CN106918552B - Rock Friction Experimental Apparatus and Method - Google Patents

Abstract

The invention provides a rock friction experiment device and method. The rock friction experiment device includes a rock fixing component to be tested, a force applying component and a detection component. The rock fixing component to be measured includes a sliding groove and a fixing groove. The rock to be measured in the sliding groove and the rock to be measured in the fixing groove have opposite friction surfaces, and the sliding groove can slide relative to the fixing groove. The positive pressure applying mechanism in the force applying assembly applies pressure perpendicular to the sliding direction of the sliding groove, and the tangential force applying mechanism applies an acting force on the sliding groove along the sliding direction of the sliding groove. The displacement sensor in the detection component detects the moving distance of the sliding groove relative to the fixed groove, and the tension sensor detects the force when the tangential force applying mechanism drives the sliding groove to slide, so as to obtain the friction coefficient and friction strength of the rock to be tested. Therefore, the rock friction experimental device and method provided by the present invention are suitable for the experimental measurement of rocks with irregular shapes, and improve the accuracy of the experimental results.

Description

Rock Friction Experimental Apparatus and Method

technical field

The invention relates to a rock friction evaluation device and an evaluation method, in particular to a rock friction experiment device and method.

Background technique

Efficient development of unconventional oil and gas requires reservoir stimulation to create a fracture system with high conductivity in the reservoir to obtain industrial gas flow. Different from conventional oil and gas reservoirs, to obtain high production, the natural fractures of the reservoir must be activated to the greatest extent and shear slip occurs, so as to realize the interconnection between natural fractures. The friction coefficient and friction strength of fracture surfaces in shale reservoirs are one of the controlling factors for the formation of interpenetrating fracture network by natural fracture shear slip. As for whether shear slip occurs in natural fractures, there is no complete and practical evaluation method at home and abroad. In addition, the difficulty of coring shale is a restrictive factor for carrying out large-scale physical modeling experiments and simulating hydraulic fracturing on the ground to evaluate the fracture and network potential of reservoirs. Therefore, it is very important to use the irregular reservoir cuttings and rock blocks carried back to the surface by drilling fluid to evaluate the fracture surface friction coefficient. At present, there are no evaluation devices and evaluation methods that can realize this function at home and abroad. It is necessary to design a set of such devices in order to explore the conditions for shear slip in shale reservoirs and provide a theoretical basis for the application of reservoir reconstruction projects.

At present, the method commonly used to determine the friction strength and friction coefficient is the direct shear method. After the rock sample is processed, the friction surface of the shearing slide is manually polished until it is smooth and flat, and then placed in the upper and lower test boxes to ensure that the grinding surface is exposed. Then align the exposed parts of the upper and lower test boxes completely, place them on the hydraulic press, and fix the lower test box. At the beginning of the experiment, a positive pressure was applied directly above the upper experiment box, and a tangential force was applied laterally through the servo hydraulic machine. By changing the normal pressure and recording the tangential force and lateral displacement in the process, the friction strength under different normal pressure can be obtained.

However, the above-mentioned direct shear method mainly has the following disadvantages in the actual measurement process: using this scheme to conduct friction strength experiments requires fine cutting and grinding of the two friction surfaces of the rock sample, and has high requirements for sample processing. . Moreover, the surface of the polished rock is smooth and uniform, and the roughness is small, while the natural fracture surface is often characterized by strong heterogeneity and large roughness. The state of the polished surface and the natural fracture surface in the experiment is quite different, resulting in Experimental results are distorted.

Contents of the invention

The invention provides a rock friction experiment device and method suitable for the experiment measurement of rocks with irregular shapes, which can adapt to the complex environment of the drilling site, improve the accuracy of the experiment results, and facilitate the collection of experiment data and the analysis of the experiment results.

The invention provides a rock friction experiment device, which comprises a rock fixing component to be tested, a force applying component and a detecting component.

The rock to be tested fixing assembly comprises a sliding groove and at least one fixing groove, both the sliding groove and the fixing groove are used to place rocks to be tested with the same texture, and the rock to be tested in the sliding groove and the rock to be tested in the fixing groove have relative The friction surface, wherein the rocks to be tested are all embedded in the solidifiable material in the sliding groove or the fixed groove, and the sliding groove can slide relative to the fixed groove.

The force applying assembly includes a positive pressure applying mechanism and a tangential force applying mechanism. The positive pressure applying mechanism is used to apply pressure in a sliding direction perpendicular to the sliding groove, and the tangential force applying mechanism is used to apply a sliding force on the sliding groove along the sliding groove. direction force.

The detection component includes a displacement sensor and a tension sensor. The displacement sensor is used to detect the moving distance of the sliding groove relative to the fixed groove. The tension sensor is used to detect the force when the tangential force applying mechanism drives the sliding groove to slide. , the pressure and the relative contact area between the rock to be tested in the sliding groove and the rock to be tested in the fixed groove to obtain the friction coefficient of the rock to be tested and the friction strength of the rock to be tested.

The present invention also provides a rock friction test method, which is applied to the above-mentioned rock friction test device, including:

Step S1: installing the rock to be tested in the sliding groove and the fixing groove in the rock fixing assembly respectively, the rock to be tested in the sliding groove and the rock to be tested in the fixing groove have relative friction surface, wherein the rock to be tested is selected from the cuttings of the shale reservoir carried back to the bottom surface by the drilling fluid;

respectively applying pressure perpendicular to the sliding direction of the sliding groove and applying force along the sliding direction of the sliding groove to drive the sliding groove to slide relative to the fixing groove;

Step S2: detecting the moving distance of the sliding groove relative to the fixed groove and the force applied by the tangential force applying mechanism when the sliding groove is driven to slide;

Step S3: According to the moving distance, the acting force, the pressure and the relative contact area between the rock to be tested in the slide groove and the rock to be tested in the fixed groove to obtain the The friction coefficient of the rock to be tested and the friction strength of the rock to be tested.

The rock friction experiment device and method provided by the present invention simplifies the experimental process of the irregular rock by embedding the irregular rock into the solidifiable material, and saves the experimental cost; by integrating the various components of the experimental device, the experimental The device can adapt to the complex environment of the drilling site; the experimental data is collected in real time through computer automation, and the experimental results are analyzed synchronously to improve the accuracy of the experimental results and reduce the operational difficulty and complexity of the experimental process.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural view of a rock friction experiment device provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of a sliding groove or a fixed groove of the rock friction experiment device provided in Embodiment 1 of the present invention;

3 is a schematic structural view of the tension chamber of the rock friction test device provided in Embodiment 1 of the present invention;

Fig. 4 is the front view of the leveling device of the rock friction experiment device provided by Embodiment 1 of the present invention;

Fig. 5 is an attached view of the leveling device of the rock friction experiment device provided in Embodiment 1 of the present invention.

Explanation of reference signs:

10-rock fixing component to be tested; 20-force applying component; 30-detection component;

40-data processing component; 50-rock to be tested; 11-sliding groove;

12-fixing groove; 13-solidified material; 14-top wire;

21-positive pressure applying mechanism; 22-tangential force applying mechanism; 31-displacement sensor;

32-tension sensor; 33-tension chamber; 34-tension screw;

35-fixing bolt; 36-leveling device; 41-computer;

42-data transmission line; 221-traction motor; 222-traction steel rope;

361-cantilever beam; 362-support point; 363-leveling screw;

364 - Leveling screw holes.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Fig. 1 is a schematic structural view of the rock friction test device provided in the first embodiment of the present invention, Fig. 2 is a structural schematic view of the sliding groove or the fixed groove of the rock friction test device provided in the first embodiment of the present invention, and Fig. 3 is a schematic view of the first embodiment of the present invention Schematic diagram of the structure of the tension chamber of the provided rock friction test device, Fig. 4 is a front view of the leveling device of the rock friction test device provided in Embodiment 1 of the present invention, and Fig. 5 is a view of the rock friction test device provided in Embodiment 1 of the present invention Attached view of the leveling device.

As shown in FIGS. 1 to 5 , Embodiment 1 of the present invention provides a rock friction experiment device, which includes a rock fixing component 10 to be tested, a force applying component 20 and a detection component 30 .

The rock fixing assembly 10 to be measured comprises a sliding groove 11 and at least one fixing groove 12, the sliding groove 11 and the fixing groove 12 are all used to place the rock to be measured 50 of the same texture, and the rock to be measured in the sliding groove 11 and the fixing groove The rock 50 to be tested in 12 has opposite friction surfaces, wherein the rock 50 to be tested is embedded in the solidifiable material 13 in the sliding groove 11 or the fixing groove 12 , and the sliding groove 11 can slide relative to the fixing groove 12 .

The force application assembly 20 includes a positive pressure application mechanism 21 and a tangential force application mechanism 22. The positive pressure application mechanism 21 is used to apply pressure in the sliding direction perpendicular to the sliding groove 11, and the tangential force application mechanism 22 is used to apply pressure on the sliding groove 11. Apply a force along the sliding direction of the sliding groove 11.

The detection assembly 30 includes a displacement sensor 31 and a tension sensor 32. The displacement sensor 31 is used to detect the moving distance of the sliding groove 11 relative to the fixed groove 12, and the tension sensor 32 is used to detect the effect of the tangential force applying mechanism 22 driving the sliding groove 11 to slide. Force, to obtain the friction coefficient of the rock to be measured 50 and the rock to be measured 50 according to the relative contact area between the rock to be measured 50 in the sliding groove 11 and the rock to be measured 50 in the fixed groove 12 according to moving distance, action force, pressure and friction strength.

It should be noted that, in the experimental process of this rock friction test device, the rock 50 to be tested that has been embedded in the solidifiable material 13 is first fixed in the fixing groove 12 and the sliding groove 11, and the fixing groove 12 and the sliding groove 11 are installed, so that The rock 50 to be tested in the fixing groove 12 and the sliding groove 11 is in relative contact. In the first embodiment of the present invention, the irregularly shaped rock 50 to be tested is embedded in the solidifiable material 13, and the surface to be tested of the rock 50 to be tested is exposed when its surface is polished, so that the rock to be tested 50 and the The relative contact area between the rocks 50 to be tested in the fixed groove 12 is convenient for measurement or calculation, and the exposed surface to be tested can be ground into a regular shape, such as a circle or a square, and then according to the measurement or calculation of two relatively sliding rocks to be tested Relative contact area between rocks 50 . Avoid directly grinding the rock 50 to be tested, so that the texture structure of the surface of the rock 50 to be tested will change, resulting in distortion of the final experimental result.

Utilize the tangential force application mechanism 22 in the force application assembly 20 to drive the sliding groove 11 to move relative to the fixing groove 12, so that relative sliding occurs between the sliding groove 11 and the fixing groove 12, and the objects fixed in the sliding groove 11 and the fixing groove 12 The rocks 50 to be measured also slide relative to each other to generate friction, and the specific value of the force is read through the tension sensor 32 , and the specific value of the moving distance of the sliding groove 11 can be read through the displacement sensor 31 . The positive pressure applying mechanism 21 in the force applying component 20 applies stress in a direction perpendicular to the movement direction of the sliding groove 11. The normal stress applying mechanism can be a weight, so the specific value of the stress can be directly obtained by reading. After obtaining the specific values of the relative contact area, moving distance, force and pressure, the friction coefficient and friction strength between the rocks 50 to be tested can be calculated according to the following friction coefficient formula (1) and friction strength formula (2).

Wherein, μ is the coefficient of friction; T is the force applied by the tangential force applying mechanism 22 to drive the slide groove 11 to slide, and the unit is N; F _N is the stress applied by the positive pressure applying mechanism 21, and the unit is N.

Among them, σ is the friction strength, and the unit is Pa; T is the force that the tangential force applying mechanism 22 drives the sliding groove 11 to slide, and the unit is N; The relative contact area between the rocks 50 is measured, and the unit is m ² .

It should be noted that the rock friction experimental device provided in Embodiment 1 of the present invention also includes an experimental bench (not shown in the figure) arranged at the bottom of the rock fixing assembly 10 to be tested, the force application assembly 20 and the detection assembly 30. The surface of the test bench is flat, which is conducive to the placement and fixing of various components. A shock-absorbing device is also provided at the bottom of the test bench for slowing down the vibration generated by the sliding groove 11 during movement. Therefore, the test bench can ensure that the rock friction test device can run smoothly even in complex drilling sites, and improve the accuracy of the test results.

Specifically, the rock friction experiment device also includes a data processing component 40, the data processing component 40 and the detection component 30 have an electrical connection, and the data processing component 40 is used to detect the movement distance detected by the detection component 30, the detection component 30 detected The friction coefficient of the rock 50 to be tested and the friction strength of the rock 50 to be tested are obtained by using the force, the pressure applied by the positive pressure applying mechanism 21 and the relative contact area.

It should be noted that the rock friction experiment device provided in Embodiment 1 of the present invention collects, records and processes experimental data through the data processing component 40, adapts to the complex environment of the drilling site, and ensures the accuracy of the experimental data.

Optionally, the rock fixing assembly 10 to be measured comprises a sliding groove 11 and a fixing groove 12, and the notches of the sliding groove 11 and the fixing groove 12 are placed oppositely, so that the surface of the rock to be measured 50 fixed in the sliding groove 11 and the fixed The surfaces of the rocks 50 to be tested fixed in the groove 12 are in contact with each other.

It should be noted that the rock friction experiment can include unilateral shear friction and double-sided shear friction, and the two types of friction characterize the shear friction process between rocks in different geological environments. Wherein the unilateral shear friction can be determined by setting a sliding groove 11 and a fixing groove 12 in the rock fixing assembly 10 to be tested, and only one side of the rock to be tested 50 in the sliding groove 11 and the fixing groove 12 is in contact with each other, thus characterizing the formation rock A process in which shear friction occurs on one side when pressure is applied.

Optionally, the rock fixing assembly 10 to be tested includes a sliding groove 11 and two fixing grooves 12, the groove bottom of the sliding groove 11 has an opening opposite to the notch of the sliding groove 11, and the rock to be tested located in the sliding groove 11 The rock 50 has two side surfaces respectively exposed outside the notch and the opening, and the fixing grooves 12 are arranged on opposite sides of the sliding groove 11 respectively, and the notch of the sliding groove 11 is opposite to the notch and the opening of the fixing groove 12 respectively, so that The two side surfaces of the rock 50 to be tested in the slide groove 11 are respectively in contact with the surfaces of the rock 50 to be tested in the fixed groove 12 .

It should be noted that, in addition to the above-mentioned unilateral shear friction test mode, this embodiment also provides a double-sided shear friction test mode, by setting a sliding groove 11 and two fixing grooves 12 in the rock fixing component 10 to be tested, Both sides of the slide groove 11 are respectively provided with notches and openings, and the surfaces on both sides of the rock 50 to be measured in the slide groove 11 are respectively in contact with the surfaces of the rock 50 to be measured in the fixed groove 12 on both sides of the slide groove 11. The rock measuring fixing assembly 10 is subjected to the stress applied by the normal stress applying mechanism, and the sliding groove 11 located between the two fixing grooves 12 moves at the same time. Friction occurs on the surface of the rock 50, which is used to simulate the process of shear friction occurring on both sides of the geodetic rock after it is under pressure.

Further, the tangential force applying mechanism 22 includes a traction motor 221 and a traction steel rope 222 , one end of the traction steel rope 222 is connected to the output shaft of the traction motor 221 , and the other end of the traction steel rope 222 is fixedly connected to the sliding groove 11 .

It should be noted that the tangential force applying mechanism 22 is that the output shaft of the traction motor 221 is connected to the traction steel rope 222, and the other end of the traction steel rope 222 is fixedly connected with the sliding groove 11, so the traction motor 221 can drive the sliding groove 11 to move. The traction motor 221 can be a micro motor, a servo hydraulic machine or an air motor, etc., and it only needs to provide power for the movement of the sliding groove 11, which is not limited in the embodiment of the present invention. Specifically, the traction motor 221 can be manually controlled, or connected to a control device, and controlled by setting relevant experimental procedures according to experimental requirements.

Specifically, the data processing assembly 40 includes a computer 41 and a data transmission line 42 for respectively connecting the computer 41 with the displacement sensor 31 and the tension sensor 32; The coefficient of friction of the rock 50 to be tested and the friction strength of the rock 50 to be tested are obtained through calculation with the relative contact area.

It should be noted that the rock friction experiment device collects, records and analyzes data through a computer 41, and the computer 41 is electrically connected to the data transmission interfaces of the displacement sensor 31 and the tension sensor 32 through the data transmission line 42, and the computer 41 receives and collects data respectively by The moving distance of the sliding groove 11 detected by the displacement sensor 31 and the tension sensor 32 and the force driving the sliding groove 11 to move, and at the same time according to the stress applied by the normal stress applying mechanism and the four data of the relative contact area of the rock 50 to be tested obtained by measurement and calculation, The friction coefficient and friction strength of the rock 50 to be tested are respectively calculated according to the above-mentioned friction coefficient calculation formula (1) and friction strength calculation formula (2). Correspondingly, the computer 41 is equipped with modules for data collection, data storage and data processing.

Specifically, as shown in Figures 4 and 5, the detection assembly 30 also includes a tension chamber 33, the tension sensor 32 is installed in the tension chamber 33 through a tension screw 34 and a fixing bolt 35, and the tension screw 34 and the fixing bolt 35 are respectively fixed to the tension chamber 33. At opposite ends of the sensor 32 , the tension screw 34 is connected with the traction steel rope 222 .

Specifically, the tension chamber 33 also includes a leveling device 36, which is installed at the bottom of the tension sensor 32 for adjusting and eliminating the inclination angle of the tension sensor 32 in the horizontal direction;

The leveling device 36 includes at least two suspension beams 361, at least two suspension beams 361 are fixed side by side at the bottom of the tension chamber 33, and the height of the suspension beams 361 in the vertical direction is adjustable, and at least one support point 362 is pierced on each suspension beam 361, The tension sensor 32 is placed on the supporting point 362;

The end of each suspension beam 361 is provided with a leveling screw 363 in the vertical direction to adjust the height of the suspension beam 361 in the vertical direction.

It should be noted that the tension sensor 32 in the detection assembly 30 is arranged in the tension chamber 33, and is respectively fixed at its two ends by the fixing bolt 35 and the tension screw 34, and the tension screw 34 is connected with the traction steel rope 222 for connecting The slide groove 11 at the other end of the tension sensor 32 provides power. A leveling device 36 is also provided at the bottom of the tension sensor 32. The leveling device 36 is composed of at least two suspension beams 361 and a support point 362 pierced on the suspension beams 361. The tension sensor 32 is placed on the support point 362. The end of the suspension beam 361 is passed through the leveling screw hole 364 on the side wall of the tension chamber 33, and a leveling screw 363 is provided in the vertical direction. The leveling screw 363 abuts against the end of the suspension beam 361. 363 in the vertical direction to adjust the height of the suspension beam 361 end. Only the leveling screw 363 on one side of the tension chamber 33 is shown in Fig. 5, and the same leveling screw 363 is also provided on the opposite side of the tension chamber 33, and the two ends of the suspension beam 361 are respectively adjusted from the two ends of the suspension beam 361 in the vertical direction. height, eliminate the inclination angle of the tension sensor 32 in the horizontal direction, and prevent the detection error caused by the tension sensor 32 due to inclination.

Optionally, the curable material 13 is epoxy resin, and the edge shape of the epoxy resin embedded with the rock 50 to be tested matches the shape of the sliding groove 11 or the fixing groove 12, and the sliding groove 11 or the fixing groove 12 is provided with There is a top wire 14 that can be tightened on the epoxy resin so that the epoxy resin and the sliding groove 11 or the fixing groove 12 are relatively fixed.

It should be noted that the rock sample size of the rock friction experiment device provided in this embodiment is relatively small, and a rock sample of 2-5 mm is generally selected. The rock 50 with irregular shape to be tested is fixed by the solidified material 13, and then the solidified material 13 embedded in the rock 50 to be tested is placed in the sliding groove 11 or the fixed groove 12, and the solidified material 13 is tightened by the jacking wire 14, Prevent it from loosening during sliding.

Wherein, the curable material 13 is a thermosetting material, which can be selected from phenolic resin, epoxy resin or silicone resin, polyurethane, etc., which is not limited in this embodiment. The material becomes a liquid substance after being heated for the first time, and after the rock 50 to be tested is placed, the thermosetting material is left to solidify to become an insoluble and infusible solid substance, and the rock 50 to be tested can be fixed by this material.

The rock friction experiment device provided by Embodiment 1 of the present invention simplifies the experimental process of the irregular rock by embedding the irregular rock into the solidifiable material 13, and saves the experimental cost; by integrating the various components of the experimental device, the The experimental device can adapt to the complex environment of the drilling site; the computer 41 automatically collects the experimental data in real time, and analyzes the experimental results synchronously to improve the accuracy of the experimental results and reduce the operational difficulty and complexity of the experimental process.

Embodiment 2 of the present invention also provides a rock friction test method, which is applied to the above-mentioned rock friction test device, including:

Step S1: install the rock 50 to be tested in the sliding groove 11 and the fixing groove 12 in the rock fixing assembly 10 respectively, the rock 50 in the sliding groove 11 and the rock in the fixing groove 12 The rock to be tested 50 has opposing friction surfaces, wherein the rock to be tested 50 is screened from the cuttings of the shale reservoir carried back to the bottom surface by the drilling fluid;

respectively applying pressure perpendicular to the sliding direction of the sliding groove 11 and applying force along the sliding direction of the sliding groove 11 to drive the sliding groove 11 to slide relative to the fixing groove 12;

Step S2: detecting the moving distance of the sliding groove 11 relative to the fixed groove 12 and the force applied by the tangential force applying mechanism 22 when the sliding groove 11 is driven to slide;

Step S3: According to the moving distance, the acting force, the pressure and the relative contact between the rock 50 to be tested in the sliding groove 11 and the rock 50 to be measured in the fixed groove 12 area to obtain the friction coefficient of the rock to be tested 50 and the friction strength of the rock to be tested 50 .

It should be noted that Embodiment 2 of the present invention provides a rock friction test method. First, the cuttings carried in the drilling fluid are screened as the rock 50 to be tested, and the rock 50 to be tested is fixed to the slide groove 11 or fixed slot 12. The fixed groove 12 and the sliding groove 11 are installed, and one-side shear friction and two-side shear friction experiment modes can be selected according to experimental needs. The active force application component 20 is started, so that the sliding groove 11 moves relative to the fixed groove 12, and sliding friction is generated between the rocks 50 to be tested. , the stress applied by the normal stress applying mechanism and the relative contact area between the rock 50 to be measured in the sliding groove 11 and the rock 50 to be measured in the fixed groove 12, according to the friction coefficient calculation formula (1) and the friction strength calculation formula (2 ) calculation, the friction strength and friction coefficient of the rock 50 to be tested are obtained, and the experiment process is completed.

The rock friction experiment method provided by Embodiment 2 of the present invention simplifies the experimental process of the irregular rock by embedding the irregularly shaped rock into the solidifiable material 13, and saves the experimental cost; by integrating the various components of the experimental device, the The experimental device can adapt to the complex environment of the drilling site; the computer 41 automatically collects the experimental data in real time, and analyzes the experimental results synchronously to improve the accuracy of the experimental results and reduce the operational difficulty and complexity of the experimental process.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (6)

1. A rock friction experiment device, characterized in that, comprises a rock fixing assembly to be measured, an active force applying assembly and a detection assembly; The rock to be tested fixing assembly includes a sliding groove and at least one fixing groove, both of the sliding groove and the fixing groove are used to place rocks to be tested with the same texture, and the rock to be tested in the sliding groove and the The rock to be tested in the fixed groove has opposite friction surfaces, wherein the rock to be tested is embedded in the sliding groove or the solidifiable material in the fixed groove, and the sliding groove can be opposed to The fixing groove slides; The force applying assembly includes a positive pressure applying mechanism and a tangential force applying mechanism, the positive pressure applying mechanism is used to apply pressure in a sliding direction perpendicular to the sliding groove, and the tangential force applying mechanism is used to apply pressure in the sliding direction perpendicular to the sliding groove. Applying an active force along the sliding direction of the sliding groove on the sliding groove; The detection component includes a displacement sensor and a tension sensor, the displacement sensor is used to detect the moving distance of the sliding groove relative to the fixed groove, and the tension sensor is used to detect that the tangential force applying mechanism drives the sliding The active force when the groove slides is based on the relative distance between the moving distance, the active force, the pressure and the rock to be measured in the sliding groove and the rock to be measured in the fixed groove Obtain the friction coefficient of the rock to be measured and the friction strength of the rock to be measured by the contact area; The tangential force applying mechanism includes a traction motor and a traction steel rope, one end of the traction steel rope is connected to the output shaft of the traction motor, and the other end of the traction steel rope is fixedly connected to the sliding groove; The detection assembly also includes a tension chamber, the tension sensor is installed in the tension chamber through a tension screw and a fixing bolt, the tension screw and the fixing bolt are respectively fixed at opposite ends of the tension sensor, the tension The screw rod is connected with the traction steel rope; The tension chamber also includes a leveling device installed at the bottom of the tension sensor for adjusting and eliminating the inclination angle of the tension sensor in the horizontal direction; The leveling device includes at least two suspension beams, the at least two suspension beams are fixed side by side at the bottom of the tension chamber, and the height of the suspension beams in the vertical direction can be adjusted, and each suspension beam passes through At least one support point, the tension sensor is placed on the support point; Each end of the cantilever beam is provided with a leveling screw in the vertical direction to adjust the height of the cantilever beam in the vertical direction. 2. rock friction experiment device according to claim 1, is characterized in that, also comprises data processing assembly, and described data processing assembly and described detection assembly have electric connection, and described data processing assembly is used for according to described detection assembly The detected moving distance, the active force detected by the detection assembly, the pressure applied by the positive pressure applying mechanism and the relative contact area obtain the friction coefficient and the measured rock's coefficient of friction. Describe the friction strength of the rock to be tested. 3. The rock friction test device according to claim 1 or 2, characterized in that, the rock fixing assembly to be tested comprises one of the sliding grooves and one of the fixing grooves, the sliding groove and the fixing groove The notches are placed opposite to each other, so that the surface of the rock to be measured fixed in the sliding groove and the surface of the rock to be measured fixed in the fixing groove are in contact with each other. 4. The rock friction test device according to claim 1 or 2, wherein the rock fixing assembly to be tested comprises one sliding groove and two fixing grooves, and the groove bottom of the sliding groove has and The notch of the sliding groove is opposite to the opening, and the rock to be tested in the sliding groove has two side surfaces respectively exposed outside the notch and the opening, and the fixing grooves are respectively set On opposite sides of the sliding groove, the notch and the opening of the sliding groove are respectively opposite to the notch of the fixing groove, so that the two side surfaces of the rock to be measured in the sliding groove are respectively in contact with the The surfaces of the rocks to be tested in the fixing grooves are in contact with each other. 5. rock friction experiment device according to claim 2, is characterized in that, described data processing assembly comprises computer and is used to connect the data transmission line of described computer and described displacement sensor and described tension sensor respectively; for storing the moving distance and the acting force, and calculating and obtaining the friction coefficient of the rock to be tested and the rock to be tested according to the moving distance, the acting force, the pressure and the relative contact area friction strength. 6. The rock friction test device according to claim 1, wherein the solidified material is epoxy resin, and the edge shape of the epoxy resin of the rock to be tested and the sliding groove are embedded. Or the shape of the fixing groove matches, and the sliding groove or the fixing groove is provided with a device that can be pressed against the epoxy resin, so that the epoxy resin and the sliding groove or the fixing The groove is relatively fixed to the top wire.