A high-efficiency rock breaking evaluation device

Abstract

The present application relates to the technical field of rock mass mechanics test, and proposes a high-efficiency rock breaking evaluation device, which comprises a base, a confining pressure shearing mechanism, an inclination control mechanism and a rotary impact mechanism, the confining pressure shearing mechanism is used for placing a rock sample and applying confining pressure and shearing force to the circumferential side and top side of the rock sample, the inclination control mechanism is used for generating an inclination angle of the rock sample, the rotary impact mechanism is used for rotating and impacting the rock sample to achieve a rotary impact rock breaking experiment, and a heating mechanism is used for heating the rock sample, which solves the problems of simulating the complex environment of high temperature and high pressure, dynamic-static load coupling and shearing in the deep stratum drilling process, realizes the axial impact and torsional impact of the drill bit on the rock in the deep rock dynamics research and rotary drilling process, and explores the rock breaking effect of the axial impact and torsional impact with different frequencies, different intensities and different angles on the rock under different confining pressures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rock mass mechanics test, in particular to a high-efficiency rock breaking evaluation device. BACKGROUND

[0002] Deep strata contain rich oil and gas resources, and current drilling engineering has entered the era of deep well and ultra-deep well drilling, and has begun to march into the 10,000-meter deep strata, so the demand for rock mechanics and high-efficiency rock breaking of deep strata is imminent. Deep strata drilling faces many problems. On the one hand, in the vertical direction, the lithology is complex, and hard and soft strata are staggered, and in the horizontal direction, the deep strata have the characteristics of strong heterogeneity. On the other hand, the deep strata are difficult to drill, and have high hardness, strong abrasiveness, and high rock mechanics strength. In deep high-temperature geothermal drilling, especially in granite strata, the problems of slow mechanical speed, poor tool adaptability, and small single-trip footage exist, so a rock breaking evaluation device is needed to provide a theoretical basis for drilling parameter optimization, tool selection, and bit design.

[0003] The existing rock breaking evaluation equipment can only reflect the drillability and abrasiveness of rock under laboratory conditions. Some equipment simulates the pressure environment of deep strata through a triaxial loading system, but does not consider the high-temperature environment of the strata. In fact, in the process of deep and ultra-deep drilling, the high temperature of the strata itself has become an important factor that cannot be ignored in various scientific and engineering problems. Some equipment solves the problems of simulating high temperature and high pressure, dynamic-static load coupling, and other complex environments in the process of deep strata drilling, but does not consider the bit inclination and rock shear failure. Therefore, the existing rock breaking evaluation equipment cannot completely reflect the rock breaking environment of deep strata. SUMMARY

[0004] The purpose of the present application is to provide a high-efficiency rock breaking evaluation device, which solves the problems of simulating high temperature and high pressure, dynamic-static load coupling, shear, and other complex environments in the process of deep strata drilling, realizes the research of deep rock dynamics and the axial impact and torsional impact of the drill teeth on the rock in the process of rotary drilling, and explores the rock breaking effect of different frequencies, different intensities, and different angles of axial impact and torsional impact on the rock under different confining pressures.

[0005] To solve the above technical problems, the technical solution adopted by the present application is as follows:

[0006] The embodiment of the application provides a high-efficiency rock breaking evaluation device, which comprises a base, the base is used for bearing a confining pressure shearing mechanism, an inclination control mechanism and a rotary impact mechanism, the base is provided with an inclination support frame, the confining pressure shearing mechanism is rotationally connected with the inclination support frame, the confining pressure shearing mechanism is used for placing a rock sample and applying confining pressure and shearing force to the circumferential side and the top side of the rock sample, the inclination control mechanism is fixedly connected with the base, an output end of the inclination control mechanism is rotationally connected with the confining pressure shearing mechanism, so that the confining pressure shearing mechanism generates an inclination angle with the inclination support frame as an axis, the rotary impact mechanism is detachably connected with the base, is used for rotary impact breaking of the rock sample, and realizes a rotary impact rock breaking experiment, and a heating mechanism, the heating mechanism is arranged in the confining pressure shearing mechanism and is used for heating the rock sample.

[0007] Through the confining pressure shearing mechanism, the rock sample can receive the confining pressure in the horizontal direction and the shearing force in the vertical direction, the problems of dynamic-static load coupling and shearing in the deep stratum drilling process are simulated, the inclination control mechanism can make the rock sample form different inclination angles, the problem that the stratum is not always flat and exists different angles in the deep stratum drilling process is simulated, the real stratum environment is simulated, the heating mechanism is used for heating the rock sample, the high-temperature operation environment of the stratum in the deep stratum drilling process is simulated, a more real and reliable scientific basis is provided, the technical problem that the stratum temperature simulation is ignored in the prior art is solved, and the rotary impact mechanism can simulate the axial impact and torsional impact caused by the drill bit to the rock in the drilling process, so that the rock breaking effect of the rock under different confining pressure under different frequencies, different intensities and different angles of axial impact and torsional impact is explored, more real and accurate data support is provided for rock breaking efficiency evaluation, and a technical means is provided for researching the mechanical behavior and mechanism of the deep stratum rock dynamics and the impact rock breaking process.

[0008] In some embodiments of the application, the confining pressure shearing mechanism comprises a loading frame, three confining pressure loading pumps, two square rods, a transmission rod, two shearing loading pumps and two shearing force transmission mechanisms, the loading frame is rotationally connected with the inclination support frame through an inclination bearing, and a central part of the loading frame is provided with an accommodation cavity for accommodating the rock sample; the three confining pressure loading pumps are located at two horizontal ends and a top end of the loading frame, one end of the transmission rod is connected with the confining pressure loading pump located at the top end, and the other end of the transmission rod is in communication with the accommodation cavity; one end of one square rod is connected with the confining pressure loading pump located at one horizontal end, and the other end of the square rod is in communication with the accommodation cavity; one end of the other square rod is connected with the confining pressure loading pump located at the other horizontal end, and the other end of the square rod is also in communication with the accommodation cavity; the two shearing loading pumps are located at two vertical ends of the loading frame, and the two shearing loading pumps are respectively connected with a shearing force transmission mechanism, and the two shearing force transmission mechanisms are in communication with the accommodation cavity.

[0009] The three confining pressure loading pumps can apply horizontal confining pressure to the rock sample, the true triaxial system is adopted to simulate high confining pressure environment, the confining pressure generated by the confining pressure loading pump is transmitted to the rock sample through a square rod and a transmission rod, the two shear loading pumps can apply shear force to the rock sample in the vertical direction, the shear force generated by the shear loading pump is transmitted to the rock sample through a shear force transmission device, the problems of dynamic-static load coupling and shear in the stratum are simulated, and the accuracy and reliability of the evaluation data of the rock breaking efficiency are improved.

[0010] In some embodiments of the present application, the three confining pressure loading pumps can simultaneously provide different confining pressures, and the two shear loading pumps can simultaneously provide different shear forces, so as to simulate the actual situation that the rock is not uniformly stressed in the circumferential direction in the stratum environment, make the simulation device closer to the real stratum environment, and make the experimental data more true and accurate.

[0011] In some embodiments of the present application, the shear force transmission mechanism includes a shear rod, an upper baffle, a lower baffle and a plurality of balls, one end of the shear rod is connected with the shear loading pump, the other end is connected with the upper baffle, one side of the lower baffle is connected with the side of the upper baffle away from the shear rod, the other side of the lower baffle is in communication with the accommodating cavity, and a plurality of balls are arranged between the lower baffle and the upper baffle.

[0012] The shear force generated by the shear loading pump is transmitted to the upper baffle through the shear rod, is transmitted to the lower baffle from the upper baffle, and is transmitted to the rock sample from the lower baffle, the lower baffle can uniformly transmit the shear force to the rock sample, ensure that the rock sample receives uniform shear force, the balls can offset the lateral friction, reduce the force loss of the shear force in transmission, and exclude factors affecting the experimental data, so that the experimental results are more accurate.

[0013] In some embodiments of the present application, the inclination control mechanism includes a hydraulic rod device and a roller, the fixed end of the hydraulic rod device is connected with the base, and the output end of the hydraulic rod device is rotatably connected with the top end of the loading frame through the roller.

[0014] The inclination control mechanism includes a hydraulic rod device and a roller, the fixed end of the hydraulic rod device is connected with the base, and the output end of the hydraulic rod device is rotatably connected with the top end of the loading frame through the roller.

[0015] In some embodiments of the present application, the rotating impact mechanism comprises an impact platform, an impact rod, an impact head, an impact rod support and an impact generator, the impact platform is detachably connected with the base, the impact platform is provided with a center guide rail, the impact rod support is connected with the impact platform and located above the center guide rail, the impact generator is connected with the base, the impact rod is located on the impact rod support, the input end of the impact rod is connected with the impact generator through a flange, the output end of the impact rod is connected with the impact head, and the impact head is communicated with the containing cavity.

[0016] Through the above structure, the axial impact generated by the impact generator can be transmitted to the rock sample, and axial impact forces with different frequencies and intensities can be provided to meet the needs of different experiments.

[0017] In some embodiments of the present application, the impact head comprises a conversion joint, a clamp and a drill bit, one end of the conversion joint is connected with the impact rod, the other end is connected with the clamp, and the clamp is detachably connected with the drill bit.

[0018] The axial impact generated by the impact generator is transmitted to the drill bit through the conversion joint, and then the drill bit acts on the rock sample to realize the axial impact of the rock sample. The clamp can hold the unused drill bit to meet the needs of different experiments.

[0019] In some embodiments of the present application, the rotating impact mechanism further comprises a motor, a motor platform, a synchronous belt, a large-diameter synchronous gear and a small-diameter synchronous gear, the motor platform is connected with the base, the motor is located on the motor platform, the small-diameter synchronous gear is connected with the output end of the motor, the large-diameter synchronous gear is sleeved on the impact rod, and the large-diameter synchronous gear is connected with the small-diameter synchronous gear through the synchronous belt.

[0020] By setting the motor and gear combination, the impact rod can achieve a rotating effect to form a torsional impact on the rock sample, so that the torque generated by the motor acts on the rock sample to realize a rotating impact rock breaking test.

[0021] In some embodiments of the present application, the heating mechanism is composed of a plurality of resistance wires, and the plurality of resistance wires are respectively located on the two square rods, the transmission rod and the two lower baffles.

[0022] By setting a plurality of resistance wires, the rock sample can be uniformly heated, the rock sample can be uniformly heated, the required test temperature can be quickly reached, the operation environment of the high temperature stratum can be simulated, the rock breaking experiment can be carried out at high temperature, and more real and accurate experimental data can be provided.

[0023] In some embodiments of the present application, in the rotating impact rock breaking test, the impact generator, the flange, the large-diameter synchronous gear, the impact rod and the impact head are coaxial, so that the axial impact force generated by the impact generator can accurately act on the rock sample at a horizontal angle, and the accuracy and reliability of the experimental data are ensured.

[0024] In some embodiments of the present application, the bearing, the loading frame and the rock sample are coaxial, which can ensure that the drill bit is still directed to the center of the rock sample when the rock sample is tilted.

[0025] In some embodiments of the present application, the rotating impact mechanism can be replaced by a dynamic mechanism for true triaxial solid dynamic damage test.

[0026] The rotating impact mechanism of the device is detachably connected to the base, and can be replaced by a dynamic mechanism after being detached, so that the rotating impact rock breaking test device is converted into a true triaxial solid dynamic damage test device to meet different experimental requirements, and the evaluation results of the rock breaking effect are more comprehensive and accurate, and more extensive scientific basis and data support can be provided.

[0027] In some embodiments of the present application, the dynamic mechanism includes an incident platform, an incident rod, an incident rod support, an air gun platform, an air gun and a barrel support, the incident platform and the air gun platform are detachably connected to the base, the incident platform is provided with a guide rail, the incident rod support is located on the guide rail, and the incident rod is located on the incident rod support; the barrel support is located on the air gun platform, the air gun is located on the barrel support, and the output end of the air gun abuts against the input end of the incident rod.

[0028] Through the structure, the bullet is fired by the air gun to impact the incident rod, and the incident rod impacts the rock sample to realize the true triaxial solid dynamic damage test, thereby providing a technical means for evaluating the rock breaking efficiency.

[0029] In some embodiments of the present application, in the true triaxial solid dynamic damage test, the air gun, the incident rod, the transmission rod, the confining pressure loading pump and the rock sample are coaxial, so that the impact force of the air gun can accurately act on the rock sample at a horizontal angle, and the accuracy and reliability of the experimental data are ensured.

[0030] Compared with the prior art, the embodiments of the present application have at least the following advantages or beneficial effects:

[0031] 1. The high confining pressure environment is simulated through the true triaxial system.

[0032] 2. The high temperature environment of the stratum is simulated through the heating mechanism.

[0033] 3. The drill bit is provided with different angles of inclination through the inclination control mechanism, and the complex terrain environment of the stratum is simulated.

[0034] 4. Different drill bits are replaced through the clamp to meet different experimental requirements.

[0035] 5. The integrated confining pressure shear, inclination control, rotary impact and heating functions can comprehensively study the influence of confining pressure, shear force, inclination, rotary impact and temperature on rock breaking effect, obtain more comprehensive data, and improve the accuracy and reliability of rock breaking research.

[0036] 6. Multiple loading pumps act simultaneously, which can not only ensure uniform stress on the rock sample, but also simulate the complex environment of variable confining pressure and shear force in the formation.

[0037] 7. The rotary impact mechanism can be replaced by a dynamic mechanism to realize function expansion, so that the device can not only perform rotary impact rock breaking experiment, but also carry out true triaxial solid dynamic damage test, greatly improving the use value and application range of the device and meeting the needs of different rock mechanics research. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0039] Figure 1 A structure diagram of a rotary impact rock breaking mode of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0040] Figure 2 A front view of a rotary impact rock breaking mode of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0041] Figure 3 A right view of a rotary impact rock breaking mode of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0042] Figure 4 A top view of a rotary impact rock breaking mode of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0043] Figure 5 An A-A sectional view of a rotary impact rock breaking mode of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0044] Figure 6 A partial view of a rotary impact rock breaking mode of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0045] Figure 7 A structure diagram of a heating mechanism of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0046] Figure 8 A structure diagram of a dynamic damage mode of a high-efficiency rock breaking evaluation device provided for the embodiment is shown.

[0047] Figure 9 A front view of a dynamic damage mode of a high-efficiency rock breaking evaluation device provided for an embodiment;

[0048] Figure 10 A right view of a dynamic damage mode of a high-efficiency rock breaking evaluation device provided for an embodiment;

[0049] Figure 11 A top view of a dynamic damage mode of a high-efficiency rock breaking evaluation device provided for an embodiment;

[0050] Figure 12 An A-A sectional view of a dynamic damage mode of a high-efficiency rock breaking evaluation device provided for an embodiment;

[0051] Figure 13 A partial schematic view of an A-A sectional view of a dynamic damage mode of a high-efficiency rock breaking evaluation device provided for an embodiment.

[0052] Icon: 1 - base; 2 - inclination support frame; 4 - loading frame; 5 - hydraulic rod device; 6 - confining pressure loading pump; 7 - square rod; 8 - transmission rod; 9 - shearing loading pump; 10 - shearing rod; 11 - upper baffle; 12 - ball; 13 - lower baffle; 14 - incident rod; 15 - incident rod support; 16 - incident platform; 17 - guide rail; 18 - air cannon platform; 19 - air cannon; 20 - cannon tube support; 21 - impact platform; 22 - impact rod; 23 - conversion joint; 24 - clamp; 25 - drill bit; 26 - impact rod support; 27 - impact generator; 28 - flange plate; 29 - large-diameter synchronous gear; 30 - small-diameter synchronous gear; 31 - synchronous belt; 32 - motor; 33 - motor platform; 34 - center guide rail; 35 - resistance wire. DETAILED DESCRIPTION

[0053] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0055] The features and performances of the present application are further described in detail below in combination with embodiments.

[0056] Embodiment 1

[0057] Please refer to Figures 1-7 , Figure 1 Fig. 1 shows a structure diagram of a rotating impact rock breaking mode according to an embodiment of the present application. Figure 2 Fig. 2 shows a front view of the rotating impact rock breaking mode according to the embodiment of the present application. Figure 3 Fig. 3 shows a right view of the rotating impact rock breaking mode according to the embodiment of the present application. Figure 4 Fig. 4 shows a top view of the rotating impact rock breaking mode according to the embodiment of the present application. Figure 5 Fig. 5 shows an A-A sectional view of the rotating impact rock breaking mode according to the embodiment of the present application. Figure 6 Fig. 6 shows a partial view of the rotating impact rock breaking mode according to the embodiment of the present application. Figure 7 Fig. 7 shows a structure diagram of a heating mechanism according to the embodiment of the present application.

[0058] The present embodiment provides a high-efficiency rock breaking evaluation device, which comprises a base 1, the base 1 is used for bearing a confining pressure shearing mechanism, an inclination control mechanism and a rotating impact mechanism, the base 1 is provided with an inclination support frame 2, the confining pressure shearing mechanism is rotationally connected with the inclination support frame 2, the confining pressure shearing mechanism is used for placing a rock sample and applying confining pressure and shearing force to the circumferential side and the top side of the rock sample, the inclination control mechanism is fixedly connected with the base 1, an output end of the inclination control mechanism is rotationally connected with the confining pressure shearing mechanism, so that the confining pressure shearing mechanism generates an inclination with the inclination support frame 2 as an axis, the rotating impact mechanism is detachably connected with the base 1, is used for rotating and impacting to break the rock sample and realize a rotating impact rock breaking experiment, and a heating mechanism, the heating mechanism is arranged in the confining pressure shearing mechanism and is used for heating the rock sample.

[0059] In order to simulate the problems of dynamic-static load coupling, shearing and other complex environments in the stratum, the confining pressure shearing mechanism comprises a loading frame 4, three confining pressure loading pumps 6, two square rods 7, a transmission rod 8, two shearing loading pumps 9 and two shearing force transmission mechanisms, the loading frame 4 is rotationally connected with the inclination support frame 2 through an inclination bearing, a central part of the loading frame 4 is provided with an accommodation cavity for accommodating the rock sample; the three confining pressure loading pumps 6 are respectively located at two horizontal ends and a top end of the loading frame 4, one end of the transmission rod 8 is connected with the confining pressure loading pump 6 located at the top end, and the other end is in communication with the accommodation cavity; one end of one square rod 7 is connected with the confining pressure loading pump 6 located at one horizontal end, and the other end is in communication with the accommodation cavity; one end of the other square rod 7 is connected with the other confining pressure loading pump 6 located at the other horizontal end, and the other end of the square rod 7 is also in communication with the accommodation cavity; the two shearing loading pumps 9 are respectively located at two vertical ends of the loading frame 4, and each of the two shearing loading pumps 9 is connected with a shearing force transmission mechanism, and the two shearing force transmission mechanisms are both in communication with the accommodation cavity.

[0060] In order to simulate the real situation that the rock is not uniformly stressed in the circumferential direction in the formation environment, the three confining pressure loading pumps 6 can provide different confining pressures at the same time, and the two shear loading pumps 9 can provide different shear forces at the same time, so that the simulation device is closer to the real formation environment, and the experimental data is more true and accurate.

[0061] In order to ensure that the rock sample receives uniform shear force, the shear force transmission mechanism includes a shear rod 10, an upper baffle 11, a lower baffle 13 and a plurality of balls 12, one end of the shear rod 10 is connected with the shear loading pump 9, the other end is connected with the upper baffle 11; one side of the lower baffle 13 is connected with the side of the upper baffle 11 away from the shear rod 10, the other side of the lower baffle 13 is in communication with the containing cavity, and a plurality of balls 12 are arranged between the lower baffle 13 and the upper baffle 11, the balls 12 can offset the lateral friction force, reduce the force loss of the shear force in transmission, and exclude factors affecting the experimental data, so that the experimental results are more accurate.

[0062] In order to meet the needs of the rock sample to complete the rotary impact test at different angles, the inclination control mechanism includes a hydraulic rod device 5 and a roller, the fixed end of the hydraulic rod device 5 is connected with the base 1, the output end of the hydraulic rod device 5 is rotatably connected with the top end of the loading frame 4 through the roller, and the uneven environment of the simulation formation is simulated, so that the experimental data is more true and reliable.

[0063] In order to provide different frequency and intensity of axial impact force, the rotary impact mechanism includes an impact platform 21, an impact rod 22, an impact head, an impact rod support 26 and an impact generator 27, the impact platform 21 is detachably connected with the base 1, the impact platform 21 is provided with a center guide rail 34, the impact rod support 26 is connected with the impact platform 21, and the impact rod support 26 is located above the center guide rail 34, the impact generator 27 is connected with the base 1, the impact rod 22 is located on the impact rod support 26, and the input end of the impact rod 22 is connected with the impact generator 27 through a flange plate 28, the output end of the impact rod 22 is connected with the impact head, the impact head is in communication with the containing cavity, and the needs of different experiments are met.

[0064] In order to realize the axial impact of the rock sample, the impact head includes a conversion joint 23, a clamp 24 and a drill bit 25, one end of the conversion joint 23 is connected with the impact rod 22, the other end is connected with the clamp 24, the clamp 24 is detachably connected with the drill bit 25, the clamp 24 can clamp the drill bit 25, and the needs of different experiments are met.

[0065] In order to form a torsional impact on the rock sample, the above-mentioned rotating impact mechanism further comprises a motor 32, a motor platform 33, a synchronous belt 31, a large-diameter synchronous gear 29 and a small-diameter synchronous gear 30, the motor platform 33 is connected with the base 1, the motor 32 is located on the motor platform 33, the small-diameter synchronous gear 30 is connected with the output end of the motor 32, the large-diameter synchronous gear 29 is sleeved on the impact rod 22, and the large-diameter synchronous gear 29 is connected with the small-diameter synchronous gear 30 through the synchronous belt 31, so that the impact rod 22 achieves a rotating effect, the torque generated by the motor 32 acts on the rock sample, and a rotating impact rock breaking test is realized.

[0066] In order to simulate the high-temperature working environment of the formation, the above-mentioned heating mechanism is composed of a plurality of resistance wires 35, and the plurality of resistance wires 35 are located on the two square rods 7, the transmission rod 8 and the two lower baffles 13 respectively. By arranging the plurality of resistance wires 35, uniform heating of the rock sample can be realized, the rock sample is uniformly heated, the required test temperature is quickly reached, the high-temperature working environment of the formation is simulated, the rock breaking experiment under high temperature is realized, and more real and accurate experimental data are provided.

[0067] In the rotating impact rock breaking test, the impact generator 27, the flange plate 28, the large-diameter synchronous gear 29, the impact rod 22 and the impact head are coaxial, so that the axial impact force generated by the impact generator 27 accurately acts on the rock sample at a horizontal angle, and the accuracy and reliability of the experimental data are ensured.

[0068] In the rotating impact rock breaking test, the above-mentioned bearing, the loading frame 4 and the rock sample are coaxial, so that when the rock sample is inclined, the drill teeth 25 still face the central part of the rock sample.

[0069] In use, the rotating impact rock breaking test comprises the following steps:

[0070] S1. The rock sample is placed in the containing cavity of the loading frame 4;

[0071] S2. The hydraulic rod device 5 is used to adjust the rock sample to a predetermined inclination angle;

[0072] S3. The resistance wire 35 is used to heat the rock sample to a specified temperature;

[0073] S4. After the rock sample reaches the preset temperature, the confining pressure loading pump 6 is used to apply confining pressure to the rock sample, and the shear loading pump 9 is used to apply shear force to the rock sample;

[0074] S5. The impact generator 27 and the motor 32 are started, and the impact rod 22 and the drill teeth 25 are rotated to impact and break the rock sample;

[0075] S6. The computer records the experimental data, and the experiment is completed, the pressure is released and the rock sample is taken out.

[0076] Example 2

[0077] Please refer to Figures 7-13 , Figure 7 Fig. 1 shows a structural diagram of a heating mechanism according to an embodiment of the present application; Figure 8 Fig. 2 shows a structural diagram of a dynamic damage mode according to an embodiment of the present application; Figure 9 Fig. 3 shows a front view of the dynamic damage mode according to an embodiment of the present application; Figure 10 Fig. 4 shows a right view of the dynamic damage mode according to an embodiment of the present application;

[0078] Figure 11 Fig. 5 shows a top view of the dynamic damage mode according to an embodiment of the present application; Figure 12 Fig. 6 shows an A-A sectional view of the dynamic damage mode according to an embodiment of the present application; Figure 13 Fig. 7 shows a partial diagram of the A-A sectional view of the dynamic damage mode according to an embodiment of the present application.

[0079] Based on the embodiment 1, the embodiment 2 provides a true triaxial solid dynamic damage test device mode of a high-efficiency rock breaking evaluation device, and the rotating impact mechanism in the embodiment 1 can be replaced by a dynamic mechanism, and the dynamic mechanism is used for the true triaxial solid dynamic damage test.

[0080] The rotating impact mechanism of the device is detachably connected with the base 1, and can be detached and replaced by the dynamic mechanism, so that the rotating impact rock breaking test device is converted into the true triaxial solid dynamic damage test, different experimental requirements are met, the evaluation results of the rock breaking effect are more comprehensive and accurate, and more extensive scientific basis and data support can be provided.

[0081] In order to realize the true triaxial solid dynamic damage test, the above-mentioned dynamic mechanism includes an incident platform 16, an incident rod 14, an incident rod support 15, an air gun platform 18, an air gun 19 and a barrel support 20, the incident platform 16 and the air gun platform 18 are detachably connected with the base 1, the incident platform 16 is provided with a guide rail 17, the incident rod support 15 is located on the guide rail 17, and the incident rod 14 is located on the incident rod support 15; the barrel support 20 is located on the air gun platform 18, the air gun 19 is located on the barrel support 20, and the output end of the air gun 19 abuts against the input end of the incident rod 14.

[0082] In the true triaxial solid dynamic damage test, the air gun 19, the incident rod 14, the transmission rod 8, the confining pressure loading pump 6 and the rock sample are coaxial, the impact force of the air gun 19 is accurately applied to the rock sample at a horizontal angle, and the accuracy and reliability of the experimental data are ensured.

[0083] In use, in the true triaxial solid dynamic damage test, the following steps are included:

[0084] S1. The rock sample is placed into the containing cavity of the loading frame 4;

[0085] S2. Heating the rock sample to a specified temperature using the resistance wire 35;

[0086] S3. After the rock sample reaches the preset temperature, the confining pressure loading pump 6 is used to apply confining pressure to the rock sample, and the shear loading pump 9 is used to apply shear force to the rock sample;

[0087] S4. The air gun 19 is used to launch a bullet to impact the incident rod 14;

[0088] S5. The computer records the experimental data, and after the experiment is completed, the pressure is released and the rock sample is taken out

[0089] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency rock-breaking evaluation device, characterized in that, include: A base, which is used to support the confining pressure shearing mechanism, the tilt angle control mechanism, and the rotary impact mechanism; The base is provided with an inclined support frame, and the confining pressure shearing mechanism is rotatably connected to the inclined support frame. The confining pressure shearing mechanism is used to place the rock sample and apply confining pressure and shearing force to the circumferential and top sides of the rock sample. The tilt angle control mechanism is fixedly connected to the base, and the output end of the tilt angle control mechanism is rotatably connected to the confining pressure shearing mechanism so that the confining pressure shearing mechanism generates a tilt angle with the tilt angle support frame as the axis. The rotating impact mechanism is detachably connected to the base and is used to achieve a rotating impact rock breaking experiment by rotating impact to break the rock sample. A heating mechanism, which is disposed within the confining pressure shearing mechanism, is used to heat the rock sample; The confining pressure shearing mechanism includes a loading frame, three confining pressure loading pumps, two square rods, a transmission rod, two shear loading pumps, and two shear force transmission mechanisms. The loading frame is rotatably connected to the tilting support frame via tilting bearings. A receiving cavity for accommodating the rock sample is provided at the center of the loading frame. The three confining pressure loading pumps are located at the two horizontal ends and the top end of the loading frame, respectively. One end of the transmission rod is connected to the confining pressure loading pump located at the top end, and the other end communicates with the receiving cavity. One end of one square rod is connected to one of the confining pressure loading pumps located at the horizontal end, and the other end communicates with the receiving cavity. One end of another square rod is connected to another confining pressure loading pump located at the horizontal end, and the other end of this square rod also communicates with the receiving cavity. The two shear loading pumps are located at the two vertical ends of the loading frame, and each of the two shear loading pumps is connected to a shear force transmission mechanism. Both shear force transmission mechanisms communicate with the receiving cavity. The shear force transmission mechanism includes a shear rod, an upper baffle, a lower baffle, and a plurality of balls. One end of the shear rod is connected to the shear loading pump, and the other end is connected to the upper baffle. One side of the lower baffle is connected to the side of the upper baffle away from the shear rod, and the other side of the lower baffle is connected to the receiving cavity. A plurality of balls are arranged between the lower baffle and the upper baffle. The heating mechanism consists of multiple resistance wires, which are respectively located on the two square rods, the transmission rod, and the two lower baffles.

2. The high-efficiency rock-breaking evaluation device according to claim 1, characterized in that, The tilt control mechanism includes a hydraulic rod device and a roller. The fixed end of the hydraulic rod device is connected to the base, and the output end of the hydraulic rod device is rotatably connected to the top of the loading frame through the roller.

3. The high-efficiency rock-breaking evaluation device according to claim 1, characterized in that, The rotating impact mechanism includes an impact platform, an impact rod, an impact head, an impact rod support, and an impact generator. The impact platform is detachably connected to the base. A central guide rail is provided on the impact platform. The impact rod support is connected to the impact platform and is located above the central guide rail. The impact generator is connected to the base. The impact rod is located on the impact rod support, and the input end of the impact rod is connected to the impact generator via a flange. The output end of the impact rod is connected to the impact head, and the impact head communicates with the receiving cavity.

4. The high-efficiency rock-breaking evaluation device according to claim 3, characterized in that, The impact head includes a conversion connector, a clamp, and drill teeth. One end of the conversion connector is connected to the impact rod, and the other end is connected to the clamp. The clamp and the drill teeth are detachably connected.

5. The high-efficiency rock-breaking evaluation device according to claim 3, characterized in that, The rotary impact mechanism further includes a motor, a motor platform, a synchronous belt, a large-diameter synchronous gear, and a small-diameter synchronous gear. The motor platform is connected to the base, the motor is located on the motor platform, the small-diameter synchronous gear is connected to the output end of the motor, the large-diameter synchronous gear is sleeved on the impact rod, and the large-diameter synchronous gear is connected to the small-diameter synchronous gear through the synchronous belt.

6. The high-efficiency rock-breaking evaluation device according to claim 1, characterized in that, The rotating impact mechanism is replaced by a dynamic mechanism, which is used for true triaxial solid dynamic damage testing.

7. The high-efficiency rock-breaking evaluation device according to claim 6, characterized in that, The dynamic mechanism includes an incident platform, an incident rod, an incident rod support, an air cannon platform, an air cannon, and a cannon barrel support. The incident platform and the air cannon platform are detachably connected to the base. The incident platform is provided with a guide rail, the incident rod support is located on the guide rail, and the incident rod is located on the incident rod support. The cannon barrel support is located on the air cannon platform, the air cannon is located on the cannon barrel support, and the output end of the air cannon abuts against the input end of the incident rod.

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