Funnel device for assisting ammonium nitrate fuel oil explosive mixing and charging truck in open blast hole charging

Abstract

The utility model discloses a funnel device for assisting an ammonium nitrate fuel oil explosive mixed loading truck in loading explosives in open blast holes. The funnel device comprises a carrying handle and a drainage box body, the device is simple in principle, high in operability and practicability, and capable of overcoming the defects of explosive waste, weakened blasting effect, large potential safety hazards and the like caused by the fact that the length of a charging hose of a traditional ammonium nitrate fuel oil explosive mixed charging truck is limited. The blast hole charging funnel is used for assisting the charging hose of the ammonium nitrate fuel oil explosive mixing and charging truck in blast hole charging, so that granular ammonium nitrate fuel oil explosives can be completely drained to the hole bottom of an open blast hole while safety is guaranteed, explosive waste is avoided, the blasting effect can be further enhanced, safety risks caused by explosive scattering are avoided, and the safety of the blast hole is improved. And high economic benefits and social benefits are brought to enterprises.

Description

Technical Field

[0001] This utility model belongs to the field of open-pit blasting technology, specifically relating to a funnel device for assisting ammonium nitrate explosive mixing vehicles in loading explosives into open-pit blast holes. Background Technology

[0002] In open-pit mine blasting operations, manual loading of explosives into the blast holes is often the primary method. When the blasting area is large, dozens of people may be simultaneously loading explosives into the holes. Manual loading is inefficient, and because mine blasting is a high-risk operation, the potential safety risks pose a significant threat to the lives of the loading personnel. With technological advancements, in waterless open-pit mines, ammonium nitrate (AM) explosive loading vehicles are increasingly replacing manual loading of explosives into the blast holes. This significantly improves on-site loading efficiency and, by reducing the number of personnel involved, further reduces the threat to personnel safety during blasting operations.

[0003] While using ammonium nitrate explosive (AMF) mixed-loading vehicles for borehole loading offers advantages in terms of efficiency, it also presents other challenges due to incompatibility with operational needs. For instance, to mitigate the risk of electrostatic explosions caused by excessively long loading hoses rubbing against the ground during vehicle operation, manufacturers typically limit the length of the loading hoses (the vertical length is generally slightly longer than the vehicle height). Therefore, during borehole loading, ground personnel can only insert the hose end into the first row of boreholes surrounding the vehicle for opening loading. When the hose is aligned with the second row or outer boreholes, the limited hose length prevents the precise and complete filling of the borehole with granular AMF. This results in some AMF spilling around the borehole opening, wasting explosives, weakening the blasting effect, and posing significant safety risks to personnel and equipment. Utility Model Content

[0004] This utility model provides a funnel device to assist an ammonium nitrate explosive (ANFO) mixing vehicle in loading explosives into open-pit blast holes. The technical problem to be solved is to overcome the drawbacks of traditional ANFO mixing vehicles, such as the waste of explosives, weakened blasting effect, and greater safety hazards caused by the limited length of the loading hose.

[0005] To solve the above technical problems, this utility model provides a funnel device for assisting an ammonium nitrate explosive mixing vehicle in loading explosives into open-pit boreholes. The device is characterized by including a handling handle and a diversion box, with the handling handle fixed to one side of the diversion box. The diversion box is composed of a funnel baffle, a funnel diversion section, and an embedding section connected in sequence, with the embedding section embedded into the borehole.

[0006] Beneficial effects: This utility model utilizes a borehole charging funnel to assist the charging hose of an ammonium nitrate explosive (AMF) mixing vehicle in loading explosives into boreholes. While ensuring safety, it allows all granular AMF explosives to be channeled to the bottom of the open borehole, avoiding explosive waste, further enhancing the blasting effect, and mitigating the safety risks associated with explosive spillage. This brings significant economic and social benefits to enterprises. The principle is simple, and it is highly operable and practical. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the present invention.

[0008] In the diagram: 1. Handling handle; 2. Drainage box; 3. Open-pit blast hole; 4. Rock powder at the blast hole opening; 5. Drainage angle of the funnel α; 6. Radius of the funnel baffle R1; 7. Drainage radius of the funnel R2; 8. Radius of the open-pit blast hole R3; 9. Depth of the funnel embedded in the blast hole H1; 10. Height of the funnel baffle H2; 11. Height of the handling handle H3. Detailed Implementation

[0009] To make the purpose, content and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below.

[0010] This utility model proposes a funnel device for assisting ammonium nitrate explosive mixing vehicles in loading explosives into open-pit boreholes. The device includes a handling handle 1 and a diversion box 2. The handling handle is fixed to one side of the diversion box. The diversion box is composed of a funnel baffle, a funnel diversion section and an embedding section connected in sequence. The handling handle is fixed to one side of the funnel baffle.

[0011] The funnel device is made of bulletproof material that can prevent static electricity from being generated by friction.

[0012] Preferably, the detonation radius R1 of the funnel baffle is set in the range of 20cm to 30cm; the drainage radius R2 of the funnel embedded section should be slightly smaller than the radius R3 of the open-pit borehole by about 2mm.

[0013] Preferably, the funnel-shaped drainage section has a conical structure, and its drainage angle α is set in the range of 30° to 45°.

[0014] Preferably, the embedding depth H1 of the embedding section into the blast hole is set in the range of 20cm to 30cm; the height H2 of the funnel baffle is set in the range of 10cm to 20cm; and the height H3 of the handling handle is set to facilitate the movement of the charging funnel by operators of different heights for charging operations.

[0015] When using an ammonium nitrate explosive (AMFO) loading vehicle to load explosives into the second row or outermost boreholes around the vehicle, the loading funnel is aligned and inserted into the borehole opening. The ground loading personnel on the loading vehicle control the loading hose, aligning the end of the hose with the loading funnel. The operator on the loading vehicle uses the control platform in the driver's cab to spray granular AMFO from inside the vehicle into the loading funnel using high pressure. The funnel baffle prevents the granular AMFO from spilling outside the funnel, while the explosive is guided to the bottom of the borehole through the lower opening of the funnel, completing the loading operation for this borehole. By moving the loading funnel forward and backward in a straight line and using the carrying handles, this loading operation is repeated to complete the loading task for each row of boreholes.

[0016] The steps for using this utility model are as follows:

[0017] Step 1: First, when using the ammonium nitrate explosive loading vehicle to load explosives into the second row or outer perimeter of the blast holes around the vehicle, align and insert the blast hole loading funnel into the blast hole opening. The blast hole loading funnel is made of bulletproof material that can prevent the generation of static electricity from friction.

[0018] Step 2: Then, the ground loading personnel of the mixed loading vehicle control the loading hose to align the end of the loading hose with the loading funnel of the blast hole;

[0019] Step 3: Next, the operator on the mixed-load truck uses the control platform in the driver's cab to spray granular ammonium nitrate explosive from inside the truck bed into the blast hole loading funnel using high pressure. The funnel baffle prevents the explosive from spilling outside the funnel by blocking the granular ammonium nitrate explosive. At the same time, the explosive is guided to the bottom of the blast hole through the lower opening of the funnel, thus completing the loading operation of this blast hole.

[0020] Step 4: Finally, by moving the vehicle in a straight line back and forth, the charging funnel of the blast hole is moved using the handling handle. This charging process is repeated in sequence to complete the charging operation of each row of blast holes.

[0021] This invention is simple in principle, highly operable, and practical. It solves the problems of waste, weakened blasting effect, and significant safety hazards caused by the limited length of the loading hose in traditional ANFO (Ammonium Fry) explosive loading vehicles. This invention utilizes a borehole loading funnel to assist the loading hose of the ANFO explosive loading vehicle in loading explosives into the borehole. While ensuring safety, it allows all granular ANFO explosives to be diverted to the bottom of the open borehole, avoiding explosive waste, further enhancing the blasting effect, and mitigating the safety risks caused by explosive spillage. This brings significant economic and social benefits to enterprises.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A funnel device for assisting an ammonium nitrate explosive mixing vehicle in loading explosives into open-pit blast holes, characterized in that: It includes a handling handle and a diversion box. The handling handle is fixed to one side of the diversion box. The diversion box is composed of a funnel baffle, a funnel diversion section and an embedding section connected in sequence. The embedding section is embedded in the blast hole.

2. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The radius R1 of the funnel baffle is set within the range of 20cm to 30cm.

3. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The funnel device is made of bulletproof material that can prevent static electricity from being generated by friction.

4. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The drainage radius R2 of the funnel-embedded section is smaller than the radius of the open-pit blast hole.

5. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The drainage radius R2 of the funnel-embedded section is smaller than the radius R32mm of the open-pit blast hole.

6. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The funnel-shaped drainage section has a conical structure.

7. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 6, characterized in that: The inclination angle α of the funnel-shaped drainage section is set in the range of 30° to 45°.

8. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The embedding depth H1 of the embedding section is set in the range of 20cm to 30cm.

9. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The height H2 of the funnel baffle is set within the range of 10cm to 20cm.

10. The funnel device for loading explosives into open-pit blast holes using an auxiliary ammonium nitrate explosives mixing vehicle according to claim 1, characterized in that: The height H3 of the handling handle allows operators of different heights to move the charging funnel for convenient charging operations.

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