Fast well completion blast hole of gently inclined multi-layer parallel tungsten ore ventilation system

Abstract

The utility model discloses a fast well completion blast hole of a gently inclined multilayer parallel tungsten ore ventilation system, which comprises a drill hole and is characterized in that a suspension steel wire is arranged in the center of the drill hole, a hole plugging sandbag is fixed at the bottom of the suspension steel wire, a lower sand filling layer is arranged on the upper portion of the hole plugging sandbag, and an emulsion explosive area is arranged on the upper portion of the lower sand filling layer. A stone layer is arranged at the contact position of the emulsion explosive area and the lower sand filling layer, a detonating cord is arranged on the edge of the emulsion explosive area and fixed to the stone layer, a second detonator is arranged on the upper portion of the detonating cord, an upper sand filling layer is arranged on the upper portion of the emulsion explosive area, a detonating tube is arranged on one side of the upper sand filling layer, and the detonating cord is arranged in the detonating tube. And subsequent tungsten ore mining is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical direction of mining technology, and specifically relates to a blasting hole for quickly forming a shaft in a ventilation system of gently inclined multi-layer parallel tungsten ore. Background Art

[0002] For gently inclined multi-layer nearly parallel tungsten ore bodies, the panel room and pillar method is generally used for mining. When mining each stratified ore body, problems such as cross-flow of polluted air and ventilation short-circuit are likely to occur in the system. Generally, at certain intervals underground, connecting return air raises are set between each layer, so that the polluted air generated by each layer of operation is concentrated to the main return airway of the middle section for return air. Usually, there are two methods for forming the underground stratified return air shaft: manual shaft sinking or equipment shaft sinking. Manual shaft sinking generally uses manual construction of inclined shafts or vertical shafts. This process has a small shaft sinking section, high operation risks (no place for personnel to take shelter from rib spalling and roof fall), and slow construction speed. Equipment shaft sinking mostly uses raise boring for shaft sinking. This process requires a large investment in equipment and a large roadway section for construction, and is suitable for thick and large ore bodies in large mines. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a blasting hole for quickly forming a shaft in a ventilation system of gently inclined multi-layer parallel tungsten ore to solve the problems raised in the above background art in view of the existing technical problems.

[0004] To solve the above technical problems, the utility model provides the following technical solution: A blasting hole for quickly forming a shaft in a ventilation system of gently inclined multi-layer parallel tungsten ore, including a drill hole, characterized in that: a suspension wire is arranged at the center position of the drill hole, a plugging sandbag is fixed at the bottom of the suspension wire, a lower sand filling layer is arranged above the plugging sandbag, an emulsion explosive area is arranged above the lower sand filling layer, a stone layer is arranged at the contact position between the emulsion explosive area and the lower sand filling layer, a detonating cord is arranged at the edge position of the emulsion explosive area, the detonating cord is fixed on the stone layer, a second detonator is arranged above the detonating cord, an upper sand filling layer is arranged above the emulsion explosive area, a detonating tube is arranged on one side of the upper sand filling layer, and the detonating cord is arranged inside the detonating tube.

[0005] Preferably, the drill holes are distributed in a circular ring shape. The radius of the first circle of drill holes is 40 mm, and the radius of the second circle of drill holes is 100 mm.

[0006] Preferably, the drill holes are connected by detonating tubes, and first detonators are installed on the detonating tubes.

[0007] Preferably, a rubber layer is arranged outside the plugging sandbag.

[0008] Compared with the existing technology, the beneficial effects achieved by the utility model are: This quick shaft-forming blasting hole technology is applicable to the quick formation of the ventilation system of gently inclined multi-layer parallel tungsten ore bodies, and has the characteristics of fast shaft-forming speed, safe construction operation, and can also be constructed in low roadway. Brief Description of the Drawings

[0009] The accompanying drawings are used to provide a further understanding of the present utility model and form a part of the description. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the accompanying drawings:

[0010] Figure 1 is the overall structure diagram of the present utility model;

[0011] Figure 2 is the drilling cross-sectional view of the present utility model;

[0012] Figure 3 is the drilling detonation distribution diagram of the present utility model;

[0013] Figure 4 is the schematic diagram of the sandbag structure for plugging holes of the present utility model. Detailed implementation manners

[0014] The technical solution of the present utility model will be further described in detail and non-limitingly below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0015] As Figures 1-4 described, the longhole blasting holes for rapid shaft sinking in the gentle dip multi-layer parallel tungsten ore ventilation system of the present utility model application include a drilling hole 1, and are characterized in that: a suspension wire 2 is arranged at the central position of the drilling hole 1, a sandbag 6 for plugging the hole is fixed at the bottom of the suspension wire 2, a lower sand filling layer 5 is arranged above the sandbag 6 for plugging the hole, an emulsion explosive area 4 is arranged above the lower sand filling layer 5, a stone layer 7 is arranged at the contact position between the emulsion explosive area 4 and the lower sand filling layer 5, a detonating cord 8 is arranged at the edge position of the emulsion explosive area 4, the detonating cord 8 is fixed on the stone layer 7, a second detonator 9 is arranged above the detonating cord 8, an upper sand filling layer 3 is arranged above the emulsion explosive area 4, a detonating tube 10 is arranged on one side of the upper sand filling layer 3, the detonating cord 8 is arranged inside the detonating tube 10, the drilling holes 1 are distributed in a circular shape, the radius of the first circle of drilling holes 1 is 40 mm, the radius of the second circle of drilling holes 1 is 100 mm, the drilling holes 1 are connected by the detonating tube 10, a first detonator 11 is installed on the detonating tube 10, a rubber layer 12 is arranged outside the sandbag 6 for plugging the hole, and this rapid shaft sinking technology is applicable to the rapid formation of the ventilation system of the gentle dip multi-layer parallel tungsten ore body, and has the characteristics of fast shaft sinking speed, safe construction operation, and can be constructed in low roadway.

[0016] This shaft sinking technology uses a small bracket type down-the-hole drill to construct circularly arranged drilling holes, and then adopts a sectional blasting method (blasting 2 - 3 m each time) to blast the shaft section by section. A rubber layer 12 is arranged outside the sandbag 6 for plugging the hole, and under the action of gravity compression, the sealing performance of the rubber layer 12 will be further improved.

[0017] During the blasting process, the first detonator 11 is detonated first, and then the detonating cord 8 sequentially detonates the second detonators 9 arranged in a ring in the boreholes 1, so as to detonate the emulsion explosive zone 4 inside the boreholes 1 for blasting.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model.

[0019] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A gently inclined multi-layer parallel tungsten mine ventilation system rapid well blasting hole, comprising a borehole (1), characterized in that: A suspension wire (2) is arranged at the center of the borehole (1), a hole-blocking sandbag (6) is fixed at the bottom of the suspension wire (2), a lower sand filling layer (5) is arranged on the upper part of the hole-blocking sandbag (6), an emulsion explosive area (4) is arranged on the upper part of the lower sand filling layer (5), a stone layer (7) is arranged at the contact position between the emulsion explosive area (4) and the lower sand filling layer (5), a detonating cord (8) is arranged at the edge of the emulsion explosive area (4), the detonating cord (8) is fixed on the stone layer (7), a second detonator (9) is arranged on the upper part of the detonating cord (8), an upper sand filling layer (3) is arranged on the upper part of the emulsion explosive area (4), a detonating cord (10) is arranged on one side of the upper sand filling layer (3), and the detonating cord (8) is arranged inside the detonating cord (10).

2. The gently inclined multi-layer parallel tungsten mine ventilation system rapid well blasting hole according to claim 1 is characterized by: The drill holes (1) are distributed in a circular shape, the radius of the first circle of drill holes (1) is 40 mm, and the radius of the second circle of drill holes (1) is 100 mm.

3. The gently inclined multi-layer parallel tungsten mine ventilation system rapid well blasting hole according to claim 1 is characterized by: The drill hole (1) is connected with a detonating tube (10), and a first detonator (11) is installed on the detonating tube (10).

4. The gently inclined multi-layer parallel tungsten mine ventilation system rapid well blasting hole according to claim 1 is characterized by: A rubber layer (12) is arranged outside the hole-blocking sandbag (6).

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