阅读说明：本技术 一种矿山爆破后残留雷管检测装置 (Residual detonator detection device after mine blasting ) 是由 王建国 李祥龙 左庭 王子琛 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种矿山爆破后残留雷管检测装置,属于爆破检测器材领域。本发明所述装置包括：接收线圈、发射线圈、转轴、电路板、手持开孔区、数据/供电线缆、外壳,外壳上设有9组线圈,线圈包括接收线圈和发射线圈,发射线圈与接收线圈呈同心圆关系,发射线圈位于接收线圈内；接收线圈、发射线圈、电路板通过线缆分别与外置电池和电脑相连；与传统的方法相比,本发明所述装置具有可折叠的设计方便携带,可应用于井下残留雷管的探测,既精准又高效的优点。(The invention discloses a device for detecting residual detonators after mine blasting, and belongs to the field of blasting detection equipment. The device of the invention comprises: the device comprises a receiving coil, a transmitting coil, a rotating shaft, a circuit board, a handheld hole opening area, a data/power supply cable and a shell, wherein 9 groups of coils are arranged on the shell, the coils comprise the receiving coil and the transmitting coil, the transmitting coil and the receiving coil are in a concentric circle relationship, and the transmitting coil is positioned in the receiving coil; the receiving coil, the transmitting coil and the circuit board are respectively connected with an external battery and a computer through cables; compared with the traditional method, the device has the advantages of foldable design, convenience in carrying, application to detection of underground residual detonators, accuracy and high efficiency.)

1. The utility model provides a residual detonator detection device after mine blasting which characterized in that, the device includes: the device comprises a receiving coil (1), a transmitting coil (2), a rotating shaft (3), a circuit board (4), a handheld opening area (5), a data/power supply cable (6) and a shell (7), wherein 9 groups of coils are arranged in the shell (7), the coils comprise the receiving coil (1) and the transmitting coil (2), the transmitting coil (2) and the receiving coil (1) are in a concentric circle relation, and the transmitting coil (2) is positioned in the receiving coil (1); the shell (7) is divided into 3 sections, the two adjacent sections are connected through the rotating shaft (3), a circuit board is arranged at one end of the shell (7), the receiving coil (1) and the transmitting coil (2) are respectively connected with the circuit board (4), and the circuit board (4) is respectively connected with an external battery through a cable (6).

2. The device for detecting residual detonators after mine blasting according to claim 1, wherein: the shell (2) is prepared from engineering plastics.

3. The device for detecting residual detonators after mine blasting according to claim 1, wherein: the tail end of the shell (7) is provided with a handheld perforated area (5), and the handheld perforated area (5) is processed by a fillet.

4. The device for detecting the residual detonators after the mine blasting according to any one of claims 1 to 3, wherein: the detonator shell material is detected and recorded in advance, the circuit board (4) transmits electromagnetic waves through the transmitting coil (2), and the existence of metal objects is analyzed through detecting the electromagnetic waves received by the receiving coil (1).

Technical Field

The invention relates to a device for detecting residual detonators after mine blasting, and belongs to the field of blasting detection equipment.

Background

With the rapid development of economy in China, the engineering blasting technology is widely applied to the fields of large-scale open mines, highways, railways, bridges, tunnels, quarries, hydropower stations, urban rail transit and the like; the engineering blasting greatly accelerates the infrastructure construction of China, and makes contributions to the economic construction of China, and meanwhile, the safety problem in blasting construction is more and more severe.

Aiming at the phenomenon that residual explosives often remain in tunnel tunneling blasting, unexploded detonators are usually difficult to find at the bottom of a blast hole, and huge potential safety hazards are brought to workers for slag removal operation after blasting; the phenomenon that a drilling machine touches an unexploded detonator to cause an explosion accident when a blast hole is drilled in a plurality of mines exists; the traditional method cannot effectively detect the residual pipe, and the invention provides a simple and effective residual pipe detection method and residual pipe detection equipment.

Disclosure of Invention

The invention aims to provide a device for detecting residual detonators on a tunnel face in tunnel excavation blasting, which comprises: the device comprises a receiving coil 1, a transmitting coil 2, a rotating shaft 3, a circuit board 4, a handheld opening area 5, a data/power supply cable 6 and a shell 7, wherein 9 groups of coils are arranged in the shell 7, the coils comprise the receiving coil 1 and the transmitting coil 2, the transmitting coil 2 and the receiving coil 1 are in a concentric circle relationship, and the transmitting coil 2 is positioned in the receiving coil 1; the shell 7 is divided into 3 sections, the adjacent two sections are connected through the rotating shaft 3, one end of the shell 7 is provided with a circuit board, the receiving coil 1 and the transmitting coil 2 are respectively connected with the circuit board 4, and the circuit board 4 is respectively connected with an external battery through the cable 6.

Preferably, the housing 2 is made of engineering plastics.

Preferably, the shell 7 of the present invention has a handheld opening area 5 at the end, and the handheld opening area 5 is processed by rounding.

The invention also aims to provide a method for detecting the residual detonators on the tunnel face of the tunnel excavation blasting, which comprises the following steps: the detonator shell material is detected and recorded in advance, the circuit board 4 transmits electromagnetic waves through the transmitting coil 2, and the existence of metal objects is analyzed through detecting the electromagnetic waves received by the receiving coil 1.

Because the detection environment is in the pit of the mine, and the detection object is comparatively clear and definite, the detection object is: the detonator with the red copper shell, the aluminum shell and the steel shell can detect and record the material of the detonator shell in advance, and the unexploded detonator can be accurately positioned. Because the change of the magnetic induction intensity is to be received, a group of detecting antennas consists of two groups of coils, one group is a transmitting coil, and the other group is a receiving coil.

The principle of the invention is as follows:

when no metal object is positioned in the induction range of the coil, the magnetic induction intensity cannot be changed, but when the metal object enters the induction range, the magnetic induction intensity is increased and the magnetic conductivity of the metal is increased; the principle of the metal detector is to detect whether there is a metal substance by detecting the change of the magnetic induction intensity.

Principle formula of metal detector:

wherein B is the magnetic induction intensity on the central axis of the coil, mu is the magnetic conductivity of the medium, R is the radius of the coil, x is the distance between the center of the coil and the object to be measured, and I is the current of the alternating current passed through the coil.

The invention has the beneficial effects that: the metal detector is designed aiming at the metal type of the detonator shell, the detection area is increased by the multiple groups of coils, the foldable design is convenient to carry, and the metal detector is applied to the detection of underground residual detonators, is accurate and efficient.

Drawings

FIG. 1 is a schematic view of the structure of the device of the present invention.

1-a transmitting coil and a receiving coil; 2-a housing; 3-a rotating shaft; 4-a circuit board; 5-holding the opening area by hand; 6-data/power supply cable

Detailed Description

The present invention is further described in detail with reference to the following specific examples, but the scope of the present invention is not limited to the above description.

Example 1

A device for detecting residual detonators after mine blasting, the device comprising: the device comprises a receiving coil 1, a transmitting coil 2, a rotating shaft 3, a circuit board 4, a handheld opening area 5, a data/power supply cable 6 and a shell 7, wherein 9 groups of coils (the coils are fixed in the shell by glue or bayonets and protected by the shell) are arranged in the shell 7, each coil comprises the receiving coil 1 and the transmitting coil 2, the transmitting coils 2 and the receiving coils 1 are in a concentric circle relationship, and the transmitting coils 2 are positioned in the receiving coils 1; the shell 7 is divided into 3 sections, the adjacent two sections are connected through the rotating shaft 3, one end of the shell 7 is provided with a circuit board, the receiving coil 1 and the transmitting coil 2 are respectively connected with the circuit board 4, the circuit board 4 is respectively connected with an external battery through a cable 6, and the shell 2 is prepared from engineering plastics; the terminal handheld trompil area 5 that is equipped with of shell 7, handheld trompil area 5 adopts the fillet to handle.

The method for detecting the residual detonators on the tunnel face of the tunnel excavation blasting in the embodiment comprises the following steps: the detonator shell material is detected and recorded in advance, the circuit board 4 transmits electromagnetic waves through the transmitting coil 2, and the existence of metal objects is analyzed through detecting the electromagnetic waves received by the receiving coil 1.

The 9 groups of receiving coils 1 and the transmitting coils 2 cannot be close to each other, so that crosstalk generated between the coils can not influence the detection result. The whole detector can be folded and stored by the two groups of rotating shafts 3, so that the detector is convenient to carry; the rotating shaft 3 needs to be subjected to waterproof and dustproof treatment to adapt to a damp and dusty underground environment; the handheld opening area 5 is rounded so as to be convenient for the operator to grasp with two hands; the shell 2 is made of high-strength light engineering plastics, so that the whole weight of the instrument can be reduced while the strength and the wear resistance are ensured, and the instrument is convenient for an operator to carry and use. The cable 6 is connected with an external battery and a receiving and holding computer, monitoring data are transmitted out in real time, and if a residual pipe exists, an alarm can be given to inform an operator that the coil detects the residual pipe.