Slope weak layer sampling device for open pit coal mine exploitation

Abstract

The invention relates to the technical field of coal mine slope sampling devices, and discloses a slope weak layer sampling device for open pit coal mining, the slope weak layer sampling device comprises a drill rod and a sampling barrel, the top of the inner part of the sampling barrel is fixedly connected with a fixing ring, and the lower surface of the fixing ring is fixedly connected with an L-shaped connecting block; an inner cylinder is fixedly connected to the inner side of the other end of the L-shaped connecting block, a sample storage chamber is formed between the sampling cylinder and the inner cylinder, a movable groove is formed in the outer surface of the sampling cylinder, a movable pressing block is attached to the lower surface of the fixing ring, and a notch is formed in the inner side of the movable pressing block. The side slope weak layer sampling device for open pit coal mining can effectively sample a sample, can avoid the situation that the sample is separated from the sampling device after sampling is completed, guarantees the success rate of sampling, can quickly separate the sample from the sampling device after sampling, does not need to manually collect the sample in a beating mode, and is convenient to use. The efficiency of the whole sampling process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine slope sampling device, in particular to a slope weak layer sampling device for open-pit coal mining. BACKGROUND

[0002] With the demand for coal mines, major open-pit coal mines expand production capacity, so the production process of open-pit coal mines speeds up, the time of end slope exposure is earlier, and the research work on the end slope is more frequent. A large amount of slope survey work is needed in this process. Because the top and bottom plate of the coal-bearing stratum in the open-pit coal mine often has a weak layer that is extremely detrimental to the slope, the research work on the weak layer is also increased, and the sampling work of the weak layer is improved. The sampling device usually drives the drill rod and the sampling cylinder to go down to the area where the sample is taken, and then uses the sampling cylinder to collect the sample. This form of sampling device is widely used, and it is also commonly used in the weak layer area sampling work of the open-pit coal mine slope, which provides convenience for the survey and research work of the slope.

[0003] According to the search, CN202122778195.0 provides an open-pit coal mine slope weak layer sampling device. The device matches the existing slope engineering survey equipment. When sampling, the device uses a vertical pressure method to solve the problems of high difficulty and low success rate of the existing weak layer sampling technology in the slope engineering survey drilling weak layer sampling. The device has the advantages of simple structure, convenient operation, and easy disassembly.

[0004] According to the literature, the sample may leak out of the sampling cylinder by extruding into the sampling cylinder, which may not be sufficient for sampling, and may require multiple sampling, affecting the sampling process. After sampling, the sample needs to be knocked out of the sampling cylinder by artificial knocking, which may cause the sample to leak out of the sampling cylinder, and the knocking process needs to be repeated multiple times. In addition, some samples may adhere to the cylinder wall and need to be cleaned again before use, which affects the sampling efficiency.

[0005] Therefore, it is necessary to provide a slope weak layer sampling device for open-pit coal mining. SUMMARY

[0006] In view of the shortcomings of the prior art, the present application provides a slope weak layer sampling device for open-pit coal mining, which can avoid the leakage of samples from the sampling cylinder, facilitate the removal of samples from the sampling cylinder, and avoid the adhesion of samples to the cylinder wall, thereby solving the problems in the background art.

[0007] The present application provides the following technical scheme: a slope weak layer sampling device for open-pit coal mining, comprising a drill rod and a sampling cylinder: A fixing ring is fixedly connected to the top of the sampling cylinder, and an L-shaped connecting block is fixedly connected to the lower surface of the fixing ring; The other end of the L-shaped connecting block is fixedly connected to the inner cylinder on the inner side, and a sample storage chamber is formed between the sampling cylinder and the inner cylinder, and a movable groove is provided on the outer surface of the sampling cylinder, and a movable pressure block is fitted on the lower surface of the fixed ring. A notch is provided on the inner side of the movable pressure block, and the inside of the notch is movably connected to the outer surface of the L-shaped connecting block, and the outer surface of the movable pressure block is fixedly connected to the side block, and the outer surface of the side block is movably connected to the inside of the movable groove. The interior of the sampling cylinder is rotatably connected to a rotating rod, and the outer surface of the upper end of the rotating rod is rotatably sleeved on the inner side of the fixed ring. The outer surface of the rotating rod is fixedly connected to a conveying thread, and the edge of the conveying thread fits against the inner wall of the inner cylinder, and the outer surface of the lower end of the rotating rod is fixedly connected to a crushing ring cutter.

[0008] Preferably, the outer surface of the lower end of the inner cylinder is threadedly connected to a limiting ring, and a rotating round block is rotatably sleeved on the outer side of the limiting ring. The outer side of the rotating round block is fixedly connected to a limiting length block, and the outer surface of the limiting length block is movably connected to the inner part of the movable groove, and the upper end of the limiting length block is fitted with the lower surface of the side block.

[0009] Preferably, the lower end of the drill rod is internally threaded with a connector, the lower end of the connector is fitted with a sampling tube, the upper end of the rotating rod is fixedly connected to a square docking joint, the lower end of the connector is provided with a square docking groove, and the outer surface of the square docking joint is plugged into the interior of the square docking groove.

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

[0011] Preferably, an insertion groove 1 is provided on the outer side of the side block, an insertion groove 2 is provided on the lower surface of the limiting ring, 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 pressing block is in contact with a side wall of the sample storage chamber, and the outer side of the movable pressing block is in contact with the other side wall of the sample storage chamber.

[0013] Preferably, the L-shaped connecting blocks, limiting long blocks, side blocks and movable grooves are each provided in four groups, and the four groups of L-shaped connecting blocks, limiting long blocks, side blocks and movable grooves are evenly distributed around the circumference of the sampling tube, and the spacing between adjacent components is 90°.

[0014] Preferably, the connecting wing plates are provided in four groups, and the four groups of connecting wing plates are uniformly distributed in the circumferential direction of the sampling cylinder, and the adjacent groups are spaced apart by 90 degrees.

[0015] Compared with the prior art, the present application has the following beneficial effects: The open-pit coal mining slope weak layer sampling device, when sampling, the sampling cylinder enters the sampling position with the drill rod, the rotating rod inside the sampling cylinder is driven by the drill rod to rotate, the bottom of the rotating rod crushes the target layer sample, the crushed sample is conveyed upward along the rotating rod through the conveying screw thread, until the rotating rod enters the inside of the sample storage chamber, after a certain amount is input, the drill rod drives the sampling cylinder to leave the sampling position, at this time, the connection between the limiting ring and the inner cylinder is released, the side block connected to the side edge of the movable pressing block is inserted into the insertion slot one opened in the side block, the movable pressing block is pressed downward, the limiting long block connected to the limiting ring is pushed to move downward along the movable slot, at the same time, the sample inside the sample storage chamber is pushed out of the inside of the sample storage chamber, which can be collected. The structure can effectively sample the sample, and after sampling is completed, the sample can be prevented from separating from the sampling device, the success rate of sampling is ensured, and after sampling, the sample and the sampling device can be quickly separated, manual knocking is not required for sample collection, the efficiency of the entire sampling process is improved, and the adhered sample on the inner wall of the sample storage chamber is scraped off.

[0016] The open-pit coal mining slope weak layer sampling device, when installing, the sleeve ring is sleeved outside the connecting slot, the connecting head is installed at the lower end of the drill rod in a threaded connection manner, the sleeve ring is limited, the square butt joint connected to the upper end of the rotating rod arranged in the sampling cylinder is inserted into the square butt joint slot opened at the lower end of the connecting head, the inner side of the connecting wing plate connected to the outer side of the sampling cylinder is attached to the outside of the drill rod, the connecting ring, the connecting head and the sleeve ring, at the same time, the slot opened on the connecting wing plate corresponds to the slots opened on the sleeve ring and the connecting ring, and is installed through the installation bolts, so that the installation of the sampling cylinder is completed. The structure can effectively install the sampling cylinder on the drill rod, the installation method is simple and convenient, manual operation is facilitated, the rotating rod can be normally rotated with the drill rod through the connecting head, and the sampling device can normally sample. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used for the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0018] Figure 1It is the whole structure schematic diagram of the device of the present application; Figure 2 It is the connecting structure schematic diagram of the sampling cylinder and the drill pipe of the present application; Figure 3 It is the internal structure schematic diagram of the sampling cylinder of the present application; Figure 4 It is the upper half part cross section structure schematic diagram of the sampling cylinder of the present application; Figure 5 It is the lower half part cross section structure schematic diagram of the sampling cylinder of the present application.

[0019] In the drawing, the component list represented by each mark is as follows: 1, drill pipe; 110, connecting ring; 120, connecting notch; 2, sampling cylinder; 210, connecting wing plate; 211, mounting bolt; 220, square butt joint; 221, rotating rod; 222, conveying thread; 223, crushing ring knife; 230, movable pressing block; 231, side block; 232, insertion groove one; 240, limiting ring; 241, rotating round block; 242, limiting long block; 243, insertion groove two; 250, movable groove; 260, inner cylinder; 261, L-shaped connecting block; 270, sample storage chamber; 280, fixed ring; 3, connecting head; 310, square butt joint groove; 4, sleeve ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] The stability of the open-pit coal mine slope directly relates to whether the mining operation can be safely carried out. The weak layer of the slope is the relatively weak part in the slope structure, and the geotechnical mechanics properties thereof have a key influence on the overall stability of the slope. By sampling the weak layer of the slope, the physical and mechanical parameters of the weak layer, such as the internal friction angle, the cohesion, the bulk density, etc., can be accurately analyzed. These parameters are important basis for the calculation and evaluation of the slope stability. With the aid of professional calculation models, such as the limit equilibrium method, the numerical analysis method, etc., the stability state of the slope under different working conditions can be predicted, and potential landslides, collapses and other safety hazards can be found in advance, so that targeted reinforcement measures, such as slope cutting and load reduction, soil retaining wall support, drainage system optimization, etc., can be taken to effectively protect the safety of the mining personnel and equipment.

[0022] The existing sampling by means of a drill rod and a sampling cylinder is mostly through extrusion to make the sample enter the inside of the sampling cylinder, which causes the bottom of the sampling cylinder to be in an unprotected state, and the sample is easy to leak out of the sampling cylinder, so that the sampling is not sufficient. After sampling, the sample needs to be taken out from the sampling cylinder by artificial knocking, which is easy to cause the sample to leak out of the sampling cylinder, and the knocking process needs to be repeated many times.

[0023] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , a kind of open-pit coal mining with slope weak layer sampling device, including drill rod 1 and sampling cylinder 2: The inside top of sampling cylinder 2 is fixedly connected with fixed ring 280, and the lower surface of fixed ring 280 is fixedly connected with L-shaped connecting block 261; The other end of L-shaped connecting block 261 is fixedly connected with inner cylinder 260, and sampling cylinder 2 and inner cylinder 260 form sample storage chamber 270, and the outer surface of sampling cylinder 2 is provided with movable groove 250, the lower surface of fixed ring 280 is attached with movable pressing block 230, the inner side of movable pressing block 230 is provided with notch, and the inside of notch is movably connected with the outer surface of L-shaped connecting block 261, the outer surface of movable pressing block 230 is fixedly connected with side block 231, the outer surface of side block 231 is movably connected with the inside of movable groove 250, the inside of sampling cylinder 2 is rotatably connected with rotating rod 221, the upper end of rotating rod 221 is rotatably sleeved with the inner side of fixed ring 280, the outer surface of rotating rod 221 is fixedly connected with conveying thread 222, the edge of conveying thread 222 is attached with the inner wall of inner cylinder 260, and the lower end of rotating rod 221 is fixedly connected with broken ring cutter 223.

[0024] When sampling, sampling cylinder 2 enters the sampling position with drill rod 1, rotating rod 221 in the inside of sampling cylinder 2 is driven to rotate by drill rod 1, the bottom of rotating rod 221 breaks the sample of target layer, the broken sample is conveyed upwards along rotating rod 221 by conveying thread 222, until rotating rod 221 enters the inside of sample storage chamber 270, after inputting a certain amount, drill rod 1 drives sampling cylinder 2 to leave the sampling position, by pressing movable pressing block 230 downwards, limit long block 242 connected with limit ring 240 moves downwards along movable groove 250, and the sample in the inside of sample storage chamber 270 is pushed out of the inside of sample storage chamber 270, which can be collected.

[0025] As a preferred technical scheme of the present application, the lower end outer surface of the inner cylinder 260 is threadedly connected with a limiting ring 240, the outer side of the limiting ring 240 is rotatably sleeved with a rotating circular block 241, the outer side of the rotating circular block 241 is fixedly connected with a limiting long block 242, the outer surface of the limiting long block 242 is movably connected with the inner part of the movable groove 250, the upper end of the limiting long block 242 is attached to the lower surface of the side block 231, the lower end of the drill rod 1 is threadedly connected with a connecting head 3, the lower end of the connecting head 3 is attached with 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 connecting head 3 is provided with a square butt joint groove 310, the outer surface of the square butt joint 220 is inserted into the square butt joint groove 310, the lower end of the drill rod 1 is provided with a connecting slot 120, the inner part of the connecting slot 120 is sleeved with a sleeve ring 4, the upper and lower surfaces of the sleeve ring 4 are respectively attached to the upper end of the connecting head 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 outer surface of the upper end of the sampling cylinder 2 is fixedly connected with a connecting wing plate 210, two groups of grooves are provided on the connecting wing plate 210, grooves are provided on the connecting ring 110 and the sleeve ring 4, the grooves provided on the connecting wing plate 210 correspond to the upper and lower positions of the grooves on the connecting ring 110 and the sleeve ring 4, and the inner part of the grooves is threadedly connected with mounting bolts 211.

[0026] When the whole device is installed, first, the sampling cylinder 2 is assembled, the movable pressing block 230 is slid into the inner part of the sample storage chamber 270, at this time, the side block 231 connected to the outer side of the movable pressing block 230 slides in the inner part of the movable groove 250 until the upper surface of the movable pressing block 230 is attached to the lower surface of the fixed ring 280, then the limiting ring 240 is threadedly connected to the lower end outer surface of the inner cylinder 260 to block the lower end opening of the sample storage chamber 270, and the outer surface of the limiting ring 240 is connected to the inner part of the movable groove 250 through the limiting long block 242 connected by the rotating circular block 241, the upper end of the movable groove 250 is abutted to the lower surface of the side block 231, at this time, the assembly of the internal structure of the sampling cylinder 2 is completed; When the sampling cylinder 2 is installed on the drill rod 1, the sleeve ring 4 is sleeved on the outer side of the connecting slot 120, the connecting head 3 is installed on the lower end of the drill rod 1 by thread connection, the sleeve ring 4 is limited, then the square butt joint 220 connected to the upper end of the rotating rod 221 provided in the sampling cylinder 2 is inserted into the inner part of the square butt joint groove 310 provided at the lower end of the connecting head 3, the inner side of the connecting wing plate 210 connected to the outer side of the sampling cylinder 2 is attached to the outer part of the drill rod 1, the connecting ring 110, the connecting head 3 and the sleeve ring 4, at the same time, the grooves provided on the connecting wing plate 210 correspond to the grooves provided on the sleeve ring 4 and the connecting ring 110, and are installed by the mounting bolts 211, thereby completing the installation of the sampling cylinder 2.

[0027] The outer side of the side block 231 is provided with an insertion groove one 232, the lower surface of the limiting ring 240 is provided with an insertion groove two 243, and the outer side of the limiting ring 240 is attached to the side wall of the sample storage chamber 270.

[0028] The insertion groove one 232 facilitates the connection between the external instrument and the inside of the side block 231, so as to push the movable pressing block 230 downward by means of the external instrument, and realize the collection of the sample in the sample storage chamber 270. Further, the external instrument can be a plug rod or a plug block, which is used as an auxiliary instrument.

[0029] As a preferred technical solution of the present application, the inner side of the movable pressing block 230 is attached to the side wall of the sample storage chamber 270, and the outer side of the movable pressing block 230 is attached to the other side wall of the sample storage chamber 270.

[0030] As a preferred technical solution of the present application, the L-shaped connecting block 261, the limiting long block 242, the side block 231 and the movable groove 250 are provided with four groups, and the four groups of the L-shaped connecting block 261, the limiting long block 242, the side block 231 and the movable groove 250 are uniformly distributed in the circumferential direction of the sampling cylinder 2, and the spacing between adjacent components is 90°.

[0031] As a preferred technical solution of the present application, the connecting wing plate 210 is provided with four groups, and the four groups of the connecting wing plate 210 are uniformly distributed in the circumferential direction of the sampling cylinder 2, and the spacing between adjacent components is 90°.

[0032] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "threading" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specified, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application according to the specific situation.

[0034] While embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for sampling weak layers of slopes in open-pit coal mines, comprising a drill rod (1) and a sampling tube (2), characterized in that: A fixing ring (280) is fixedly connected to the inner top of the sampling cylinder (2), and an L-shaped connecting block (261) is fixedly connected to the lower surface of the fixing ring (280); The inner side of the other end of the L-shaped connecting block (261) is fixedly connected to the inner cylinder (260), and a sample storage chamber (270) is formed between the sampling cylinder (2) and the inner cylinder (260). The outer surface of the sampling cylinder (2) is provided with a movable groove (250), and the lower surface of the fixing ring (280) is fitted with a movable pressure block (230). The inner side of the movable pressure block (230) is provided with a notch, and the interior of the notch is movably connected to the outer surface of the L-shaped connecting block (261). The outer surface of the movable pressure block (230) is fixedly connected to the side block (230). 1), the outer surface of the side block (231) is movably connected to the inside of the movable groove (250), the inner part of the sampling tube (2) is rotatably connected to a rotating rod (221), the upper end outer surface of the rotating rod (221) is rotatably sleeved with the inner side of the fixed ring (280), the outer surface of the rotating rod (221) is fixedly connected to a conveying thread line (222), the edge portion of the conveying thread line (222) is in contact with the inner wall of the inner tube (260), and the lower end outer surface of the rotating rod (221) is fixedly connected to a crushing ring cutter (223).

2. The device for sampling weak layers of slopes used in open-pit coal mining according to claim 1, characterized in that: The outer surface of the lower end of the inner cylinder (260) is threadedly connected to a limit ring (240), the outer side of the limit ring (240) is rotatably sleeved with a rotating circular block (241), the outer side of the rotating circular block (241) is fixedly connected to a limit length block (242), the outer surface of the limit length block (242) is movably connected to the inside of the movable groove (250), and the upper end of the limit length block (242) is in contact with the lower surface of the side block (231).

3. The device for sampling weak layers of slopes used in open-pit coal mining according to claim 1, characterized in that: The lower end of the drill rod (1) is internally threadedly connected to a connector (3), the lower end of the connector (3) is fitted with a sampling tube (2), the upper end of the rotating rod (221) is fixedly connected to a square butt joint (220), the lower end of the connector (3) is provided with a square butt joint (310), and the outer surface of the square butt joint (220) is plugged into the interior of the square butt joint (310).

4. The device for sampling weak layers of slopes used in open-pit coal mining according to claim 1, characterized in that: The lower end of the drill rod (1) is provided with a connecting notch (120), the interior of the connecting notch (120) is sleeved with a collar (4), the upper and lower surfaces of the collar (4) are respectively fitted with the upper end of the connector (3) and the top of the connecting notch (120), the lower end of the drill rod (1) is rotatably sleeved with a connecting ring (110), the upper end outer surface of the sampling tube (2) is fixedly connected with a connecting wing plate (210), two groups of notches are provided on the connecting wing plate (210), the connecting ring (110) and the collar (4) are provided with notches, the notches provided on the connecting wing plate (210) correspond to the upper and lower positions of the notches on the connecting ring (110) and the collar (4), and the internal threads of the notches are connected with mounting bolts (211).

5. The device for sampling weak layers of slopes used in open-pit coal mining according to claim 2, characterized in that: An insertion groove 1 (232) is provided on the outer side of the side block (231), an insertion groove 2 (243) is provided on the lower surface of the limiting ring (240), and the outer side of the limiting ring (240) is in contact with the side wall of the sample storage chamber (270).

6. The device for sampling weak layers of slopes used in open-pit coal mining according to claim 1, characterized in that: The inner side of the movable pressing block (230) is in contact with a side wall of the sample storage chamber (270), and the outer side of the movable pressing block (230) is in contact with the other side wall of the sample storage chamber (270).

7. The device for sampling weak layers of slopes used in open-pit coal mining according to claim 1, characterized in that: The L-shaped connecting block (261), the position-limiting long block (242), the side block (231) and the movable groove (250) are each provided in four groups, and the four groups of L-shaped connecting blocks (261), the position-limiting long block (242), the side block (231) and the movable groove (250) are evenly distributed in the circumferential direction of the sampling tube (2), and the spacing between adjacent components is 90 degrees.

8. The device for sampling weak layers of slopes used in open-pit coal mining according to claim 4, characterized in that: Four groups of connecting wing plates (210) are provided, and the four groups of connecting wing plates (210) are evenly distributed in the circumferential direction of the sampling barrel (2), and the spacing between adjacent components is 90 degrees.

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