A deep rock in-situ simulation preparation solidification device

Abstract

The application relates to the technical field of deep rock in-situ simulation preparation, and discloses a deep rock in-situ simulation preparation curing device, which comprises a cuboid shell, and X-axis loading devices, Y-axis loading devices and Z-axis loading devices are arranged in the shell; the X-axis loading devices comprise a lead screw X, a sliding block X and a push plate X, the Y-axis loading devices comprise a lead screw Y, a sliding block Y and a push plate Y, and the Z-axis loading devices comprise a lead screw Z, a sliding block Z and a push plate Z; the X-axis loading devices, the Y-axis loading devices and the Z-axis loading devices all form lead screw nut mechanisms, the push plate X, the push plate Y and the push plate Z are perpendicular to each other, and the push plate X, the push plate Y and the push plate Z and three surfaces of a corner of the shell can jointly enclose a loading area in the form of a cuboid; the deep rock in-situ simulation preparation curing device can simulate preparation of deep rock containing internal stress through mechanical three-way loading, can replace a laboratory testing machine to complete loading, and has a small and compact overall structure and a reasonable arrangement, and the rock sample can be turned over at regular time intervals during preparation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep rock in-situ simulation preparation, in particular to a deep rock in-situ simulation preparation curing device. BACKGROUND

[0002] With the exhaustion of shallow resources on the earth, resource exploitation activities gradually develop to the deep, and compared with shallow resources, the geological conditions and stress environment of deep rock mass are more complex. Because the rock core will experience an instantaneous internal stress release process after being taken out from the deep, the rock will be damaged to a certain extent, and it is difficult to reflect the occurrence environment and structural state of the deep engineering area. Even if the deep rock mass is taken out, it is also difficult to carry out in-situ physical and mechanical experimental research on the deep rock mass on the indoor scale.

[0003] At present, in the laboratory environment, the deep in-situ rock under the ground stress environment is usually simulated and prepared for research, and the preparation process is as follows: first, the particle raw materials and mass fraction are determined according to the composition of the rock mass to be tested, the particle raw materials are put into the mold, and the strain gauges are pre-embedded in the particle gap; then, the mold is subjected to axial compression and confining pressure according to different stress loading paths; after the stress loading is stable, the mold is injected with adhesive material, and the injection is stopped after the gap is completely filled; the stress loading is kept stable, the mold is kept stationary, and the adhesive material is allowed to solidify.

[0004] At present, in the laboratory simulation preparation of in-situ deep rock under the ground stress environment, stress loading is usually carried out on a conventional triaxial testing machine to complete the preparation, and the conventional triaxial testing machine can only load two values of different axial compression and confining pressure. From the perspective of three-dimensional stress, two stress values in the conventional triaxial testing machine are always equal, and it cannot realize the loading path of different three-dimensional stress, and the prepared internal stress rock sample has limitations. In addition, the stress loading and maintaining process needs to be completed on the testing machine, and the commonly used triaxial stress testing machine is usually fixedly installed. The solidification process of the adhesive material takes about 28 days, the preparation process of the in-situ rock occupies a lot of experimental equipment resources, and it is difficult to realize batch preparation. At the same time, due to the long solidification time, the upper and lower parts of the prepared in-situ rock sample have different compaction degrees due to the influence of the material's own gravity settlement during the waiting period for the solidification of the adhesive material, and the internal stress of the in-situ rock deviates from the set value. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a deep rock in-situ simulation preparation curing device, which can simulate and prepare deep rock containing internal stress through mechanical three-dimensional loading of different stress, and the overall structure of the device is small, compact and reasonable.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] The application discloses a solidification device for deep rock in-situ simulation preparation, which comprises a cuboid shell, wherein an X-axis loading device, a Y-axis loading device and a Z-axis loading device are arranged in the shell; the X-axis loading device comprises a screw rod X, a sliding block X and a push plate X, the screw rod X is rotatably connected with the shell, the sliding block X is slidably connected with the shell, the sliding block X is threadedly connected with the screw rod X, and the push plate X is fixedly connected with the sliding block X; the Y-axis loading device comprises a screw rod Y, a sliding block Y and a push plate Y, the screw rod Y is rotatably connected with the shell, the sliding block Y is slidably connected with the shell, the sliding block Y is threadedly connected with the screw rod Y, and the push plate Y is fixedly connected with the sliding block Y; the Z-axis loading device comprises a screw rod Z, a sliding block Z and a push plate Z, the screw rod Z is rotatably connected with the shell, the sliding block Z is slidably connected with the shell, the sliding block Z is threadedly connected with the screw rod Z, and the push plate Z is fixedly connected with the sliding block Z; the push plate X, the push plate Y and the push plate Z are perpendicular to each other, and the side, away from the sliding block X, of the push plate X, the side, away from the sliding block Y, of the push plate Y and the side, away from the sliding block Z, of the push plate Z are combined with three sides of a corner of the shell to form a loading area in the form of a cuboid.

[0008] Further, a driving device is further arranged in the shell, the driving device comprises a loading motor, a gear shaft, a hollow shaft, a lifting device, an intermediate gear, a transmission shaft X and a transmission shaft Y; the gear shaft, the hollow shaft, the transmission shaft X and the transmission shaft Y are parallel to the screw rod Z, the gear shaft is rotatably connected with the shell, and the loading motor is used for driving the gear shaft to rotate; the intermediate gear is rotatably sleeved on the hollow shaft, the lifting device is used for driving the hollow shaft to move along the axial direction, the intermediate gear is meshed with the gear shaft, and the intermediate gear is slidably matched with the gear shaft; the transmission shaft X is rotatably connected with the shell, one end of the transmission shaft X is fixedly sleeved with a first bevel gear X, the screw rod X is fixedly sleeved with a second bevel gear X, and the first bevel gear X is meshed with the second bevel gear X; the transmission shaft Y is rotatably connected with the shell, one end of the transmission shaft Y is fixedly sleeved with a first bevel gear Y, the screw rod Y is fixedly sleeved with a second bevel gear Y, and the first bevel gear Y is meshed with the second bevel gear Y; the screw rod Z, the transmission shaft X and the transmission shaft Y are all fixedly sleeved with driven gears, and the three driven gears are respectively meshed with the intermediate gear.

[0009] Further, the lifting device comprises a lifting motor, a lifting screw rod and a guide rod, the lifting motor and the guide rod are fixedly arranged in the shell, the lifting screw rod is rotatably arranged in the shell, the lifting screw rod penetrates through the hollow shaft along the axial line of the hollow shaft and is threadedly connected with the hollow shaft, the output end of the lifting motor is fixedly connected with one end of the lifting screw rod, the guide rod is parallel to the lifting screw rod, a sliding hole is arranged through the hollow shaft, and the sliding hole is slidably matched with the guide rod.

[0010] Further, the two ends of each tooth on the intermediate gear are provided with sharp guides.

[0011] Further, the shell comprises a bottom plate, the side of the push plate Z away from the sliding block Z is arranged opposite to the bottom plate, the shell is connected with the first cover plate and the second cover plate through bolts, the side of the push plate X away from the sliding block X is arranged opposite to the first cover plate, the side of the push plate Y away from the sliding block Y is arranged opposite to the second cover plate, and the push plate X, the push plate Y, the push plate Z, the first cover plate, the second cover plate and the bottom plate enclose the loading area.

[0012] Further, the loading area is provided with a hollow cube mold box, the mold box is made of elastic material, and the six surfaces of the mold box are respectively abutted with the push plate X, the push plate Y, the push plate Z, the first cover plate, the second cover plate and the bottom plate; the mold box is provided with a center stress sheet and eight corner stress sheets, the eight corner stress sheets are distributed to enclose a simulated cube, and the center stress sheet is located at the geometric center of the simulated cube.

[0013] Further, the side of the mold box close to the first cover plate is communicated with a first grouting pipe and a first back grouting pipe, the other end of the first grouting pipe and the other end of the first back grouting pipe are communicated with the outside of the shell through the first cover plate, the first back grouting pipe is arranged at a corner of the mold box close to the push plate Y and close to the push plate Z, and the first grouting pipe is arranged at a corner of the mold box close to the push plate Y and close to the bottom plate; the side of the mold box close to the second cover plate is communicated with a second grouting pipe and a second back grouting pipe, the other end of the second grouting pipe and the other end of the second back grouting pipe are communicated with the outside of the shell through the second cover plate, the second back grouting pipe is arranged at a corner of the mold box close to the push plate X and close to the push plate Z, and the second grouting pipe is arranged at a corner of the mold box close to the push plate X and close to the bottom plate.

[0014] The beneficial effects of the application are:

[0015] The deep rock in-situ simulation preparation curing device comprises a shell in the shape of a cuboid, a loading area is formed at one corner of the shell, and the loading area is used for loading the mold box when the in-situ rock sample containing internal stress is prepared. X-axis loading device, Y-axis loading device and Z-axis loading device are arranged in the preparation device, and the mold box can be loaded with stress in the X-axis direction, Y-axis direction and Z-axis direction, and each loading device is a screw nut mechanism based on a trapezoidal screw rod, and self-locking is formed after loading is completed, so that the stability of the loading force is maintained. The driving device integrated in the shell comprises a loading motor, a gear shaft, a hollow shaft, a lifting device, an intermediate gear, a transmission shaft X and a transmission shaft Y. Through the design of the transmission structure, the loading motor can complete the stress loading process in the X-axis direction, Y-axis direction and Z-axis direction. The whole device is small in structure, compact in structure, reasonable in layout, and can replace the laboratory testing machine to complete the loading. The device is in the shape of a cuboid. On the one hand, the device can be turned over at regular time intervals during the curing stage to eliminate the influence of the settlement of the material itself during the solidification of the bonding material, so that the compaction degree of each part of the prepared in-situ rock sample is basically consistent. On the other hand, the device is convenient to stack, and is beneficial to saving the laboratory space when a plurality of devices simultaneously prepare in-situ rock samples in batches. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an appearance structure schematic diagram of the deep rock in-situ simulation preparation curing device.

[0017] Figure 2 It is a disassembled structure schematic diagram of the deep rock in-situ simulation preparation curing device before the mold box is installed.

[0018] Figure 3 It is an internal structure schematic diagram of the deep rock in-situ simulation preparation curing device. Figure 1

[0019] Figure 4 It is an internal structure schematic diagram of the deep rock in-situ simulation preparation curing device. Figure 2

[0020] Figure 5 It is a structure schematic diagram of the lifting device in the deep rock in-situ simulation preparation curing device.

[0021] Figure 6 It is a structure schematic diagram of the gear A in the deep rock in-situ simulation preparation curing device.

[0022] ​​In the figure, 1 - shell, 2 - mold box, 3 - loading motor, 4 - bottom plate, 5 - first cover plate, 6 - second cover plate, 7 - first grouting pipe, 8 - first back grouting pipe, 9 - second grouting pipe, 10 - second back grouting pipe, 11 - screw rod X, 12 - sliding block X, 13 - push plate X, 14 - transmission shaft X, 15 - first bevel gear X, 16 - second bevel gear X, 21 - screw rod Y, 22 - sliding block Y, 23 - push plate Y, 24 - transmission shaft Y, 25 - first bevel gear Y, 26 - second bevel gear Y, 31 - screw rod Z, 32 - sliding block Z, 33 - push plate Z, 41 - gear shaft, 42 - intermediate gear, 43 - hollow shaft, 44 - driven gear, 45 - lifting motor, 46 - lifting screw rod, 47 - guide rod, 48 - pointed guide. DETAILED DESCRIPTION

[0023] The technical solutions of the present application are described in further detail below in combination with the drawings, but the protection scope of the present application is not limited to the following description.

[0024] In the preparation of deep rock in-situ simulation, the following steps are included:

[0025] S1, the particle raw material is put into the mold box, and the strain gauge is pre-embedded in the particle gap;

[0026] S2, the mold box is loaded with pressure according to different stress loading paths until the stress value detected by the strain gauge is the set value, and the stress loading is stable;

[0027] S3, the mold box is filled with adhesive material;

[0028] S4, curing until the adhesive material is completely solidified.

[0029] Figures 1 to 6The shown one kind of deep rock in-situ simulation preparation solidification device is the special equipment for loading the mold box, and completing the special equipment of the above deep rock in-situ simulation preparation process. Its structure includes a cuboid shell 1, and a loading area is formed in a corner of the shell 1. X-axis loading device, Y-axis loading device and Z-axis loading device are arranged in the shell 1, wherein: the X-axis loading device includes a lead screw X11, a sliding block X12, a push plate X13, the lead screw X11 is rotatably connected with the shell 1, the sliding block X12 is slidingly connected with the shell 1, the sliding block X12 is threadedly connected with the lead screw X11, and the push plate X13 is fixedly connected with the sliding block X12; the Y-axis loading device includes a lead screw Y21, a sliding block Y22, a push plate Y23, the lead screw Y21 is rotatably connected with the shell 1, the sliding block Y22 is slidingly connected with the shell 1, the sliding block Y22 is threadedly connected with the lead screw Y21, and the push plate Y23 is fixedly connected with the sliding block Y22; the Z-axis loading device includes a lead screw Z31, a sliding block Z32, a push plate Z33, the lead screw Z31 is rotatably connected with the shell 1, the sliding block Z32 is slidingly connected with the shell 1, the sliding block Z32 is threadedly connected with the lead screw Z31, and the push plate Z33 is fixedly connected with the sliding block Z32. The above-mentioned lead screw X11, lead screw Y21 and lead screw Z31 are selected to be trapezoidal lead screws, which can respectively drive the push plate X13, push plate Y23 and push plate Z33 to move when rotating. The push plate X13, push plate Y23 and push plate Z33 are perpendicular to each other, and the side of the push plate X13 away from the sliding block X12, the side of the push plate Y23 away from the sliding block Y22 and the side of the push plate Z33 away from the sliding block Z32 can be enclosed with the three faces of the corner of the shell 1 to form a cuboid loading area.

[0030] When simulating the preparation of deep in-situ rock samples, the mold box 2 containing granular aggregate is placed in the loading area, and three of the six faces of the mold box 2 abut against the three faces of the corner of the shell 1, and the other three faces abut against the push plate X13, push plate Y23 and push plate Z33 respectively. Each face of the mold box 2 is made of elastic material, and the mold box 2 can be loaded in three directions by rotating the lead screw X11, lead screw Y21 and lead screw Z31 respectively. The loading force can cause the corresponding stress surface of the mold box 2 to deform, and then the loading force is transmitted to the granular aggregate in the mold box 2, so that the strain gauge detection value in the mold box 2 reaches the set value. After loading is completed, the lead screw X11, lead screw Y21 and lead screw Z31 stop rotating, and the self-locking characteristic of the trapezoidal lead screw can keep the loading stress stable.

[0031] The whole structure of the deep rock in-situ simulation preparation curing device is small, which can replace the laboratory testing machine. When preparing rock samples, three-directional loading can be performed and the three-directional loading forces can be different. The device is in the shape of a cuboid. On the one hand, the device can be placed with the surface turned over at regular intervals during the curing stage to eliminate the influence of the material's own gravity settlement during the setting of the adhesive material, so that the compactness of each part of the prepared in-situ rock sample is basically uniform. On the other hand, the device is convenient to stack, which is beneficial to save laboratory space when multiple devices are used to prepare in-situ rock samples in batches.

[0032] Further, as shown in Figure 3 、 Figure 4 , a driving device is further arranged in the shell 1. The driving device includes a loading motor 3, a tooth shaft 41, a hollow shaft 43, a lifting device, an intermediate gear 42, a transmission shaft X14 and a transmission shaft Y24. The tooth shaft 41, the hollow shaft 43, the transmission shaft X14 and the transmission shaft Y24 are parallel to the lead screw Z31. The tooth shaft 41 is rotatably connected to the shell 1. The output end of the loading motor 3 is connected to one end of the tooth shaft 41 through a gear box, for driving the tooth shaft 41 to rotate. The intermediate gear 42 is rotatably sleeved on the hollow shaft 43. The lifting device is used to drive the hollow shaft 43 to move axially. The intermediate gear 42 is engaged with the tooth shaft 41. The intermediate gear 42 is slidingly fitted with the tooth shaft 41. The lead screw Z31, the transmission shaft X14 and the transmission shaft Y25 are all fixedly sleeved with driven gears 44. Under the driving of the lifting device, the hollow shaft 43 drives the intermediate gear 42 to move axially. During the movement, the intermediate gear 42 can be engaged with the three driven gears 44, respectively.

[0033] When the intermediate shaft 42 moves to engage with the driven gear 44 on the lead screw Z31, the lead screw Z31 can be driven to rotate by the driving of the loading motor 3 through the pinion shaft 41, the intermediate gear 42 and the driven gear 44, thereby driving the push plate Z33 to move, completing the loading process in the Z-axis direction. The transmission shaft X14 is rotatably connected with the housing 1, one end of the transmission shaft X14 is fixedly sleeved with a first bevel gear X15, the lead screw X11 is fixedly sleeved with a second bevel gear X16, the first bevel gear X15 engages with the second bevel gear X16; when the intermediate shaft 42 moves to engage with the driven gear 44 on the transmission shaft X14, the transmission shaft X14 can be driven to rotate by the driving of the loading motor 3 through the pinion shaft 41, the intermediate gear 42 and the driven gear 44, and then the lead screw X11 is driven to rotate through the first bevel gear X15 and the second bevel gear X16, thereby driving the push plate X13 to move, completing the loading process in the X-axis direction. The transmission shaft Y24 is rotatably connected with the housing, one end of the transmission shaft Y24 is fixedly sleeved with a first bevel gear Y25, the lead screw Y21 is fixedly sleeved with a second bevel gear Y26, the first bevel gear Y25 engages with the second bevel gear Y26; when the intermediate shaft 42 moves to engage with the driven gear 44 on the transmission shaft Y24, the transmission shaft Y24 can be driven to rotate by the driving of the loading motor 3 through the pinion shaft 41, the intermediate gear 42 and the driven gear 44, and then the lead screw Y11 is driven to rotate through the first bevel gear Y25 and the second bevel gear Y26, thereby driving the push plate Y13 to move, completing the loading process in the Y-axis direction.

[0034] The driving device is arranged inside the housing 1, and the stress loading in three directions of the loading area can be automatically completed when the loading motor 3 and the lifting device are controlled. The whole device is small in structure, compact in arrangement and reasonable in layout. Specifically, the housing 1 can be in a cubic structure, and the housing 1 is divided into upper and lower areas by an intermediate partition plate. The lifting device, the pinion shaft 41, the intermediate gear 42, the hollow shaft 43, the transmission shaft X14, the transmission shaft Y24, the lead screw Z31, the sliding block Z32 and the driven gears 44 are arranged in the upper area. The lower area is divided into four small areas. One of the small areas is the loading area, and one side of the loading area is provided with an area for mounting the lead screw X11, the sliding block X12, the first bevel gear X15 and the second bevel gear X16. The other side of the loading area is provided with an area for mounting the lead screw Y21, the sliding block Y22, the first bevel gear Y25 and the second bevel gear Y26. The fourth small area is used for mounting the loading motor 3 and a control box. The control box is provided with a controller for controlling the loading motor 3 and the lifting device. The control box is provided with a circuit interface for supplying power to the whole device by an external power supply.

[0035] Specifically, as shown in FIG. 1, the housing 1 is provided with a lifting device, a loading device and a control device. Figure 5As shown, the aforementioned lifting device includes a lifting motor 45, a lifting screw rod 46 and a guide rod 47, the lifting motor 45 and the guide rod 47 are fixedly arranged in the shell 1, the lifting screw rod 46 is rotatably arranged in the shell 1, the lifting screw rod 46 penetrates the hollow shaft 43 along the axis of the hollow shaft 43 and is threadedly connected with the hollow shaft 43, the output end of the lifting motor 45 is fixedly connected with one end of the lifting screw rod 46, the guide rod 47 is parallel to the lifting screw rod 46, a sliding hole is arranged on the hollow shaft 43 and is slidably matched with the guide rod 47. The lifting device as a whole adopts a screw nut mechanism, when the lifting motor 45 rotates, the lifting screw rod 46 can be driven to rotate, thereby driving the hollow shaft 43 to slide along the guide rod 47, so as to adjust the position of the intermediate gear 42, so that it can be meshed with each driven gear 44, and in the adjustment process, the number of rotation of the lifting screw rod 46 driven by the lifting motor 45 can be used to judge the position of the intermediate gear 42, so as to facilitate the automatic control of the controller on the adjustment action.

[0036] Further, as shown in Figure 6 The two ends of each tooth of the intermediate gear 42 are provided with a sharp guide 48, and the sharp guide 48 is inclined to both sides with the center of the tooth end face. When the intermediate gear 42 is adjusted in the direction of the lifting screw rod 46, if the intermediate gear 42 is out of phase with the driven gear 44 to be meshed, the side slope of the sharp guide 48 first contacts the edge of the end face of the corresponding tooth of the driven gear 44, and as the intermediate gear 42 continues to move in the direction of the driven gear 44, the intermediate gear 42 is guided by the sharp guide 48 to rotate a certain angle on the hollow shaft 43 (in this process, the loading motor 3 is in a power-off state, and the output shaft and the tooth shaft 41 of the loading motor 3 rotate corresponding angles with the intermediate gear 42) until the intermediate gear 42 is meshed with the driven gear 44. By arranging the sharp guide 48, the phase of the intermediate gear 42 can be automatically adjusted when the intermediate gear 42 is adjusted to be meshed with different driven gears 44, so as to avoid the phenomenon of tooth collision.

[0037] In specific implementation, as Figure 2As shown, the shell 1 includes a bottom plate 4, the push plate Z33 is arranged opposite the bottom plate 4 on the side away from the sliding block Z32, the shell 1 is connected with the first cover plate 5 and the second cover plate 6 through bolts, the push plate X13 is arranged opposite the first cover plate 5 on the side away from the sliding block X12, the push plate Y23 is arranged opposite the second cover plate 6 on the side away from the sliding block Y22, and the push plate X13, the push plate Y23, the push plate Z33, the first cover plate 5, the second cover plate 6 and the bottom plate 4 enclose the aforementioned loading area. In use, after the first cover plate 5 and the second cover plate 6 are detached, the hollow cube mold box 2 is placed in the loading area, and then the first cover plate 5 and the second cover plate 6 are installed. During loading, the six surfaces of the mold box 2 are respectively in abutment with the push plate X13, the push plate Y23, the push plate Z33, the first cover plate 5, the second cover plate 6 and the bottom plate 4, the push plate X13 moves towards the first cover plate 5 to realize X-direction loading of the mold box 2, the push plate Y23 moves towards the second cover plate 6 to realize Y-direction loading of the mold box 2, and the push plate Z33 moves towards the bottom plate 4 to realize Z-direction loading of the mold box 2.

[0038] The mold box 2 is made of elastic material with certain ductility, and during the above-mentioned directional loading, the loading force can be transmitted to the inside of the mold box 2 through elastic deformation. It should be noted that due to the concave deformation of the stress surface of the mold box 2 in contact with each push plate during loading, it will cause the rock sample to be more difficult to demold. Here, the elastic material is selected for each surface of the mold box 2, and after the rock sample is prepared after curing, the stress surface rebounds (or has a rebounding tendency) when the mold box 2 is removed, making the subsequent demolding process easier.

[0039] When preparing the in-situ rock sample, the mold box 2 is first filled with granular aggregate, and then the central stress sheet and the eight corner stress sheets are pre-set in the aggregate. The distribution positions of the eight corner stress sheets enclose a simulated cube, each surface of the simulated cube is parallel to each surface of the mold box, and the central stress sheet is located at the geometric center of the simulated cube. During directional stress loading, the stress values of the embedded points are monitored through the eight corner stress sheets and the central stress sheet, and the X, Y and Z directional loading values are adjusted in real time until the set value is reached, and then the stress is kept stable before injecting the adhesive material. It should be noted that part of the simulated cube region in the prepared rock sample is the in-situ rock sample containing internal stress for experimental research.

[0040] Further, the mold box 2 is provided with a first grouting pipe 7 and a first back grouting pipe 8 on the side close to the first cover plate 5, the other end of the first grouting pipe 7 and the other end of the first back grouting pipe 8 are both communicated with the outside of the shell 1 through the first cover plate 5, the first back grouting pipe 8 is arranged at a corner of the mold box 2 close to the push plate Y23 and close to the push plate Z33, and the first grouting pipe 7 is arranged at a corner of the mold box 2 close to the push plate Y23 and close to the bottom plate 4; the mold box 2 is provided with a second grouting pipe 9 and a second back grouting pipe 10 on the side close to the second cover plate 6, the other end of the second grouting pipe 9 and the other end of the second back grouting pipe 10 are both communicated with the outside of the shell 1 through the second cover plate 6, the second back grouting pipe 10 is arranged at a corner of the mold box 2 close to the push plate X13 and close to the push plate Z33, and the second grouting pipe 9 is arranged at a corner of the mold box 2 close to the push plate X13 and close to the bottom plate 4. After the stress loading is completed, the adhesive material can be injected into the mold box 2 through the first grouting pipe 7 and the second grouting pipe 9, and after the adhesive material stably flows out from the first back grouting pipe 8 and the second back grouting pipe 10, that is, the surface grouting material has been injected into the mold box 2, at this time, the first grouting pipe 7, the first back grouting pipe 8, the second grouting pipe 9 and the second back grouting pipe 10 are blocked, and then maintenance can be carried out. During the injection of the adhesive material, the device is placed in a position such that the first grouting pipe 7 and the second grouting pipe 9 are located at the bottom of the entire device, and the injection is carried out from bottom to top, which is beneficial to fill the adhesive material in the mold box 2 and eliminate the gap; at the same time, the first grouting pipe 7 and the second grouting pipe 9 are basically located at the diagonal positions of the bottom surface of the mold box 2, and the simultaneous grouting through the first grouting pipe 7 and the second grouting pipe 9 can further ensure that the adhesive material is filled in the mold box 2.

[0041] The above description is only the preferred embodiment of the present application, and it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein by the above teaching or related art or knowledge. The modifications and changes made by those skilled in the art without departing from the spirit and scope of the present application shall be within the scope of protection of the appended claims of the present application.

Claims

1. A device for in-situ simulation and solidification of deep rocks, characterized in that, The device includes a rectangular shell, and an X-axis loading device, a Y-axis loading device, and a Z-axis loading device are provided inside the shell. The X-axis loading device includes a lead screw X, a slider X, and a push plate X. The lead screw X is rotatably connected to the housing, the slider X is slidably connected to the housing, the slider X is threadedly connected to the lead screw X, and the push plate X is fixedly connected to the slider X. The Y-axis loading device includes a lead screw Y, a slider Y, and a push plate Y. The lead screw Y is rotatably connected to the housing, the slider Y is slidably connected to the housing, the slider Y is threadedly connected to the lead screw Y, and the push plate Y is fixedly connected to the slider Y. The Z-axis loading device includes a lead screw Z, a slider Z, and a push plate Z. The lead screw Z is rotatably connected to the housing, the slider Z is slidably connected to the housing, the slider Z is threadedly connected to the lead screw Z, and the push plate Z is fixedly connected to the slider Z. The push plate X, push plate Y and push plate Z are perpendicular to each other. The three faces of the shell, which are the side of push plate X away from slider X, the side of push plate Y away from slider Y, and the side of push plate Z away from slider Z, can be enclosed by the three faces of one corner of the shell to form a cubic loading area. The housing is also equipped with a drive device, which includes a loading motor, a gear shaft, a hollow shaft, a lifting device, an intermediate gear, a transmission shaft X, and a transmission shaft Y. The gear shaft, hollow shaft, transmission shaft X, and transmission shaft Y are all parallel to the lead screw Z. The gear shaft is rotatably connected to the housing. The loading motor is used to drive the gear shaft to rotate. The intermediate gear is rotatably mounted on the hollow shaft, and the lifting device is used to drive the hollow shaft to move axially. The intermediate gear meshes with the gear shaft, and the intermediate gear slides with the gear shaft. The drive shaft X is rotatably connected to the housing. A first bevel gear X is fixedly sleeved on one end of the drive shaft X, and a second bevel gear X is fixedly sleeved on the lead screw X. The first bevel gear X meshes with the second bevel gear X. The drive shaft Y is rotatably connected to the housing. A first bevel gear Y is fixedly sleeved on one end of the drive shaft Y, and a second bevel gear Y is fixedly sleeved on the lead screw Y. The first bevel gear Y meshes with the second bevel gear Y. Driven gears are fixedly mounted on the lead screw Z, drive shaft X, and drive shaft Y, and the three driven gears can mesh with the intermediate gear respectively.

2. The in-situ simulation and solidification device for deep rock as described in claim 1, characterized in that, The lifting device includes a lifting motor, a lifting screw, and a guide rod. The lifting motor and the guide rod are fixedly installed inside the housing. The lifting screw is rotatably installed inside the housing. The lifting screw passes through the hollow shaft along its axis and is threadedly connected to the hollow shaft. The output end of the lifting motor is fixedly connected to one end of the lifting screw. The guide rod is parallel to the lifting screw. A sliding hole is provided through the hollow shaft, and the sliding hole is slidably adapted to the guide rod.

3. The in-situ simulation and solidification device for deep rock as described in claim 1, characterized in that, Each tooth on the intermediate gear is provided with a pointed guide at both ends.

4. The in-situ simulation and solidification device for deep rock as described in claim 1, characterized in that, The housing includes a base plate. The push plate Z is positioned opposite the base plate on the side away from the slider Z. A first cover plate and a second cover plate are bolted to the housing. The push plate X is positioned opposite the first cover plate on the side away from the slider X. The push plate Y is positioned opposite the second cover plate on the side away from the slider Y. The push plate X, push plate Y, push plate Z, first cover plate, second cover plate, and base plate together form the loading area.

5. The in-situ simulation and solidification device for deep rock as described in claim 4, characterized in that, The loading area is provided with a hollow cubic mold box, which is made of elastic material. The six sides of the mold box abut against the push plate X, push plate Y, push plate Z, first cover plate, second cover plate and bottom plate respectively. The mold box contains a central stress plate and eight corner stress plates. The eight corner stress plates are distributed to form a simulated cube, and the central stress plate is located at the geometric center of the simulated cube.

6. The in-situ simulation and solidification device for deep rock as described in claim 5, characterized in that, The mold box is provided with a first grouting pipe and a first return grouting pipe on the side near the first cover plate. The other end of the first grouting pipe and the other end of the first return grouting pipe both pass through the first cover plate and communicate with the outside of the shell. The first return grouting pipe is located at a corner of the mold box near the push plate Y and near the push plate Z. The first grouting pipe is located at a corner of the mold box near the push plate Y and near the bottom plate. The mold box is provided with a second grouting pipe and a second return grouting pipe on the side near the second cover plate. The other end of the second grouting pipe and the other end of the second return grouting pipe both pass through the second cover plate and communicate with the outside of the shell. The second return grouting pipe is located at a corner of the mold box near the push plate X and near the push plate Z. The second grouting pipe is located at a corner of the mold box near the push plate X and near the bottom plate.

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