Sampling device and sampling method for roadway rock analysis

Abstract

The invention discloses a sampling device for roadway rock analysis and a sampling method, the sampling device comprises a hollow drill rod and a mounting rack, one end of the hollow drill rod is provided with a drill bit, the other end of the hollow drill rod is provided with a connecting sleeve, and one end, far away from the hollow drill rod, of the connecting sleeve is provided with a driving shaft; the ends, close to each other, of the hollow drill rod and the driving shaft are rotationally connected with the mounting frame, a discharging hole is formed in the side face of the connecting sleeve, and a pushing piece capable of pushing and moving out samples in the discharging hole is arranged on the side face of the mounting frame. According to the device and the method, integrated operation of drilling, truncation and push-out is realized, rapid and safe collection of roadway roof rock samples can be realized, coring after a drill rod is lifted out is not needed, preliminary judgment of rock hardness can be synchronously completed in the sampling process, and instant data support is provided for mining method selection and support design.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prospecting equipment, in particular to a sampling device for roadway rock analysis and a sampling method. BACKGROUND

[0002] With the continuous development of mineral resources, the mining of complex and difficult ore bodies (such as composite ore bodies, thin layer ore bodies, and irregular ore bodies) has become a key challenge in mining engineering. Such ore bodies have irregular shapes, large thickness variations, and complex geological structures, making it difficult for traditional single mining methods to meet the needs of safe and efficient mining. Therefore, collaborative mining techniques (such as the coordination of multiple mining methods, the reconstruction of mining environments, and the collaborative treatment of mined-out areas) have been proposed and have become an important research direction. In collaborative mining, accurately determining the lithology, hardness, and structural characteristics of the roadway roof rock is a prerequisite for designing mining methods, optimizing support parameters, and preventing roof accidents.

[0003] Currently, roadway roof rock sampling mainly relies on traditional drilling technology: a drill rig is used to drill upward to obtain a core, and when the core tube is full or the predetermined footage is reached, the entire drill rod must be removed from the ground, and the sample must be manually removed from the core tube. This method has obvious defects: 1. Low efficiency and high labor intensity: each sampling requires repeated drilling and rod removal, which is time-consuming and inconvenient, especially in narrow roadway spaces; 2. Unable to obtain real-time lithology parameters: traditional methods can only obtain samples, but cannot simultaneously detect rock hardness and other mechanical properties during sampling, making it difficult to guide on-site production decisions in real time. In the prior art, some rock layer sampling devices (such as the tunnel rock drilling and sampling device of application number CN115929240A) have been developed, but they are mainly designed for ground or horizontal drilling, and lack real-time lithology analysis functions.

[0004] Therefore, there is an urgent need for a special device for roadway roof rock sampling that can achieve efficient, safe, and automated sampling while simultaneously obtaining lithology mechanical data to support the design and safety control of complex ore body collaborative mining. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the existing defects and provide a sampling device for roadway rock analysis and a sampling method that can achieve rapid and safe collection of roadway roof rock samples without the need to remove the drill rod for coring. Moreover, the device can simultaneously complete preliminary rock hardness determination during the sampling process, providing immediate data support for mining method selection and support design, and effectively solving the problems in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a sampling device for roadway rock analysis, comprising a hollow drill rod and a mounting frame, one end of the hollow drill rod is provided with a drill bit, and the other end of the hollow drill rod is provided with a connecting sleeve, and one end of the connecting sleeve away from the hollow drill rod is provided with a drive shaft; The end of the hollow drill rod and the drive shaft away from each other is rotatably connected with the mounting frame, the side of the connecting sleeve is provided with a discharge hole, and the side of the mounting frame is provided with a pushing piece capable of pushing and removing the sample in the discharge hole.

[0007] As a preferred technical scheme of the present application, the end of the drive shaft away from the connecting sleeve is provided with a flange connected with the flange plate of the external driving device.

[0008] As a preferred technical scheme of the present application, the pushing piece comprises an electro-hydraulic push rod mounted on the mounting frame, the telescopic end of the electro-hydraulic push rod is provided with a mounting disc, the mounting disc is provided with an extrusion plate capable of being inserted into the inside of the discharge hole, and a pressure sensor is mounted between the mounting disc and the extrusion plate.

[0009] As a preferred technical scheme of the present application, the drive shaft is provided with a cylindrical groove in communication with the discharge hole, and the inside of the cylindrical groove is provided with an elastic column.

[0010] As a preferred technical scheme of the present application, the side of the mounting frame is provided with a positioning plate, the positioning plate is provided with a telescopic rod, and the top of the telescopic rod is provided with a base capable of being inserted into the ground.

[0011] A sampling method of a sampling device for roadway rock analysis, comprising the following steps: S1: equipment installation and positioning: the sampling device is connected with the flange plate of the external driving device through the flange, and is transported to the position below the predetermined sampling point in the roadway, the mounting frame is stably fixed to the ground by adjusting the telescopic rod and the base on the side of the mounting frame; S2: drilling and rock sample collection: the external driving device is started, the hollow drill rod and the drill bit are rotated by the drive shaft, and drilling is carried out from bottom to top to the roof of the roadway; the rock sample falling off in the drilling process falls into the inside of the hollow drill rod, and slides down along the connecting sleeve, and finally is received by the elastic column in the drive shaft, and the rock sample collection is completed; S3: rock sample cutting and pushing out: when the drilling reaches the predetermined depth or the rock sample fills the collection area, the drilling is stopped; the electro-hydraulic push rod is started, the telescopic end of the electro-hydraulic push rod pushes the mounting disc and the extrusion plate to move horizontally, so that the extrusion plate is inserted into the discharge hole of the connecting sleeve, and the rock sample column in the cavity is cut transversely; the electro-hydraulic push rod continues to push, and the cut rock sample section is completely pushed out of the discharge hole and falls into the pre-placed collection container; S4: Collecting the lithology hardness data synchronously: in step S, when the extrusion plate contacts and extrudes the rock sample, the pressure sensor installed between the mounting disc and the extrusion plate detects the reaction force of the rock sample on the extrusion plate in real time and transmits the force signal to an external data recorder or display device; according to the size of the reaction force, the hardness of the rock at the current sampling point is preliminarily judged and analyzed; S5: Resetting and subsequent operation: after the sample is pushed out, the electro-hydraulic push rod is controlled to retract, driving the extrusion plate to retreat to the initial position; the device can be moved to the next sampling point, and steps S1 to S4 are repeated to perform continuous sampling operation.

[0012] Compared with the prior art, the beneficial effects of the present application are: 1. The roadway rock analysis sampling device and sampling method of the present application realize integrated operation of "drilling - cutting - pushing out", without the need to take out the drill rod for coring, which significantly improves the sampling efficiency.

[0013] 2. The roadway rock analysis sampling device and sampling method of the present application can detect the reaction force of the rock sample on the extrusion plate in real time when the extrusion plate cuts the rock sample; the reaction force data can indirectly reflect the hardness or firmness of the rock, realizing preliminary and rapid judgment of the lithology during sampling, which provides key basis for on-site mining method adjustment and support decision. This makes up for the hysteresis of the traditional method that needs to send the sample to the laboratory to obtain the mechanical parameters.

[0014] 3. The roadway rock analysis sampling device and sampling method of the present application can realize rapid and safe collection of the roadway roof rock sample, without the need to take out the drill rod for coring, and can also complete the preliminary judgment of the rock hardness synchronously during sampling, which provides real-time data support for mining method selection and support design. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural schematic view of the present application; Fig. 2 is a structural schematic view of the present application; Fig. 3 is a structural schematic view of the present application.

[0016] In the figure: 1 hollow drill rod, 2 drill bit, 3 connecting sleeve, 31 discharge hole, 4 drive shaft, 41 elastic column, 42 flange, 5 mounting bracket, 6 electro-hydraulic push rod, 61 mounting disc, 62 extrusion plate, 63 pressure sensor, 7 positioning plate, 8 telescopic rod, 81 base. DETAILED DESCRIPTION

[0017] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0018] Please refer to Figs. 1-3 The present application provides a technical solution: a sampling device for roadway rock analysis, comprising a hollow drill rod 1 and a mounting frame 5, one end of the hollow drill rod 1 is provided with a drill bit 2, and the other end of the hollow drill rod 1 is provided with a connecting sleeve 3, and the end of the connecting sleeve 3 away from the hollow drill rod 1 is provided with a drive shaft 4; The end of the hollow drill rod 1 and the drive shaft 4 close to each other is rotatably connected with the mounting frame 5, the side of the connecting sleeve 3 is provided with a discharge hole 31, and the side of the mounting frame 5 is provided with a pushing piece capable of pushing and removing the sample in the discharge hole 31.

[0019] Further, the end of the drive shaft 4 away from the connecting sleeve 3 is provided with a flange 42 connected with the flange of the external driving device, the sampling device is connected with the flange of the external driving device through the flange 42, and is transported to below the predetermined sampling point in the roadway, the external driving device can drive the drive shaft 4 to rotate and move along the axial direction of the drive shaft 4, so as to push the device.

[0020] Further, the pushing piece comprises an electro-hydraulic push rod 6 mounted on the mounting frame 5, the telescopic end of the electro-hydraulic push rod 6 is provided with a mounting disc 61, the mounting disc 61 is provided with an extrusion plate 62 capable of being inserted into the inside of the discharge hole 31, and a pressure sensor 63 is mounted between the mounting disc 61 and the extrusion plate 62, which can detect the reaction force of the rock sample on the extrusion plate in real time when the extrusion plate cuts off the rock sample; the reaction force data can indirectly reflect the hardness or firmness of the rock, so as to realize the preliminary and rapid judgment of the lithology during the sampling process, and provide a key basis for the adjustment of the on-site mining method and the support decision, which makes up for the hysteresis of the traditional method that needs to send the sample to the laboratory to obtain the mechanical parameters.

[0021] Further, a cylindrical groove is formed in the drive shaft 4 and communicates with the discharge hole 31, and an elastic column 41 is arranged in the cylindrical groove.

[0022] Further, the side of the mounting frame 5 is provided with a positioning plate 7, the positioning plate 7 is provided with a telescopic rod 8, the top of the telescopic rod 8 is provided with a base 81 capable of being inserted into the ground, so as to avoid the mounting frame 5 from rotating with the hollow drill rod 1 and the drive shaft 4.

[0023] A sampling method of a sampling device for roadway rock analysis, comprising the following steps: S1: Equipment installation and positioning: Connect the sampling device to the flange of the external drive equipment through the flange 42, and transport it to the area below the predetermined sampling point in the tunnel. By adjusting the telescopic rod 8 and the base 81 on the side of the mounting frame 5, the mounting frame 5 is stably fixed to the ground. S2: Drilling and rock sample collection: Start the external drive equipment, drive the hollow drill rod 1 and drill bit 2 to rotate through the drive shaft 4, and drill from bottom to top towards the roof of the tunnel; rock samples that fall off during the drilling process fall into the hollow drill rod 1 and slide down along the connecting sleeve 3, and are finally received by the elastic column 41 in the drive shaft 4, thus completing the rock sample collection. S3: Rock Sample Cutting and Pushing Out: When drilling reaches the predetermined depth or the rock sample fills the collection area, drilling is stopped; the electro-hydraulic push rod 6 is activated, and its telescopic end pushes the mounting plate 61 and the extrusion plate 62 to move horizontally, so that the extrusion plate 62 is inserted into the discharge hole 31 of the connecting sleeve 3, cutting the rock sample column in the cavity laterally; the electro-hydraulic push rod 6 continues to advance, pushing the cut rock sample segment completely out of the discharge hole 31 and into the pre-placed collection container; S4: Synchronous acquisition of lithological hardness data: In step S3, when the extrusion plate 62 contacts and extrudes the rock sample, the pressure sensor 63 installed between the mounting plate 61 and the extrusion plate 62 detects the reaction force of the rock sample on the extrusion plate in real time and transmits the force signal to an external data recorder or display device; based on the magnitude of the reaction force, a preliminary judgment and analysis of the hardness of the rock at the current sampling point is made. S5: Reset and subsequent operation: After the sample is pushed out, control the electro-hydraulic push rod 6 to retract, driving the squeezing plate 62 back to the initial position; the device can be moved to the next sampling point, repeating steps S1 to S4 to perform continuous sampling operations.

[0024] This invention enables rapid and safe collection of rock samples from tunnel roof without the need to remove the drill rod for core extraction. Furthermore, it allows for a preliminary assessment of rock hardness during the sampling process, providing real-time data support for mining method selection and support design.

[0025] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. 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 variations 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 tunnel rock analysis, comprising a hollow drill rod (1) and a mounting frame (5), characterized in that: One end of the hollow drill rod (1) is provided with a drill bit (2), and the other end of the hollow drill rod (1) is provided with a connecting sleeve (3). The end of the connecting sleeve (3) away from the hollow drill rod (1) is provided with a drive shaft (4). The hollow drill rod (1) and the drive shaft (4) are rotatably connected to the mounting frame (5) at their respective ends. The side of the connecting sleeve (3) is provided with a discharge hole (31). The side of the mounting frame (5) is provided with a pusher that can push out and remove the sample in the discharge hole (31).

2. The sampling device for tunnel rock analysis according to claim 1, characterized in that: The drive shaft (4) has a flange (42) at the end away from the connecting sleeve (3) that is connected to the flange of the external drive device.

3. The sampling device for tunnel rock analysis according to claim 2, characterized in that: The pusher includes an electro-hydraulic push rod (6) mounted on a mounting bracket (5). The telescopic end of the electro-hydraulic push rod (6) is equipped with a mounting plate (61). The mounting plate (61) is equipped with an extrusion plate (62) that can be inserted into the discharge hole (31). A pressure sensor (63) is installed between the mounting plate (61) and the extrusion plate (62).

4. The sampling device for tunnel rock analysis according to claim 3, characterized in that: The drive shaft (4) has a cylindrical groove that communicates with the discharge hole (31), and the cylindrical groove is provided with an elastic column (41).

5. The sampling device for tunnel rock analysis according to claim 4, characterized in that: The mounting bracket (5) has a positioning plate (7) on its side, and a telescopic rod (8) is provided on the positioning plate (7). The top of the telescopic rod (8) is provided with a base (81) that can be inserted into the ground.

6. A sampling method based on the sampling device for tunnel rock analysis according to claim 5, characterized in that: Includes the following steps: S1: Equipment installation and positioning: Connect the sampling device to the flange of the external drive equipment through the flange (42) and transport it to the area below the predetermined sampling point in the roadway. By adjusting the telescopic rod (8) on the side of the mounting frame (5) and the base (81), the mounting frame (5) is stably fixed to the ground. S2: Drilling and rock sample collection: Start the external drive equipment, drive the hollow drill rod (1) and drill bit (2) to rotate through the drive shaft (4), and drill from bottom to top towards the roof of the tunnel; rock samples that fall off during the drilling process fall into the hollow drill rod (1) and slide down along the connecting sleeve (3), and are finally received by the elastic column (41) in the drive shaft (4), thus completing the rock sample collection; S3: Rock sample cutting and ejection: When drilling reaches the predetermined depth or the rock sample fills the collection area, stop drilling; start the electro-hydraulic push rod (6), its telescopic end pushes the mounting plate (61) and the extrusion plate (62) to move horizontally, so that the extrusion plate (62) is inserted into the discharge hole (31) of the connecting sleeve (3) and cuts the rock sample column in the cavity laterally; the electro-hydraulic push rod (6) continues to advance, and pushes the cut rock sample section completely out of the discharge hole (31) and falls into the pre-placed collection container; S4: Synchronous acquisition of lithological hardness data: In step S3, when the extrusion plate (62) contacts and extrudes the rock sample, the pressure sensor (63) installed between the mounting plate (61) and the extrusion plate (62) detects the reaction force of the rock sample on the extrusion plate in real time and transmits the force signal to an external data recorder or display device; based on the magnitude of the reaction force, a preliminary judgment and analysis of the hardness of the rock at the current sampling point is made; S5: Reset and subsequent operation: After the sample is pushed out, control the electro-hydraulic push rod (6) to retract, driving the squeezing plate (62) back to the initial position; the device can be moved to the next sampling point, repeating steps S1 to S4 to carry out continuous sampling operations.

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