Filling type irregular columnar jointed rock mass sample preparation mold

Abstract

The utility model belongs to the technical field of rock mechanics tests, and provides a filling type irregular columnar jointed rock mass sample preparation mold which comprises an irregular columnar jointed inserting plate, and an irregular columnar jointed upper end plate and an irregular columnar jointed bottom plate are arranged at the top and the bottom of the irregular columnar jointed inserting plate respectively. An opening is formed in the irregular columnar joint upper end plate, and irregular columnar joint network structures are arranged on the opening and the top of the irregular columnar joint bottom plate correspondingly. The coaming assembly comprises a plurality of side plate pieces, and the side plate pieces are detachably connected to the outer sides of the irregular columnar joint upper end plate, the irregular columnar joint insertion plate and the irregular columnar joint bottom plate; and the top sealing assembly comprises a top plate arranged at the top of the irregular columnar joint upper end plate, and the top plate is detachably connected with the side plate pieces. The operation process for preparing the rock mass sample is simple, the device is suitable for mass production, and the precision of the produced sample is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of rock mechanics tests, in particular to a filling type irregular columnar joint rock mass sample preparation mold. Background Art

[0002] Columnar jointed rock mass is a special type of rock mass formed by cooling and contraction of lava after volcanic eruption. Ideally, the cooling of homogeneous lava will form hexagonal joints. However, due to the heterogeneity of lava, convection and uneven contraction occur during the cooling of lava, thus forming four prisms, five prisms, six prisms, seven prisms and even other irregular columnar joints. However, there are many difficulties in the in-situ test of columnar jointed rock mass, and indoor tests using rock-like materials have become the mainstream method for studying columnar jointed rock mass.

[0003] The mainstream design idea of ​​the existing filling-type irregular columnar jointed rock sample preparation mold is only used to prepare rock-like material prisms (such as the patent with announcement number CN207610926U, titled "Irregular Columnar Jointed Rock Test Model" or the patent with publication number CN110376030A, titled "A Method for Preparing Irregular Columnar Jointed Rock Samples"), that is, the mold only contains a number of irregular prismatic cavities, and the preparation of the filling-type irregular columnar jointed rock sample cannot be prepared only by the mold, and manual bonding is still required after demolding; this method is difficult to form in one time, the process is complicated, and the bonding process is usually accompanied by manual errors and it is difficult to control the joint width.

[0004] The patent with publication number CN105388047A and titled "Method for preparing core samples of columnar joint fracture network model" mentions a mold that can remove the plug and refill the gap filling material. The mold can realize the one-time preparation of filled irregular columnar jointed rock samples, but the mold has a significant defect: after the plug is pulled out, the cavity will inevitably close under the action of its own weight, resulting in uncontrollable thickness of the joint surface filling layer, thereby affecting the final test results. Utility Model Content

[0005] The utility model aims to provide a filling type irregular columnar joint rock sample preparation mold to solve the above problems and achieve the purpose of high rock sample preparation accuracy, simple operation and suitability for mass production.

[0006] To achieve the above purpose, the utility model provides the following solution: a filling type irregular columnar jointed rock mass sample preparation mold, comprising:

[0007] An irregular columnar joint plug plate, wherein the top and bottom of the irregular columnar joint plug plate are respectively provided with an irregular columnar joint upper end plate and an irregular columnar joint bottom plate, an opening is opened on the irregular columnar joint upper end plate, and the opening and the top of the irregular columnar joint bottom plate are respectively provided with an irregular columnar joint network structure, and the irregular columnar joint network structure is arranged corresponding to the irregular columnar joint plug plate;

[0008] A panel assembly, the panel assembly comprising a plurality of side panels, the plurality of side panels being detachably connected to the outer sides of the irregular columnar joint upper end plate, the irregular columnar joint plug plate and the irregular columnar joint bottom plate;

[0009] A top sealing assembly comprises a top plate arranged on the top of the upper end plate of the irregular columnar joint, and the top plate is detachably connected to a plurality of the side plates.

[0010] Preferably, the irregular columnar joint network structure and the network structure of the irregular columnar joint plug plate are generated by extrusion of the same Voronoi graph.

[0011] Preferably, the thickness of the irregular columnar joint plug plate is 0.2 mm to 2 mm.

[0012] Preferably, the side panel comprises a left L-shaped side panel and a right L-shaped side panel, both ends of the left L-shaped side panel and both ends of the right L-shaped side panel are detachably connected, the irregular columnar joint bottom plate is detachably connected to the bottom of the left L-shaped side panel and the right L-shaped side panel, and the irregular columnar joint upper end plate and the irregular columnar joint plug plate are arranged on the inner side of the left L-shaped side panel and the right L-shaped side panel.

[0013] Preferably, a left side plate grouting hole is opened at the top of the side wall of the left L-shaped side plate, and a right side plate grouting hole is opened at the bottom of the side wall of the right L-shaped side plate.

[0014] Preferably, a plurality of through holes are vertically opened at the top and bottom of the left L-shaped side panel, the top and bottom of the right L-shaped side panel and the edge of the top panel, and a plurality of the through holes are used for passing bolts, and the top panel is fixedly connected to the top of the left L-shaped side panel and the right L-shaped side panel by means of a plurality of the bolts and a plurality of nuts.

[0015] Compared with the prior art, the utility model has the following advantages and technical effects:

[0016] 1. The utility model provides a filling type irregular columnar jointed rock sample preparation mold, which has the characteristics of precise sample molding, overcomes the shortcomings of the traditional manual column bonding process, and avoids manual errors.

[0017] 2. The utility model provides a filling type irregular columnar jointed rock sample preparation mold, which is simple to operate, has low labor requirements, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the mold for preparing the utility model;

[0020] Figure 2 It is the assembly drawing of the utility model at the sample casting stage;

[0021] Figure 3 It is the assembly drawing of the utility model at the grouting stage;

[0022] Figure 4 A schematic diagram of a standard cylindrical sample obtained by drilling and coring at an inclination angle of 60° based on the sample prepared in the present invention;

[0023] Among them, 1. irregular columnar joint upper end plate; 2. irregular columnar joint plug plate; 3. irregular columnar joint bottom plate; 4. top plate; 5. left L-shaped side plate; 51. left plate grouting hole; 6. right L-shaped side plate; 61. right plate grouting hole; 7. bolts; 8. nuts; 9. irregular columnar joint network structure. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Reference Figure 1-Figure 4 The utility model provides a filling type irregular columnar jointed rock mass sample preparation mold, comprising:

[0027] An irregular columnar joint plug plate 2, the top and bottom of the irregular columnar joint plug plate 2 are respectively provided with an irregular columnar joint upper end plate 1 and an irregular columnar joint bottom plate 3, an opening is opened on the irregular columnar joint upper end plate 1, and the opening and the top of the irregular columnar joint bottom plate 3 are respectively provided with an irregular columnar joint network structure 9, and the irregular columnar joint network structure 9 is arranged corresponding to the irregular columnar joint plug plate 2;

[0028] The enclosure assembly includes a plurality of side panels, and the plurality of side panels are detachably connected to the outer sides of the irregular columnar joint upper end plate 1, the irregular columnar joint plug plate 2 and the irregular columnar joint bottom plate 3;

[0029] The top sealing assembly comprises a top plate 4 arranged on the top of the upper end plate 1 of the irregular columnar joint, and the top plate 4 is detachably connected to a plurality of side plates.

[0030] The main functions of the irregular columnar joint upper end plate 1, the irregular columnar joint network structure 9 on the irregular columnar joint bottom plate 3 and the irregular columnar joint plug plate 2 are to be used for casting complete polygonal columns in the sample casting stage; in the grouting stage, the main functions of the irregular columnar joint upper end plate 1 and the irregular columnar joint bottom plate 3 are to fix the polygonal columns in position; several side plates and the irregular columnar joint bottom plate 3 can form a container structure, which is convenient for pouring or grouting into the irregular columnar joint plug plate 2 and the irregular columnar joint network structure 9 to prevent slurry from flowing out; the main function of the top plate 4 is to prevent slurry from flowing out from the top of several side plates in the grouting stage. On the whole, the rock sample production of the utility model has high precision, simple operation, low labor demand, and is suitable for mass production.

[0031] According to a further optimization scheme, the materials of the irregular columnar joint upper end plate 1, the irregular columnar joint plug plate 2 and the irregular columnar joint bottom plate 3 are preferably polypropylene (PP) or polytetrafluoroethylene (PTFE) or other non-polar materials.

[0032] According to a further optimization scheme, the network structure of the irregular columnar joints 9 and the network structure of the irregular columnar joints plug plate 2 are generated by extrusion of the same Voronoi graph.

[0033] like Figure 1 As shown, the network structure Voronoi graphs of the irregular columnar joint network structure 9 and the irregular columnar joint plug plate 2 can be randomly generated by the algorithm. By setting the network structure of the irregular columnar joint network structure 9 and the network structure of the irregular columnar joint plug plate 2 to the same structure, a continuous columnar joint network can still be formed after assembly, which is convenient for casting a complete polygonal column.

[0034] According to a further optimization scheme, the thickness of the irregular columnar joint plug plate 2 is 0.2 mm to 2 mm.

[0035] A further optimized solution is provided, wherein the side panel comprises a left L-shaped side panel 5 and a right L-shaped side panel 6, both ends of the left L-shaped side panel 5 and the right L-shaped side panel 6 are detachably connected, the irregular columnar joint bottom plate 3 is detachably connected to the bottom of the left L-shaped side panel 5 and the right L-shaped side panel 6, and the irregular columnar joint upper end plate 1 and the irregular columnar joint plug plate 2 are arranged on the inner side of the left L-shaped side panel 5 and the right L-shaped side panel 6.

[0036] A further optimization scheme is that slots (not shown in the figure) are opened at the bottom of the left L-shaped side panel 5 and the right L-shaped side panel 6. The main function of the slots is to clamp the irregular columnar joint bottom plate 3 to the bottom of the left L-shaped side panel 5 and the right L-shaped side panel 6.

[0037] like Figure 1 As shown, the outer walls of the left L-shaped side panel 5 and the right L-shaped side panel 6 are fixedly connected with reinforcing ribs. The two ends of the left L-shaped side panel 5 and the right L-shaped side panel 6 are respectively fixedly connected with ear plates. The operator uses bolts to pass the bolts through the ear plates of the left L-shaped side panel 5 and the right L-shaped side panel 6 and tighten the nuts to achieve the connection between the left L-shaped side panel 5 and the right L-shaped side panel 6.

[0038] According to a further optimization scheme, a left side plate grouting hole 51 is opened at the top of the side wall of the left L-shaped side plate 5 , and a right side plate grouting hole 61 is opened at the bottom of the side wall of the right L-shaped side plate 6 .

[0039] According to a further optimization scheme, a plurality of through holes are vertically opened on the top and bottom of the left L-shaped side panel 5, the top and bottom of the right L-shaped side panel 6, and the edge of the top panel 4, and the plurality of through holes are used to pass bolts 7. The top panel 4 is fixedly connected to the top of the left L-shaped side panel 5 and the right L-shaped side panel 6 by a plurality of bolts 7 and a plurality of nuts 8.

[0040] like Figure 1 and Figure 3 As shown, eight groups of through holes are respectively provided at the top and bottom of the left L-shaped side plate 5, the top and bottom of the right L-shaped side plate 6, and the edge of the top plate 4. The operator uses eight bolts 7 to successively penetrate the bottom through holes, top through holes, and through holes on the top plate 4 of the left L-shaped side plate 5 and the right L-shaped side plate 6, and tightens the nuts 8 at the protruding ends of the bolts 7 to fix the top plate 4 to the top of the left L-shaped side plate 5 and the right L-shaped side plate 6 to prevent the slurry from flowing out from the top of the left L-shaped side plate 5 and the right L-shaped side plate 6 during the grouting process.

[0041] The working process of this embodiment is as follows:

[0042] S1, placing the irregular columnar joint bottom plate 3 in the slots at the bottom of the left L-shaped side plate 5 and the right L-shaped side plate 6, and tightly connecting the left L-shaped side plate 5 and the right L-shaped side plate 6 by bolts and nuts;

[0043] S2, insert the irregular columnar joint insert plate 2 and the irregular columnar joint upper end plate 1 into the mold formed by the left L-shaped side plate 5, the right L-shaped side plate 6, and the irregular columnar joint bottom plate 3 in sequence to form a Figure 2 Status shown.

[0044] S3, using gypsum-based and silicate cement-based materials to cast the sample into the mold, scrape the upper surface of the upper end plate 1 of the irregular columnar joint, and let it stand until the sample has early strength. The choice of casting material depends on the target strength of the sample;

[0045] S4, demoulding and removing the mold, then repeating the step of S1 to reassemble the irregular columnar joint bottom plate 3, the left L-shaped side plate 5 and the right L-shaped side plate 6;

[0046] S5, then insert the irregular polygonal columns cast in S3 into the holes corresponding to the irregular columnar joint network structure 9 on the irregular columnar joint bottom plate 3 according to their shapes. After all the insertions are completed, place the irregular columnar joint upper end plate 1 on the top to fix the polygonal columns. Then cover the top plate 4 and fix the top plate 4 with bolts 7 and nuts 8 to form a structure as shown in FIG. Figure 3 The status shown;

[0047] S6. Add white cement or cement slurry from the right side plate grouting hole 61 on the right L-shaped side plate 6 to fill the cavity at the joint. After the slurry flows out from the left side plate grouting hole 51 on the left L-shaped side plate 5 and flows out steadily for a period of time, stop grouting and let it stand until the white cement or cement slurry has early strength. The grouting material should be selected with a material that is significantly different in color from the prism, and the strength should be much lower than the strength of the prism;

[0048] S7. Demould and cure until the sample reaches the expected strength. Since the joint surface material is lower than the column itself and there is a material interface, the formed sample model can better simulate the mechanical behavior of natural irregular columnar jointed rock mass.

[0049] S8. Drill and core at an inclination angle (0° to 90°) to make a standard uniaxial compression specimen, such as Figure 4 shown.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A filling type irregular columnar jointed rock mass sample preparation mold, characterized in that: include: An irregular columnar joint plug plate (2), wherein the top and bottom of the irregular columnar joint plug plate (2) are respectively provided with an irregular columnar joint upper end plate (1) and an irregular columnar joint bottom plate (3), an opening is provided on the irregular columnar joint upper end plate (1), and an irregular columnar joint network structure (9) is respectively provided on the opening and the top of the irregular columnar joint bottom plate (3), and the irregular columnar joint network structure (9) is arranged corresponding to the irregular columnar joint plug plate (2); A panel assembly, the panel assembly comprising a plurality of side panels, the plurality of side panels being detachably connected to the outer sides of the irregular columnar joint upper end plate (1), the irregular columnar joint plug plate (2) and the irregular columnar joint bottom plate (3); A top sealing assembly, comprising a top plate (4) arranged on the top of the irregular columnar joint upper end plate (1), wherein the top plate (4) is detachably connected to a plurality of the side plates.

2. A filling type irregular columnar jointed rock sample preparation mold according to claim 1, characterized in that: The irregular columnar joint network structure (9) and the network structure of the irregular columnar joint plug plate (2) are generated by extrusion of the same Voronoi graph.

3. A filling type irregular columnar jointed rock sample preparation mold according to claim 1, characterized in that: The thickness of the irregular columnar joint plug plate (2) is 0.2 mm to 2 mm.

4. A filling type irregular columnar jointed rock sample preparation mold according to claim 1, characterized in that: The side panel comprises a left L-shaped side panel (5) and a right L-shaped side panel (6); the two ends of the left L-shaped side panel (5) and the two ends of the right L-shaped side panel (6) are detachably connected; the irregular columnar joint bottom plate (3) is detachably connected to the bottom of the left L-shaped side panel (5) and the right L-shaped side panel (6); the irregular columnar joint upper end plate (1) and the irregular columnar joint plug plate (2) are arranged on the inner sides of the left L-shaped side panel (5) and the right L-shaped side panel (6).

5. A filling type irregular columnar jointed rock sample preparation mold according to claim 4, characterized in that: A left side plate grouting hole (51) is provided at the top of the side wall of the left L-shaped side plate (5), and a right side plate grouting hole (61) is provided at the bottom of the side wall of the right L-shaped side plate (6).

6. A filling type irregular columnar jointed rock sample preparation mold according to claim 4, characterized in that: A plurality of through holes are respectively vertically provided at the top and bottom of the left L-shaped side panel (5), the top and bottom of the right L-shaped side panel (6) and the edge of the top panel (4), and a plurality of the through holes are used to pass bolts (7). The top panel (4) is fixedly connected to the top of the left L-shaped side panel (5) and the right L-shaped side panel (6) by means of a plurality of the bolts (7) and a plurality of nuts (8).

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