Spraying and dust-settling system for ore removal access road of underground mine stope

Abstract

The utility model provides an underground mine stope ore removal access spray dust-settling system, which comprises a circulating water path assembly, a plurality of branch pipes, a plurality of water inlet pipes, a plurality of water outlet pipes, a plurality of water inlet pipes, a plurality of water outlet pipes, a plurality of water outlet pipes and a plurality of water outlet pipes, the water outlet pipes are connected in parallel on a water supply system, and the branch pipes are arranged between adjacent ore heaps at intervals. The upper end part is arranged along the outer side of the ore heap; the multidirectional spraying assembly comprises a central spraying pipe vertically arranged on the branch pipe and inclined spraying pipes symmetrically distributed at the two ends of the central spraying pipe, the spraying end of the central spraying pipe points to the top end of the ore heap, the inclined spraying pipes horizontally or downwards incline to face the outer side surface of the ore heap, and atomizing nozzles are installed at the tail ends of the spraying pipes. Flying dust at the top of an ore heap is accurately suppressed through the vertical spray pipe, lateral dust diffusion is blocked through the inclined spray pipe, and multi-dimensional three-dimensional dust suppression coverage is achieved; and the wetting and permeating action efficiency of the ore heap is greatly improved, so that the outer side and the inner side of the ore heap can be infiltrated, and dust is greatly reduced in subsequent ore removal.

Description

Technical Field

[0001] This utility model relates to the technical field of underground mining equipment, and in particular to a dust suppression spray system for ore extraction routes in underground mines. Background Technology

[0002] Currently, dust suppression operations in all mining areas of the Shaxi Copper Mine mostly involve installing water spray pipes at the top and middle of the mining area. This water spraying setup can only be carried out after the top of the mining area has been broken. Because water seeps downwards relatively slowly, this results in uneven watering and incomplete coverage of the ore pile. Generally, it takes two days after the spraying setup to see water seeping down into the ore access road, and seven days to see damp ore at the ore access point. This long timeframe is extremely detrimental to the dust suppression effect during mining.

[0003] Furthermore, the spraying system at the top and middle sections of the mining area is severely affected by large-scale blasting and is easily damaged by shock waves and flying rocks. It is also inconvenient to switch on / off and install monitoring equipment, as the monitors are easily damaged by the blast shock waves. Additionally, excessively long spraying times easily lead to muddy and impassable surfaces at the ore outlet, severely impacting ore extraction efficiency, increasing equipment failure rates, wasting water resources, and causing ore powder loss. Conversely, excessively short spraying times result in insufficient ore penetration and poor dust removal. Utility Model Content

[0004] To address the aforementioned issues, this utility model proposes a spray dust suppression system for ore extraction routes in underground mines. This system uses vertical spray pipes to precisely suppress dust rising from the top of the ore pile, and inclined spray pipes to block lateral dust diffusion, achieving multi-dimensional, three-dimensional dust suppression coverage.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A dust suppression spray system for the ore extraction access route in an underground mine includes:

[0007] The circulating water system consists of a main pipe and an outflow pipe connected in parallel to the water supply system, and several branch pipes spaced apart between adjacent ore piles. The two ends of the branch pipes are respectively connected to the main pipe and the outflow pipe, and are arranged along the upper part of the outer side of the ore pile.

[0008] The multi-directional spray assembly includes a central spray pipe vertically mounted on a branch pipe and inclined spray pipes symmetrically distributed at both ends of the central spray pipe. The spray end of the central spray pipe points towards the top of the ore pile, and the inclined spray pipes are inclined horizontally or downward toward the outer surface of the ore pile. Each spray pipe is equipped with an atomizing nozzle at its end.

[0009] Furthermore, it also includes an intelligent control module, which consists of a closed-loop control system composed of solenoid valve groups located on the central nozzle and the inclined nozzles, a water level sensor at the bottom of the ore pile, a PLC controller, and a wireless communication unit.

[0010] Furthermore, it also includes an adjustable suspension mechanism, which includes a fixing plate with expansion bolts. The fixing plate is fixed to each branch pipe by a telescopic positioning rod and a collar to fix the entire pipeline assembly to the top plate of the inlet.

[0011] Furthermore, the inclined nozzles are symmetrically arranged with the center line of the ore pile as the reference, the distance between adjacent nozzles is 0.8-1.2m, the spray coverage angle is ≥120°, and the nozzle axis forms an angle of 45-60° with the normal to the surface of the ore pile.

[0012] Furthermore, the solenoid valve assembly includes a central nozzle solenoid valve and a tilting nozzle solenoid valve.

[0013] Furthermore, the outflow pipe is equipped with a proportional regulating valve, the opening of which is negatively correlated with the number of working branch pipes, and dynamic flow balance is achieved through feedback from a differential pressure sensor.

[0014] Furthermore, the water level sensor is a capacitive liquid level detection device.

[0015] Furthermore, the wireless communication unit adopts an explosion-proof mesh network structure.

[0016] Furthermore, the positioning rod of the adjustable suspension mechanism includes a threaded adjustment section, and the fixing plate is made of Q235B steel plate and is anchored by M12×80 expansion bolts.

[0017] Furthermore, the central nozzle and the inclined nozzle are made of seamless 316L stainless steel tubing.

[0018] Beneficial effects: This utility model uses vertical nozzles to precisely suppress dust on the top of the ore pile and inclined nozzles to block lateral dust diffusion, achieving multi-dimensional three-dimensional dust suppression coverage; it greatly improves the efficiency of ore pile wetting and penetration, so that both the outside and inside of the ore pile can be wetted, and at the same time, it greatly reduces the generation of dust in the subsequent ore extraction. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the underground mine access spray dust suppression system described in this embodiment of the invention. Figure 1 ;

[0021] Figure 2 This is a top view of the underground mine access spray dust suppression system described in this embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the underground mine access spray dust suppression system described in this embodiment of the invention. Figure 2 . Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] See Figure 1-3 A dust suppression spray system for ore extraction access in an underground mine, comprising:

[0027] The circulating water system consists of a main pipe 1 and an outlet pipe 6 connected in parallel to the water supply system, and several branch pipes 5 spaced apart between adjacent ore piles 3. The two ends of the branch pipes 5 are respectively connected to the main pipe 1 and the outlet pipe 6, and are arranged along the upper part of the outer side of the ore pile.

[0028] The multi-directional spray assembly includes a central spray pipe 4 vertically mounted on a branch pipe 5 and inclined spray pipes 7 symmetrically distributed at both ends of the central spray pipe 4. The spray end of the central spray pipe 4 points towards the top of the ore pile, and the inclined spray pipes 7 are inclined horizontally or downward toward the outer surface of the ore pile. Each spray pipe is equipped with an atomizing nozzle at its end.

[0029] This embodiment uses vertical nozzles to precisely suppress dust rising from the top of the ore pile, and inclined nozzles to block lateral dust diffusion, achieving multi-dimensional three-dimensional dust suppression coverage. This greatly improves the efficiency of wetting and penetration of the ore pile, allowing both the outside and inside of the ore pile to be wetted. At the same time, this greatly reduces dust generation during subsequent ore extraction.

[0030] In a specific example, it also includes an intelligent control module, which consists of a closed-loop control system composed of solenoid valve groups located on the central nozzle 4 and the inclined nozzle 7, a water level sensor at the bottom of the ore pile, a PLC controller, and a wireless communication unit.

[0031] This embodiment uses a water level sensor to detect whether there is water on the ground. The PLC controller can then control the opening and closing of the solenoid valve according to the actual situation, spraying water onto the ore pile to reduce the dust that has settled on the pile. This greatly improves ore extraction efficiency, working environment, reduces equipment failure rate, and enhances occupational health and safety.

[0032] In a specific example, an adjustable suspension mechanism is also included, which includes a fixing plate 2 with expansion bolts. The fixing plate 2 is fixed to each branch pipe 5 by a telescopic positioning rod and a collar to fix the entire pipeline assembly to the top plate of the inlet.

[0033] The adjustable suspension mechanism in this embodiment adapts to the undulations of the roadway roof, and its seismic performance meets the requirements of MT 113-1995 "Technical Requirements for Impact Resistance of Underground Equipment in Coal Mines".

[0034] In a specific example, the inclined nozzles 7 are arranged symmetrically with the center line of the ore pile as the reference, the distance between adjacent nozzles is 0.8-1.2m, the spray coverage angle is ≥120°, and the nozzle axis forms an angle of 45-60° with the normal to the surface of the ore pile.

[0035] This embodiment achieves: precise coverage design: the 45-60° nozzle tilt angle allows the water mist to effectively reach the surface of the ore pile, reducing the spray blind zone area by 78% (compared to traditional single nozzle systems);

[0036] Dynamic adjustment capability:

[0037] The adjustable spacing of 0.8-1.2m matches different ore pile sizes (1.5-3m width) and adapts to the diverse operating scenarios in Article 6.2.3 of the "Safety Regulations for Metal and Non-metal Mines".

[0038] In a specific example, the solenoid valve group includes a central nozzle solenoid valve and a tilting nozzle solenoid valve, the opening and closing states of which are controlled by the PWM signal output by the PLC controller, with a response time of <200ms.

[0039] The response time of the PWM signal-controlled solenoid valve is less than 200ms, which is 3 times faster than that of the traditional solenoid valve, meeting the emergency response requirements of AQ 1028-2006 "Coal Mine Dust Prevention and Control Standard".

[0040] In a specific example, the outflow pipe 6 is equipped with a proportional regulating valve, the opening of which is negatively correlated with the number of working branches 5, and dynamic flow balance is achieved through feedback from a differential pressure sensor.

[0041] Intelligent pressure regulation

[0042] The proportional control valve (6.1) automatically compensates for the pressure difference according to the number of working nozzles, keeping the system pressure stable at 0.4-0.6MPa (as required by GB 50898-2013).

[0043] Explosion-proof pipe protection

[0044] Dynamic flow balancing ensures that the pressure fluctuation of the pipeline is less than 5%, effectively preventing the overpressure risk that is expressly prohibited by MT 199-1996 "Safety Specifications for Mine Pressure Pipelines".

[0045] In a specific example, the water level sensor 8 is a capacitive liquid level detection device, installed at a height of 150-200mm from the tunnel floor. When the water level is detected to exceed the set threshold, a three-level warning is triggered: the first level warning reduces the injection pressure, the second level warning closes 50% of the nozzle, and the third level warning cuts off the water supply.

[0046] In a specific example, the wireless communication unit adopts an explosion-proof mesh network structure, including an intrinsically safe transmitter and receiver for mining, and operates in a dual-mode adaptive switching frequency band of 2.4GHz / 5.8GHz, with a signal relay interval of ≤30m.

[0047] In a specific example, the positioning rod of the adjustable suspension mechanism includes a threaded adjustment section with an adjustment stroke of 300-500mm. The fixing plate 2 is made of Q235B steel plate and is anchored by M12×80 expansion bolts with a pull-out force ≥15kN.

[0048] In a specific example, the central nozzle 4 and the inclined nozzle 7 are made of seamless 316L stainless steel tubes with a wall thickness of 2.5-3mm and an inner surface that has been electrolytically polished to a roughness Ra≤0.8μm.

[0049] The specific working process of this utility model is as follows:

[0050] Taking the TZ104 mining area at -650 to -585 meters as an example, starting from the main pipeline in the middle level roadway at -650 meters, 1-inch steel pipes are laid along the sidewall of the ore exit roadway from the outside to the inside until the last entrance. Then, solenoid valve one and solenoid valve two are installed on the branch pipes at each entrance. Atomizing nozzles are installed at the ends of nozzle one 4 and nozzle two 7, and the angle is adjusted to spray towards the ore gate line.

[0051] The system uses a water level sensor to detect the presence of water on the ground. When the water level exceeds a set threshold, a three-level warning system is triggered: Level 1 reduces the spray pressure, Level 2 shuts off 50% of the spray nozzles, and Level 3 cuts off the water supply. Through a PLC controller, the system wirelessly controls the solenoid valve to disconnect and, in conjunction with the proportional regulating valve on the outflow pipe, adjusts the spray to reach the ore pile, reducing dust. This also saves water, significantly improving ore extraction efficiency, the working environment, reducing equipment failure rates, and enhancing occupational health and safety. When water spraying is needed again, i.e., when the water level sensor no longer alarms, the spraying process is restarted. The PLC controller can be placed in the control room or in a convenient location. The water level sensor, solenoid valve, and other components not directly connected to the spray system are not shown in the attached diagrams.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust suppression spray system for ore extraction access routes in underground mines, characterized in that, include: The circulating water system consists of a main pipe (1) and an outlet pipe (6) connected in parallel to the water supply system, and several branch pipes (5) spaced apart between adjacent ore piles (3). The two ends of the branch pipes (5) are connected to the main pipe (1) and the outlet pipe (6) respectively, and are arranged along the upper part of the outer side of the ore pile. The multi-directional spray assembly includes a central spray pipe (4) vertically arranged on a branch pipe (5) and inclined spray pipes (7) symmetrically distributed at both ends of the central spray pipe (4). The spray end of the central spray pipe (4) points to the top of the ore pile, and the inclined spray pipes (7) are inclined horizontally or downward toward the outer surface of the ore pile. Each spray pipe is equipped with an atomizing nozzle at its end.

2. The dust suppression spray system for underground mine access routes according to claim 1, characterized in that: It also includes an intelligent control module, which consists of a closed-loop control system composed of a solenoid valve group located on the central nozzle (4) and the inclined nozzle (7), a water level sensor at the bottom of the ore pile, a PLC controller and a wireless communication unit.

3. The dust suppression spray system for underground mine access routes according to claim 1, characterized in that: It also includes an adjustable suspension mechanism, which includes a fixing plate (2) with expansion bolts. The fixing plate (2) is fixed to each branch pipe (5) by a telescopic positioning rod and a collar to fix the entire pipeline assembly to the top plate of the inlet.

4. The dust suppression spray system for underground mine access routes according to claim 1, characterized in that: The inclined nozzles (7) are arranged symmetrically with the center line of the ore pile as the reference, the distance between adjacent nozzles is 0.8-1.2m, the spray coverage angle is ≥120°, and the nozzle axis forms an angle of 45-60° with the normal of the ore pile surface.

5. The dust suppression spray system for underground mine access routes according to claim 2, characterized in that: The solenoid valve assembly includes a central nozzle solenoid valve and a tilting nozzle solenoid valve.

6. The dust suppression spray system for underground mine access routes according to claim 1, characterized in that: The outflow pipe (6) is equipped with a proportional regulating valve, the opening degree of which is negatively correlated with the number of working branches (5), and dynamic flow balance is achieved through feedback from the differential pressure sensor.

7. The dust suppression spray system for underground mine access routes according to claim 2, characterized in that: The water level sensor is a capacitive liquid level detection device.

8. The underground mine access road spray dust suppression system according to claim 2, characterized in that: The wireless communication unit adopts an explosion-proof Mesh network structure.

9. The dust suppression spray system for underground mine access routes according to claim 3, characterized in that: The positioning rod of the adjustable suspension mechanism includes a threaded adjustment section, and the fixing plate (2) is made of Q235B steel plate and is anchored by M12×80 expansion bolts.

10. The dust suppression spray system for the ore extraction route in an underground mine as described in claim 1, characterized in that: The central nozzle (4) and the inclined nozzle (7) are made of 316L stainless steel seamless tubes.

Images