Blast hole blocking depth control device for open bench blasting

Abstract

The utility model discloses an open bench blasting hole blocking depth control device which is characterized in that the open bench blasting hole blocking depth control device comprises a blocking air bag and an air-entrapping device, the air-entrapping device comprises an air pipe, the air pipe is connected with the blocking air bag and inflates the blocking air bag, the air pipe is flexible and foldable, and the blocking air bag is inserted into an open bench blasting hole; scales are engraved on the surface of the air pipe, the blocking air bag comprises an air bag main body and an air nozzle, the air bag main body is flexible and deformable, and the air bag main body can be inflated until the surface of the air bag main body and the inner wall of a blast hole are extruded; the surface of the air bag main body is coated with a friction coating; wherein the depth of the blocking air bag entering the open bench blasting hole is controlled by controlling the using length of the air pipe. According to the blast hole blocking depth control device, the blast hole blocking depth can be strictly controlled within the design requirement, the design length of a blocking section can be accurately met, and the blocking quality of a blast hole is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of blasting hole plugging depth control. More specifically, the utility model relates to a kind of open-air bench blasting hole plugging depth control device. BACKGROUND

[0002] The plugging length of blast hole is an important part in open-air bench blasting construction, and the plugging of blast hole can avoid the leakage of explosive energy, so that the energy can fully act on the rock. The plugging length and quality directly affect the final blasting effect. Too long plugging length will lead to large blockiness of the plugged section of rock, which is not conducive to construction efficiency. Too short plugging length will cause "punching" problem, resulting in waste of explosive energy. Therefore, the plugging length of bench blasting hole is determined according to the rock stratum and blasting parameters on site, and strict implementation is required on site. In the traditional bench blasting construction method, the actual plugging depth of blast hole is controlled according to the experience of workers. In the actual construction process, the control precision of blast hole plugging depth is low, and it is difficult to ensure the design length. Moreover, the working level of workers varies, which ultimately affects the blasting effect.

[0003] Therefore, we propose a kind of open-air bench blasting hole plugging depth control device to solve the above problems. SUMMARY

[0004] To achieve these objects and other advantages according to the utility model, a preferred embodiment of the utility model provides an open-air bench blasting hole plugging depth control device, which comprises a plugging air bag and a gas filling device. The gas filling device comprises an air pipe connected to the plugging air bag to inflate the plugging air bag. The air pipe is flexible and foldable. The plugging air bag is inserted into the open-air bench blasting hole. The surface of the air pipe is marked with a scale. The plugging air bag comprises an air bag body and an air nozzle. The air bag body is flexible and deformable. The air bag body can be inflated to cause extrusion between its surface and the inner wall of the blast hole. The surface of the air bag body is coated with a friction coating.

[0005] The depth of the plugging air bag entering the open-air bench blasting hole is controlled by controlling the length of the air pipe used.

[0006] According to a preferred embodiment of the utility model, the air nozzle is a self-sealing air nozzle.

[0007] According to a preferred embodiment of the utility model, the friction coating is a high-strength friction coating.

[0008] According to a preferred embodiment of the utility model, the gas filling device further comprises a gas filling needle and a gas filling pump. The gas filling pump is connected to the gas filling needle through the air pipe, and the gas filling needle is connected to the air nozzle.

[0009] According to a preferred embodiment of the present application, the open-air bench blasting blast hole bottom is filled with explosives.

[0010] According to a preferred embodiment of the present application, the air pump is a portable air pump.

[0011] The present application has at least the following beneficial effects:

[0012] (1) Compared with the traditional method, the plug depth is determined according to the experience of workers, and the blast hole plug depth control device of the present application can strictly control the blast hole plug depth within the design requirement, and can accurately meet the design length of the plugging section, and ensure the plugging quality of the blast hole.

[0013] (2) The present application adopts high-pressure material air bag and surface high-strength friction coating, which can effectively prolong the action time of the blast gas in the blast hole, prevent the blast gas from overflowing too early, improve the energy utilization rate of the explosive, and improve the blasting effect.

[0014] (3) The present application has the advantages of simple structure, convenient use, solving the difficulty of vertical blast hole plugging, convenient construction, strong operability, reusable inflatable device structure, and certain economic efficiency.

[0015] Other advantages, objects and features of the present application will be embodied in part by the following description, and will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 The present application is a structure schematic view of the open-air bench blasting blast hole plug depth control device.

[0017] Fig. 2 The present application is a use schematic view of the open-air bench blasting blast hole plug depth control device. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the present application according to the description.

[0019] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0020] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.

[0021] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0022] As Figs. 1-2 shown, a preferred embodiment of the utility model provides an open-air bench blasting blasthole plugging depth control device, including plugging air bag and gas filling device, the gas filling device includes air pipe 5, the air pipe 5 connects the plugging air bag, and the plugging air bag is inflated, the air pipe 5 is flexible and foldable, and the plugging air bag is inserted into blasthole;The air pipe surface is engraved with a scale, the plugging air bag includes air bag body 1 and air cock 3, and the air bag body 1 is flexible and deformable, and the air bag body 1 can be inflated to the surface and the inner wall of blasthole extrusion;The surface of the air bag body 1 is coated with a friction coating.

[0023] Wherein, the length of the air pipe 5 is controlled to control the depth of the plugging air bag into the blasthole.

[0024] The air bag body 1 is made of flexible and deformable high-pressure material, which makes the air bag body 1 easily inserted into the blasthole when not inflated, and can adapt to blastholes of different shapes and sizes. When the air bag body 1 is inflated, it can fully expand until its surface is tightly extruded with the inner wall of the blasthole. More importantly, the surface of the air bag body 1 is coated with a friction coating, preferably a high-strength friction coating, which has strong friction. When the air bag body and the inner wall of the blasthole are extruded and contacted, the friction between the two can be greatly increased, effectively preventing the air bag from sliding or shifting in the blasthole. At the same time, the combination of high-pressure material air bag and surface high-strength friction coating can effectively prolong the action time of blast gas in the blasthole. In the blasting process, this structure can better block the blast gas from overflowing the blasthole too early, so that the energy generated by the explosion of the explosive can be more fully applied to the rock, thereby improving the energy utilization rate of the explosive and significantly improving the blasting effect.

[0025] The air tube is made of flexible and foldable material. This feature allows the air tube to be conveniently stored when not in use, reducing the occupied space and facilitating transportation and carrying. Meanwhile, clear scales are engraved on the surface of the air tube. These scales play an important role. The operator can accurately control the length of the air tube in use according to the design requirements of the hole plugging depth by observing the scales on the air tube. Since the air tube is connected to the plugging air bag, controlling the length of the air tube in use means that the depth of the plugging air bag into the hole can be accurately controlled. Compared with the traditional method of determining the plugging depth according to the experience of workers, the device can strictly control the hole plugging depth within the design requirements and accurately meet the design length of the plugging section, thereby ensuring the plugging quality of the blast hole and reflecting the significant advantage of high precision of the device.

[0026] In another technical solution, the air nozzle 3 is a self-closing air nozzle. A self-closing air nozzle is adopted. The unique feature of this air nozzle is that when the air filling device completes the inflation of the air bag body, the air nozzle will automatically close to prevent the leakage of the gas in the air bag. The self-closing air nozzle not only is convenient to operate, but also can ensure the stability of the air pressure in the air bag, thereby ensuring the reliability and stability of the plugging and further improving the quality of the hole plugging.

[0027] In another technical solution, the air filling device further comprises an inflation needle 4 and an inflation pump 7, the inflation pump 7 is connected to the inflation needle 4 through the air tube 5, and the inflation needle 4 is connected to the air nozzle 3.

[0028] In another technical solution, the inflation pump is a portable inflation pump. A portable inflation pump is adopted. Considering the complex on-site environment of open bench blasting operation, the equipment needs to have good mobility and convenience. The portable inflation pump is small in size and light in weight, and is convenient for the operator to carry and operate at any time on the construction site. It can quickly inflate the plugging air bag and improve the operation efficiency.

[0029] When performing open bench blasting operation, the specific implementation steps are as follows:

[0030] 1. According to the open bench blasting design, the holes are arranged and drilled, the holes are cleaned and inspected, and the hole plugging is completed.

[0031] 2. The explosive is filled at the bottom of the blast hole, the digital electronic detonator is simultaneously loaded during the explosive loading process, and the detonator wire is led out to the outside of the blast hole with a certain length reserved.

[0032] 3. The plugging air bag is slowly inserted into the blast hole. The operator carefully observes the scales on the surface of the air tube 5 according to the design requirements of the plugging depth, accurately adjusts the length of the air tube in use, and thereby ensures that the plugging air bag accurately reaches the predetermined plugging position in the blast hole.

[0033] 4, the inflation pump 7 is connected to the inflation needle 4 through the air pipe 5, and the inflation needle 4 is accurately inserted into the air cock 3 of the plugging air bag. Start the inflation pump 7, inflate the plugging air bag. With the continuous injection of gas, the air bag body 1 gradually expands until its surface is tightly pressed against the inner wall of the blast hole. Because the surface of the air bag body is coated with a high-strength friction coating, and the air cock is a self-sealing air cock, it can ensure that the air bag is stably fixed in the blast hole, preventing gas leakage and air bag displacement. After completing the inflation, turn off the inflation pump 7 and remove the air charging device.

[0034] 5, put in the stemming or rock debris, and use the blast hole stick to tamp it, complete the hole plugging and repeat steps 2-4 to complete the charging and plugging of all blast holes in bench blasting.

[0035] 6, connect the detonators of all blast holes to the blasting network, scan the digital electronic detonator to set the initiation network, evacuate the site, check the network, and then initiate the slag.

[0036] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A device for controlling the depth of stemming in a blast hole for bench blasting, characterised in that, The application relates to a blocking air bag and a gas filling device, wherein the gas filling device comprises a gas pipe which is connected to the blocking air bag, the gas pipe is flexible and foldable, the blocking air bag is inserted into an open bench blasting hole, a scale is engraved on the surface of the gas pipe, the blocking air bag comprises an air bag body and a gas nozzle, the air bag body is flexible and deformable, the air bag body can be inflated to be extruded by the surface and the inner wall of the blasting hole, and a friction coating is coated on the surface of the air bag body. The depth of the blocking air bag into the open bench blasting hole is controlled by controlling the length of the gas pipe.

2. The device for controlling the depth of stemming of blast holes for bench blasting according to claim 1, characterized in that, The gas nozzle is a self-closing gas nozzle.

3. The device for controlling the depth of stemming of blast holes for bench blasting according to claim 1, characterized in that, The friction coating is a high-strength friction coating.

4. The device for controlling the depth of stemming of blast holes for bench blasting according to claim 1, characterized in that, The gas filling device further comprises an inflation needle and an inflation pump, the inflation pump is connected to the inflation needle through the gas pipe, and the inflation needle is connected to the gas nozzle.

5. The device for controlling the depth of stemming of blast holes for bench blasting according to claim 1, characterized in that, Explosive is filled in the bottom of the open bench blasting hole.

6. The device for controlling the depth of stemming of blast holes for bench blasting according to claim 1, characterized in that, The inflation pump is a portable inflation pump.

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