fiber laser 3 in different power modes on the laser rock breaking effect, study the influence of different defocusing amounts and the rotating radius and rotating speed of the rock sample on the laser rock breaking effect, study the rock breaking mechanism under the condition that the defocusing amount of the fiber collimation focusing head 4 is not changed, and study the influence of the rock sample and the fiber collimation focusing head 4 on the laser rock breaking effect under different position relationships, so that the laser rock breaking process can be simulated indoors, the laser rock breaking effect under different conditions can be observed, and the experimental device has the advantages of strong functionality and safe use.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.