Charging structure for hydraulic boosting blasting of strip mine

Abstract

The utility model discloses an explosive charging structure for hydraulic pressurized blasting of a strip mine. The explosive charging structure comprises a mine rock stratum; main explosives are arranged at the bottoms of the blast holes, water bags are mounted on the main explosives, and water columns formed by water are filled in the water bags; an advanced compression cartridge bag and rock debris are mounted on the water bag; and a friction strip is pre-embedded in the inner wall of the blast hole in the rock debris section. When the advanced compression cartridge bag is detonated, rock debris can be limited by the friction strip, and the friction strip can transfer external thrust of the rock debris into a mine rock stratum for auxiliary restraining and limiting, so that extrusion force is reduced when the advanced compression cartridge bag is detonated on the water bag, and the rock debris is not easy to be pushed outwards from the top of a blast hole when the extrusion force is diffused upwards; the extrusion effect of the blasting extrusion force on the water bag when the advanced compression cartridge bag is detonated is improved, and the problems that rock debris is restrained in a blast hole only through extrusion to be restrained by itself and is prone to being pushed outwards from the top of the blast hole, and the extrusion effect of the blasting extrusion force on the advanced compression cartridge bag on the water bag is reduced are solved.

Description

Technical Field

[0001] The utility model relates to a charging structure for hydraulic pressure boosting blasting in an open-pit mine, belonging to the technical field of blasting charging construction. Background Art

[0002] When mining in an open-pit mine, due to the high hardness of the rock strata in the mine, the mine holes need to be loosened by explosive blasting before excavators and other construction machinery can be used for excavation.

[0003] In order to increase the effective transfer of blasting energy, a water bag with a water column is placed in the blasting charge structure, such as the Chinese patent announcement number CN102944147B, which discloses the following technology: a water bag is placed on the top of the main explosive, and the water bag is filled with water according to a pre-designed amount of water to form a water column. An advanced compression bag is arranged on the top of the water column, and the upper part of the water bag is filled with rock chips. Although the water bag with the water column on the top of the main explosive can transfer more energy to the mine rock layer during blasting, the blast hole on the top of the water bag is blocked by rock chips. Since the rock chips are only constrained in the blast hole by extrusion, when the advanced compression bag is detonated on the water bag, the extrusion force spreads upward, and the rock chips are easily pushed outward from the top of the blast hole, which reduces the extrusion effect of the blasting extrusion force of the advanced compression bag on the water bag. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a charging structure for hydraulic booster blasting in open-pit mines.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a charging structure for hydraulic booster blasting in an open-pit mine, comprising:

[0007] Mining rock formations with sunken blastholes in them;

[0008] There is a main explosive at the bottom of the blasthole, a water bag is installed on the main explosive, and the water bag is filled with a water column consisting of water; an advanced compression bag and rock cuttings are installed on the water bag, and the rock cuttings cover the top surface of the water bag and the side of the advanced compression bag;

[0009] A friction strip is pre-embedded in the inner wall of the blasthole located in the rock debris section.

[0010] The advanced compressed charge has an advanced compressed charge detonator for detonation, and the advanced compressed charge detonator is connected with a detonating cord, which penetrates through the rock cuttings and extends out of the top of the blast hole to be exposed.

[0011] The main explosive is equipped with a main explosive detonator for detonation, and the main explosive detonator is connected with a detonating line, which extends from the main explosive, the water bag and the rock cuttings to the top of the blast hole and is exposed.

[0012] One end of the friction strip is clamped in the mine rock layer on the inner wall of the blast hole, and the other end of the friction strip extends upward or downward.

[0013] The friction strip is made of a glass fiber mesh.

[0014] The friction strips extend crosswise and obliquely into the rock debris.

[0015] The beneficial effects of the utility model are as follows: when the advance compression charge is detonated, the rock cuttings can be restricted by the friction strips, and the friction strips can transmit the outward thrust of the rock cuttings to the rock formation of the mine for auxiliary restraint and limitation, thereby reducing the squeezing force when the advance compression charge is detonated on the water bag. When the squeezing force spreads upward, the rock cuttings are not easily pushed outward from the top of the blast hole, thereby improving the squeezing effect of the blasting squeezing force on the water bag when the advance compression charge is detonated, thereby solving the problem that the rock cuttings are easily pushed outward from the top of the blast hole if they only rely on squeezing constraint to restrain themselves in the blast hole, thereby reducing the squeezing effect of the blasting squeezing force of the advance compression charge on the water bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main cross-section of the utility model; DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0018] like Figure 1 shown.

[0019] The utility model discloses a charging structure for hydraulic pressure boosting blasting in an open-pit mine, comprising:

[0020] A mine rock stratum 10 is drilled with a blasthole 8 by a drilling rig. A main explosive 1 is arranged in the blasthole 8 at the bottom of the mine rock stratum 10. A water bag 3 is installed on the main explosive 1. The water bag 3 is filled with a water column 4 consisting of water.

[0021] The water bag 3 is provided with an advanced compression medicine bag 6 and rock cuttings 7 , and the rock cuttings 7 seal and cover the top surface of the water bag 3 and the side surface of the advanced compression medicine bag 6 .

[0022] The advanced compressed charge 6 includes an advanced compressed charge detonator 5 for detonation, and the advanced compressed charge detonator 5 is connected to a detonating cord 9, which penetrates through the rock cuttings 7 and extends out of the top of the blast hole 8 to be exposed.

[0023] The main explosive 1 is provided with a main explosive detonator 2 for detonation, and the main explosive detonator 2 is connected with a detonating line, which extends from the main explosive 1, the water bag 3 and the rock cuttings 7 to the top of the blast hole 8 and is exposed.

[0024] A friction strip 71 is pre-embedded in the inner wall of the blasthole 8 located in the rock cuttings 7 section. One end of the friction strip 71 is clamped in the mine rock layer 10 on the inner wall of the blasthole 8, and the other end of the friction strip 71 extends upward or downward at an angle. The friction strip 71 is made of a 20-mesh glass fiber mesh and has a certain elasticity. The friction strip 71 crosses and extends obliquely into the rock cuttings 7.

[0025] When the advance compression charge 6 is detonated, since the rock chips 7 can be restricted by the friction strip 71, the friction strip 71 can transmit the outward thrust of the rock chips 7 to the mine rock layer 10 for auxiliary constraint and limitation, thereby reducing the squeezing force of the advance compression charge when detonating on the water bag. When the squeezing force spreads upward, the rock chips are not easily pushed outward from the top of the blast hole, thereby improving the squeezing effect of the blasting squeezing force on the water bag 3 when the advance compression charge 6 is detonated, and solving the problem that the rock chips are easily pushed outward from the top of the blast hole if they only rely on squeezing constraint to constrain themselves in the blast hole, thereby reducing the squeezing effect of the blasting squeezing force of the advance compression charge on the water bag.

Claims

1. A charging structure for hydraulic booster blasting in an open-pit mine. It is characterized in that include: A mine rock layer (10), wherein a sunken blast hole (8) is provided in the mine rock layer (10); A main explosive (1) is provided at the bottom of the blasthole (8), a water bag (3) is installed on the main explosive (1), and a water column (4) composed of water is filled in the water bag (3); an advanced compression bag (6) and rock cuttings (7) are installed on the water bag (3), and the rock cuttings (7) cover the top surface of the water bag (3) and the side surface of the advanced compression bag (6); A friction strip (71) is pre-buried in the inner wall of the blasthole (8) located in the rock debris (7) section.

2. The charging structure for hydraulic booster blasting in an open-pit mine as claimed in claim 1, Features: The advanced compressed charge (6) contains an advanced compressed charge detonator (5) for detonation, the advanced compressed charge detonator (5) is connected to a detonating cord (9), and the detonating cord (9) penetrates the rock debris (7) and extends out of the top of the blast hole (8) to be exposed.

3. The charging structure for hydraulic booster blasting in an open-pit mine as claimed in claim 1, Features: The main explosive (1) is provided with a main explosive detonator (2) for detonation. The main explosive detonator (2) is connected with a detonating line. The detonating line extends from the main explosive (1), the water bag (3) and the rock debris (7) to the top of the blast hole (8) and is exposed.

4. The charging structure for hydraulic booster blasting in an open-pit mine as claimed in claim 1, Features: One end of the friction strip (71) is clamped in the mine rock layer (10) on the inner wall of the blast hole (8), and the other end of the friction strip (71) extends upward or downward in an inclined manner.

5. The charging structure for hydraulic booster blasting in an open-pit mine as claimed in claim 1 or 4, Features: The friction strip (71) is made of a (20) mesh glass fiber mesh.

6. The charging structure for hydraulic booster blasting in an open-pit mine as claimed in claim 1, Features: The friction strips (71) extend crosswise and obliquely into the rock debris (7).

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