Mine rock mass or cold region mine frozen soil mass large-size sample sampling method

Abstract

The invention provides a large-size sample sampling method for mine rock mass or cold region mine frozen soil mass, which comprises the following steps: marking a cutting range on a free surface, and drilling at the vertex of the cutting range; anchor rods are fixed in the drill holes; the diamond string bead rope is wound between two reversing pulleys, the reversing pulleys extend into the drill hole through a mounting rod and are connected to the top of the anchor rod, and the angle of the reversing pulleys is adjusted, so that the rope outlet direction of the reversing pulleys is the same as the to-be-cut direction; the diamond beaded rope is tensioned and connected to a rope saw, the rope saw is started, the diamond beaded rope cuts the vertical face along the to-be-cut position, the steps are repeated, and all the vertical faces are cut; the angle of the two reversing pulleys is adjusted, the diamond beaded rope winds around the rock sample subjected to vertical face cutting in the horizontal direction, the rope saw is started, the diamond beaded rope cuts along the bottom face of the rock sample, and the rock sample is taken out after cutting is completed. According to the invention, large-size sampling is facilitated, the size of the taken rock sample is relatively regular, and the damage degree is low.

Description

Technical Field

[0001] This invention relates to the field of mining rock and soil testing technology, and in particular to a method for sampling large-size samples of mining rock mass or frozen soil in cold regions. Background Technology

[0002] Testing the physical and mechanical parameters of rock and soil in mines requires sampling at the mine site, followed by laboratory testing. Currently, there are two methods for on-site sampling: one is core drilling, which involves using a core drilling rig to drill into the rock mass and extract the core samples formed during the drilling process; the other is sampling at the mining face, which involves selecting rocks separated from the rock mass using rock-breaking equipment or blasting methods at the mining face.

[0003] In studies of mine rock masses or frozen soils in cold-region mines, it is often necessary to obtain rock samples with large geometric dimensions. For example, to study the size effect of rock and soil masses or the macroscopic structure within them, the required sample size may reach 30 cm or even meters. Existing sampling methods are difficult to implement for such large-size specimens in the field, mainly due to the following problems: (1) The drilling diameter of the core drilling method is usually no more than 20cm. The special large-diameter core drilling equipment has a large external size, which is difficult to apply to underground mines. At the same time, the process is complicated and the drilling cost is expensive. (2) Sampling methods at mining faces: On the one hand, sampling can only be carried out in mines in normal production. When production is stopped or in the initial exploration stage, there is no rock breaking operation and sampling is not possible. On the other hand, the size of the sample that can be taken depends on the rock breaking process. It is usually difficult to obtain large-sized samples. The rock formed by rock breaking is damaged by cutting equipment or blasting operations, and its shape is extremely irregular, making laboratory processing difficult. Summary of the Invention

[0004] The purpose of this invention is to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a method for sampling large-size samples from mine rock masses or frozen soil masses in cold-region mines, facilitating large-size sampling and producing relatively regular-sized rock samples.

[0005] This invention provides a method for sampling large-size samples from mine rock masses or frozen soil masses in cold-region mines, comprising the following steps: S1. Draw a cutting range on the free surface of the area to be sampled, and drill holes at all vertices of the cutting range in a direction perpendicular to the free surface.

[0006] S2. Fix anchor rods at the bottom of the two adjacent boreholes respectively.

[0007] S3. Take two reversing pulleys, and wrap the diamond beaded rope between the two reversing pulleys. Use the mounting rod to insert the reversing pulley into the drill hole and detachably fix it to the top of each anchor rod. Adjust the angle of the reversing pulley so that the direction of the rope exiting the reversing pulley is the same as the direction to be cut, and the diamond beaded rope between the two drill holes is located at the position to be cut.

[0008] The reversing pulley includes a connecting block, a wheel body, a frame, and a sleeve. The frame has an internal cavity, and the wheel body is rotatably connected to both sides within the cavity. The width of the frame is smaller than the diameter of the wheel body, and both sides of the wheel body extend beyond the frame. The connecting block is fixedly connected to the top of the frame and is detachably connected to the mounting rod. The sleeve is fixedly connected to the bottom of the frame and has an internal thread. The top of the anchor rod has an external thread, and the sleeve and the top of the anchor rod are connected by threads.

[0009] The bottom of the mounting rod is a polygonal socket, and the shape of the connecting block matches the socket. The connecting block is inserted into the socket. After insertion, the mounting rod is rotated horizontally, which drives the reversing pulley to rotate synchronously at the upper end of the anchor rod to adjust the angle of the reversing pulley. The two mounting rods are detachably connected to each other in the length direction.

[0010] S4. Tighten the diamond beaded rope and connect it to the wire saw. Start the wire saw and the diamond beaded rope will cut the facade along the position to be cut. Repeat steps S2-S4 until all facades within the cutting range are cut.

[0011] S5. Using the mounting rod to adjust the angle of the two reversing pulleys, the diamond beaded rope is horizontally routed around the rock sample that has already been vertically cut. After the mounting rod is inserted into the drill hole, the diamond beaded rope is pushed to the bottom surface of the rock sample to be cut. The diamond beaded rope is tightened and connected to the wire saw. All mounting rods are removed, the wire saw is started, and the diamond beaded rope cuts along the bottom surface of the rock sample. After the cutting is completed, the rock sample is removed.

[0012] In some embodiments, in step S1, the cutting range is slightly larger than the cross-sectional area of ​​the rock sample, and the drilling depth is slightly larger than the height of the rock sample.

[0013] In some embodiments, in step S3, the two mounting rods are first connected to the two reversing pulleys respectively. The diamond beaded rope is wound around the two side tracks of the reversing pulley in the first borehole. The diamond beaded rope is temporarily fixed to the mounting rod connected to the reversing pulley in the first borehole by a strap to prevent the diamond beaded rope from falling off the reversing pulley. Then, the diamond beaded rope is led out of the first borehole and wound around the two side tracks of the other reversing pulley. The other reversing pulley is then installed in another borehole, and the angle of the two reversing pulleys is adjusted. In step S4, after the two ends of the diamond beaded rope are tightened, the strap breaks, the mounting rod is removed from the reversing pulley, and the mounting rod is taken out of the borehole.

[0014] In some embodiments, in step S4, whether each facet of the rock sample has been cut is determined based on the length of the drill hole pulled out by the diamond beaded rope.

[0015] In some embodiments, when it is necessary to obtain rock samples from deep depths, steps S2-S5 are repeated several times until rock samples of the required depth are obtained.

[0016] In some embodiments, the sidewall of the mounting rod has an arc-shaped groove, and the diamond beaded cord is temporarily fixed to the groove by a strap.

[0017] In some embodiments, a plug-in block is fixedly connected to the top of the mounting rod, and a plurality of mounting rods are axially connected in a single drill hole. Two adjacent mounting rods in a single drill hole are connected end to end by interlocking with each other.

[0018] In some embodiments, spring beads are symmetrically connected to opposite sides of the plug block, the plug block has a channel for the spring beads to retract inside, and limit holes are symmetrically opened on both sides of the plug, the limit holes matching the shape and size of the spring beads. When two mounting rods in a single drill hole are plugged in, the spring bead of one mounting rod engages with the limit hole of the other mounting rod. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a perspective view of the cutting elevation of the sampling method for large-size samples of rock mass or frozen soil in cold regions of mines according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the cutting elevation of the sampling method for large-size samples of mine rock mass or frozen soil in cold region mines according to an embodiment of the present invention. Figure 3 This is a perspective view of the cutting bottom surface of the sampling method for large-size samples of rock mass or frozen soil in cold regions of mines according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the cutting of the bottom surface in the method for sampling large-size samples of mine rock mass or frozen soil in cold region mines according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the reversing pulley according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first mounting rod according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the second mounting rod according to an embodiment of the present invention; Figure label: 1. Rock sample; 2. Diamond beaded rope; 3. Drill hole; 4. Reversing pulley; 401. Connecting block; 402. Frame; 403. Wheel body; 404. Sleeve; 5. Anchor rod; 6. First mounting rod; 601. Spring bead; 602. Insertion block; 603. Slot; 604. Socket; 7. Second mounting rod; 701. Limiting hole. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] The following describes a method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines, according to an embodiment of the present invention, with reference to the accompanying drawings.

[0022] like Figures 1-4 As shown in the figure, this invention proposes a method for sampling large-size samples from mine rock masses or frozen soil masses in cold-region mines, including the following steps: S1. Draw a cutting range on the free surface of the area to be sampled, and drill holes 3 at all vertices of the cutting range in a direction perpendicular to the free surface.

[0023] S2. Fix anchor rods 5 at the bottom of two adjacent boreholes 3 respectively.

[0024] S3. Take two reversing pulleys 4, and wrap the diamond beaded rope 2 between the two reversing pulleys 4. Use the mounting rod to insert the reversing pulley 4 into the drill hole 3 and detachably fix it to the top of each anchor rod 5. Adjust the angle of the reversing pulley 4 so that the direction of the rope exiting the reversing pulley 4 is the same as the direction to be cut, and the diamond beaded rope 2 between the two drill holes 3 is located at the position to be cut.

[0025] The reversing pulley 4 includes a connecting block 401, a wheel body 403, a frame 402, and a sleeve 404. The frame 402 has an internal cavity. The wheel body 403 is rotatably connected to both sides of the cavity. The width of the frame 402 is smaller than the diameter of the wheel body 403. The two sides of the wheel body 403 extend out of the frame 402. The connecting block 401 is fixedly connected to the top of the frame 402. The connecting block 401 is detachably connected to the mounting rod. The sleeve 404 is fixedly connected to the bottom of the frame 402. The sleeve 404 has an internal thread. The top of the anchor rod 5 has an external thread. The sleeve 404 and the top of the anchor rod 5 are connected by threads.

[0026] The bottom of the mounting rod is a polygonal socket 604. The shape of the connecting block 401 matches the socket 604. The connecting block 401 is inserted into the socket 604. After insertion, the mounting rod is rotated horizontally, which drives the reversing pulley 4 to rotate synchronously at the upper end of the anchor rod 5 to adjust the angle of the reversing pulley 4. The two mounting rods are detachably connected to each other in the length direction.

[0027] S4. Tighten the diamond beaded rope 2 and connect it to the wire saw. Start the wire saw. The diamond beaded rope 2 cuts the facade along the position to be cut. Repeat steps S2-S4 until all facades within the cutting range are cut.

[0028] S5. Using the mounting rod to adjust the angle of the two reversing pulleys 4, the diamond beaded rope 2 is horizontally wrapped around the rock sample 1 that has been vertically cut, and the mounting rod is inserted into the drill hole 3 to push the diamond beaded rope 2 to the bottom surface of the rock sample to be cut. The diamond beaded rope 2 is tightened and connected to the wire saw. All mounting rods are removed, the wire saw is started, and the diamond beaded rope 2 cuts along the bottom surface of the rock sample 1. After the cutting is completed, the rock sample 1 is taken out.

[0029] The method of this invention facilitates large-size sampling, with rock sample 1 reaching several meters in size. The process and required equipment are simple, suitable for open-pit mines and the confined spaces underground, applicable to preliminary exploration before normal mine production, and also applicable to mines that are shut down, unaffected by whether the mine is in normal production or not.

[0030] This invention employs a diamond beaded rope 2 to cut the rock, minimizing disturbance and damage to the rock sample 1. This method is suitable for rock strata with low strength or frozen soil in cold mining areas. The rock sample 1 retrieved on-site is relatively uniform in size, facilitating subsequent sample processing. This achieves precise, low-disturbance, and efficient cutting and sampling.

[0031] In this embodiment of the invention, by fixing the anchor rod to the bottom of the borehole 3 and then threading the reversing pulley 4 to the anchor rod 5, the reversing pulley 4 can provide more stable support force, avoiding deviation of the cutting trajectory due to the shaking of the reversing pulley 4 during the cutting process, thereby ensuring the regularity of the rock sample size. For materials with low strength and easy breakage, such as frozen soil in cold-region mines, this stable fixing method is particularly important, as it can effectively reduce the damage to the rock sample during sampling.

[0032] This invention, through the installation rod, facilitates the assembly and disassembly of the reversing pulley 4. Furthermore, the detachable connection allows for length adjustment, adapting to drill holes 3 of varying depths. The installation rod also ensures the diamond beaded rope 2 is positioned precisely on the bottom of the rock sample to be cut, facilitating rock sample cutting at various angles. The polygonal design of both the mounting rod's insertion port and the connecting block 401 of the reversing pulley 4 ensures a stable connection, preventing relative slippage during angle adjustment. Horizontal rotation of the installation rod drives the reversing pulley 4 to rotate synchronously, achieving precise adjustment of the rope's direction. This convenient and highly accurate operation effectively ensures the diamond beaded rope 2's cutting direction aligns with the preset direction.

[0033] Furthermore, the connecting block 401 has a rectangular structure, and the socket 604 is also rectangular in shape, matching the rectangular structure of the connecting block 401.

[0034] In some embodiments, in step S1, the cutting range is slightly larger than the cross-sectional area of ​​rock sample 1, and the depth of borehole 3 is slightly larger than the height of rock sample 1.

[0035] It should be noted that, since the edge of the extracted rock sample 1 was damaged by the drill hole 3, its sampling size needs to be slightly larger than the planned size of rock sample 1. After extraction, it can be ground to the required size.

[0036] In some embodiments, in step S3, the two mounting rods are first connected to the two reversing pulleys 4 respectively. The diamond beaded rope 2 is wound around the two side tracks of the reversing pulley 4 in the first drill hole 3. The diamond beaded rope 2 is temporarily fixed to the mounting rod connected to the reversing pulley 4 in the first drill hole 3 by a strap to prevent the diamond beaded rope 2 from falling off the reversing pulley 4. Then, the diamond beaded rope 2 is led out of the first drill hole 3 and wound around the two side tracks of the other reversing pulley 4. The other reversing pulley 4 is then installed in the other drill hole 3, and the angle of the two reversing pulleys 4 is adjusted. In step S4, after the two ends of the diamond beaded rope 2 are tightened, the strap breaks, the mounting rod is removed from the reversing pulley 4, and the mounting rod is taken out of the drill hole 3.

[0037] In some embodiments, in step S4, whether each facet of the rock sample 1 has been cut is determined based on the length of the diamond beaded rope 2 pulled out of the drill hole 3.

[0038] In some embodiments, when it is necessary to obtain rock sample 1 at a deep depth, steps S2-S5 are repeated several times to extract the outer rock section by section until rock sample 1 at the required depth is obtained.

[0039] In some embodiments, such as Figure 6 As shown, the side wall of the mounting rod has an arc-shaped groove 603, and the diamond beaded rope 2 is temporarily fixed to the groove 603 by a strap.

[0040] Furthermore, there are two slots 603 located on opposite sides of the mounting rod.

[0041] Furthermore, the straps can be Velcro straps or other straps that are easily cut by the diamond beaded cord 2.

[0042] Furthermore, the mounting rods include a first mounting rod 6 and a second mounting rod 7. The first mounting rod 6 is the first mounting rod used to install the reversing pulley 4 inside the drill hole 3, and the second mounting rod 7 is the other mounting rod besides the first mounting rod 6. The slot 603 is provided on the first mounting rod 6. This is because only the first mounting rod 6 needs to temporarily fix the diamond beaded rope 2 with a strap, while the other mounting rods do not need to temporarily fix the diamond beaded rope 2.

[0043] In some embodiments, such as Figure 6 As shown, a plug-in block 602 is fixedly connected to the top of the mounting rod. Several mounting rods are connected axially within a single drill hole 3. Adjacent mounting rods within a single drill hole 3 are connected end-to-end by interlocking. When the drill hole 3 is deep, multiple mounting rods can be connected end-to-end to disassemble or rotate the reversing pulley 4.

[0044] It should be noted that the mounting rod used to lift the diamond beaded rope 2 to the bottom surface of the rock sample to be cut is the same type of mounting rod used for disassembling and assembling the reversing pulley 4. That is, it can be either the first mounting rod 6 or the second mounting rod 7. If the drilled hole 3 is deep, multiple mounting rods can be interlocked to extend the length of the mounting rod. Other rods can also be used, as long as they can lift the diamond beaded rope 2 to the bottom surface of the rock sample to be cut.

[0045] In some embodiments, such as Figure 6 , Figure 7As shown, spring beads 601 are symmetrically connected to opposite sides of the plug block 602. The plug block 602 has a channel inside for the retraction of the spring beads 601. Limiting holes 701 are symmetrically opened on both sides of the socket 604. The shape and size of the limiting holes 701 match those of the spring beads 601. When two mounting rods in a single drill hole 3 are plugged in, the spring bead 601 of one mounting rod engages with the limiting hole 701 of the other mounting rod. This further prevents the two mounting rods from rotating relative to each other.

[0046] Furthermore, after the two mounting rods are interlocked, the spring beads 601 on both mounting rods are in the same position. The line connecting the centers of the spring beads 601 on the same side of the two mounting rods is parallel to the axis of the mounting rod and consistent with the rope output direction of the reversing pulley 4. When it is necessary to remove the reversing pulley 4, the insertion port 604 of the mounting rod can be aligned with the connecting block 401 of the reversing pulley 4 according to the orientation of the spring beads 601, which facilitates quick connection and also facilitates quick connection between the two mounting rods.

[0047] Furthermore, the limiting hole 701 is provided on the second mounting rod 7. The structural difference between the first mounting rod 6 and the second mounting rod 7 is that the first mounting rod 6 has a slot 603, while the second mounting rod 7 has a limiting hole 701. Apart from this, the other structures of the first mounting rod 6 and the second mounting rod 7 are the same, that is, both are provided with a spring bead 601, a plug block 602, and a socket 604.

[0048] The present invention will be further illustrated by specific embodiments below.

[0049] Example 1 The plan is to obtain a cuboid rock sample 1 from the free face of the sampling area. The cutting area will be demarcated, with vertices A, B, C, and D. The vertices inside the sampling area will be A', B', C', and D', with A, B, C, and D corresponding vertically to A', B', C', and D', respectively. That is, the top surface of rock sample 1 is ABCD, and the bottom surface is A'B'C'D'. The sampling steps are as follows: (a) Cut the first elevation AA'B'B of rock sample 1, as follows Figure 1 As shown: (1) Drill holes 3 are drilled at points A and B on the free surface respectively. The depth of the drill holes 3 exceeds the height of the rock sample 1. The diameter of the drill holes 3 is greater than the sum of the width of the reversing pulley 4 and twice the diameter of the diamond beaded rope 2. That is, the diameter of the drill holes 3 is sufficient to fit the reversing pulley 4 and the diamond beaded rope 2.

[0050] (2) Drill small holes at the bottom of the two holes 3 and install anchor rods 5. The top of the anchor rods 5 has external threads.

[0051] (3) Install reversing pulleys 4 in the two drilled holes 3 respectively, and insert the same diamond beaded rope 2. The specific steps are as follows: Connect the connecting block 401 at the top of the first reversing pulley 4 to the insertion port 604 of the first mounting rod (i.e., the first mounting rod 6). Wrap the diamond beaded rope 2 around the tracks on both sides of the first reversing pulley 4. Temporarily fix the diamond beaded rope 2 to the slot 603 of the mounting rod connected to the first reversing pulley 4 using straps, and tighten it to prevent the diamond beaded rope 2 from detaching from the track of the reversing pulley 4 during its lowering process. After connection, insert it into the drill hole 3. As it is gradually lowered, connect the mounting rods one by one, extending the length of the mounting rods by inserting them end-to-end, so that the uppermost mounting rod extends beyond the outside of the drill hole 3, facilitating operation of the mounting rods. Extend the diamond beaded rope 2, which is wrapped around both sides of the reversing pulley 4, outwards from the drill hole 3 until the reversing pulley 4 is lowered close to the anchor rod 5. By rotating the mounting rod, the sleeve 404 of the reversing pulley 4 is threadedly connected to the top of the anchor rod 5, and the direction and height of the rope exit position of the reversing pulley 4 are adjusted by the thread. Install the reversing pulleys 4 of adjacent drill holes 3 in the same way. The line connecting the rope exit positions of the two reversing pulleys 4 is parallel to the line connecting vertices A' and B', and is located slightly below the line connecting vertices A' and B'. The position can be judged by the distance the mounting rod extends out of the drill hole 3.

[0052] (4) Comb the diamond bead rope 2 so that its path is vertex A-vertex A'-vertex A-vertex B-vertex B'-vertex B. Apply tension to both ends of the diamond bead rope 2. The strap tied at the slot 603 breaks. Keep the diamond bead rope 2 in a taut state and connect it to the wire saw. Take out the mounting rods from the two drill holes 3.

[0053] (5) Start the wire saw and cut the AA'B'B surface of the rock sample 1 using the diamond beaded wire 2. Use the installation rod to drill a hole 3 at point B to remove the reversing pulley 4. The removal process is as follows: remove the diamond beaded wire 2 from the wire saw, insert the plug 604 at the bottom of the installation rod into the connecting block 401 at the top of the reversing pulley 4, rotate it in the opposite direction to separate the reversing pulley 4 from the anchor rod 5, and then pull the diamond beaded wire 2 upward together with the installation rod to remove the reversing pulley 4 from the drill hole 3.

[0054] (ii) Cutting of the remaining three facades: (6) Repeat steps (1)-(5) to complete the cutting of the three surfaces AA'D'D, CC'D'D, and BB'C'C of rock sample 1.

[0055] (iii) Cut the bottom surface A'B'C'D' of rock sample 1, as follows Figure 3 As shown: (7) After the last facade BB'C'C is cut, use the installation rod to go deep into the drill hole 3 to remove the reversing pulley 4 at the vertex C'.

[0056] (8) Remove the diamond beaded rope 2 from the wire saw, and wrap it horizontally around the rock sample 1 that has been vertically cut. Then, reinstall the removed reversing pulley 4 onto the anchor rod 5 at the apex C'. The installation method of the reversing pulley 4 is the same as described above. Use the installation rod to extend into the drill hole 3 and push the diamond beaded rope 2 to the bottom surface of the rock sample to be cut.

[0057] (9) Comb and tighten both ends of the diamond beaded rope 2, with the path being vertex B-vertex B'-vertex A'-vertex D'-vertex C'-vertex C. The two ends of the diamond beaded rope 2 are connected to the wire saw.

[0058] (10) Start the wire saw and cut the bottom surface A'B'C'D' of rock sample 1 through the diamond beaded rope 2.

[0059] (11) Use the mounting rod to penetrate the drill hole 3 and remove all the reversing pulleys 4.

[0060] (12) Take out rock sample 1 to complete the sampling. The size of the rock sample 1 taken out is slightly larger than the planned size. After taking it out, grind it to the required size.

[0061] In this invention, the term "some embodiments," etc., refers to specific features, structures, materials, or characteristics described in connection with that embodiment, which are included in at least one embodiment of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiments. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments. Moreover, those skilled in the art can combine and integrate the different embodiments described in this specification and the features of the different embodiments without contradiction.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for sampling large-size samples from rock masses in mines or frozen soil masses in cold-region mines, characterized in that, Includes the following steps: S1. Draw a cutting range on the free surface of the area to be sampled, and drill holes at all vertices of the cutting range in a direction perpendicular to the free surface. S2. Fix anchor bolts at the bottom of two adjacent boreholes respectively; S3. Take two reversing pulleys, wrap the diamond beaded rope between the two reversing pulleys, use the mounting rod to extend the reversing pulley into the drill hole and detachably fix it to the top of each anchor rod, adjust the angle of the reversing pulley so that the rope output direction of the reversing pulley is the same as the cutting direction, and the diamond beaded rope between the two drill holes is located at the cutting position. The reversing pulley includes a connecting block, a wheel body, a frame, and a sleeve. The frame has an internal cavity, and the wheel body is rotatably connected to both sides within the cavity. The width of the frame is smaller than the diameter of the wheel body, and both sides of the wheel body extend beyond the frame. The connecting block is fixedly connected to the top of the frame and is detachably connected to the mounting rod. The sleeve is fixedly connected to the bottom of the frame and has an internal thread. The top of the anchor rod has an external thread, and the sleeve and the top of the anchor rod are connected by threads. The bottom of the mounting rod is a polygonal socket, and the shape of the connecting block matches the socket. The connecting block is inserted into the socket. After insertion, the mounting rod is rotated horizontally, which drives the reversing pulley to rotate synchronously at the upper end of the anchor rod to adjust the angle of the reversing pulley. The two mounting rods are detachably connected to each other in the length direction. S4. Tighten the diamond beaded rope and connect it to the wire saw. Start the wire saw. The diamond beaded rope cuts the facade along the position to be cut. Repeat steps S2-S4 until all facades within the cutting range are cut. S5. Using the mounting rod to adjust the angle of the two reversing pulleys, the diamond beaded rope is horizontally routed around the rock sample that has been vertically cut. After the mounting rod is inserted into the drill hole, the diamond beaded rope is pushed to the bottom surface of the rock sample to be cut. The diamond beaded rope is tightened and connected to the wire saw. All the mounting rods are removed, the wire saw is started, and the diamond beaded rope cuts along the bottom surface of the rock sample. After cutting, the rock sample is removed.

2. The method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines according to claim 1, characterized in that, In step S1, the cutting range is slightly larger than the cross-sectional area of ​​the rock sample, and the drilling depth is slightly larger than the height of the rock sample.

3. The method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines according to claim 1, characterized in that, In step S3, the two mounting rods are first connected to the two reversing pulleys respectively. The diamond beaded rope is wound around the two side tracks of the reversing pulley in the first borehole. The diamond beaded rope is temporarily fixed to the mounting rod connected to the reversing pulley in the first borehole with a strap to prevent the diamond beaded rope from falling off the reversing pulley. Then, the diamond beaded rope is led out of the first borehole and wound around the two side tracks of the other reversing pulley. The other reversing pulley is then installed in the other borehole, and the angle of the two reversing pulleys is adjusted. In step S4, after the two ends of the diamond beaded rope are tightened, the strap breaks, the mounting rod is removed from the reversing pulley, and the mounting rod is taken out of the borehole.

4. The method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines according to claim 1, characterized in that, In step S4, whether each facet of the rock sample has been cut is determined by the length of the drill hole pulled out by the diamond beaded rope.

5. The method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines according to claim 1, characterized in that, When it is necessary to obtain rock samples from deep depths, repeat steps S2-S5 several times until rock samples at the required depth are obtained.

6. The method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines according to claim 3, characterized in that, The mounting rod has an arc-shaped groove on its side wall, and the diamond beaded cord is temporarily fixed in the groove by the strap.

7. The method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines according to claim 1, characterized in that, The top end of the mounting rod is fixedly connected to a plug-in block. Several mounting rods are connected axially in a single drill hole. Two adjacent mounting rods in a single drill hole are connected end to end by interlocking with each other.

8. The method for sampling large-size samples of mine rock mass or frozen soil in cold-region mines according to claim 7, characterized in that, Spring beads are symmetrically connected to opposite sides of the plug block. The plug block has a channel inside for the spring beads to retract. Limiting holes are symmetrically opened on both sides of the plug. The limiting holes match the shape and size of the spring beads. When two mounting rods in a single drill hole are plugged in, the spring bead of one mounting rod engages with the limiting hole of the other mounting rod.

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