Sampling detection device and detection method for fluorite mine exploration

Abstract

The invention discloses a sampling detection device for fluorite mine exploration and a detection method, and belongs to the technical field of mineral resource exploration. The device comprises a vertical frame, a drilling mechanism, a sample accommodating mechanism, a stratified sampling mechanism, a spraying mechanism and a central control system. A liftable sorting cylinder is coaxially sleeved with a hollow drill rod of the drilling mechanism, and an annular base of the stratified sampling mechanism is fixed to the inner wall of the drill rod and provided with a circumferential cutting piece. A lithologic interface is identified while drilling through a sensor in a sorting cylinder, when drilling is suspended, a cutting piece is controlled to stretch out to horizontally cut a rock core in situ, and a sample section is supported and carried by the sorting cylinder to ascend. In-situ spraying solidification can be carried out through an atomizing nozzle aiming at a broken rock core. And the central control system intelligently selects a standard cutting mode, a cutting mode after solidification or a rock debris collecting mode according to a rock core integrity evaluation result. According to the invention, in-situ precise stratified sampling and sample protection according to a real geological interface are realized, and the problem that a mixed sample and a sample are easy to damage is fundamentally solved.

Description

Technical Field

[0001] This invention belongs to the technical field of mineral resource exploration equipment, specifically relating to a sampling and testing device and method for fluorite mineral exploration. Background Technology

[0002] Fluorite, as an important strategic non-metallic mineral resource, often exhibits significant heterogeneity in its spatial distribution. Specifically, its grade (CaF2 content) varies dramatically both vertically and laterally, and it frequently coexists or interbeddes with gangue minerals such as quartz, calcite, and barite. Therefore, obtaining geological samples that accurately reflect the internal structure, mineral composition, and grade variation patterns of the ore body is fundamental for accurate resource evaluation, ore body delineation, and reserve estimation during the mineral exploration phase. Currently, sampling operations in fluorite exploration primarily rely on traditional core drilling techniques.

[0003] Fluorite ore bodies are highly heterogeneous, with grades varying dramatically in the vertical direction, and often interbedded thinly with gangue minerals. Existing core drilling techniques have fundamental flaws in obtaining representative samples, with the core problem being the inability to perform in-situ, precise physical stratification based on actual geological boundaries during drilling.

[0004] Specifically, the current technology employs a "whole-scale drilling – whole-scale coring – surface manual segmentation" operation mode. This mode leads to two insurmountable problems: First, when long cores are manually broken or cut after drilling, the segmentation points cannot match the actual lithology and mineralization interfaces downhole, resulting in individual samples containing materials from different geological units, becoming "mixed samples." This severely obscures the true grade gradient of the ore body, causing systematic biases in resource estimations based on such samples. Second, for fractured and brittle mineralized sections (common in fluorite veins), they are easily damaged during extraction from the drill pipe, transportation, and manual processing, leading to the loss of their original structure and geological information.

[0005] In addition, the existing technical process is lengthy, taking several weeks from sampling to obtaining laboratory analysis results. Geologists cannot optimize borehole layout on-site based on real-time data, resulting in delayed exploration decisions.

[0006] Therefore, under the existing technological framework, "geological representativeness of sampling," "preservation of the original state of fragile samples," and "timeliness of on-site decision-making" constitute the three core bottlenecks in the accurate exploration of fluorite deposits. There is an urgent need for a device that can fundamentally innovate sampling methods from a mechanical perspective, enabling "drilling-while-identifying, boundary-based segmentation, and original state acquisition," thereby ensuring that each sample represents a pure geological unit and improving exploration efficiency.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0008] The purpose of this invention is to provide a sampling and testing device and method for fluorite mineral exploration, which can overcome the shortcomings of existing technologies such as the inability to accurately stratify fluorite minerals in situ, easy sample damage, and slow process. This invention provides a sampling and testing device and method for fluorite mineral exploration that can achieve identification while drilling, accurate stratification, in-situ consolidation, and rapid analysis.

[0009] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution: A sampling and testing device for fluorite mineral exploration includes a frame, a drilling mechanism, a sample holding mechanism, a layered sampling mechanism, a spraying mechanism, and a central control system. The drilling mechanism is rotatably and vertically movable at the bottom of the top wall panel of the frame, and includes a hollow drill rod and a drill bit, the drill bit being threadedly connected to the bottom of the hollow drill rod. The sample holding mechanism includes a sorting cylinder and a linear guide rail unit, the sorting cylinder being coaxially fitted inside the hollow drill rod and capable of vertical linear movement. The layered sampling mechanism includes… The system includes a pre-cutting unit and a top-cutting unit. The pre-cutting unit includes an annular base and multiple cutting components. The annular base is fixedly connected to the inner sidewall of the hollow drill rod near the bottom, and the multiple cutting components are circumferentially arranged on the inner sidewall of the annular base. The spraying mechanism includes an annular distribution pipe and multiple atomizing nozzles. The annular distribution pipe is fixedly connected to the top wall plate of the sorting cylinder, and the multiple atomizing nozzles are disposed through the inner sidewall edge of the top wall plate of the sorting cylinder. A central control system is electrically connected to each mechanism.

[0010] In one or more embodiments of the present invention, a threaded head is fixedly connected to the bottom of the hollow drill rod, and a threaded connection part is provided at the top of the drill bit. The threaded connection part is connected to the threaded head with a coarse-pitch reverse thread. A drive motor for driving its rotation is provided on the hollow drill rod. The drill bit is a hollow part with a conical structure and is made of diamond material.

[0011] In one or more embodiments of the present invention, the linear guide unit includes a first hydraulic drive device, a pair of linear slide rails, and a pair of sliders. The lower end of the piston rod of the first hydraulic drive device is fixedly connected to the top of the sorting cylinder. The pair of linear slide rails are fixedly connected to the inner sidewall of the hollow drill rod. The pair of sliders are fixedly connected to the outer sidewall of the sorting cylinder. The pair of sliders are slidably connected to the pair of linear slide rails. The inner diameter of the sorting cylinder is smaller than the minimum inner diameter of the drill bit.

[0012] In one or more embodiments of the present invention, each of the cutting components includes a miniature hydraulic cylinder and a cutting blade. The cutting blade is fixedly connected to the front end of the piston rod of the miniature hydraulic cylinder, and a serrated groove is formed on the cutting edge of the cutting blade. A plurality of first mounting cavities are formed at equal intervals along the circumference on the inner sidewall of the annular base. The miniature hydraulic cylinder is embedded in the corresponding first mounting cavity. A receiving groove is formed at the outer edge of the first mounting cavity. When the piston rod of the miniature hydraulic cylinder retracts, the cutting blade is stored in the receiving groove.

[0013] In one or more embodiments of the present invention, the top-breaking unit includes a hydraulic ejector pin and a top-breaking head, the top-breaking head is fixedly connected to the front end of the piston rod of the hydraulic ejector pin, and the front end of the top-breaking head is provided with a wedge-shaped portion; a second mounting cavity is provided on the inner sidewall of the annular base in a downwardly inclined manner, and the hydraulic ejector pin is embedded in the second mounting cavity.

[0014] In one or more embodiments of the present invention, the spray port of the atomizing nozzle is arranged to be inclined downward in the direction of the central axis of the sorting cylinder, the annular distribution pipe and the atomizing nozzle are connected by a first connecting pipe, a second connecting pipe is fixedly connected to the liquid inlet of the annular distribution pipe, and the end of the second connecting pipe away from the annular distribution pipe passes through the side wall of the hollow drill rod and is placed on its outside.

[0015] In one or more embodiments of the present invention, the spraying mechanism further includes a rotating conveyor and a media supply unit; the rotating conveyor includes a fixed ring and a rotating ring, the fixed ring is fixedly connected to the outer wall of the hollow drill rod, the rotating ring is rotatably connected to the outer wall of the fixed ring, a sealing layer is provided between the fixed ring and the rotating ring, one end of the second connecting pipe located on the outer side of the hollow drill rod is fixedly connected to the outlet of the fixed ring, and an annular groove is formed on the side wall of the rotating ring facing the fixed ring; the media supply unit includes a media conveying pipe fixedly connected to the inlet of the rotating ring, a regulating valve is provided on the media conveying pipe, a media conveying pump is connected to the end of the media conveying pipe away from the rotating ring, the inlet of the media conveying pump is connected to a media storage tank through a pipeline, and both the media conveying pump and the media storage tank are fixedly mounted on the top wall panel of the support frame.

[0016] In one or more embodiments of the present invention, a driving mechanism for driving the drilling mechanism to move linearly up and down is further included. The driving mechanism includes a fixed sleeve, a fixed frame, a second hydraulic driving device, and a pair of guide rods. The fixed sleeve is sleeved on the top of the hollow drill rod, and the inner sidewall of the outer edge of the fixed sleeve is engaged with the outer sidewall of the rotating ring. The fixed frame is fixedly connected to the fixed sleeve. The second hydraulic driving device is fixedly connected to the top wall panel of the support frame, and its piston rod passes through the top wall panel of the support frame and is fixedly connected to the top wall panel of the fixed frame. The pair of guide rods slide through the top wall panel of the support frame, and their lower ends are fixedly connected to the top wall panel of the fixed frame.

[0017] In one or more embodiments of the present invention, the central control system includes a detection module and a control module; the detection module includes a texture recognition sensor embedded in the inner wall of the sorting cylinder, and the sorting cylinder also integrates an online core integrity assessment unit, the assessment unit being a low-intensity ultrasonic probe array or a micro-resistivity contact sensor; the control module is configured to: receive signals from the detection module, and based on the core integrity assessment results, select and control the layered sampling mechanism to perform one of the following modes: standard layered cutting sampling mode, consolidation protection sampling mode after starting the spraying mechanism, or switch to full-volume rock cuttings collection mode.

[0018] A sampling and testing method for fluorite mineral exploration includes the following steps: S1: Drive the drilling mechanism to drill, and monitor the texture and spectral characteristics of the core column in real time through the detection module; S2: When the preset sampling depth is reached or a lithological change is detected, drilling is paused and the online core integrity assessment unit is activated for assessment. S3: The control module intelligently selects and executes the corresponding sampling mode based on the evaluation results: if the integrity is good, it controls the pre-cutting unit to cut and controls the top-fracture unit to separate the top fragments; if it is moderately broken, it first controls the spraying mechanism to consolidate the core segment in situ, and then executes cutting and sampling; if it is extremely broken, it switches to the rock cuttings collection mode. S4: Control the lifting action of the sample holding mechanism to raise the sorting cylinder carrying the sample section to the transfer station; S5: Transfer the sample to the sample storage module and perform in-situ rapid detection to obtain preliminary grade data; S6: Repeat steps S1-S5 to complete the sequence stratified sampling and generate a survey report integrating sample spatial information and detection data.

[0019] Compared with existing technologies, this invention integrates a layered sampling mechanism inside a rotating hollow drill pipe and works in conjunction with a liftable sorting cylinder equipped with sensors to achieve precise in-situ layered cutting based on lithology identification during drilling. This fundamentally solves the problem of "mixed samples" caused by traditional manual segmentation and ensures the geological representativeness of the samples. For fragile strata, the innovatively designed spraying mechanism can perform in-situ micro-atomization consolidation protection of the core. Combined with an intelligent control system, it adaptively selects the optimal sampling mode based on the core integrity assessment results, significantly improving the success rate and sample integrity of sampling in complex strata. The entire device has a compact structure and achieves a balance between reliability and engineering practicality through ingenious dynamic sealing and transmission design. This integrates the identification, decision-making, sampling, and protection processes within the borehole, greatly improving exploration efficiency and data timeliness. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of a sampling and testing device for fluorite mineral exploration according to an embodiment of the present invention; Figure 2 This is a perspective view of a sampling and detection device for fluorite mineral exploration according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of a sampling and testing device for fluorite mineral exploration according to an embodiment of the present invention; Figure 4 This is a front cross-sectional view of a sampling and detection device for fluorite mineral exploration according to an embodiment of the present invention. Figure 5 This is a right-side cross-sectional view of a sampling and detection device for fluorite mineral exploration according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the mechanism selected in this invention; Figure 7 This is an exploded view of the drilling mechanism in this invention; Figure 8 For the present invention Figure 4 A schematic diagram at point A in the middle; Figure 9 For the present invention Figure 5 A schematic diagram at point B in the middle; Figure 10 For the present invention Figure 5 A schematic diagram at point C in the middle; Figure 11This is an exploded view of the pre-cutting unit in this invention.

[0022] Explanation of key figure labels: 1-Upright frame, 101-Fixing plate, 2-Drilling mechanism, 201-Hollow drill rod, 202-Drill bit, 203-Threaded head, 204-Threaded connection, 205-Drive motor, 3-Sample holding mechanism, 301-Sorting cylinder, 302-First hydraulic drive device, 303-Linear slide rail, 304-Slider, 4-Layered sampling mechanism, 401-Annular base, 402-First mounting cavity, 403-Miniature hydraulic cylinder, 404-Cutting blade, 405-Serrated groove, 406-Receiving slot, 407- Second mounting cavity, 408-hydraulic ejector pin, 409-ejector head, 5-spraying mechanism, 501-annular distribution pipe, 502-atomizing nozzle, 503-first connecting pipe, 504-second connecting pipe, 505-fixed ring, 506-rotating ring, 507-annular groove, 508-medium conveying pipe, 509-regulating valve, 510-medium conveying pump, 511-medium storage tank, 6-drive mechanism, 601-fixed sleeve, 602-fixed frame, 603-second hydraulic drive device, 604-guide rod. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0024] like Figures 1 to 7As shown, a sampling and testing device for fluorite mineral exploration according to one embodiment of the present invention includes a frame 1, a drilling mechanism 2, a sample holding mechanism 3, a layered sampling mechanism 4, a spraying mechanism 5, and a central control system. The drilling mechanism 2 is rotatably and vertically movable at the bottom of the top wall of the frame 1, and includes a hollow drill rod 201 and a drill bit 202, with the drill bit 202 threadedly connected to the bottom of the hollow drill rod 201. The sample holding mechanism 3 includes a sorting cylinder 301 and a linear guide rail unit, with the sorting cylinder 301 coaxially and vertically movable within the hollow drill rod 201. The layer sampling mechanism 4 includes a pre-cutting unit and a top-cutting unit. The pre-cutting unit includes an annular base 401 and multiple cutting components. The annular base 401 is fixedly connected to the inner wall of the hollow drill rod 201 near the bottom. The multiple cutting components are circumferentially arranged on the inner wall of the annular base 401. The spraying mechanism 5 includes an annular distribution pipe 501 and multiple atomizing nozzles 502. The annular distribution pipe 501 is fixedly connected to the top wall of the sorting cylinder 301. The multiple atomizing nozzles 502 are arranged through the inner edge of the top wall of the sorting cylinder 301. The central control system is electrically connected to each mechanism.

[0025] The working principle of the sampling and testing device for fluorite exploration is as follows: Specifically, the device is supported by a frame 1, and drilling is performed by the drilling mechanism 2 to form a core. During this process, the detection unit (i.e., the texture recognition sensor and evaluation unit mentioned later) integrated in the liftable sorting cylinder 301 monitors the passing core in real time and identifies preset depths or lithological abrupt interfaces. When the sampling conditions are met, the drilling mechanism 2 pauses, and the layered sampling mechanism 4 starts: multiple cutting parts of its pre-cutting unit extend radially synchronously from the inner wall of the rotating drill rod, performing precise horizontal cutting on the stationary core column. At the same time, the sorting cylinder 301 of the sample holding mechanism 3 can descend to provide support below the cutting position, and rise with the cut core segment after cutting. For core segments assessed as fragile, the spraying mechanism 5 can spray a curing agent onto the core surface through atomizing nozzles 502 before and after cutting for in-situ reinforcement. The entire process is coordinated and controlled by a central control system, which realizes the operation mode from "identification during drilling" to "precise in-situ segmentation and protection after suspension". This fundamentally solves the problem of "mixed samples" caused by artificial segmentation on the surface in the background technology, as well as the problem of easy damage to the core, and ensures the stratigraphic representativeness and structural integrity of the sample.

[0026] like Figure 7 As shown, a threaded head 203 is fixedly connected to the bottom of the hollow drill rod 201, and a threaded connection part 204 is provided on the top of the drill bit 202. The threaded connection part 204 is connected to the threaded head 203 with a coarse reverse thread. A drive motor 205 for driving its rotation is provided on the hollow drill rod 201. The drill bit 202 is a hollow part with a conical structure and is made of diamond material.

[0027] Specifically, by using coarse-tooth reverse thread to connect the hollow drill bit 202 and the drill rod 201, the mechanical reliability of the connection is ensured under high-intensity rotary drilling conditions, effectively preventing the drill bit from loosening. At the same time, the conical drill bit made of diamond material significantly improves the efficiency of drilling into hard rock formations and the quality of core samples, providing a structurally complete basic core for subsequent precise stratification.

[0028] like Figure 4 Combination Figure 8 As shown, the linear guide unit includes a first hydraulic drive device 302, a pair of linear slide rails 303, and a pair of sliders 304. The lower end of the piston rod of the first hydraulic drive device 302 is fixedly connected to the top of the sorting cylinder 301; the pair of linear slide rails 303 are fixedly connected to the inner side wall of the hollow drill rod 201; the pair of sliders 304 are fixedly connected to the outer side wall of the sorting cylinder 301; the pair of sliders 304 are slidably connected to the pair of linear slide rails 303 respectively; the inner diameter of the sorting cylinder 301 is smaller than the minimum inner diameter of the drill bit 202.

[0029] Specifically, the first hydraulic drive device 302, slide rail 303, and slider 304 of the linear guide unit provide high-precision and high-stability linear motion guidance for the sorting cylinder 301 inside the hollow drill rod 201. This structure ensures that the sorting cylinder can rise and fall strictly along the axis, accurately supporting the sample during cutting and smoothly transporting it upwards after sampling. It is a key mechanical guarantee for achieving "precise in-situ reception" and "vertical transfer of samples in their original state".

[0030] like Figure 4 Combination Figure 11 As shown, each cutting component includes a miniature hydraulic cylinder 403 and a cutting blade 404. The cutting blade 404 is fixedly connected to the front end of the piston rod of the miniature hydraulic cylinder 403, and a serrated groove 405 is provided on the cutting edge of the cutting blade 404. Multiple first mounting cavities 402 are provided at equal intervals along the circumference on the inner side wall of the annular base 401. The miniature hydraulic cylinder 403 is embedded in the corresponding first mounting cavity 402. A storage groove 406 is provided at the outer edge of the first mounting cavity 402. When the piston rod of the miniature hydraulic cylinder 403 retracts, the cutting blade 404 is stored in the storage groove 406.

[0031] Specifically, the detailed structure of the pre-cutting unit, including the micro hydraulic cylinder 403, the serrated cutting blade 404, and the storage groove 406, enables the radially controllable extension and precise repositioning of the cutting blade. The serrated groove 405 design enhances the rock-breaking ability of the cutting edge, while the storage groove 406 ensures that the cutting blade 404 is flush with the inner wall of the drill pipe after retraction, completely avoiding interference of the cutting blade 404 with the normal upward movement of the core column or the up-and-down movement of the sorting cylinder, thus ensuring the continuity of the process.

[0032] like Figure 5 Combination Figure 9 As shown, the top-breaking unit includes a hydraulic ejector pin 408 and a top-breaking head 409. The top-breaking head 409 is fixedly connected to the front end of the piston rod of the hydraulic ejector pin 408, and the front end of the top-breaking head 409 is provided with a wedge-shaped part. A second mounting cavity 407 is provided on the inner side wall of the annular base 401 in a downward inclined manner, and the hydraulic ejector pin 408 is embedded in the second mounting cavity 407.

[0033] Specifically, the inclined hydraulic jack 408 and wedge-shaped jacking head 409 of the top-fracture unit provide a separation mechanism beyond horizontal cutting. When the bottom of the core is cut by the pre-cutting unit, the top-fracture unit applies force obliquely and uses the wedge-shaped part of the jacking head 409 to pry off the connection, ensuring that the cut core segment can be reliably captured by the sorting tube as a complete unit, thus improving adaptability to different lithological strata.

[0034] like Figure 4 and Figure 8 As shown, the spray port of the atomizing nozzle 502 is set in a downward direction towards the central axis of the sorting cylinder 301. The annular distribution pipe 501 and the atomizing nozzle 502 are connected by a first connecting pipe 503. A second connecting pipe 504 is fixedly connected to the liquid inlet of the annular distribution pipe 501. The end of the second connecting pipe 504 away from the annular distribution pipe 501 passes through the side wall of the hollow drill rod 201 and is placed on its outside.

[0035] Specifically, the atomized droplets ejected from the atomizing nozzle 502 cover the outer surface of the sample section at a certain spray angle. The solvent (such as acetone or ethanol) evaporates rapidly upon contact with the surface, causing the polymer (such as oligomers) to form an extremely thin (tens to hundreds of micrometers), dense, and tough transparent protective shell on the sample surface. The entire process lasts approximately 1-3 seconds.

[0036] like Figure 2 , Figure 5 and Figure 10As shown, the spraying mechanism 5 also includes a rotating conveyor and a medium supply unit; the rotating conveyor includes a fixed ring 505 and a rotating ring 506. The fixed ring 505 is fixedly connected to the outer wall of the hollow drill rod 201, and the rotating ring 506 is rotatably connected to the outer wall of the fixed ring 505. A sealing layer is provided between the fixed ring 505 and the rotating ring 506. One end of the second connecting pipe 504, located on the outer side of the hollow drill rod 201, is fixedly connected to the outlet of the fixed ring 505. The rotating ring 506 faces the fixed ring 505. An annular groove 507 is provided on the side wall of the fixed ring 505; the medium supply unit includes a medium delivery pipe 508 fixedly connected to the liquid inlet of the rotating ring 506, a regulating valve 509 is provided on the medium delivery pipe 508, a medium delivery pump 510 is connected to the end of the medium delivery pipe 508 away from the rotating ring 506, and a medium storage tank 511 is connected to the liquid inlet of the medium delivery pump 510 through a pipeline. Both the medium delivery pump 510 and the medium storage tank 511 are fixed on the top wall panel of the support frame 1.

[0037] Specifically, the rotating conveyor fixed ring 505 and rotating ring 506 innovatively solve the problem of dynamic sealing and continuous conveying between the rotating drill rod and the stationary spraying liquid supply system, enabling the spraying protection function to be reliably started and stopped at any position of the drill rod rotation. It is the core support structure for realizing "in-situ instant reinforcement" of broken samples.

[0038] like Figures 1 to 4 As shown, it also includes a drive mechanism 6 for driving the drilling mechanism 2 to move linearly up and down. The drive mechanism 6 includes a fixed sleeve 601, a fixed frame 602, a second hydraulic drive device 603, and a pair of guide rods 604. The fixed sleeve 601 is sleeved on the top of the hollow drill rod 201, and the inner side wall of the outer edge of the fixed sleeve 601 is engaged with the outer side wall of the rotating ring 506. The fixed frame 602 is fixedly connected to the fixed sleeve 601. The second hydraulic drive device 603 is fixedly connected to the top wall plate of the support frame 1, and its piston rod passes through the top wall plate of the support frame 1 and is fixedly connected to the top wall plate of the fixed frame 602. The pair of guide rods 604 slide through the top wall plate of the support frame 1, and their lower ends are fixedly connected to the top wall plate of the fixed frame 602.

[0039] Specifically, the second hydraulic drive unit 603, guide rod 604, and fixed frame 602 of the drive mechanism provide stable and controllable axial feed power for the entire drilling mechanism. The guide rod 604 ensures the vertical accuracy of drilling and avoids hole deviation; the hydraulic drive provides sufficient thrust and stable feed speed, which is a prerequisite for the device to carry out controllable drilling and pause precisely at the predetermined position.

[0040] Preferably, the central control system includes a detection module and a control module; the detection module includes a texture recognition sensor embedded in the inner wall of the sorting cylinder 301, and the sorting cylinder 301 also integrates an online core integrity assessment unit, which is a low-intensity ultrasonic probe array or a micro-resistivity contact sensor; the control module is configured to receive signals from the detection module and, based on the core integrity assessment results, select to control the layered sampling mechanism 4 to execute one of the following modes: standard layered cutting sampling mode, consolidation protection sampling mode after starting the spraying mechanism 5, or switch to full-volume rock cuttings collection mode.

[0041] Specifically, by integrating a core integrity assessment unit and linking it with the control module, the device possesses intelligent "sensing-judgment-execution" capabilities. It can automatically select the optimal sampling strategy (standard cutting, post-consolidation cutting, or collecting rock fragments) based on the actual physical state of the core (good, moderately broken, extremely broken), achieving adaptive operation in complex formations and greatly improving the device's reliability and sampling success rate.

[0042] The specific structure and working logic of the central control system are as follows: The central control system (not shown in the figure) includes a hardware control unit and a software logic module. The hardware control unit is preferably an industrial PLC or an embedded industrial computer, which is electrically connected to the drive motor 205, the first hydraulic drive device 302, the second hydraulic drive device 603, the miniature hydraulic cylinder 403, the hydraulic pin 408, the medium delivery pump 510, the regulating valve 509, and the detection module (texture recognition sensor, core integrity assessment unit) via cables, forming a complete measurement and control network. The software logic module is stored in the control unit's memory and is programmed to: receive and process sensor signals from the detection module in real time; trigger sampling commands based on preset depth or lithological abrupt change signals; call the core integrity assessment algorithm; and automatically generate and issue corresponding control command sequences based on the assessment results of "good / moderately broken / extremely broken". For example, in the "moderately broken" mode, the control logic is as follows: turn off the drive motor 205 → start the first hydraulic drive device 302 to support the sorting cylinder 301 as it descends → turn on the medium delivery pump 510 and the regulating valve 509 to start the spraying mechanism 5 → delay for a predetermined time to complete consolidation → turn off the spraying → start the micro hydraulic cylinder 403 to perform cutting → start the first hydraulic drive device 302 to lift the sorting cylinder. The timing, interlocking relationships, and fault diagnosis of all actions are managed by this software logic module.

[0043] The hardware selection, programming methods, and basic control logic of the central control system can be implemented using technologies known in the field, and are not improvements of this invention, so they will not be described in detail here. The device is also equipped with other auxiliary electrical components required by the control system; since these do not involve improvements to the technical solution and are existing technologies, they will not be described in detail here.

[0044] In operation, the device is supported by the frame 1, and the hollow drill rod 201 and drill bit 202 of the drilling mechanism 2 rotate to drill and form a core. Sensors integrated inside the sorting cylinder 301 of the sample holding mechanism 3 identify the lithological interface in real time. When sampling is required, the drill rod stops rotating, and multiple cutting components in the pre-cutting unit of the layered sampling mechanism 4 extend radially to precisely cut the core. After cutting, the core is completely broken off by the oblique force of the top-breaking unit. At the same time, the sorting cylinder 301 descends to support the core and carries the sample segment upward after cutting. If the core is fragile, the atomizing nozzle 502 of the spraying mechanism 5 receives the curing agent through the annular distribution pipe 501 and performs in-situ atomized spraying reinforcement on the sample segment. The entire process is intelligently coordinated by the central control system, thus realizing a fully automated process from drilling identification and in-situ precise cutting to immediate sample protection, ensuring the layered representativeness and structural integrity of the sample.

[0045] Another embodiment of the present invention provides a sampling and testing method for fluorite mineral exploration, comprising the following steps: S1: Drive the drilling mechanism 2 to drill, and monitor the texture and spectral characteristics of the core column in real time through the detection module; S2: When the preset sampling depth is reached or a lithological change is detected, drilling is paused and the core integrity online assessment unit is activated for evaluation; S3: Based on the evaluation results, the control module intelligently selects and executes the corresponding sampling mode: if the integrity is good, it controls the pre-cutting unit to cut and controls the top-fracture unit to separate the top fragment; if it is moderately broken, it first controls the spraying mechanism 5 to consolidate the core segment in situ, and then executes cutting and sampling; if it is extremely broken, it switches to the rock cuttings collection mode. S4: Control the lifting action of the sample holding mechanism 3 so that the sorting cylinder 301 carries the sample section up to the transfer station; S5: Transfer the sample to the sample storage module and perform in-situ rapid detection to obtain preliminary grade data; S6: Repeat steps S1-S5 to complete the sequence stratified sampling and generate a survey report integrating sample spatial information and detection data.

[0046] It should be noted that when the air classifier 301 carries the sample section for transfer, the pre-cutting unit supports the bottom of the sample section.

[0047] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sampling and testing device for fluorite mineral exploration, characterized in that, include: Erecting the frame; The drilling mechanism is rotatably and vertically movable at the bottom of the top wall panel of the support frame, and includes a hollow drill rod and a drill bit, wherein the drill bit is threadedly connected to the bottom of the hollow drill rod. The sample holding mechanism includes a sorting cylinder and a linear guide rail unit, wherein the sorting cylinder is coaxially fitted inside the hollow drill rod and can move linearly up and down; A layered sampling mechanism includes a pre-cutting unit and a top-cutting unit. The pre-cutting unit includes an annular base and multiple cutting components. The annular base is fixedly connected to the inner wall of the hollow drill rod near the bottom. The multiple cutting components are circumferentially arranged on the inner wall of the annular base. The spraying mechanism includes an annular distribution pipe and multiple atomizing nozzles. The annular distribution pipe is fixedly connected to the top wall plate of the sorting cylinder, and the multiple atomizing nozzles are disposed through the inner side wall edge of the top wall plate of the sorting cylinder. The central control system is electrically connected to each department.

2. The sampling and testing device for fluorite mineral exploration according to claim 1, characterized in that, The bottom of the hollow drill rod is fixedly connected to a threaded head, and the top of the drill bit is provided with a threaded connection part, which is connected to the threaded head with a coarse reverse thread. The hollow drill rod is equipped with a drive motor for rotating it; and The drill bit is a hollow, tapered structure made of diamond.

3. The sampling and testing device for fluorite mineral exploration according to claim 2, characterized in that, The linear guide unit includes: The lower end of the piston rod of the first hydraulic drive device is fixedly connected to the top of the sorting cylinder; A pair of linear slide rails are fixedly connected to the inner wall of the hollow drill rod; A pair of sliders are fixedly connected to the outer wall of the sorting cylinder; The pair of sliders are respectively slidably connected within the pair of linear slide rails; The inner diameter of the sorting cylinder is smaller than the minimum inner diameter of the drill bit.

4. A sampling and testing device for fluorite mineral exploration according to claim 1, characterized in that, Each of the cutting components includes a miniature hydraulic cylinder and a cutting blade. The cutting blade is fixedly connected to the front end of the piston rod of the miniature hydraulic cylinder, and the cutting blade has a serrated groove on its cutting edge. The inner wall of the annular base is provided with a plurality of first mounting cavities at equal intervals along the circumference. The miniature hydraulic cylinder is embedded in the corresponding first mounting cavity. A storage groove is provided at the outer edge of the first mounting cavity. When the piston rod of the miniature hydraulic cylinder retracts, the cutting blade is stored in the storage groove.

5. A sampling and testing device for fluorite mineral exploration according to claim 4, characterized in that, The top-breaking unit includes a hydraulic ejector pin and a top-breaking head. The top-breaking head is fixedly connected to the front end of the piston rod of the hydraulic ejector pin, and the front end of the top-breaking head is provided with a wedge-shaped part. The inner wall of the annular base is provided with a second mounting cavity in a downward inclined manner, and the hydraulic pin is embedded in the second mounting cavity.

6. A sampling and testing device for fluorite mineral exploration according to claim 1, characterized in that, The spray nozzle of the atomizing nozzle is inclined downwards towards the central axis of the sorting cylinder. The annular distribution pipe and the atomizing nozzle are connected by a first connecting pipe. A second connecting pipe is fixedly connected to the liquid inlet of the annular distribution pipe. The end of the second connecting pipe away from the annular distribution pipe passes through the side wall of the hollow drill rod and is placed on its outside.

7. A sampling and testing device for fluorite mineral exploration according to claim 6, characterized in that, The spraying mechanism also includes a rotating conveyor and a media supply unit; The rotating conveying component includes a fixed ring and a rotating ring. The fixed ring is fixedly connected to the outer wall of the hollow drill rod, and the rotating ring is rotatably connected to the outer wall of the fixed ring. A sealing layer is provided between the fixed ring and the rotating ring. One end of the second connecting pipe, located on the outside of the hollow drill rod, is fixedly connected to the liquid outlet of the fixed ring. An annular groove is provided on the side wall of the rotating ring facing the fixed ring. The medium supply unit includes a medium delivery pipe fixedly connected to the liquid inlet of the rotating ring. A regulating valve is provided on the medium delivery pipe. A medium delivery pump is connected to the end of the medium delivery pipe away from the rotating ring. The liquid inlet of the medium delivery pump is connected to a medium storage tank through a pipeline. Both the medium delivery pump and the medium storage tank are fixedly mounted on the top wall panel of the support frame.

8. A sampling and testing device for fluorite mineral exploration according to claim 7, characterized in that, It also includes a drive mechanism for driving the drilling mechanism to move linearly up and down, the drive mechanism comprising: A fixed sleeve is fitted onto the top of the hollow drill rod, and the inner side wall of the outer edge of the fixed sleeve is engaged with the outer side wall of the rotating ring. The fixing bracket is fixedly connected to the fixing sleeve; The second hydraulic drive device is fixedly connected to the top wall panel of the upright, and its piston rod passes through the top wall panel of the upright and is fixedly connected to the top wall panel of the fixed frame. A pair of guide rods slide through the top wall panel of the upright, and their lower ends are fixedly connected to the top wall panel of the fixed frame.

9. A sampling and testing device for fluorite mineral exploration according to claim 1, characterized in that, The central control system includes a detection module and a control module; The detection module includes a texture recognition sensor embedded in the inner wall of the sorting cylinder. The sorting cylinder also integrates an online core integrity assessment unit, which is a low-intensity ultrasonic probe array or a micro-resistivity contact sensor. The control module is configured to receive signals from the detection module and, based on the core integrity assessment results, select one of the following modes to control the layered sampling mechanism to perform: standard layered cutting sampling mode, consolidation protection sampling mode after starting the spraying mechanism, or switch to full-volume rock cuttings collection mode.

10. A sampling and testing method for fluorite mineral exploration, used in the sampling and testing device for fluorite mineral exploration as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Drive the drilling mechanism to drill, and monitor the texture and spectral characteristics of the core column in real time through the detection module; S2: When the preset sampling depth is reached or a lithological change is detected, drilling is paused and the online core integrity assessment unit is activated for assessment. S3: The control module intelligently selects and executes the corresponding sampling mode based on the evaluation results: if the integrity is good, it controls the pre-cutting unit to cut and controls the top-fracture unit to separate the top fragment; if it is moderately broken, it first controls the spraying mechanism to consolidate the core segment in situ, and then executes cutting and sampling; if it is extremely broken, it switches to the rock cuttings collection mode. S4: Control the lifting action of the sample holding mechanism to raise the sorting cylinder carrying the sample section to the transfer station; S5: Transfer the sample to the sample storage module and perform in-situ rapid detection to obtain preliminary grade data; S6: Repeat steps S1-S5 to complete the sequence stratified sampling and generate a survey report integrating sample spatial information and detection data.

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