Charging structure for blasting construction of granite mine for building

Abstract

The utility model relates to the technical field of charging structures, and discloses a charging structure for blasting construction of granite mines for buildings, which comprises a mine and a blast hole formed in the mine, and a charging structure body is arranged in the blast hole. According to the charging structure for blasting construction of the granite mine for the building, a special charging structure is adopted to crush rocks by utilizing the energy of explosive explosion and the shock wave principle, and the core idea is axial non-coupling charging, radial non-coupling charging and polyurethane foam filling; according to the axial non-coupling charging, a PVC hollow pipe is adopted in a blast hole to achieve middle air spacing, the gravity center of explosive is increased, and explosive energy is more evenly distributed, and according to the radial non-coupling charging, explosive cartridges with different diameters are arranged at different positions in the blast hole, and the explosive cartridges are a lower-section non-coupling grain and an upper-section non-coupling grain respectively. The maximum pressure during detonation is reduced by changing the radial decoupling degree of charge in the blast hole, the blasting boulder rate can be effectively controlled, and fine ore generated by excessive crushing of the ore screen is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of charge structures, and in particular to charge structures for blasting construction of granite mines used in construction. Background Art

[0002] Granite ore is a key raw material for finished sand and gravel used in construction. Both its raw ore and various crushed and processed sand and gravel materials are widely used in engineering construction. For example, raw ore serves as a key material for land reclamation projects, transportation and road infrastructure, and various building and structure infrastructure projects. After processing and crushing, it can be sieved into stone powder, machine-made sand, crushed stone aggregate, and other materials. These materials, as the foundational raw materials for concrete, play a vital role in the national economy and infrastructure.

[0003] Strictly controlling the size of blasting construction during mining can reduce mechanical secondary crushing, improve ore excavation efficiency, and reduce the frequency of crusher jams during crushing processing, which is of great significance.

[0004] With the rapid development of my country's infrastructure, the construction of large-scale pumped storage power stations, dock and port construction, industrial parks and industrial park construction, urbanization construction, high-speed railway and highway construction and other projects, the demand for different types of block stones and stone materials has also increased significantly. With the increase in output, the percentage of block stones or product materials produced by ordinary blasting construction technology cannot meet the needs of customers. Ordinary blasting construction technology has problems such as a high rate of large blocks on the surface, uneven block size, a high rate of powder ore inside the blast pile, and difficulty in excavation and selection. In order to solve the above problems, a charging structure for blasting construction of granite ore for construction is proposed. Utility Model Content

[0005] In response to the shortcomings of the existing technology, this application provides a charging structure for blasting construction of granite ore for construction, which optimizes the blasting effect and improves safety and efficiency through reasonable segmentation and air spacing.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a charging structure for blasting construction of granite mines for construction, comprising a mine and a blasthole opened inside the mine, a charging structure body being provided inside the blasthole, the charging structure body comprising a bottom reinforcing charge column located at the bottom and a digital detonator leg line located at the top, an explosive bag being installed inside the bottom reinforcing charge column, a lower uncoupled charge column being provided above the bottom reinforcing charge column, a PVC hollow tube being placed above the lower uncoupled charge column, the interior of the PVC hollow tube being filled with polyurethane foam, an upper uncoupled charge column being provided above the PVC hollow tube, and a filling area being provided on the top of the upper uncoupled charge column.

[0007] The scheme has the advantages that the energy released by the explosion of the explosive and the crushing effect of the shock wave generated in the explosion on the rock are used as the theoretical basis, the charge structure and the explosive amount are controlled, the axial decoupling charge is used in the blast hole, the intermediate air interval is realized through the PVC hollow pipe, the gravity center of the charge in the blast hole is improved, the purpose of uniform distribution of the explosive energy is achieved, two explosive coils with different diameters are loaded at different positions in the blast hole in the case of high large block rate of the packed area, namely, the lower decoupling charge column and the upper decoupling charge column, the radial decoupling degree of the charge in the blast hole is changed, the peak pressure at the moment of initiation is reduced, the blasting large block rate is controlled, the generation of ore screen over-crushed fine ore is reduced, the PVC hollow pipe can be more portable, flexible and economical through the filled polyurethane foam, and the blasting of the charge structure body can be more accurate

[0008] Further, the diameter of the blast hole is 115 mm, and the depth of the blast hole is 16.5 m.

[0009] Through the above scheme, the size of the blast hole is limited, and the design of the subsequent structure is facilitated.

[0010] Further, the bottom reinforcing charge column is filled in the bottom of the blast hole, and the length of the bottom reinforcing charge column is 2 m.

[0011] Through the above scheme, the coupling charge can be realized, and the purpose of reinforcing the charge is achieved.

[0012] Further, the distance between the detonating charge and the bottom of the blast hole is 1 m.

[0013] Through the above scheme, it can be ensured that the detonation point is closely combined with the bottom reinforcing charge column, so that the energy can act more directly on the bottom area.

[0014] Further, the length of the PVC hollow pipe is 3 m, the diameter of the PVC hollow pipe is 70 mm, and the outer surface of the PVC hollow pipe is provided with an anti-static layer.

[0015] Through the above scheme, the accidental risk caused by friction or operation can be reduced.

[0016] Further, the diameter of the explosive coil in the lower decoupling charge column is 90 mm, and the diameter of the explosive coil in the upper decoupling charge column is 70 mm.

[0017] Through the above scheme, the diameters of the lower decoupling charge column and the upper decoupling charge column are limited so that the decoupling charge structure can be formed in the blast hole.

[0018] Further, the sum of the lengths of the bottom reinforcing charge column and the lower decoupling charge column is not less than 6.1 m.

[0019] The sum of the length of the bottom reinforced charge column and the lower section uncoupled charge column can maintain the energy balance and transmission efficiency of the charge system, and meet the requirements of the chassis crushing and the base detonation.

[0020] Further, the filling area is filled with finished machine-made sand.

[0021] According to the above scheme, since the finished sand has a large specific gravity and a certain moisture content, the filling quality is improved, and the blasting effect is optimized.

[0022] Compared with the prior art, the technical scheme of the application has the following beneficial effects:

[0023] The charge structure for the granite mine blasting construction of the building uses a special charge structure to utilize the energy and shock wave principle of the explosion of the explosive to crush the rock, and the core idea is axial uncoupled charge, radial uncoupled charge and polyurethane foam filling. The axial uncoupled charge is achieved by using a PVC hollow tube to realize the air spacing in the middle of the blast hole, which improves the gravity center of the explosive, so that the energy of the explosive is more uniformly distributed. The radial uncoupled charge is achieved by loading explosive coils with different diameters at different positions in the blast hole, which are the uncoupled charge columns of the lower section and the upper section. By changing the radial uncoupling degree of the charge in the blast hole, the maximum pressure during initiation is reduced. This way can effectively control the blasting boulder rate and reduce the fine ore produced by excessive crushing of the ore screen. Finally, the polyurethane foam is filled into the PVC hollow tube, so that the charge structure is more portable and flexible, and the economy is also considered. The design of this charge structure not only ensures the blasting effect, but also more accurately controls the blasting quality, reduces the production of fine ore, improves the utilization rate of ore classification, and also reduces the construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic diagram of the structure of the application;

[0025] Figure 2 It is a whole structure schematic diagram of the structure of the application;

[0026] Figure 3 It is a whole structure schematic diagram of the structure of the application;

[0027] Figure 4 It is a whole structure schematic diagram of the structure of the application.

[0028] In the figure:

[0029] 1, mine; 2, blast hole; 3, charge structure body; 301, bottom reinforced charge column; 302, lower section uncoupled charge column; 303, PVC hollow tube; 304, upper section uncoupled charge column; 305, filling area; 306, digital detonator lead; 307, initiating explosive package; 308, polyurethane foam; 309, anti-static layer. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] See also Figure 1 and Figure 2 The charging structure for blasting construction of a granite mine for construction in this embodiment includes a mine 1 and a blasthole 2 opened inside the mine 1. The diameter of the blasthole 2 is 115 mm, and the depth of the blasthole 2 is 16.5 m. This limits the size of the blasthole 2 and facilitates the design of subsequent structures. A charging structure body 3 is provided inside the blasthole 2. The charging structure body 3 includes a bottom reinforcement column 301 located at the bottom and a digital detonator leg line 306 located at the top. The bottom reinforcement column 301 is filled at the bottom of the blasthole 2. The length of the bottom reinforcement column 301 is 2 m, which can achieve coupled charging. In order to overcome the chassis resistance line and ensure the charge amount at the bottom of the blasthole 2, the bottom 2 m of the blasthole 2 is reinforced. During charging, 90 mm of emulsion explosive is split and filled at the bottom of the blasthole 2, so that the distance of 2 m at the bottom of the blasthole 2 is coupled and charged, thereby achieving the purpose of reinforced charging.

[0032] See also Figure 2 、 Figure 3 and Figure 4, an explosive bag 307 is installed inside the bottom reinforcement charge column 301, and the distance between the explosive bag 307 and the bottom of the blasthole 2 is 1m, which can ensure that the detonation point is closely combined with the bottom reinforcement charge column 301, so that the energy acts more directly on the bottom area, and the detonator energy-gathering hole is facing the hole mouth, and a reverse detonation method is adopted to improve the detonation effect. At the same time, the inside of the blasthole 2 is guaranteed to have at least two digital electronic detonators, and the network connection adopts a hole-by-hole detonation network. A lower section uncoupled charge charge column 302 is provided above the bottom reinforcement charge column 301, and a PVC hollow tube 303 is placed above the lower section uncoupled charge charge column 302. The length of the PVC hollow tube 303 is 3m, and the diameter of the PVC hollow tube 303 is 70mm. The interior of the PVC hollow tube 303 is filled with polyurethane foam 308. By filling the polyurethane foam 308, the blasthole 2 is filled with polyurethane foam 308. 8 can make the PVC hollow tube 303 lighter, easier to carry and operate during construction, especially in deep holes or large-scale filling operations. The filled polyurethane foam 308 can also improve the flexibility of the PVC hollow tube 303, adapt to the irregular shape of the blast hole 2, and avoid breakage due to excessive rigidity. At the same time, the combined cost of the PVC hollow tube 303 and the polyurethane foam 308 is usually lower than that of completely solid PVC material, which is more economical when a large number of spacer columns are required. Finally, the filled polyurethane foam 308 can better isolate energy, reduce interference between the upper and lower sections of the explosive column, enhance the blasting directionality, and perform better when precise control of the blasting is required. The outer surface of the PVC hollow tube 303 is provided with an anti-static layer 309. The anti-static layer 309 can reduce the risk of accidents caused by friction or operation.

[0033] See also Figure 2 An upper uncoupled charge column 304 is provided above the PVC hollow tube 303. A filling area 305 is provided at the top of the upper uncoupled charge column 304. The diameter of the explosive roll in the lower uncoupled charge column 302 is 90 mm, and the diameter of the explosive roll in the upper uncoupled charge column 304 is 70 mm. By limiting the diameters of the lower uncoupled charge column 302 and the upper uncoupled charge column 304, an uncoupled charge structure can be formed in the blasthole 2. The sum of the lengths of the bottom reinforcement column 301 and the lower uncoupled charge column 302 is not less than 6.1 m. By limiting the sum of the lengths of the bottom reinforcement charge 301 and the lower uncoupled charge charge 302, the energy balance and transfer efficiency of the charge system can be maintained, meeting the requirements of chassis crushing and base detonation. Loading 70mm explosives above the PVC hollow tube 303 may result in insufficient charge. To increase the upper charge amount and raise the charge center of gravity and reduce the filling height, the filling area 305 is filled with finished machine-made sand. Because the finished sand has a high specific gravity and a certain amount of moisture, the filling quality is improved and the blasting effect is optimized. The filling height has now been reduced to 3m, and no blasting or flying rocks have occurred.

[0034] It should be noted that the conclusion that the sum of the lengths of the bottom reinforcement charge 301 and the lower uncoupled charge charge 302 is not less than 6.1 m is based on the theoretical research results on the length of the air interval segment. The air layer ratio formula is Ra=La / La+Le. For the lower charge of the segmented charge, it still cannot exceed the upper limit of Ra of 33%, and the explosive rolls used in this structure are all emulsion explosives.

[0035] In this embodiment, the charge structure for blasting granite ore for construction utilizes the energy released by explosive explosions and the rock-crushing effect of the shock wave generated during the explosion as its theoretical basis. By controlling the charge structure and explosive quantity, an axially uncoupled charge is used in the blasthole 2. An air gap is created through the PVC hollow tube 303, which increases the charge center of gravity in the blasthole 2 and achieves uniform distribution of explosive energy. To address the high rate of large blocks in the filling area 305, two types of explosive rolls with different diameters, namely, a lower uncoupled charge column 302 and an upper uncoupled charge column 304, are loaded at different positions in the blasthole 2. This changes the radial uncoupling degree of the charge in the blasthole 2, reduces the peak pressure at the moment of detonation, thereby controlling the rate of large blocks and reducing the generation of fine ore caused by excessive crushing of the ore screen. In addition, the polyurethane foam 308 filling the PVC hollow tube 303 makes it more lightweight, flexible, and economical, and also enables more precise blasting of the charge structure body 3.

[0036] The working principle of the above embodiment is as follows: the area of ​​2m at the bottom of the blasthole 2 adopts the method of reinforced charging. When charging, the 90mm emulsion explosive is split and filled into the bottom of the blasthole 2 by quantitative filling equipment to ensure that the charge column is dense and accurately positioned, realize coupled charging, and form a bottom reinforced charge column 301. In the process of filling the bottom reinforced charge column 301, the detonator bag 307 needs to be buried therein, and the distance between the detonator bag 307 and the bottom of the blasthole 2 is 1m. The detonator energy-gathering hole faces the hole mouth, and the reverse detonation method is used as much as possible. The lower section uncoupled charge charge column 302 is realized by directly hanging the 90mm explosive roll into the blasthole 2. The PVC hollow tube 303 is used for spacing in the middle, and the PVC hollow tube 303 is used for spacing. The interior of the tube 303 is filled with polyurethane foam 308. The polyurethane foam 308 ensures that the PVC hollow tube 303 functions properly while making it lighter and more economical. A 70mm explosive roll is then hoisted into the blasthole 2 to achieve uncoupled charging. In this way, two explosive rolls of different diameters are placed inside the blasthole 2, changing the radial uncoupling degree of the charge in the blasthole 2 and reducing the peak pressure at the moment of detonation, thereby controlling the rate of large blasting blocks and reducing the generation of fine ore caused by excessive crushing of the ore screen. Finally, the finished machine-made sand is filled above the upper uncoupled charge column 304 to form a filling area 305. Since the finished sand has a high specific gravity and contains a certain amount of moisture, the filling quality is improved.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0038] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A charging structure for blasting granite ore for construction, comprising a mine (1) and a blasthole (2) opened inside the mine (1), characterized in that: A charge structure body (3) is provided inside the blasthole (2), and the charge structure body (3) includes a bottom reinforcement charge column (301) located at the bottom and a digital detonator leg line (306) located at the top. A detonating charge bag (307) is installed inside the bottom reinforcement charge column (301). A lower uncoupled charge charge column (302) is provided above the bottom reinforcement charge column (301). A PVC hollow tube (303) is placed above the lower uncoupled charge charge column (302), and the interior of the PVC hollow tube (303) is filled with polyurethane foam (308). An upper uncoupled charge charge column (304) is provided above the PVC hollow tube (303), and a filling area (305) is provided on the top of the upper uncoupled charge charge column (304).

2. The charging structure for blasting construction of granite ore for construction according to claim 1, characterized in that: The diameter of the blasthole (2) is 115 mm, and the depth of the blasthole (2) is 16.5 m.

3. The charging structure for blasting construction of granite ore for construction according to claim 1, characterized in that: The bottom reinforcement charge (301) is filled at the bottom of the blast hole (2), and the length of the bottom reinforcement charge (301) is 2m.

4. The charging structure for blasting construction of granite ore for construction according to claim 1, characterized in that: The distance between the detonating charge (307) and the bottom of the blast hole (2) is 1 m.

5. The charging structure for blasting construction of granite ore for construction according to claim 1, characterized in that: The length of the PVC hollow tube (303) is 3 m, the diameter of the PVC hollow tube (303) is 70 mm, and an antistatic layer (309) is provided on the outer surface of the PVC hollow tube (303).

6. The charging structure for blasting construction of granite ore for construction according to claim 1, characterized in that: The diameter of the explosive roll in the lower uncoupled charge column (302) is 90 mm, and the diameter of the explosive roll in the upper uncoupled charge column (304) is 70 mm.

7. The charging structure for blasting construction of granite ore for construction according to claim 3, characterized in that: The sum of the lengths of the bottom reinforced charge column (301) and the lower uncoupled charge column (302) is not less than 6.1 m.

8. The charging structure for blasting construction of granite ore for construction according to claim 1, characterized in that: The filling area (305) is filled with finished machine-made sand.

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