Device for making standard rock samples of various specifications and method of using the same

Abstract

The present invention provides a device for making standard rock samples of various specifications, the device comprising a base and a standard mold; a placement groove is provided on the base, the standard mold is arranged in the placement groove of the base, and the standard mold is a hollow cylindrical shape; the standard mold comprises a plurality of mold units, the bottom surface of the mold unit at the bottom and the top surface of the mold unit at the top are both horizontal planes, and there are the same inclined surfaces between two adjacent mold units, and the angle of the inclined surface is set to the required joint inclination angle. The device can realize the production of rock samples with various joint angles. After the rock sample is pressed into shape and taken out from the standard mold, the crack production line is pulled out of the rock sample to form a crack in the rock sample, and cracks of different lengths and different inclination angles can be produced.

Description

Technical Field

[0001] The invention belongs to the technical field of rock sample preparation, and in particular relates to a device for preparing standard rock samples of various specifications and a use method thereof. Background Art

[0002] For projects under complex geological backgrounds, multiple layers of sedimentary rock geology are very common, and at the same time, the rock strata contain a large number of joints and fissures. As an important research method for complex geological engineering, the difficulty of physical model experiments lies in the selection and proportion of similar materials under the combination of multiple thin rock layers. The physical and mechanical properties of similar materials and on-site rocks must meet the requirements of similarity theory. Indoor geotechnical experiments such as single triaxial compression tests and Brazilian splitting tests are important research methods for determining the physical and mechanical parameters of similar materials and rocks. Therefore, it is necessary to make standard rock samples in the laboratory in order to obtain the corresponding physical and mechanical parameters. However, the original production molds are often made of two semicircular molds. The rock samples made by this mold are difficult to form, and demolding is prone to splitting and surface unevenness. In addition, the existing production molds cannot produce rock samples containing cracks or joint angles.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a device for making standard rock samples of various specifications and a method of using the same, so as to at least solve the current problems of rock sample demoulding being prone to defects, being difficult to shape, and being unable to make rock samples containing cracks or joint angles.

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

[0006] A device for making standard rock samples of various specifications, characterized in that the device comprises a base and a standard mold;

[0007] The base is provided with a placement groove, the standard mold is arranged in the placement groove of the base, and the standard mold is a hollow cylindrical shape;

[0008] The standard mold includes a plurality of mold units, the bottom surface of the mold unit at the bottom and the top surface of the mold unit at the top are both horizontal planes, and there are the same inclined planes between two adjacent mold units, and the angle of the inclined plane is set to the required joint inclination angle.

[0009] The device for making standard rock samples of various specifications as described above is preferably provided with a crack making line in any mold unit.

[0010] In the device for making standard rock samples of various specifications as described above, preferably, the fracture making line runs through the internal cavity of the standard mold.

[0011] The device for making standard rock samples of various specifications as described above, preferably, the device also includes a hydraulic press and a tamper, and the interior of the standard mold is a hollow cylinder;

[0012] The outer diameter of the tamper is the same as the inner diameter of the standard mold, and the tamper extends into the interior of the standard mold; the hydraulic press presses the tamper downward, and the tamper presses the material inside the standard mold to form a rock sample.

[0013] In the device for making standard rock samples of various specifications as described above, preferably, the mold unit located at the bottom of the standard mold is a solid structure, and the lower end surface of the tamping device has the same inclination angle as the inclined surface.

[0014] As described above, in the device for making standard rock samples of various specifications, preferably, a force-bearing platform is provided on the top of the tamping device, and the diameter of the force-bearing platform is larger than the diameter of the tamping device.

[0015] The device for making standard rock samples of various specifications as described above, preferably, further comprises a demoulder, and the demoulder is in the shape of a hollow cylinder.

[0016] As described above, in the device for making standard rock samples of various specifications, preferably, a groove is provided at the uppermost portion of the demoulding device, and the standard mold is located in the groove above the demoulding device.

[0017] As described above, in the device for making standard rock samples of various specifications, preferably, the inner diameter of the demoulder is larger than the inner diameter of the standard mold, and the height of the demoulder is higher than the standard mold; so that the pressed rock sample can be pressed into the demoulder.

[0018] The present invention also provides a method for using a device for making standard rock samples of various specifications. The method for using the device for making standard rock samples of various specifications comprises the following steps:

[0019] Step 1: According to the height of the rock sample to be made, multiple mold units are selected to form a standard mold, and the standard mold is placed on a base; according to the cracks to be made, a crack making line is drawn in the standard mold;

[0020] The mold units in the standard mold are spliced ​​upward in sequence. After each mold unit is placed, the rock sample material is filled into the mold unit. After the rock sample material fills the mold unit, it is compacted by a tamper. The above steps are repeated to complete the splicing of the standard mold and the filling of the material.

[0021] Step 2: Place the tamper on top of the standard mold, and then place the standard mold and the tamper in a hydraulic press; start the hydraulic press to press the tamper until the force-bearing platform of the tamper fits with the top of the standard mold, thus completing the pressing of the rock sample;

[0022] Step 3, using different proportions of materials, selecting mold units of different specifications to form a standard mold, and repeating the above steps until the height of the standard rock sample is reached;

[0023] Step 4, placing the already pressed standard mold into the demoulder, and placing the base under the demoulder; placing the tamping device on the standard mold, and placing the assembled base, demoulder, standard mold and tamping device in the hydraulic press;

[0024] Step 5, start the hydraulic press and apply downward pressure evenly until the rock sample is released from the standard mold and falls into the demolding device;

[0025] Step 6, taking the rock sample out of the demoulder, and pulling the crack making wire out of the rock sample to form a crack in the rock sample, thereby completing the making of the rock sample.

[0026] Beneficial effects: The device for making standard rock samples of various specifications:

[0027] (1) The same set of equipment can produce rock samples with heights of 25 mm, 50 mm and 100 mm with fractured inclined bedding combinations, reducing the cost of rock sample production.

[0028] (2) By weighing the same mass of materials and pressing them with a hydraulic press, the production error of each group of rock samples can be greatly reduced.

[0029] (3) One-time filling and one-time press forming greatly reduces the chance of surface unevenness.

[0030] (4) The material compactor is demoulded by pressing at a constant speed with a hydraulic press, which greatly reduces the probability of rock sample splitting.

[0031] (5) The standard mold and demoulding device are all integrated and can be spliced ​​to reduce the time of installing the mold. The hydraulic press can be used to increase the pressure, thereby improving the efficiency of rock sample production.

[0032] (6) By setting a splicable mold with a certain angle and setting a crack production line, a variety of rock sample combinations with cracks and joint angles can be produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0034] Figure 1 A schematic diagram of a standard mold and a crack production line combination in an embodiment of the invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the suppression of the middle rock sample;

[0036] Figure 3 A schematic diagram of another standard mold and crack production line combination in an embodiment of the invention;

[0037] Figure 4 for Figure 3 Schematic diagram of the suppression of the middle rock sample;

[0038] Figure 5 A schematic diagram of a combination of a standard mold and a demoulder in an embodiment of the invention;

[0039] Figure 6 It is a schematic diagram of demoulding a rock sample in an embodiment of the invention.

[0040] In the figure: 1. Base; 2. Standard mold; 3. Crack making line; 4. Tamper; 5. Hydraulic press; 6. Demolder. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0042] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0044] According to a specific embodiment of the present invention, Figure 1-6As shown, the present invention provides a device for making standard rock samples of various specifications, the device comprising a base 1 and a standard mold 2; a placement groove is provided on the base 1, the standard mold 2 is arranged in the placement groove of the base 1, and the standard mold 2 is a hollow cylindrical shape; the standard mold 2 comprises a plurality of mold units, the bottom surface of the mold unit at the bottom and the top surface of the mold unit at the top are both horizontal planes, and the same inclined surface is provided between two adjacent mold units, and the angle of the inclined surface is set to the required joint inclination angle.

[0045] The angle of the inclined surface of the mold unit is set according to the joint inclination angle that needs to be set, thereby providing a basis for making rock samples with joint inclination angles, and being able to realize the production of rock samples with various joint angles.

[0046] A crack making line 3 is drawn in any mold unit. In this embodiment, the crack making line 3 can be drawn in a single mold unit, or in multiple mold units, so that cracks of different lengths and different inclination angles can be made. After the rock sample is pressed and taken out of the standard mold 2, the crack making line 3 is pulled out of the rock sample to form a crack in the rock sample. The crack making line 3 runs through the internal cavity of the standard mold 2, and the crack making line 3 intersects or does not intersect with the center line of the mold unit.

[0047] In this embodiment, the crack making line 3 passes through the inner cavity of the standard mold 2, and the crack making line 3 can be selected to intersect or not intersect with the center line of the standard mold 2; when the crack making line 3 intersects with the center line of the standard mold 2, the crack making line 3 passes through the center of the standard mold 2, and the crack making line 3 crosses the entire standard mold 2; when the crack making line 3 does not intersect with the center line of the standard mold 2, the crack making line 3 only passes through a part of the standard mold 2; a variety of different cracks that pass through the standard mold 2 can be made according to needs. The crack making line can be made of nylon line.

[0048] The device also includes a hydraulic press 5 and a rammer 4. The interior of the standard mold 2 is a hollow cylinder. The outer diameter of the rammer 4 is the same as the inner diameter of the standard mold 2, and the rammer 4 extends into the interior of the standard mold 2. The hydraulic press 5 presses down the rammer 4, and the rammer 4 presses the material inside the standard mold 2 to form a rock sample.

[0049] The compactor 4 and the standard mold 2 are both placed under the pressure head of the hydraulic press 5. The pressure head of the hydraulic press 5 applies pressure to the compactor 4, and the compactor 4 compacts the material in the standard mold 2 to form a rock sample. During the pressing process, each time a mold unit is installed, it is compacted once, thereby forming a natural joint.

[0050] The mold unit located at the bottom of the standard mold 2 is a solid structure, and the lower end surface of the tamper 4 has the same inclination angle as the inclined surface. Due to the setting of the inclined surfaces in the lower and upper mold units, the compression amount of the material at each position in these mold units is not the same, which makes the inclination angle of the joints of the rock sample and the angle of the inclined surface of the mold unit have a certain error value. In this embodiment, the lowermost mold unit is solid, and the lower end of the tamper 4 is set to the same inclination angle as the inclined surface. Such a setting can press out a jointed rock sample with the same inclination angle as the inclined surface. In other embodiments, the upper end inclined surface and the lower end inclined surface in a mold unit can be set to different angles, so that jointed rock samples with different inclination angles can be produced. In other embodiments, the lowermost mold unit is a hollow structure, and the lower end surface of the tamper 4 is a horizontal plane.

[0051] A force-bearing platform is provided on the top of the tamper 4, and the diameter of the force-bearing platform is larger than the diameter of the tamper 4. The diameter of the force-bearing platform is larger than the diameter of the tamper 4, so that the top of the tamper 4 has a larger force-bearing area, and then when the hydraulic press 5 applies force, the tamper 4 is more evenly stressed; and the force-bearing platform can serve as a stop edge at the top of the tamper 4 to prevent the tamper 4 from falling completely into the standard mold 2.

[0052] The device also includes a demolding device 6, which is a hollow cylindrical shape; a groove is provided at the top of the demolding device 6, and the standard mold 2 is located in the groove above the demolding device 6; the inner diameter of the demolding device 6 is larger than the inner diameter of the standard mold 2, and the height of the demolding device 6 is higher than the standard mold 2; so that the pressed rock sample can be pressed into the demolding device 6.

[0053] In this embodiment, the device is composed of a base 1, a standard mold 2, a crack making line 3, a demolding device 6, a tamping device 4 and a hydraulic press 5. The standard mold 2 consists of 2 connectable inclined steel hollow cylinders, 2 right-angled steel hollow cylinders (used for the upper and lower positions of the standard mold 2), 1 trapezoidal steel hollow cylinder and 1 connectable horizontal steel hollow cylinder. The inclined steel hollow cylinder has an inner diameter of 50mm, a wall thickness of 10mm, an inclination angle of 20°, and a height of 25mm (1 piece), 50mm (1 piece), the right-angled steel hollow cylinder has an inner diameter of 50mm, a wall thickness of 10mm, one side is horizontal, the other side is inclined at an angle of 20°, and the maximum height is 25mm (2 pieces), the trapezoidal steel hollow cylinder has an inner diameter of 50mm, a wall thickness of 10mm, one side is horizontal, the other side is inclined at an angle of 20°, and the height is 100mm (1 piece), the horizontal steel hollow cylinder has an inner diameter of 50mm, a wall thickness of 10mm, and a maximum height of 100mm (1 piece), a total of 200mm.

[0054] The demoulder 6 is composed of three connectable steel hollow cylinders with an inner diameter of 60 mm, a wall thickness of 80 mm, a height of 25 mm (2 pieces) and 50 mm (1 piece). A groove with an inner diameter of 70 mm and a height of 5 mm is arranged at the top of the topmost steel hollow cylinder.

[0055] The base 1 has an inner diameter of 70 mm, a wall thickness of 10 mm, a height of 15 mm, and an inner height of 5 mm.

[0056] The compactor 4 is an inclined steel solid cylinder (1 piece) and a horizontal steel solid cylinder (1 piece). The inclined steel solid cylinder has a diameter of 50 mm, an inclination angle of 20°, and a maximum height of 100 mm; the horizontal steel solid cylinder (1 piece) has a diameter of 50 mm and a height of 100 mm. There is a disk on the top of the compactor 4, which has a diameter of 70 mm and a height of 5 mm; the disk forms a force-bearing platform for the compactor 4.

[0057] When making a rock sample, according to the requirements of the combined rock mass to be made, the standard mold 2 of the required corresponding height is placed under the base 1, and a 100mm high standard mold 2 of a trapezoidal steel hollow cylinder is placed on it. If there is a crack, a crack making line 3 is drawn between the two spliced ​​molds and compacted, and then the making material is added and compacted with the inclined material compactor 4, and then the molds are placed in sequence and the above process is repeated until the height of the standard rock sample is reached. When demolding, a demolding device 6 of the corresponding height is selected and placed on the base 1, and the standard mold 2 of the compacted rock sample is placed on it and the rock sample is removed by pressurizing with the material compactor 4.

[0058] The present invention also provides a method for using a device for making standard rock samples of various specifications. The method for using the device for making standard rock samples of various specifications includes the following steps:

[0059] Step 1, according to the height of the rock sample to be made, select multiple mold units to form a standard mold 2, and place the standard mold 2 on the base 1; according to the cracks to be made, draw a crack making line 3 in the standard mold 2.

[0060] The mold units in the standard mold 2 are spliced ​​upward in sequence. After each mold unit is placed, the rock sample material is filled into the mold unit. After the rock sample material fills the mold unit, it is compacted by the rammer 4. The above steps are repeated to complete the splicing of the standard mold 2 and the filling of the material.

[0061] That is, when making a rock sample with a joint angle, each time a mold unit is installed, it is compacted once, thereby forming a natural joint. When it is necessary to pull the fracture making line 3 between two mold units, first fix one end of the fracture making line 3 to the bottom of the mold unit, and pass the fracture making line 3 through the mold unit. After the material in the mold unit is compacted and the next mold unit is placed, the other end of the fracture making line 3 is fixed to the next mold unit; when the fracture making line 3 is pulled in only one mold unit, the two ends of the fracture making line 3 can be directly fixed to the mold unit.

[0062] Step 2, place the compactor 4 on the top of the standard mold 2, and then place the standard mold 2 and the compactor 4 in the hydraulic press 5; turn on the hydraulic press 5 to press down the compactor 4 until the force-bearing platform of the compactor 4 fits with the top of the standard mold 2, and the pressing of the rock sample is completed.

[0063] Step 3, using different proportions of materials, selecting mold units of different specifications to form a standard mold 2, and repeating the above steps until the height of the standard rock sample is reached.

[0064] Step 4, place the already pressed standard mold 2 into the demolding device 6, and place the base 1 under the demolding device 6; place the tamping device 4 above the standard mold 2, and place the assembled base 1, demolding device 6, standard mold 2 and tamping device 4 in the hydraulic press 5; at the same time, release the fixation of both ends of the fracture making line 3, so that the fracture making line 3 can be pressed out of the standard mold 2 together with the rock sample.

[0065] Step 5, start the hydraulic press 5 and apply downward pressure evenly until the rock sample escapes from the standard mold 2 and falls into the demolding device 6.

[0066] Step 6, taking the demoulder 6 out of the rock sample, and pulling the crack making line 3 out of the rock sample to form cracks in the rock sample, thereby completing the making of the rock sample.

[0067] In summary, in the technical solution of the device for making standard rock samples of various specifications provided by the present invention, the angle of the inclined surface of the mold unit is set according to the joint inclination angle that needs to be set, thereby providing a basis for making rock samples with joint inclination angles, and making rock samples with various joint angles. After the rock sample is pressed into shape and taken out from the standard mold, the crack making line is pulled out of the rock sample to form a crack in the rock sample, and cracks of different lengths and different inclination angles can be made.

[0068] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A device for making standard rock samples of various specifications. It is characterized in that The device comprises a base and a standard mold; The base is provided with a placement groove, the standard mold is arranged in the placement groove of the base, and the standard mold is a hollow cylindrical shape; The standard mold includes a plurality of mold units, the bottom surface of the mold unit at the bottom and the top surface of the mold unit at the top are both horizontal planes, and there are the same inclined planes between two adjacent mold units, and the angle of the inclined plane is set to the required joint inclination angle; The device also includes a hydraulic press and a tamper, and the interior of the standard mold is a hollow cylindrical shape; The outer diameter of the tamper is the same as the inner diameter of the standard mold, and the tamper extends into the interior of the standard mold; the hydraulic press presses the tamper downward, and the tamper presses the material inside the standard mold to form a rock sample; The mold unit located at the bottom of the standard mold is a solid structure, and the lower end surface of the tamper has the same inclination angle as the inclined surface; The device also includes a demoulder, which is in the shape of a hollow cylinder; The uppermost part of the demoulder is provided with a groove, and the standard mold is seated in the groove above the demoulder.

2. The device for producing standard rock samples of various specifications according to claim 1, It is characterized in that A crack forming line is provided in any die unit.

3. The device for producing standard rock samples of various specifications according to claim 2, It is characterized in that The crack making line penetrates the inner cavity of the standard mold.

4. The device for producing standard rock samples of various specifications according to claim 1, It is characterized in that A force-bearing platform is arranged on the top of the tamping device, and the diameter of the force-bearing platform is larger than the diameter of the tamping device.

5. The device for producing standard rock samples of various specifications according to claim 1, It is characterized in that The inner diameter of the demoulding device is larger than the inner diameter of the standard mold, and the height of the demoulding device is higher than the standard mold, so that the pressed rock sample can be pressed into the demoulding device.

6. Method for using the device for making standard rock samples of various specifications, It is characterized in that The method for using the device for preparing standard rock samples of various specifications according to claims 1-5 comprises the following steps: Step 1: According to the height of the rock sample to be made, multiple mold units are selected to form a standard mold, and the standard mold is placed on a base; according to the cracks to be made, a crack making line is drawn in the standard mold; The mold units in the standard mold are spliced ​​upward in sequence. After each mold unit is placed, the rock sample material is filled into the mold unit. After the rock sample material fills the mold unit, it is compacted by a tamper. The above steps are repeated to complete the splicing of the standard mold and the filling of the material. Step 2: Place the tamper on top of the standard mold, and then place the standard mold and the tamper in a hydraulic press; start the hydraulic press to press the tamper until the force-bearing platform of the tamper fits with the top of the standard mold, thus completing the pressing of the rock sample; Step 3, using different proportions of materials, selecting mold units of different specifications to form a standard mold, and repeating the above steps until the height of the standard rock sample is reached; Step 4, placing the already pressed standard mold into the demoulder, and placing the base under the demoulder; placing the tamping device on the standard mold, and placing the assembled base, demoulder, standard mold and tamping device in the hydraulic press; Step 5, start the hydraulic press and apply downward pressure evenly until the rock sample is released from the standard mold and falls into the demolding device; Step 6, taking the rock sample out of the demoulder, and pulling the crack making wire out of the rock sample to form a crack in the rock sample, thereby completing the making of the rock sample.

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