A fractured rock mass seepage test instrument

Abstract

The present invention discloses a fractured rock mass seepage test instrument, comprising a base, a support plate fixedly connected to the upper side of the base, a support plate rotatably connected to the upper side of the support plate, a cutting machine arranged on one side of the support plate, a flip motor fixedly connected to the rear side of the support plate, a split seepage device fixedly connected to the main shaft of the flip motor, and a pad pipe, a partition plate arranged in the middle of the pad pipe, and the partition plate separates the pad pipe into two seepage chambers. The present invention uses the pad pipe to perform seepage tests on two sections of the rock column after segmentation, and is not limited to one test. After the two sections of the sample are tested, the test piece can be further shortened to continue the test, and the rock column can be tested as a whole and in sections, so that it is easy to find the relationship between the distribution of cracks in the sample and the seepage performance.

Description

Technical Field

[0001] The invention relates to the technical field of rock mass seepage, in particular to a fractured rock mass seepage experimental instrument. Background Art

[0002] The study of rock seepage characteristics is a key research content in the field of energy reservoir development such as oil and gas extraction, in-situ leaching, and deep mining. The rock seepage experiment under multi-field coupling refers to the seepage experiment conducted on the rock under the joint action of multiple fields such as pressure field, hydraulic field, temperature field, and chemical field to obtain the changes in rock permeability, porosity, particle grading, strength and other characteristics, so as to guide engineering practice and improve production efficiency.

[0003] Existing leakage test devices generally use rock columns sampled during exploration for testing. Since the removed rock columns may have good outer integrity and no exposed cracks, there is a large difference between the performance of the seepage test and the actual results. If the rock columns are infiltrated in sections, the repeated installation of the rock columns will result in low test efficiency and easy deviations due to inconsistent test conditions before and after. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a fractured rock mass seepage test instrument, thereby solving the problems of the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fractured rock mass seepage experimental instrument comprises a base, a support plate is fixedly connected to the upper side of the base, the upper side of the support plate is rotatably connected to the support plate, a cutting machine is arranged on one side of the support plate, a flip motor is fixedly connected to the rear side of the support plate, a split seepage device is fixedly connected to the main shaft of the flip motor, the split seepage device comprises a support plate, the support plate is fixedly connected to the main shaft of the flip motor, a horizontal slide groove is arranged on the upper side of the support plate, two horizontal sliders are slidably connected in the horizontal slide groove, a cylinder is fixedly connected to the upper side of each horizontal slider, both ends of the cylinder are open structures, baffles are respectively arranged on the outer ends of the two cylinders, each baffle is fixedly slidably connected to a branch pipe, one end of each branch pipe close to the cylinder is fixedly connected to an end cover, a rock column is arranged between the two end covers, the baffle is fixedly connected to an electric push rod, and the telescopic end of the electric push rod is fixedly connected to the end cover;

[0007] It also includes a cushion pipe, a partition is arranged in the middle of the cushion pipe, and the partition divides the cushion pipe into two seepage chambers.

[0008] Preferably, the inner wall of the cylinder is fixedly connected to an annular inflatable cushion, the outside of the cylinder is fixedly connected to a pressurizing pipe, and the pressurizing pipe is connected to a pressurizing device through a pipeline.

[0009] Preferably, the support plate is provided with a vertical slide groove, a vertical slider is slidably connected in the vertical slide groove, the vertical slider is driven to rise and fall by a lifting mechanism, a cutting machine is provided on one side of the vertical slider, and a cushion pipe is provided on the other side of the vertical slider.

[0010] Preferably, the middle part of the partition is rotatably connected to a circular shaft, a motor is built into the partition to drive the circular shaft to rotate, one side of the circular shaft is fixedly connected to a scraper, and a sponge strip is arranged on one side of the scraper.

[0011] Preferably, the sponge strip has a structure that is wide outside and narrow inside.

[0012] Preferably, both sides of the partition are respectively fixedly connected to limit plates, the limit plates are arranged corresponding to the scraper plates, and an elastic membrane is arranged between the outer side of the scraper plates and the outer side of the limit plates.

[0013] Preferably, the upper side of the cushion tube is fixedly connected to the first tube at a position corresponding to the limiting plate, and the bottom of the cushion tube is fixedly connected to the second tube.

[0014] The advantages of the present invention are as follows: the fractured rock seepage test instrument provided by the present invention can perform seepage tests on two sections of samples after the rock column is segmented through a cushion pipe, and is not limited to one test. After the two sections of the sample are tested, the test piece can be further shortened to continue the test, and the rock column can be tested as a whole and in sections, so that it is easy to find the relationship between the distribution of fractures in the sample and the seepage performance.

[0015] The present invention brushes the cut section of the rock column, and the sponge strip after brushing is attached to one side of the limit plate and corresponds to the first tube. The first tube replaces the air blowing tube, and the elastic membrane rotates and expands in a fan shape to form a circular surface, forming protection on the end face of the cleaned rock column. When high-pressure gas is blown in subsequently, on the one hand, dust is discharged from the dust extraction pipe along the guide, and on the other hand, the pressurized airflow is prevented from blowing dust into the cracks of the rock column to affect the permeability, thereby improving the efficiency of the segmented permeability test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a basic structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of a split seepage device and a cross-section of a cylinder;

[0018] Figure 3 It is a schematic diagram of the pressure seepage of the whole rock column of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the cushion pipe of the present invention;

[0020] Figure 5 It is a partial cross-sectional view of the elastic membrane in the cushion tube of the present invention after unfolding. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] like Figures 1 to 5 As shown, a fractured rock seepage test instrument provided by the present invention comprises a base 1, a support plate 11 is fixedly connected to the upper side of the base 1, a support plate 12 is rotatably connected to the upper side of the support plate 11, a cutting machine 13 is arranged on one side of the support plate 12, a flip motor 14 is fixedly connected to the rear side of the support plate 11, a split seepage device 2 is fixedly connected to the main shaft of the flip motor 14, and the flip motor 14 can change the inclination angle of the split seepage device 2, so that the test requirements are more abundant, and the split seepage device 2 comprises a supporting plate 21, the supporting plate 21 is fixedly connected to the main shaft of the flip motor 14, a horizontal slide groove 22 is arranged on the upper side of the supporting plate 21, two horizontal sliders 23 are slidably connected in the horizontal slide groove 22, and the horizontal slider 23 is connected through a common structure Adjust to different positions in the horizontal slide 22, such as electric push rods and cylinders. A cylinder 24 is fixedly connected to the upper side of each horizontal slider 23. The two ends of the cylinder 24 are open structures. Baffles 25 are respectively arranged at the outer ends of the two cylinders 24. Each baffle 25 is fixedly slidably connected to a branch pipe 26. One end of each branch pipe 26 close to the cylinder 24 is fixedly connected to an end cover 27. A rock column 10 is arranged between the two end covers 27. The baffle 25 is fixedly connected to an electric push rod 28. The telescopic end of the electric push rod 28 is fixedly connected to the end cover 27. The electric push rod 28 is extended to push the rock column 10 and seal the end face. A thread is arranged at the outer end of the branch pipe 26 for connecting a drain pipe, an inlet pipe or a flow meter. The branch pipe 26 is assembled according to specific test requirements.

[0023] It also includes a gasket tube 3, a partition plate 31 is arranged in the middle of the gasket tube 3, and the partition plate 31 divides the gasket tube 3 into two seepage chambers.

[0024] The inner wall of the cylinder 24 is fixedly connected to the annular inflatable cushion 4, and the outer side of the cylinder 24 is fixedly connected to the pressurizing pipe 41. The pressurizing pipe 41 is connected to the pressurizing device through a pipeline. The pressurizing device pumps pressurized air or hydraulic oil to pressurize the outer side of the rock column 10 to simulate the lateral pressure it is subjected to deep underground, making the seepage test more practical.

[0025] A vertical slide groove 121 is provided on the support plate 12, and a vertical slider 122 is slidably connected in the vertical slide groove 121. The vertical slider 122 is driven to rise and fall by a lifting mechanism, and the lifting mechanism is a kind of cylinder, hydraulic rod or screw slider mechanism. A cutter 13 is provided on one side of the vertical slider 122, and the cutter 13 adjusts the cutting position of the saw blade through a conventional structure. A cushion pipe 3 is provided on the other side of the vertical slider 122. After the rock column 10 is cut off, the cushion pipe 3 is placed in the middle, that is, after the overall leakage test of the rock column 10, different lengths of segments can be set according to needs for subsequent tests, so as to comprehensively evaluate the seepage performance of the uneven fractured rock mass.

[0026] In the initial experiment, the two horizontal sliders 23 are close to each other, the two cylinders 24 are combined to form a whole, and a sealing ring is set on the contact surface to increase the sealing performance. The branch pipe 26 at one end is connected to the liquid inlet component (liquid inlet pipe, flow meter, pressure gauge), and the branch pipe 26 at the other end is connected to the liquid discharge component (liquid discharge pipe and flow meter). Pressure liquid is input through one end to test the first permeability performance of the rock column 10.

[0027] After the initial seepage, the drainage component is replaced with the liquid inlet component, and the two cylinders 24 are separated, the rock column 10 is cut off at the required position, and after cleaning the end face, a cushion pipe 3 is placed between the two cylinders 24, and the drainage component is installed in the seepage cavity of the cushion pipe 3. The cushion pipe 3 performs seepage tests on the two sections of the rock column 10 after segmentation, and the test is not limited to one time. After the two sections of the sample are tested, the test piece can be further shortened to continue the test. The rock column 10 is tested as a whole and in sections, which makes it easy to find the relationship between the distribution of cracks in the sample and the seepage performance. However, the existing test equipment does not have such convenient test conditions.

[0028] As an embodiment of the present invention, the middle part of the partition 31 is rotatably connected to the circular shaft 32, the partition 31 has a built-in motor to drive the rotating circular shaft 32, one side of the circular shaft 32 is fixedly connected to the scraper 33, and a sponge strip 34 is arranged on one side of the scraper 33. The sponge strip 34 is wide outside and narrow inside, and is pressed on the cross section of the rock column 10 to easily gather dust to the inner wall near the partition 31. The two sides of the partition 31 are respectively fixedly connected to the limit plates 35, and the limit plates 35 are arranged corresponding to the scraper 33. A spring is arranged between the outer side of the scraper 33 and the outer side of the limit plate 35. The elastic membrane 36 rotates and expands into a circular surface in a fan shape, forming a protection on the end face of the cleaned rock column 10 to prevent the pressurized airflow from blowing dust into the cracks of the rock column 10 and affecting the permeability. The position of the limit plate 35 corresponding to the upper side of the cushion tube 3 is fixedly connected to the first tube 37, and the bottom of the cushion tube 3 is fixedly connected to the second tube 38. The first tube 37 and the second tube 38 are both threadedly connected, which can be easily disassembled. After the first tube 37 is disassembled, an air blowing pipe or a plug is installed. After the second tube 38 is disassembled, a dust extraction pipe or a drainage component is installed.

[0029] The present invention brushes the cut section of the rock column 10, and the sponge strip 34 after brushing is attached to one side of the limit plate 35 and corresponds to the first tube 37. The first tube 37 replaces the air blowing tube, and the elastic membrane 36 rotates and expands in a fan shape to form a circular surface, forming protection on the end face of the cleaned rock column 10. When high-pressure gas is blown in subsequently, on the one hand, dust is discharged from the dust extraction pipe along the guide, and on the other hand, the pressurized airflow is prevented from blowing dust into the cracks of the rock column 10 to affect the permeability, thereby improving the efficiency of the segmented permeability test.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fractured rock mass seepage test instrument, comprising a base (1), the upper side of the base (1) being fixedly connected to a support plate (11), the upper side of the support plate (11) being rotatably connected to a support plate (12), a cutting machine (13) being arranged on one side of the support plate (12), a rear side of the support plate (11) being fixedly connected to a flip motor (14), a main shaft of the flip motor (14) being fixedly connected to a split seepage device (2), characterized in that: The split seepage device (2) comprises a support plate (21), the support plate (21) is fixedly connected to the main shaft of the flip motor (14), a horizontal slide groove (22) is provided on the upper side of the support plate (21), two horizontal sliders (23) are slidably connected in the horizontal slide groove (22), each horizontal slider (23) is fixedly connected to a cylinder (24) on the upper side, the cylinder (24) has an open structure at both ends, baffles (25) are respectively provided at the outer ends of the two cylinders (24), each baffle (25) is fixedly slidably connected to a branch pipe (26), one end of each branch pipe (26) close to the cylinder (24) is fixedly connected to an end cover (27), a rock column (10) is provided between the two end covers (27), the baffle (25) is fixedly connected to an electric push rod (28), and the telescopic end of the electric push rod (28) is fixedly connected to the end cover (27); It also comprises a gasket tube (3), a partition plate (31) is arranged in the middle of the gasket tube (3), and the partition plate (31) divides the gasket tube (3) into two seepage chambers; The inner wall of the cylinder (24) is fixedly connected to an annular inflatable cushion (4), the outer surface of the cylinder (24) is fixedly connected to a pressurizing pipe (41), and the pressurizing pipe (41) is connected to a pressurizing device through a pipeline; The support plate (12) is provided with a vertical slide groove (121), a vertical slider (122) is slidably connected in the vertical slide groove (121), the vertical slider (122) is driven to rise and fall by a lifting mechanism, a cutting machine (13) is provided on one side of the vertical slider (122), and a cushion pipe (3) is provided on the other side of the vertical slider (122); The middle part of the partition (31) is rotatably connected to a circular shaft (32); a motor is built into the partition (31) to drive the circular shaft (32) to rotate; one side of the circular shaft (32) is fixedly connected to a scraper (33); and a sponge strip (34) is provided on one side of the scraper (33); The two sides of the partition plate (31) are respectively fixedly connected to the limiting plates (35), the limiting plates (35) are arranged corresponding to the scraper plates (33), and an elastic membrane (36) is arranged between the outer side of the scraper plates (33) and the outer side of the limiting plates (35); The upper side of the cushion tube (3) is fixedly connected to the first tube (37) at a position corresponding to the limit plate (35), and the bottom of the cushion tube (3) is fixedly connected to the second tube (38).

2. The fractured rock mass seepage test instrument according to claim 1, characterized in that: The sponge strip (34) has a structure that is wide outside and narrow inside.

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