Tunneling blasting blast hole blocking device
By designing a gun hole blocking device for excavation blasting, the combined structure of expansion tube and sliding plug is used to solve the problem of poor clogging quality in tunnel or tunnel bore blasting, achieving efficient energy utilization and cost reduction effects.
Patent Information
- Application Number
- CN202421306901.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-07
AI Technical Summary
In tunnel or tunnel boring blasting, rock chips generated by drilling cannot be blocked, resulting in a large loss of explosive explosion energy, low energy utilization rate, and the use of cannon mud requires special equipment and materials, which is low in efficiency and high cost.
A device for clogging of the bore hole through the bore blasting blast hole is designed, including an expansion tube, an active sliding plug, a passive sliding plug and a connecting rope. Through the expansion tube and the sliding of the plug, effective blocking of the bore hole is achieved.
The device is simple to operate and low cost. It can improve the energy utilization rate of explosive blasting, reduce the energy loss of blasting shock waves, and reduce the cost of blasting materials, with obvious overall benefits.
Smart Images
Figure CN222460480U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blasting, in particular to a tunneling blasting blasthole plugging device. Background Art
[0002] In the case of open-pit blasting, the rock cuttings produced by drilling can be used for blocking. However, in the blasting of roadway or tunnel excavation, the rock cuttings produced by drilling cannot be used due to the limitations of operating conditions. In most cases, non-blocking blasting is adopted, or simple blocking is carried out using materials such as explosive packaging cartons and plastic bags, or special gun mud machines are used to produce special gun mud.
[0003] The use of non-blocking blasting or the use of explosive packaging cartons, plastic bags and other materials for simple blocking cannot meet the blocking quality required by the blasting technology, which will cause a large loss of explosive explosion energy and low energy utilization, seriously affecting the blasting effect; the use of cannon mud for blocking can meet the blocking quality requirements, but the production of cannon mud requires special equipment and materials, and the manual production of cannon mud is inefficient, costly, and labor-intensive. The transportation and handling of cannon mud and the on-site use and operation are also inefficient and labor-intensive, which seriously affects the efficiency of the filling operation. Utility Model Content
[0004] The purpose of the utility model is to solve the above technical problems, thereby providing a tunneling blasting blasthole blocking device;
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0006] The utility model provides a device for plugging blasting holes.
[0007] The blocking device includes an expansion tube, an active sliding plug, a passive sliding plug, and a connecting pull rope. The expansion tube is hollow at both ends. The active sliding plug is arranged at one end of the expansion tube, and the passive sliding plug is arranged at the other end of the expansion tube. The passive sliding plug can slide along the expansion tube. A through hole is opened on the side wall of the expansion tube. The expansion tube is provided with the connecting pull rope, one end of the connecting pull rope is connected to the side wall of the active sliding plug, and the other end of the connecting pull rope is connected to the side wall of the passive sliding plug through the through hole.
[0008] Optionally, both end side walls of the expansion tube are provided with fine slits.
[0009] Optionally, the slits are arranged in a plurality of groups, and the slits in the plurality of groups are evenly distributed along the circumference of the surface of the expansion tube.
[0010] Optionally, the cross-section of the through hole is set to a circular structure, or the cross-section of the through hole is set to a rectangular structure.
[0011] Optionally, the active sliding plug and the passive sliding plug are of the same large and small head conical platform structure.
[0012] Beneficial effects of the utility model
[0013] The utility model is simple and easy to operate, and has low cost. When used, it can not only improve the utilization rate of explosive blasting energy and reduce the energy loss of blasting shock waves, but also replace gun mud blockage, which can reduce the cost of blasting materials and has obvious comprehensive benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the utility model for filling in a blasthole.
[0015] Figure 2 It is a structural cross-sectional view of the utility model.
[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model.
[0017] Explanation of the reference numerals: 1-expansion tube; 2. active sliding plug; 3. passive sliding plug; 4. pull rope; 5. through hole; 6. slit; 7. medicine roll in the hole; 8. detonating charge in the hole; 9. electronic detonator. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] Example
[0020] like Figure 1-Figure 3 As shown, the utility model provides a device for plugging blasting holes.
[0021] The plugging device comprises an expansion tube 1, an active sliding plug 2, a passive sliding plug 3, and a connecting pull rope 4. The active sliding plug 2 and the passive sliding plug 3 are of the same large and small head conical platform structure. The expansion tube 1 is hollow at both ends. The active sliding plug 2 is arranged at one end of the expansion tube 1, and the passive sliding plug 3 is arranged at the other end of the expansion tube 1. The passive sliding plug 3 can slide along the expansion tube 1. A through hole 5 is opened on the side wall of the expansion tube 1. The connecting pull rope 4 is arranged on the expansion tube 1. One end of the connecting pull rope 4 is connected to the side wall of the active sliding plug 2, and the other end of the connecting pull rope 4 is connected to the side wall of the passive sliding plug 3 through the through hole 5.
[0022] The active sliding plug 2 is fixed at one end of the expansion tube 1, while the passive sliding plug 3 can slide along the expansion tube 1. This design allows the passive sliding plug 3 to move inside the expansion tube 1 to adapt to different blasthole depths, while the active sliding plug 2 remains fixed to provide a stable support point when the expansion tube 1 expands. Therefore, the active sliding plug 2 usually does not slide along the expansion tube 1. This design helps to ensure that the device can effectively block and seal in the blasthole to prevent the escape of gas and debris during the blasting process.
[0023] The cross section of the through hole 5 is set to a circular structure, or the cross section of the through hole 5 is set to a rectangular structure, which can be set according to actual needs;
[0024] After the excavation working face is filled with explosives, the two ends of the active sliding plug are placed at the hole of the expansion tube 1, with the large end facing the outside of the hole of the expansion tube 1; the three ends of the passive sliding plug are placed in the hole of the expansion tube 1, with the large end facing the inside of the hole of the expansion tube 1. When the active sliding plug 2 is tamped with a blasting stick, the expansion tube 1 at the hole end is expanded to fit tightly with the wall of the blasting hole, and the friction force increases to prevent the plugging device from sliding in the blasting hole; the passive sliding plug 3 in the hole of the expansion tube 1 slides into the expansion tube 1 under the action of the pull rope or the initial pressure of the blasting, and the expansion tube 1 is expanded to fit tightly with the wall of the blasting hole, and the friction force increases to prevent the plugging device from sliding out of the hole until the plugging device is completely destroyed under the action of the blasting;
[0025] The side walls at both ends of the expansion tube 1 are provided with fine slits 6, which are arranged in several groups, and the several groups of fine slits 6 are evenly distributed along the surface circumference of the expansion tube 1. The fine slits 6 allow the expansion tube 1 to expand evenly when the internal pressure increases, so that it can better adapt to the shape and size of the blast hole, thereby improving the sealing effect. In addition, the presence of the fine slits 6 also helps to reduce the stress concentration of the material, avoid the expansion tube 1 from rupturing during the blasting process, and ensure the stability and safety of the plugging device. By evenly distributing the fine slits 6 along the circumference of the surface of the expansion tube 1, the expansion tube 1 can bear the pressure more evenly during blasting, further improving the plugging effect and durability;
[0026] The utility model is simple and easy to operate, and has low cost. When used, it can not only improve the utilization rate of explosive blasting energy and reduce the energy loss of blasting shock waves, but also replace gun mud blockage, which can reduce the cost of blasting materials and has obvious comprehensive benefits.
[0027] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A device for plugging blasting holes, characterized in that: The blocking device includes an expansion tube, an active sliding plug, a passive sliding plug, and a connecting pull rope. The expansion tube is hollow at both ends. The active sliding plug is arranged at one end of the expansion tube, and the passive sliding plug is arranged at the other end of the expansion tube. The passive sliding plug can slide along the expansion tube. A through hole is opened on the side wall of the expansion tube. The expansion tube is provided with the connecting pull rope, one end of the connecting pull rope is connected to the side wall of the active sliding plug, and the other end of the connecting pull rope is connected to the side wall of the passive sliding plug through the through hole.
2. The device for plugging a blasting hole for excavation according to claim 1, characterized in that: The side walls at both ends of the expansion tube are provided with fine slits.
3. The device for plugging a blast hole for excavation according to claim 2, characterized in that: The fine slits are arranged in a plurality of groups, and the plurality of groups of fine slits are evenly distributed along the surface circumference of the expansion tube.
4. The device for plugging a blasting hole for excavation according to claim 1, characterized in that: The cross section of the through hole is set to a circular structure, or the cross section of the through hole is set to a rectangular structure.
5. The device for plugging a blasting hole for excavation according to claim 1, characterized in that: The active sliding plug and the passive sliding plug are of the same large and small head conical platform structure.