Blasting funnel test experimental device

Abstract

The utility model relates to a blasting funnel test experiment device, which comprises an upper box body and a lower box body which are connected with each other, a similar experiment site is arranged in the lower box body, a blasting cartridge bag is embedded in the similar experiment site, and a detection device capable of lifting and transversely and longitudinally moving is arranged in the upper box body. The device is favorable for testing whether blasting is throwing blasting or loosening blasting, manpower and material resources are saved, and data guidance is provided for blasting before blasting.

Description

Technical Field

[0001] The utility model relates to a blasting funnel test experimental device. Background Art

[0002] The blasting funnel is a basic form of blasting destruction. When a semi-infinite rock medium with only one horizontal free surface explodes in the rock, in addition to breaking the rock, it will also throw out part of the broken rock, forming a funnel-shaped pit on the surface. This pit is the blasting funnel.

[0003] As an important means of breaking rocks, blasting is widely used in engineering, making rock blasting and breaking an important research topic in mining, water conservancy, railways and other engineering construction. In the long-term blasting production practice, due to the complex characteristics of rock heterogeneity and anisotropy, as well as the influence of complex factors such as high temperature, high pressure and high speed generated by the explosion reaction, people have considerable difficulties in recognizing and understanding the blasting and breaking of rocks. Therefore, the study of blasting funnel theory has become a window for people to understand the mechanism of rock blasting damage and has received widespread attention. For quite a long time, researchers' research on the mechanism of blasting and breaking rocks has mostly been based on funnel blasting tests and theoretical analysis, and the blasting design based on the empirical formula of the blasting funnel or based on the on-site blasting funnel test still plays a guiding role in engineering blasting.

[0004] The existing blasting funnel test method is simple to operate and widely used in engineering. However, most blasting funnel tests are carried out in the on-site blasting area, which requires a lot of manpower and financial resources for multiple measurements, and it is difficult to guide the blasting charge before blasting, which is costly. At the same time, due to factors such as equipment and on-site test environment, there are errors in the test data. In most cases, blasting is guided by the experience of on-site technicians and lacks test data guidance. Utility Model Content

[0005] The utility model aims to provide a blasting funnel test experimental device, which is helpful to test whether the blasting is a throwing blasting or a loose blasting, saves manpower and material resources, and provides data guidance for the blasting before the blasting.

[0006] The technical solution of the utility model is: a blasting funnel test experimental device, comprising an upper box body and a lower box body connected to each other, wherein a similar experimental site is arranged in the lower box body, a blasting charge is buried in the similar experimental site, and a detection device capable of lifting and lowering and moving horizontally and vertically is arranged in the upper box body.

[0007] Furthermore, the upper box body and the lower box body are both made of transparent plastic, and the upper box body and the lower box body are connected via buckles.

[0008] Furthermore, vertical slide rails are vertically arranged on both sides of the lower portion of the lower box body.

[0009] Furthermore, plastic pipes are vertically buried in the similar experimental site to form reserved blastholes.

[0010] Furthermore, the plastic tube is a transparent plastic tube.

[0011] Furthermore, longitudinal guide rails are arranged on both sides of the top of the upper box body, a transverse slide bar is arranged between the two longitudinal guide rails, and rollers matching with the longitudinal guide rails are arranged at both ends of the transverse slide bar.

[0012] Furthermore, the detection device is slidably mounted on the transverse sliding rod.

[0013] Furthermore, a plurality of ventilation holes are arranged at intervals on the four side walls around the upper portion of the upper box body.

[0014] Furthermore, the detection device comprises a detection display, a liftable connecting rod is installed at the lower side of the detection display, and a detector body is installed at the lower end of the connecting rod.

[0015] Compared with the prior art, the utility model has the following advantages: the device has a simple and compact structure, is helpful for testing blasting as throwing blasting or loosening blasting, saves manpower and material resources, and provides data guidance for blasting before blasting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a front view of the utility model;

[0018] Figure 3 This is a schematic diagram showing the matching structure of the longitudinal guide rail and the transverse slide bar of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the transverse slide bar of the utility model;

[0020] In the figure: 1-upper box 2-lower box 3-joining buckle 4-similar experimental site 51-longitudinal guide rail 52-lateral slide bar 53-roller 6-vertical slide rail 7-exhaust hole 8-detection display 9-connecting rod 10-detector 11-reserved gun hole 12-transparent plastic tube 13-powder bag. DETAILED DESCRIPTION

[0021] In order to make the above features and advantages of the present invention more understandable, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0022] refer to Figures 1 to 4

[0023] A blasting funnel test experimental device includes an upper box 2 and a lower box 1 connected to each other, wherein the upper box and the lower box are both rectangular boxes, thus forming a cubic device of 1.5m×1.5m×1.5m. A similar experimental site 4 is arranged in the lower box, and a blasting charge 13 is buried in the similar experimental site, and specific explosives are selected according to the on-site conditions. A detection device capable of lifting and lowering and moving horizontally and vertically is arranged in the upper box. To facilitate energy transfer, a plurality of ventilation holes 7 are arranged on the four side walls of the upper part of the upper box to facilitate ventilation and avoid detonation airflow.

[0024] In this embodiment, six ventilation holes are opened on the four sides of the upper box body (here only one side of the ventilation holes is drawn because drawing all of them will easily lead to a messy diagram), and the holes are positioned at the top to prevent blasting objects from being thrown out of the box body and ensure the safety of the experimenters.

[0025] In this embodiment, the upper box body and the lower box body are both made of a relatively strong transparent plastic, such as polytetrafluoroethylene, so as to avoid damage to the device due to vibration. To ensure safety, the top of the transparent upper box body is sealed.

[0026] In this embodiment, the upper box body and the lower box body are connected via a buckle 3, so as to facilitate the disassembly and assembly of the upper box body.

[0027] In this embodiment, both sides of the lower part of the lower box are vertically provided with vertical slide rails 6. In the experiment, after the lower box is placed, it is placed into the test site layer by layer along the vertical slide rails.

[0028] In this embodiment, the similar experimental site is composed of layers stacked according to the on-site conditions and the rock similarity ratio. (Note: The rock layer similarity ratio refers to the existing conclusions, such as the similarity ratio mentioned in "Guo Lijun. Research on Similar Simulation Experiment of Composite Coal Seam Mining [J]. Coal, 2024, 33(02): 98-101.")

[0029] In this embodiment, a plastic tube 12 is vertically buried in the similar experimental site to form a reserved blasthole 11. The plastic tube is a transparent plastic tube with two specifications of 8mm and 20mm in diameter, wherein 8mm corresponds to shallow hole blasting and 20mm corresponds to deep hole blasting. When constructing a similar site layer by layer, a transparent plastic tube is placed at this position to reserve a blasthole for subsequent charging.

[0030] In this embodiment, longitudinal guide rails 51 are provided on both sides of the top of the upper box body. A transverse sliding rod 52 is arranged between the two longitudinal guide rails. Roller wheels 53 that cooperate with the longitudinal guide rails are provided at both ends of the transverse sliding rod to facilitate the longitudinal movement of the transverse sliding rod. The detection device is slidably mounted on the transverse sliding rod to facilitate the left-right movement and position adjustment of the detection device, thereby facilitating the detection of the positions of the explosive packages at each corner and the shape of the blasting funnel.

[0031] In this embodiment, the detection device includes a detection display 8, which indicates the detection situation: the depth of the explosive package burial (i.e., the minimum resistance line W) is measured before blasting, and the blasting funnel radius r is measured after blasting. A liftable connecting rod 9 is installed on the lower side of the detection display to facilitate adaptation to different height situations; a detector body 10 is installed at the lower end of the connecting rod, which includes a radar transmitter and a radar receiver, can detect the situation under the surface of the experimental site, and feedback the situation to the display.

[0032] In the experiment, the three elements of the blasting funnel are: the minimum resistance line W, the blasting funnel radius r, and the blasting action radius R. The blasting action index n is the ratio of the blasting funnel radius r to the minimum resistance line W, that is, n = r / W; n = 1 is standard throwing blasting, n > 1 is enhanced throwing blasting, 0.75 < n < 1 is weakened throwing blasting; n ≤ 0.75 is loosening blasting.

[0033] The usage method of this device:

[0034] 1. On-site sampling: Sample the rock at the blasting site to determine the type and properties of the rock. According to the properties of the on-site rock and the existing similar rock ratios, if the on-site is soil, directly use the soil, and build a similar site in a 100:1 ratio layer by layer. At the same time, leave a hole at the place where blasting is required.

[0035] 2. Loading gunpowder: Burry spherical explosive packages in the reserved holes. The position of the explosive packages is about 0.5 m from the surface of the test site. Then pull out the fuse above the surface of the test site to facilitate subsequent detonation. After plugging is completed, cover the upper transparent cover.

[0036] 3. Position detection: Push the detector and record the data of the test site and the position of the explosive package (minimum resistance line W).

[0037] 4. Detonate the explosive package and data analysis: Detonate the explosive package. After the vibration stops, push the detector, record the size of the blasting funnel (blasting funnel radius r), judge the type of the blasting funnel, and analyze the explosive power according to the amount of explosives and the properties of the rock, so as to guide the on-site blasting.

[0038] 5. Clean the experimental equipment: remove the upper box, introduce some water to the blasting location to prevent the explosive pack from completely exploding. After the treatment is completed, pour similar experimental sites into the treatment box, and treat them uniformly after subsequent multiple tests. Clean the lower experimental box and dry it before the next experiment.

[0039] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the fixed connection to each other can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0040] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0041] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0042] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A bursting funnel test experimental device, comprising an upper box body and a lower box body connected to each other, characterized in that: A similar experimental site is arranged in the lower box body, blasting charges are buried in the similar experimental site, and a detection device capable of being raised and lowered and moved horizontally and vertically is arranged in the upper box body.

2. The bursting funnel test experimental device according to claim 1, characterized in that: The upper box body and the lower box body are both made of transparent plastic, and the upper box body and the lower box body are connected via buckles.

3. A bursting funnel test experimental device according to claim 1 or 2, characterized in that: Vertical slide rails are vertically arranged on both sides of the lower part of the lower box body.

4. The bursting funnel test experimental device according to claim 1, characterized in that: Plastic pipes are vertically buried in the similar experimental site to form reserved blast holes.

5. The bursting funnel test experimental device according to claim 4, characterized in that: The plastic tube is a transparent plastic tube.

6. A bursting funnel test experimental device according to claim 1, 2, 4 or 5, characterized in that: Both sides of the top of the upper box body are provided with longitudinal guide rails, a transverse slide bar is provided between the two longitudinal guide rails, and both ends of the transverse slide bar are provided with rollers matched with the longitudinal guide rails.

7. The bursting funnel test experimental device according to claim 6, characterized in that: The detection device is slidably mounted on the transverse sliding rod.

8. A bursting funnel test experimental device according to claim 1 or 7, characterized in that: A plurality of ventilation holes are arranged at intervals on the side walls surrounding the upper portion of the upper box body.

9. A bursting funnel test experimental device according to claim 1 or 7, characterized in that: The detection device comprises a detection display, a lifting and lowering connecting rod is installed on the lower side of the detection display, and a detector body is installed on the lower end of the connecting rod.

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