A kind of open-pit coal mining with slope weak layer sampling device

Abstract

The present application relates to the technical field of coal mine slope sampling device, and disclose a kind of open-pit coal mining with slope weak layer sampling device, including drill rod and sampling cylinder: the inside top of the sampling cylinder is fixedly connected with fixed ring, the lower surface of the fixed ring is fixedly connected with L-shaped connecting block;The other end inside of the L-shaped connecting block is fixedly connected with inner cylinder, the sampling cylinder and inner cylinder form sample storage chamber, the outer surface of the sampling cylinder is provided with movable groove, the lower surface of the fixed ring is attached with movable pressing block, the inside of the movable pressing block is provided with notch.The kind of open-pit coal mining with slope weak layer sampling device, can effectively sample sample, and after sampling is completed, can avoid the condition that sample is separated from sampling device, guarantee the success rate of sampling, simultaneously after sampling, sample and sampling device can be quickly separated, without manual using the way of beating to collect sample, improve the efficiency of whole sampling process.

Description

Technical Field

[0001] This invention relates to the technical field of coal mine slope sampling devices, specifically a sampling device for weak layers of open-pit coal mine slopes. Background Technology

[0002] With the increasing demand for coal, major open-pit coal mines have accelerated their production pace to expand capacity. The earlier the end slopes are exposed, the more frequent the research on these slopes becomes. This process requires extensive slope surveys. Because the top and bottom of coal-bearing strata in open-pit coal mines often contain weak layers that are extremely detrimental to the slopes, the research on these weak layers has also intensified, increasing the workload of sampling. Sampling devices typically involve a drive assembly that propels a drill rod and sampling tube downwards into the area where samples are to be collected. The sampling tube then collects the samples. This type of sampling device is widely used, particularly in sampling weak-layer areas of open-pit coal mine slopes, thus facilitating slope surveys and research.

[0003] A search revealed that CN202122778195.0 provides a weak layer sampling device for open-pit coal mine slopes. The device is compatible with existing slope engineering survey equipment. During sampling, a vertical pressing method is used, which solves the problems of high difficulty and low success rate of existing weak layer sampling technology in slope engineering survey drilling weak layer sampling. This utility model has a simple structure, is easy to operate, and is easy to disassemble.

[0004] According to the literature, squeezing the sample into the sampling tube leaves the bottom of the tube unprotected, which can easily cause the sample to leak out, resulting in insufficient sampling and requiring multiple samplings, thus affecting the sampling process. After sampling, the sample needs to be manually removed from the sampling tube by tapping. This method can easily cause the sample to leak out in pieces, and the tapping process needs to be repeated multiple times. In addition, some samples may stick to the tube wall and need to be cleaned again before they can be used, which affects the sampling efficiency.

[0005] Therefore, it is necessary to propose a slope weak layer sampling device for open-pit coal mines. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a sampling device for weak layers of slopes in open-pit coal mines. This device has the advantages of preventing samples from leaking out of the sampling tube, facilitating the removal of samples from inside the sampling tube, and preventing samples from sticking to the tube wall, thus solving the problems mentioned in the background art.

[0007] This invention provides the following technical solution: a sampling device for weak layers in open-pit coal mine slopes, comprising a drill rod and a sampling cylinder:

[0008] A fixing ring is fixedly connected to the top of the inside of the sampling tube, and an L-shaped connecting block is fixedly connected to the lower surface of the fixing ring.

[0009] An inner cylinder is fixedly connected to the inner side of the other end of the L-shaped connecting block, forming a sample storage chamber between the sampling cylinder and the inner cylinder. A movable groove is formed on the outer surface of the sampling cylinder. A movable pressure block is attached to the lower surface of the fixed ring. A slot is formed on the inner side of the movable pressure block, and the inside of the slot is movably connected to the outer surface of the L-shaped connecting block. A side block is fixedly connected to the outer surface of the movable pressure block, and the outer surface of the side block is movably connected to the inside of the movable groove. A rotating rod is rotatably connected inside the sampling cylinder. The outer surface of the upper end of the rotating rod is rotatably sleeved with the inner side of the fixed ring. A conveying thread is fixedly connected to the outer surface of the rotating rod, and the edge of the conveying thread is... The inner wall of the inner cylinder is fitted together. A crushing ring is fixedly connected to the outer surface of the lower end of the rotating rod. A limit ring is threadedly connected to the outer surface of the lower end of the inner cylinder. A rotating round block is rotatably sleeved on the outer side of the limit ring. A limit long block is fixedly connected to the outer side of the rotating round block. The outer surface of the limit long block is movably connected to the inside of the movable groove. The upper end of the limit long block is fitted to the lower surface of the side block. A connector is threadedly connected to the lower end of the drill rod. A sampling cylinder is fitted to the lower end of the connector. A square butt joint is fixedly connected to the upper end of the rotating rod. A square butt groove is opened at the lower end of the connector. The outer surface of the square butt joint is inserted into the inside of the square butt groove.

[0010] Preferably, the lower end of the drill rod is provided with a connecting groove, and a collar is sleeved inside the connecting groove. The upper and lower surfaces of the collar are respectively fitted with the upper end of the connector and the top of the connecting groove. The lower end of the drill rod is rotatably sleeved with the connecting ring. A connecting wing plate is fixedly connected to the upper outer surface of the sampling cylinder. The connecting wing plate is provided with two sets of grooves. The connecting ring and the collar are provided with grooves. The grooves on the connecting wing plate correspond to the upper and lower positions of the grooves on the connecting ring and the collar, and the internal threads of the grooves are connected with mounting bolts.

[0011] Preferably, the side block has an insertion groove one on its outer side, the lower surface of the limiting ring has an insertion groove two, and the outer side of the limiting ring is in contact with the side wall of the sample storage chamber.

[0012] Preferably, the inner side of the movable pressure block is fitted with the side wall of the sample storage chamber, and the outer side of the movable pressure block is fitted with the other side wall of the sample storage chamber.

[0013] Preferably, four sets of L-shaped connecting blocks, limiting blocks, side blocks, and movable grooves are provided, and the four sets of L-shaped connecting blocks, limiting blocks, side blocks, and movable grooves are evenly distributed around the circumference of the sampling cylinder, with the distance between adjacent components being 90°.

[0014] Preferably, the connecting wing plates are provided in four sets, and the four sets of connecting wing plates are evenly distributed around the circumference of the sampling tube, and the distance between adjacent components is 90°.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This open-pit coal mine utilizes a slope weak layer sampling device. During sampling, the sampling cylinder enters the sampling position along with the drill rod. The drill rod drives the rotating rod inside the sampling cylinder to rotate, and the bottom of the rotating rod breaks up the sample from the target layer. The broken sample is then conveyed upwards along the rotating rod via a conveying thread until the rotating rod enters the sample storage chamber. After a certain amount is input, the drill rod drives the sampling cylinder away from the sampling position. At this point, the connection between the limiting ring and the inner cylinder is released. A tool is inserted into the insertion slot on the side block connected to the movable pressure block. By pressing down on the movable pressure block, the limiting block connected to the limiting ring moves downwards along the movable slot. Simultaneously, the sample inside the sample storage chamber is pushed out of the sample storage chamber for collection. This structure effectively collects samples and prevents the sample from detaching from the sampling device after sampling, ensuring a high success rate. Furthermore, it allows for rapid separation of the sample from the sampling device after sampling, eliminating the need for manual collection by tapping, thus improving the efficiency of the entire sampling process. It also removes adhering samples from the inner wall of the sample storage chamber.

[0017] This type of open-pit coal mine slope weak layer sampling device is installed by fitting a collar onto the outside of the connecting slot. The connector is installed at the lower end of the drill rod via a threaded connection to limit the collar. Then, the square butt joint connected to the upper end of the rotating rod inside the sampling cylinder is inserted into the square butt groove at the lower end of the connector. The inner side of the connecting wing plate connected to the outer edge of the sampling cylinder fits against the outside of the drill rod, connecting ring, connector, and collar. At the same time, the slots on the connecting wing plate correspond to the slots on the collar and connecting ring, and are installed with mounting bolts, thus completing the installation of the sampling cylinder. This structure can effectively install the sampling cylinder on the drill rod, and the installation method is simple and convenient, facilitating manual operation. It also ensures that the rotating rod can rotate normally with the drill rod through the connector, ensuring that the sampling device can perform sampling operations normally. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure between the sampling cylinder and the drill rod of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the sampling cylinder of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the upper half of the sampling cylinder of the present invention;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the lower half of the sampling cylinder of the present invention.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Drill pipe; 110. Connecting ring; 120. Connecting slot;

[0026] 2. Sampling cylinder; 210. Connecting wing plate; 211. Mounting bolt; 220. Square butt joint; 221. Rotating rod; 222. Conveying threaded wire; 223. Crushing ring cutter; 230. Movable pressure block; 231. Side block; 232. Insertion slot one; 240. Limiting ring; 241. Rotating round block; 242. Limiting long block; 243. Insertion slot two; 250. Movable slot; 260. Inner cylinder; 261. L-shaped connecting block; 270. Sample storage chamber; 280. Fixing ring;

[0027] 3. Connector; 310. Square mating groove;

[0028] 4. Ring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The stability of open-pit coal mine slopes directly affects the safety of mining operations. The weakest layer of the slope is a relatively weak part of the slope structure, and its geotechnical properties have a crucial impact on the overall stability of the slope. By sampling the weak layer, the physical and mechanical parameters of the weak layer, such as the internal friction angle, cohesion, and unit weight, can be accurately analyzed. These parameters are important bases for slope stability calculations and assessments. Using professional calculation models, such as the limit equilibrium method and numerical analysis, the stability state of the slope under different working conditions can be predicted, potential landslides and collapses can be detected in advance, and targeted reinforcement measures can be taken, such as slope reduction, retaining wall support, and drainage system optimization, effectively ensuring the safety of mining personnel and equipment.

[0031] Existing methods for sampling using drill rods and sampling tubes mostly involve squeezing the sample into the tube, leaving the bottom of the tube unprotected. This can easily cause the sample to leak out, resulting in insufficient sampling. Furthermore, after sampling, the sample needs to be manually removed from the tube by tapping. This method can easily cause the sample to leak out in small pieces, and the tapping process needs to be repeated multiple times.

[0032] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A sampling device for weak slope layers in open-pit coal mines includes a drill rod 1 and a sampling cylinder 2.

[0033] A fixing ring 280 is fixedly connected to the top of the inside of the sampling cylinder 2, and an L-shaped connecting block 261 is fixedly connected to the lower surface of the fixing ring 280.

[0034] An inner cylinder 260 is fixedly connected to the inner side of the other end of the L-shaped connecting block 261. A sample storage chamber 270 is formed between the sampling cylinder 2 and the inner cylinder 260. A movable groove 250 is opened on the outer surface of the sampling cylinder 2. A movable pressure block 230 is attached to the lower surface of the fixed ring 280. A slot is opened on the inner side of the movable pressure block 230, and the inside of the slot is movably connected to the outer surface of the L-shaped connecting block 261. A side block 231 is fixedly connected to the outer surface of the movable pressure block 230. The outer surface of the side block 231 is movably connected to the inside of the movable groove 250. A rotating rod 221 is rotatably connected inside the sampling cylinder 2. The outer surface of the upper end of the rotating rod 221 is rotatably sleeved with the inner side of the fixed ring 280. A conveying thread 222 is fixedly connected to the outer surface of the rotating rod 221. The edge of the conveying thread 222 is connected to the inner side of the fixed ring 280. The inner wall of the inner cylinder 260 is fitted together. A crushing ring cutter 223 is fixedly connected to the outer surface of the lower end of the rotating rod 221. A limit ring 240 is threadedly connected to the outer surface of the lower end of the inner cylinder 260. A rotating round block 241 is rotatably sleeved on the outer side of the limit ring 240. A limit long block 242 is fixedly connected to the outer side of the rotating round block 241. The outer surface of the limit long block 242 is movably connected to the inside of the movable groove 250. The upper end of the limit long block 242 is fitted together with the lower surface of the side block 231. A connector 3 is threadedly connected to the lower end of the drill rod 1. A sampling cylinder 2 is fitted together with the lower end of the connector 3. A square butt joint 220 is fixedly connected to the upper end of the rotating rod 221. A square butt groove 310 is opened at the lower end of the connector 3. The outer surface of the square butt joint 220 is inserted into the inside of the square butt groove 310.

[0035] During sampling, the sampling cylinder 2 enters the sampling position along with the drill rod 1. The drill rod 1 drives the rotating rod 221 inside the sampling cylinder 2 to rotate. The bottom of the rotating rod 221 breaks the sample in the target layer. The broken sample is then conveyed upward along the rotating rod 221 via the conveying thread 222 until the rotating rod 221 enters the sample storage chamber 270. After a certain amount is input, the drill rod 1 drives the sampling cylinder 2 to leave the sampling position. By pressing down the movable pressure block 230, the limiting block 242 connected to the limiting ring 240 moves downward along the movable groove 250. At the same time, the sample inside the sample storage chamber 270 is pushed out of the sample storage chamber 270 and can be collected.

[0036] As a preferred embodiment of the present invention, the lower end of the drill rod 1 is provided with a connecting slot 120, and a collar 4 is sleeved inside the connecting slot 120. The upper and lower surfaces of the collar 4 are respectively fitted to the upper end of the connector 3 and the top of the connecting slot 120. The lower end of the drill rod 1 is rotatably sleeved with a connecting ring 110. The upper outer surface of the sampling cylinder 2 is fixedly connected with a connecting wing plate 210. Two sets of slots are provided on the connecting wing plate 210. The connecting ring 110 and the collar 4 are provided with slots. The slots on the connecting wing plate 210 correspond to the upper and lower positions of the slots on the connecting ring 110 and the collar 4. The internal threads of the slots are connected with mounting bolts 211.

[0037] When installing the whole device, the sampling cylinder 2 is first assembled by sliding the movable pressure block 230 into the sample storage chamber 270. At this time, the side block 231 connected to the outside of the movable pressure block 230 slides inside the movable groove 250 until the upper surface of the movable pressure block 230 is in contact with the lower surface of the fixed ring 280. Then, the limiting ring 240 is threaded to the lower outer surface of the inner cylinder 260 to block the lower opening of the sample storage chamber 270. The outer surface of the limiting ring 240 is connected to the limiting long block 242 connected to the rotating round block 241 inside the movable groove 250. The upper end of the movable groove 250 abuts against the lower surface of the side block 231. At this time, the assembly of the internal structure of the sampling cylinder 2 is completed.

[0038] When the sampling cylinder 2 is installed on the drill rod 1, the collar 4 is fitted onto the outside of the connecting groove 120. The connector 3 is installed at the lower end of the drill rod 1 by means of threaded connection to limit the collar 4. Then, the square butt joint 220 connected to the upper end of the rotating rod 221 set in the sampling cylinder 2 is inserted into the inside of the square butt groove 310 opened at the lower end of the connector 3. The inner side of the connecting wing plate 210 connected to the outer edge of the sampling cylinder 2 is attached to the outside of the drill rod 1, the connecting ring 110, the connector 3 and the collar 4. At the same time, the groove opened on the connecting wing plate 210 corresponds to the groove opened on the collar 4 and the connecting ring 110. The sampling cylinder 2 is installed by means of the mounting bolt 211, thereby completing the installation of the sampling cylinder 2.

[0039] As a preferred technical solution of the present invention, the side block 231 has an insertion groove 232 on its outer side, and the lower surface of the limiting ring 240 has an insertion groove 243. The outer side of the limiting ring 240 is in contact with the side wall of the sample storage chamber 270.

[0040] Insertion slot 232 facilitates the connection of external instruments to the interior of side block 231, thereby using external instruments to push movable pressure block 230 downward to collect samples inside sample storage chamber 270. Insertion slot 243 also contacts external instruments to connect with limiting ring 240, used for installing or removing limiting ring 240.

[0041] Furthermore, external instruments can include both rods and blocks, and can be used as auxiliary instruments.

[0042] As a preferred embodiment of the present invention, the inner side of the movable pressure block 230 is fitted with the side wall of the sample storage chamber 270, and the outer side of the movable pressure block 230 is fitted with the other side wall of the sample storage chamber 270.

[0043] As a preferred technical solution of the present invention, four sets of L-shaped connecting blocks 261, limiting blocks 242, side blocks 231 and movable grooves 250 are provided, and the four sets of L-shaped connecting blocks 261, limiting blocks 242, side blocks 231 and movable grooves 250 are evenly distributed around the sampling cylinder 2, and the distance between adjacent components is 90°.

[0044] As a preferred technical solution of the present invention, four sets of connecting wing plates 210 are provided, and the four sets of connecting wing plates 210 are evenly distributed around the circumference of the sampling cylinder 2, and the distance between adjacent components is 90°.

[0045] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampling device for weak layers of open-pit coal mine slopes, comprising a drill rod (1) and a sampling tube (2), characterized in that: A fixing ring (280) is fixedly connected to the top of the inside of the sampling tube (2), and an L-shaped connecting block (261) is fixedly connected to the lower surface of the fixing ring (280). The inner cylinder (260) is fixedly connected to the inner side of the other end of the L-shaped connecting block (261). A sample storage chamber (270) is formed between the sampling cylinder (2) and the inner cylinder (260). A movable groove (250) is opened on the outer surface of the sampling cylinder (2). A movable pressure block (230) is attached to the lower surface of the fixing ring (280). A slot is opened on the inner side of the movable pressure block (230), and the inside of the slot is movably connected to the outer surface of the L-shaped connecting block (261). A side block (231) is fixedly connected to the outer surface of the pressure block (230). The outer surface of the side block (231) is movably connected to the interior of the movable groove (250). A rotating rod (221) is rotatably connected to the interior of the sampling cylinder (2). The outer surface of the upper end of the rotating rod (221) is rotatably sleeved with the inner side of the fixed ring (280). A conveying thread (222) is fixedly connected to the outer surface of the rotating rod (221). The edge of the conveying thread (222) is connected to the inner side of the fixed ring (280). The inner wall of the cylinder (260) is fitted together. A crushing ring cutter (223) is fixedly connected to the lower outer surface of the rotating rod (221). A limit ring (240) is threadedly connected to the lower outer surface of the inner cylinder (260). A rotating round block (241) is rotatably sleeved on the outer side of the limit ring (240). A limit block (242) is fixedly connected to the outer side of the rotating round block (241). The outer surface of the limit block (242) is movably connected to the interior of the movable groove (250). The upper end of the limiting block (242) is attached to the lower surface of the side block (231). The lower end of the drill rod (1) is internally threaded with a connector (3). The lower end of the connector (3) is attached to a sampling cylinder (2). The upper end of the rotating rod (221) is fixedly connected with a square butt joint (220). The lower end of the connector (3) is provided with a square butt groove (310). The outer surface of the square butt joint (220) is inserted into the inside of the square butt groove (310).

2. The open-pit coal mine slope weak layer sampling device according to claim 1, characterized in that: The lower end of the drill rod (1) is provided with a connecting slot (120). A collar (4) is sleeved inside the connecting slot (120). The upper and lower surfaces of the collar (4) are respectively attached to the upper end of the connector (3) and the top of the connecting slot (120). The lower end of the drill rod (1) is rotatably sleeved with a connecting ring (110). A connecting wing plate (210) is fixedly connected to the upper outer surface of the sampling cylinder (2). Two sets of slots are provided on the connecting wing plate (210). Slots are provided on the connecting ring (110) and the collar (4). The slots on the connecting wing plate (210) correspond to the upper and lower positions of the slots on the connecting ring (110) and the collar (4). The internal threads of the slots are connected with mounting bolts (211).

3. The open-pit coal mine slope weak layer sampling device according to claim 1, characterized in that: The side block (231) has an insertion groove 1 (232) on its outer side, and the lower surface of the limiting ring (240) has an insertion groove 2 (243). The outer side of the limiting ring (240) is in contact with the side wall of the sample storage chamber (270).

4. The open-pit coal mine slope weak layer sampling device according to claim 1, characterized in that: The inner side of the movable pressure block (230) is attached to the side wall of the sample storage chamber (270), and the outer side of the movable pressure block (230) is attached to the other side wall of the sample storage chamber (270).

5. A slope weak layer sampling device for open-pit coal mines according to claim 1, characterized in that: The L-shaped connecting block (261), the limiting long block (242), the side block (231) and the movable groove (250) are all provided in four sets, and the four sets of L-shaped connecting blocks (261), limiting long blocks (242), side blocks (231) and movable grooves (250) are evenly distributed around the sampling tube (2), and the distance between adjacent components is 90°.

6. A slope weak layer sampling device for open-pit coal mines according to claim 2, characterized in that: The connecting wing plate (210) is provided in four sets, and the four sets of connecting wing plates (210) are evenly distributed around the sampling tube (2) and the distance between adjacent components is 90°.

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