Explosive charging structure for separate mining and separate blasting of surface mine residual ore
By using hard transparent plastic plates and hemp rope partition plates in the residual ore disassembly loading structure in the open-pit mine, the filling is avoided from directly contacting and extruding the upper explosive section, and the safety hazards in the existing technology are solved , improves the safety of the filling process.
Patent Information
- Application Number
- CN202421057614.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-05-15
AI Technical Summary
When the existing sectioned air-spaced charge structure is filled with filling, the filling directly contacts and squeezes the upper explosive section, which may lead to safety risks.
Use a hard transparent plastic plate as the partition plate, which is connected to the crossbar through a hemp rope. The partition plate is slightly intersected and stuck on the inner wall of the gun hole. The partition plate transmits the force and squeeze pressure of the stuffing to avoid direct contact and transmission to the upper explosives. The detonator cable extends from the stuffing out of the top of the gun hole.
Effectively release the extrusion pressure of the stuffing, avoiding the stuffing from directly contacting the upper explosive section to squeeze, improves safety and solves hidden dangers.
Smart Images
Figure CN222165891U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a charging structure for separate mining and blasting of residual ore in an open-pit mine, belonging to the technical field of blasting construction. Background Art
[0002] When mining residual ore in open-pit mines in graded manner, blasting is required before mechanical excavation. When blasting in a differentiated ore-rock environment, a segmented air-spaced charge structure is used.
[0003] The existing segmented air-spaced charge structure is disclosed in Chinese patent publication number CN110530219B, and the disclosed technology is: two-stage explosive charging, which is divided into a bottom explosive section, an air section, and an upper explosive section from bottom to top, and the upper explosive is suspended by a hemp rope, and a filling material is filled on the upper explosive; although the upper explosive can be suspended in the blast hole by tying it to a cross arm by a hemp rope, there is a great hidden danger that the filling material will directly contact and squeeze the upper explosive section when it is filled in the blast hole. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a charging structure for separate mining and blasting of residual ore in an open-pit mine.
[0005] The utility model is realized through the following technical solutions.
[0006] The utility model provides a charging structure for separate mining and blasting of residual ore in an open-pit mine, comprising:
[0007] Blast holes formed in the rock formations of a mine;
[0008] A cross arm is placed horizontally on the top of the blasthole, a bottom explosive section is installed at the bottom of the blasthole, an upper explosive section is spaced between the blastholes above the bottom explosive section, a spacer section is in the space between the bottom explosive section and the upper explosive section, and air is inside the spacer section.
[0009] The upper explosive section is tied to a cross arm through a hemp rope and is suspended in the blast hole.
[0010] The hemp rope is fixedly connected with spacer plates at intervals, and the spacer plates at the lowest part are spaced above the upper explosive section.
[0011] The spaces between the partition plates and between the partition plates and the blast holes are filled with fillers; the partition plates are slightly interfered with and stuck on the inner wall of the blast holes.
[0012] The partition plate is a hard transparent plastic plate.
[0013] The bottom explosive section and the upper explosive section are connected with a detonating cord for guiding detonation; the detonating cord extends from the filling material to the top of the blast hole.
[0014] The beneficial effects of the utility model are as follows: the force applied when the filler is filled and the extrusion pressure of the filler itself are released on the partition plate, and the partition plate is transmitted to the crossbeam on the top of the horizontal blasthole through the hemp rope and transmitted to the mine rock layer, thereby avoiding the extrusion pressure of the filler itself from directly contacting and transmitting to the upper explosive section, thus solving the major hidden danger that the filler will directly contact and squeeze the upper explosive section when filling the blasthole. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the main cross-section of the utility model;
[0016] In the figure: 1-cross arm; 2-blast hole; 3-mine rock layer; 4-bottom explosive section; 5-upper explosive section; 6-spacer section; 7-hemp rope; 8-spacer board; 9-filler; 10-detonating cord. 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 present application discloses a charging structure for separate mining and blasting of residual ore in an open-pit mine, comprising:
[0020] A blasthole 2 with a cross arm 1 placed horizontally on the top is formed in a mine rock layer 3 by a drilling machine. A bottom explosive section 4 is installed at the bottom of the blasthole 2. An upper explosive section 5 is spaced between the blasthole 2 above the bottom explosive section 4. A spacing section 6 is arranged in the space between the bottom explosive section 4 and the upper explosive section 5, and the spacing section 6 is filled with air.
[0021] The upper explosive section 5 is tied to the cross arm 1 by a hemp rope 7 and is suspended in the blast hole 2. The hemp rope 7 is fixedly connected with a spacer plate 8 at intervals, and the spacer plate 8 at the bottom is spaced above the upper explosive section 5. The space between the spacers 8 and between the spacers 8 and the blast hole 2 is filled with a filler 9; the spacer plate 8 is slightly interfered with the inner wall of the blast hole 2. When the hemp rope 7 is disconnected from the cross arm 1, the upper explosive section 5 can be supported by pulling the spacer plate 8 on the inner wall of the blast hole 2 through the hemp rope 7.
[0022] The partition plate 8 is made of a hard transparent plastic plate.
[0023] The filler 9 is supported by the spacer plate 8 and is located on the upper explosive section 5. The force applied when the filler 9 is filled and the extrusion pressure of the filler 9 itself are released on the spacer plate 8. The spacer plate 8 is transmitted to the cross arm 1 on the top of the horizontal blast hole 2 through the hemp rope 7 and transmitted to the mine rock layer 3, thereby avoiding the extrusion pressure of the filler 9 itself from directly contacting and transmitting to the upper explosive section 5, and solving the major hidden danger that the filler will directly contact and squeeze the upper explosive section when filling the blast hole.
[0024] The bottom explosive section 4 and the upper explosive section 5 are connected with a detonating cord 10 for guiding detonation, and the detonating cord 10 extends from the filling material 9 to the top of the blasthole 2 .
Claims
1. A charging structure for separate mining and blasting of residual ore in an open-pit mine, characterized in that: include: A blast hole (2) formed in a mine rock formation (3); A cross arm (1) is horizontally arranged on the top of the blast hole (2), a bottom explosive section (4) is installed at the bottom of the blast hole (2), an upper explosive section (5) is spaced apart from the blast hole (2) above the bottom explosive section (4), a spacer section (6) is provided in the space between the bottom explosive section (4) and the upper explosive section (5), and air is contained in the spacer section (6).
2. The open-pit mine residual ore separate mining and blasting charging structure according to claim 1, characterized in that: The upper explosive section (5) is tied to the cross arm (1) by a hemp rope (7) and is suspended in the blast hole (2).
3. The charge structure for separate mining and blasting of residual ore in an open-pit mine as claimed in claim 2, characterized in that: The hemp rope (7) is fixedly connected with a spacer plate (8) at intervals, and the spacer plate (8) at the bottom is spaced above the upper explosive section (5).
4. The charge structure for separate mining and blasting of residual ore in an open-pit mine as claimed in claim 3, characterized in that: The spaces between the partition plates (8) and between the partition plates (8) and the blast hole (2) are filled with fillers (9); the partition plates (8) are interference fit on the inner wall of the blast hole (2).
5. The charge structure for separate mining and blasting of residual ore in an open-pit mine as claimed in claim 4, characterized in that: The partition plate (8) is a hard transparent plastic plate.
6. The charge structure for separate mining and blasting of residual ore in an open-pit mine according to claim 1, characterized in that: The bottom explosive section (4) and the upper explosive section (5) are connected with a detonating cord (10) for guiding detonation; the detonating cord (10) extends from the filling material (9) out of the top of the blasthole (2).