CN115389778A - Device and method for measuring detonation velocity of emulsion explosive under static pressure condition - Google Patents
Device and method for measuring detonation velocity of emulsion explosive under static pressure condition Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
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Abstract
A device and a method for measuring the detonation velocity of emulsion explosive under the condition of static pressure are disclosed, wherein one end of a pressure pipe of the device is connected with an upper end cover of the pressure pipe, the other end of the pressure pipe is connected with a lower end cover of the pressure pipe, the lower end cover of the pressure pipe is provided with a wire joint with a sealing ring, a digital electronic detonator is inserted into the left end of a detected emulsion explosive package, a probe is bound on the detected emulsion explosive package, the detected emulsion explosive package is arranged in the pressure pipe, a signal transmission wire and a digital electronic detonator lead are conducted from the pressure pipe through the wire joint with the sealing ring and extend to the outside of the pressure pipe, the signal transmission wire is led out from the pressure pipe and is connected to a detonation velocity meter, and the digital electronic detonator lead is led out from the pressure pipe and is connected to a digital electronic detonator initiator. The invention can test the water-resistant and compression-resistant explosion of the emulsion explosive before formal explosion, and can know and analyze the explosion performance and the water-resistant and compression-resistant performance of the emulsion explosive under different pressures, thereby preparing for smooth explosion work.
Description
Technical Field
The invention relates to the technical field of explosive detonation velocity measurement, in particular to a device and a method for measuring the detonation velocity of an emulsion explosive under a static pressure condition.
Background
The detonation velocity of an explosive is the propagation velocity of a detonation wave, which reflects the explosive properties of the explosive and indirectly represents other detonation parameters. Detonation velocity is an important quality indicator for explosives. The higher the detonation velocity, the greater the explosive power. The method for measuring the detonation velocity of the explosive is various, and is divided into three categories, namely a detonating cord method, an electrical measurement method and a high-speed photography method according to the principle of the method.
The electric measurement method adopts a detonation velocity meter to record the propagation time t of detonation waves in a explosive package, measures the distance h of a corresponding interval, and calculates the detonation velocity by using a formula v = h/t.
In the actual blasting work, the detonation velocity of the explosive is influenced by the external blasting environment besides being related to the chemical property of the explosive. When the emulsion explosive is used for underwater blasting, although the emulsion explosive has the characteristics of high blasting speed, high power, high sensitivity and good water resistance, the phenomena of blind blasting and explosive refusal blasting are easy to occur in the underwater blasting due to the complexity of underwater working environment, namely low visibility and different water depths which have different water pressure influences on the blasting performance of the explosive. Therefore, the explosion velocity test of the emulsion explosive needs to be carried out before formal explosion, and the explosion performance, the water resistance and the pressure resistance of the emulsion explosive under different pressures are known and analyzed. The conventional emulsion explosive detonation velocity testing device is complex in structure and high in cost, and cannot simulate the condition that the explosive is strongly pressed in deep water.
The study of domestic and foreign scholars on the static pressure resistance and the explosion velocity of the emulsion explosive in underwater blasting is less, and the static pressure test device designed by Michel, demi and let compared with Gull determines the limit static pressure which the explosive can bear by applying pressure in the blast pipe, but cannot measure the explosion velocity of the explosive under a certain static pressure condition. Jie Lifeng, liu Xuejiang designed on the basis of Michell et al, the hydraulic pressure explosion device can be used for measuring the detonation velocity and detonation sensitivity of the emulsion explosive, but the device is complex, is not easy to operate, and is more suitable for the laboratory to test the emulsion explosive for compression resistance. The patent "an emulsion explosive water resistance pressure" (patent No. 201420627990.7) links to each other the manometer tube that experimental usefulness passes through the choke valve with the water pump, and the accessible water pump is poured into different water yield and is simulated emulsion explosive's water resistance and resistance to pressure under the different water depth condition, but the volume of manometer tube is limited, and the depth of water that can simulate is also limited.
Therefore, there is a need to develop a device and a method for measuring the detonation velocity of an emulsion explosive under static pressure condition, which can overcome the shortcomings of the prior art and provide for smooth blasting operation.
Disclosure of Invention
The invention aims to provide a device for measuring the explosion velocity of an emulsion explosive under a static pressure condition, and also aims to provide a method for measuring the explosion velocity by using the device, which can be used for simulating and measuring the actual explosion velocity of the emulsion explosive under the influence of liquid pressure at different water depths, carrying out an explosion velocity measurement test on the emulsion explosive before formal explosion, knowing and analyzing the explosion performance and the water and pressure resistance of the emulsion explosive under different pressures and preparing for smooth blasting operation.
In order to achieve the purpose, the technical scheme of the invention is as follows: the device for measuring the detonation velocity of the emulsion explosive under the static pressure condition comprises the following components: manometer, air valve switch, rubber inflating valve, pressure pipe upper end cover, pressure pipe lower end cover, pressure pipe, digital electronic detonator, probe, by survey emulsion explosive cartridge bag, take the sealing washer lead wire to connect, signal transmission electric wire and digital electronic detonator wire, the concrete structure and the relation of connection of constituteing the component are:
the utility model discloses a pressure pipe, including pressure pipe upper end cover, pressure pipe inner wall, pressure pipe upper end cover, pressure pipe lower end cover, pressure pipe inner wall, pressure pipe lower end cover, pressure pipe upper end cover and pressure pipe lower end cover with the pipe end of pressure pipe is connected through the screw thread that end cover inner wall and pipe end outer wall agreed with mutually respectively and is closed soon, the end cover inner wall has paintd one deck plastics bonding glue, install air valve switch and rubber inflating valve on the pressure pipe upper end cover respectively, air valve switch with manometer tube coupling, pressure pipe lower end cover are equipped with and take the sealing washer lead-through to connect, are surveyed the emulsion explosive cartridge bag and arrange the pressure pipe in, are surveyed emulsion explosive cartridge bag one end and are inserted digital electronic detonator, are surveyed the emulsion explosive cartridge bag and are tied up the probe, and signal transmission electric wire leads to and extend to the outside of tubes from taking the sealing washer lead-through the lead-through in the pressure pipe, and are drawn to and are connected to the detonation velocity instrument from the pressure pipe, and digital electronic detonator initiator is drawn to digital electronic detonator wire.
Further, the rubber inflating valve is connected with an air pump through a pipeline. Air is forgotten to be input into the pressure tube through the air pump, and the pressure intensity in the pressure tube can be adjusted according to the requirement.
Further, the inflating valve comprises an end cover and a core rod, wherein the two ends of the core rod are respectively provided with an air faucet and a connecting part with a groove, the end cover is detachably connected with the air faucet through threads, and the connecting part is fixedly connected with the upper end cover of the pressure pipe through glue.
Furthermore, four sealing ring wire connectors which are consistent in specification and model and used for conducting a signal transmission wire and a digital electronic detonator lead wire are arranged on the lower end cover of the pressure pipe. And drilling a round hole matched with the outer diameter of the spiral of the body with the sealing ring wire joint at the lower end cover of the pressure pipe, and tightly attaching the sealing ring and the round hole through the nut clamp to complete the installation of the wire joint with the sealing ring on the lower end cover of the pressure pipe.
Further, an air valve switch, a pressure gauge and a rubber inflating valve are mounted on the upper end cover of the pressure pipe. Air valve switch one end links to each other with the manometer, and the other end links to each other with pressure pipe upper end cover, drills out two round holes that agree with mutually with air valve switch joint and inflating valve junction circle external diameter size respectively at pressure pipe upper end cover, is connected air valve switch and inflating valve through the round hole that corresponds the size and the pressure pipe upper end cover, for guaranteeing the device gas tightness, paints one deck plastics bonding glue at the round hole perisporium, accomplishes the installation of pressure pipe upper end cover. The inflating valve is made of natural rubber, and a core rod of the inflating valve is made of aluminum alloy.
Further, the pressure in the pressure pipe is 0-8 kg/square meter. Specifically, when the length of the pressure pipe is 2 meters and the pipe diameter is 90 centimeters, the pressure range which can be simulated by the pressure pipe is 0-4 kilograms per square meter, and the pressure which can be stressed by the pressure pipe and simulated explosive can extend out within 40 meters of water depth. When a pressure pipe with a larger pipe diameter is selected, the pressure intensity of a deeper water area can be simulated.
Furthermore, the detonation velocity instrument adopts an intelligent five-section detonation velocity instrument. Preferably, the detonation velocity instrument is a BSW-3A type intelligent five-section detonation velocity instrument.
Furthermore, probes are respectively tied at A, B, C points which are arranged on the emulsion explosive charge to be tested at intervals, and the probes at A, B, C points are respectively connected with No. 1, no. 2 and No. 3 signal input ends of the detonation velocity instrument through the signal transmission wires. Three probes measure data more accurately than two probes.
Further, the through line joint with the sealing ring is composed of a nut, a sealing ring, a body, a clamping ring and a packing head, the nut and the sealing ring are arranged at one end of the body, the clamping ring and the packing head are arranged at the other end of the body, one end of the nut is arranged in the pressure pipe, one end of the packing head is arranged outside the pipe, the sealing ring is tightly attached to a circular hole of the end cover through clamping of the nut, a signal transmission electric wire penetrates through the through line joint with the sealing ring, the signal transmission electric wire is also tightly clamped with the rubber clamping ring when the packing head and the clamping ring are screwed, the lower end cover of the pressure pipe is drilled with a circular hole which is matched with the spiral outer diameter of the through line joint body with the sealing ring, a layer of plastic bonding glue is smeared on the peripheral wall of the circular hole, the through line joint body with the sealing ring passes through the circular hole and is fixed with the lower end cover of the pressure pipe through threads and the glue.
Another aspect of the present application: the method for measuring the detonation velocity of the emulsion explosive under the static pressure condition comprises the following steps:
the rock emulsion explosive is continuously loaded as a test emulsion explosive cartridge bag, and the detonation velocity of the type of explosive under normal pressure is not less than 3.2 multiplied by 10 3 m/s，
(1) Inserting one end of the detected emulsion explosive charge into a digital electronic detonator, arranging A, B, C probes at equal intervals, and then placing the detected emulsion explosive charge into a pressure tube;
(2) Connecting the probe with an explosion velocity instrument by using a signal transmission wire, filling water into the pressure tube from the upper end of the pressure tube, and covering the upper end of the pressure tube;
(3) After the pressure pipe is filled with water and sealed, inflating the pressure pipe through a rubber inflating valve of an upper end cover of the pressure pipe to apply certain pressure, monitoring the pressure value in the pipe by a pressure gauge, and opening an air valve switch to release excessive air when the pressure pipe is excessively inflated;
(4) After pressurization is finished, placing the detonation velocity measuring device in water, opening the detonation velocity meter and setting the detonation velocity meter to be in a test state, and detonating the detonator by using the digital electronic detonator initiator;
(5) After the explosive package is detonated, the detonation velocity instrument measures the propagation time t1 and t2 of the detonation wave at the point A and the point B and the point C, the obtained time is divided by the distance h1 and the distance h2 between the two points respectively to measure and calculate the detonation velocity, and the formula is v1= h1/t1, and v2= h2/t2. And taking the average value of the two detonation velocities as the detonation velocity of the emulsion explosive under the pressure, wherein v = (v 1+ v 2)/2, wherein v is the detonation velocity value of the emulsion explosive, h is the propagation distance of the detonation wave, and t is the propagation time of the detonation wave.
Furthermore, the implementation place of the measuring method is selected from an outdoor temporary cofferdam still water area where no water conservancy project operation is carried out and no masses develop fishing activities. Preferably, the pressure pipe is arranged in a water area with the depth of more than 2 meters under water for detonation, so that the harmful effect of the test is reduced, the explosion noise is reduced, and the adverse effect of the test on the environment is reduced.
The invention has the outstanding advantages that:
1. the explosion velocity measuring device provided by the invention has the advantages that all the components are materials commonly used in life or explosion sites and are easy to obtain, and the used rubber inflating valve and the wire joint with the sealing ring can ensure good air tightness of the device and can simulate the pressure condition of a deep water area.
2. The setting of the detonation velocity measuring device can apply any amount of gas into the pressure pipe, the pressure pipe is inflated through the rubber inflating valve, and the gas valve switch can be opened to release excessive gas when the pressure pipe is excessively inflated, so that the pressure intensity of the emulsion explosive at different water depths can be truly and accurately simulated. Compared with the method of only filling water into the pressure pipe, the device can simulate the water pressure condition of dozens of meters underwater, and can better measure and calculate whether the explosive will be rejected when the pressure is strong.
3. The method for measuring the detonation velocity reflects the detonation performance of the emulsion explosive in the corresponding water depth by measuring the detonation velocity of the emulsion explosive under a certain pressure, provides a method for measuring the compression resistance of the emulsion explosive under the deep water pressure, and prepares for smooth blasting work.
4. The explosion velocity measuring method is implemented by selecting an outdoor temporary cofferdam still water area without water conservancy project operation and fishing activities developed by people, and putting the pressure pipe in a water area more than 2 meters underwater for explosion, so that the harmful effect of the test is reduced, the explosion noise is reduced, and the adverse effect of the test on the environment is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for measuring the detonation velocity of an emulsion explosive according to the present invention under a static pressure condition.
FIG. 2 is a schematic structural view of an upper end cover of a pressure pipe of the explosive velocity measuring device for the emulsion explosive under the static pressure condition.
Fig. 3 is a right side view of fig. 2.
FIG. 4 is a schematic structural view of a lower end cover of a pressure pipe of the device for measuring the detonation velocity of the emulsion explosive under the static pressure condition.
Fig. 5 is a right side view of fig. 4.
FIG. 6 is a schematic diagram of a disassembled structure of a through wire joint with a sealing ring of the device for measuring the detonation velocity of the emulsion explosive under the static pressure condition.
FIG. 7 is a schematic view showing the external structure of a rubber valve of an apparatus for measuring the detonation velocity of an emulsion explosive according to the present invention under a static pressure condition.
Labeled in the figure as: the device comprises a pressure gauge 1, a rubber inflating valve 2, a pressure pipe upper end cover 3, a pressure pipe lower end cover 4, a pressure pipe 5, a digital electronic detonator 6, a probe 7, a detected emulsion explosive package 8, a lead wire connector 9 with a sealing ring, a signal transmission electric wire 10, a digital electronic detonator lead wire 11, an air valve switch 12, an end cover 2-1, an air tap 2-2, a joint 2-3, a nut 9-1, a sealing ring 9-2, a body 9-3, a clamping ring 9-4 and a packing head 9-5.
Detailed Description
The technical solution of the present invention will be further clearly and completely described below with reference to the accompanying drawings and examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 7, the present embodiment is an apparatus for measuring the detonation velocity of an emulsion explosive under a static pressure condition according to the present invention, and the apparatus comprises: the device comprises a pressure gauge 1, an air valve switch 12, a rubber inflating valve 2, a pressure pipe upper end cover 3, a pressure pipe lower end cover 4, a pressure pipe 5, a digital electronic detonator 6, a probe 7, a detected emulsion explosive charge 8, a lead wire connector 9 with a sealing ring, a signal transmission wire 10 and a digital electronic detonator lead wire 11. The concrete structure and the connection relation of the components are as follows:
5 one end of pressure pipe 5 is connected with pressure pipe upper end cover 3, and the other end is connected with pressure pipe lower end cover 4, pressure pipe upper end cover 3 and pressure pipe lower end cover 4 with the pipe end of pressure pipe 5 is connected through the screw thread that end cover inner wall and pipe end outer wall agree with mutually soon respectively, for guaranteeing the device gas tightness, paints one deck plastics bonding glue at the end cover inner wall. Install air valve switch 12 and rubber inflating valve 2 on the pressure pipe upper end cover 3, air valve switch 12 with 1 tube coupling of manometer, pressure pipe lower end cover 4 is equipped with and takes sealing washer lead-through joint 9, in 5 pressure pipes were placed in to the emulsion explosive cartridge 8 of being surveyed, digital electronic detonator 6 is inserted to the 8 left ends of emulsion explosive cartridge of being surveyed, it has tied up probe 7 to be surveyed emulsion explosive cartridge 8, signal transmission electric wire 10 switches on and extends to outside of the tubes from 5 pressure pipes through taking sealing washer lead-through joint 9 with digital electronic detonator wire 11, signal transmission electric wire 10 is from leading-out in pressure pipe 5 and is connected to the detonation velocity instrument, digital electronic detonator wire 11 is from leading-out in pressure pipe 5 and is connected to digital electronic detonator initiator. As shown in fig. 1.
The outer part of the rubber inflating valve 2 is made of natural rubber, and the inner core rod is made of aluminum alloy. Specifically, the inflating valve comprises an end cover 2-1 and a core rod, the core rod is of an integral external structure, two ends of the core rod 2-1 are respectively provided with an air tap 2-2 and a connection part 2-3 with a groove, the end cover 2-1 is detachably connected with the air tap 2-2 through threads, and the connection part 2-3 is fixedly connected with the upper end cover 3 of the pressure pipe through glue. When in use, the pressure pipe 5 is inflated by the air pump and the rubber inflating valve 2, and the end cover 2-1 seals the inflating valve 2-2 after the inflation is finished. As shown in fig. 7.
The lower end cover 4 of the pressure pipe is provided with four sealing ring wire connectors 9 with the same specification and model. The lead joint 9 with the sealing ring is used for conducting a signal transmission wire 10 and a digital electronic detonator lead wire 11. As shown in fig. 4-5.
The pressure pipe 5, the upper end cover 3 of the pressure pipe and the lower end cover 4 of the pressure pipe are made of hard PVC plastic.
The length of the pressure pipe 5 is 2 meters, and the pipe diameter is 90 centimeters.
The lead wire connector 9 with the sealing ring comprises a nut 9-1, a sealing ring 9-2, a body 9-3, a clamping ring 9-4 and a packing head 9-5, the nut 9-1 and the sealing ring 9-2 are arranged at the left end of the body, the clamping ring 9-4 and the packing head 9-5 are arranged at the right end of the body 9-3, one end of the nut 9-1 is arranged in a pipe, one end of the packing head 9-5 is arranged outside the pipe, the sealing ring 9-2 is tightly attached to a circular hole of an end cover through clamping of the nut 9-1, a signal transmission wire 10 penetrates through the lead wire connector 9 with the sealing ring, the signal transmission wire 10 is also clamped with the rubber clamping ring 9-4 when the packing head 9-5 and the clamping ring 9-4 are screwed, four circular holes matched with the spiral outer diameter of the lead wire connector body 9-3 are drilled in the lower end cover 4 of the pressure pipe, and the body 9-3 passes through the circular holes.
And the sealing ring 9-2 and the clamping ring 9-4 of the through wire joint 9 with the sealing ring are made of rubber materials. As shown in fig. 6.
Probes 7 are respectively tied at A, B, C of the emulsion explosive cartridge 8 to be tested, a probe A, B, C is respectively connected with signal input ends of the detonation velocity instruments 1, 2 and 3 through the signal transmission wire 10, and the probe 7 is a thin metal wire. AB. BC intervals are all 0.4 meters, i.e. h1= h2=0.4m.
It should be noted that the difficulty of setting the detonation velocity measuring device in this embodiment is to ensure the airtightness of the device. Because the pressure in the pressure pipe 5 is controlled in the explosion velocity measuring process, the constant pressure in the pressure pipe 5 is ensured in the test process to simulate the pressure of explosive received at different water depths, and the rubber inflating valve 2 and the wire joint 9 with the sealing ring are used in the installation process of the explosion velocity measuring device to ensure good air tightness of the device.
Example 2
The embodiment is a method for measuring the detonation velocity of the emulsion explosive under the static pressure condition, which comprises the following steps:
in this example, 4 sections of No. 2 rock emulsion explosive with the diameter of 32 mm are continuously charged as the test emulsion explosive cartridge 8, and the explosion velocity of the type of explosive is not less than 3.2 multiplied by 10 under normal pressure 3 m/s。
(1) Inserting one end of a detected emulsion explosive charge 8 into a digital electronic detonator 6, arranging probes 7 at equal intervals, and placing the probes in a pressure pipe 5;
(2) Connecting the probe 7 with an explosion velocity instrument by using a signal transmission wire 10, filling water into the pressure tube from the upper end of the pressure tube 5, and covering the upper end cover 3 of the pressure tube;
(3) After the pressure pipe 5 is filled with water and sealed, the pressure pipe 5 is inflated through a rubber inflating valve 2 of an upper end cover 3 of the pressure pipe to apply certain pressure, a pressure gauge monitors the pressure value in the pipe, and when the pressure is excessively inflated, an air valve switch 12 is opened to release excessive gas;
(4) After pressurization, placing the detonation velocity measuring device at the depth of 2m, opening the detonation velocity instrument and setting the detonation velocity instrument in a test state, and detonating the detonator 6 by using a digital electronic detonator initiator;
(5) After the explosive cartridge is detonated, the detonation velocity instrument measures the propagation time t1 and t2 of the detonation wave at the point A and the point B and the point C, the obtained time is divided by the distance h1 and the distance h2 between the two points respectively to measure and calculate the detonation velocity, and the formula is v1= h1/t1, and v2= h2/t2. And taking the average value of the detonation velocities of the two times as the detonation velocity of the emulsion explosive under the pressure, wherein v = (v 1+ v 2)/2, wherein v is the detonation velocity value of the emulsion explosive, h is the propagation distance of the detonation wave, and t is the propagation time of the detonation wave.
In the present embodiment, the location is selected in the outdoor temporary cofferdam stagnant water area where no construction work is available and no fishing activities are performed by the masses. During the test, the detonation velocity measuring device is arranged at the position of 2m water depth for carrying out the underwater test, and the reason for carrying out the underwater test is as follows: the embodiment is a test for determining the explosive explosion velocity, and does not explode objects, water has a buffering effect, when the explosive explodes in the water, the water can uniformly transmit explosion energy and pressure, the harmful effect of the explosion test is reduced, the explosion noise is reduced, and the adverse effect of the test on the environment is reduced. The embodiment is carried out when the process needs to fill water into the pressure pipe and aims to place the device in the depth of 2 meters of water, so that the device is beneficial to sinking below the water surface.
Example 3
Based on the above embodiments, as shown in fig. 1 to 7, in order to measure the detonation velocity of the emulsion explosive under different static pressure conditions to simulate the detonation performance of the emulsion explosive under different Cheng Su pressures at different water depths, the detonation velocity measuring device and the measuring method of the emulsion explosive are used in this embodiment to measure the detonation velocity of the emulsion explosive. In this example no additional pressure was applied to the pressure tube 5 and as a control test the control test explosive exploded at a depth of 2 m. The control test set in this embodiment aims to qualitatively compare the explosion effect of the emulsion explosive at shallow water with that of the emulsion explosive at deep water, and analyze whether the explosion performance of the emulsion explosive at different depths of water is greatly influenced by water pressure. After the explosion is finished, comparing with the explosive charge of the test, completely exploding, measuring the propagation time t1=76us of the detonation wave at the AB section and the propagation time t2=97.2us of the detonation wave at the BC section by a detonation velocity meter, dividing the obtained propagation time by the distance h1 and h2 between the two points respectively to obtain the detonation velocity, wherein the detonation velocity is v1= h1/t1=5.3 multiplied by 10, and the detonation velocity is v1= h1/t1 3 m/s，v2=h2/t2=4.1×10 3 m/s, the detonation velocity of the emulsion explosive is measured by a control test to be v = (v 1+ v 2)/2 =4.7 multiplied by 10 3 m/s。
Example 4
Based on the above embodiments, as shown in fig. 1 to 7, in order to measure the detonation velocity of the emulsion explosive under different static pressure conditions to simulate the detonation performance of the emulsion explosive under different Cheng Su pressures at different water depths, the device and the method for measuring the detonation velocity of the emulsion explosive are used in this embodiment. In this embodiment, air pressure is applied to the pressure pipe 5, and the pressure value is set to 2 kg/cm, which is equivalent to the pressure of explosive at a depth of 20m water. After the explosion is finished, only the digital electronic detonator 6 and the part of the test explosive package close to one end of the digital electronic detonator 6 explode in the embodiment, the probe 7 is intact, and the data is not detected by the detonation velocity instrument.
Example 5
Based on the above embodiments, as shown in fig. 1 to 7, in order to measure the detonation velocity of the emulsion explosive under different static pressure conditions to simulate the detonation performance of the emulsion explosive under different Cheng Su pressures at different water depths, the device and the method for measuring the detonation velocity of the emulsion explosive are used in this embodiment. In this embodiment, air pressure is applied to the pressure pipe 5, and the pressure value is set to 3 kg/cm, which is equivalent to the pressure of explosive at a depth of 30m water. After the explosion is finished, only the digital electronic detonator 6 explodes, the test explosive package does not explode, the probe 7 is intact, and the data is not detected by the detonation velocity meter.
The determination results of the above embodiments show that the emulsion explosive has high detonation velocity when exploding in shallow water, the explosive still maintains the characteristics of large power, high sensitivity and good water resistance, and the explosive performance of the emulsion explosive is not greatly influenced by strong pressure at shallow positions in water. When the pressure is applied to the water depth of 20m, the emulsion explosive is not completely exploded; when the pressure intensity of the water depth of 30m is applied, the emulsion explosive does not explode, and the larger the pressure intensity is, the larger the influence on the explosion performance of the emulsion explosive is. The pressure intensity is increased, the sensitivity of the emulsion explosive is reduced, and the phenomena of blind blasting and explosive misfiring are easy to occur during blasting. Therefore, the invention provides a device and a method for measuring the detonation velocity of an emulsion explosive under a static pressure condition, which are used for carrying out detonation velocity test on an emulsion explosive cartridge before deepwater blasting operation, reflecting the water resistance, compression resistance and explosion performance of the emulsion explosive, and providing a basis for selecting proper emulsion explosive for blasting operation and ensuring the smooth blasting operation.
The foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The device for measuring the detonation velocity of the emulsion explosive under the static pressure condition is characterized in that the components comprise: manometer, air valve switch, rubber inflating valve, pressure pipe upper end cover, pressure pipe lower end cover, pressure pipe, digital electronic detonator, probe, the emulsion explosive cartridge bag of being surveyed, take the sealing washer lead wire to connect, signal transmission electric wire and digital electronic detonator wire, the concrete structure and the connection relation of component parts are:
the utility model discloses a pressure pipe, including pressure pipe upper end cover, pressure pipe inner wall, pressure pipe upper end cover, pressure pipe lower end cover, pressure pipe inner wall, pressure pipe lower end cover, pressure pipe upper end cover and pressure pipe lower end cover with the pipe end of pressure pipe is connected through the screw thread that end cover inner wall and pipe end outer wall agreed with mutually respectively and is closed soon, the end cover inner wall has paintd one deck plastics bonding glue, install air valve switch and rubber inflating valve on the pressure pipe upper end cover respectively, air valve switch with manometer tube coupling, pressure pipe lower end cover are equipped with and take the sealing washer lead-through to connect, are surveyed the emulsion explosive cartridge bag and arrange the pressure pipe in, are surveyed emulsion explosive cartridge bag one end and are inserted digital electronic detonator, are surveyed the emulsion explosive cartridge bag and are tied up the probe, and signal transmission electric wire leads to and extend to the outside of tubes from taking the sealing washer lead-through the lead-through in the pressure pipe, and are drawn to and are connected to the detonation velocity instrument from the pressure pipe, and digital electronic detonator initiator is drawn to digital electronic detonator wire.
2. The apparatus for measuring the detonation velocity of an emulsion explosive under a static pressure condition according to claim 1, wherein the rubber valve is connected to an air pump through a pipeline.
3. The device for measuring the detonation velocity of the emulsion explosive under the static pressure condition according to claim 1, wherein the inflating valve comprises an end cover and a core bar, the two ends of the core bar are respectively provided with an air tap and a connecting part with a groove, the end cover is detachably connected with the air tap through threads, and the connecting part is fixedly connected with the upper end cover of the pressure pipe through glue.
4. The device for measuring the detonation velocity of the emulsion explosive under the static pressure condition according to claim 1, wherein the lower end cover of the pressure pipe is provided with four sealing ring wire connectors which are consistent in specification and model and are used for conducting a signal transmission wire and a digital electronic detonator wire, a round hole matched with the spiral outer diameter of a body with the sealing ring wire connectors is drilled on the lower end cover of the pressure pipe, and a nut is used for clamping to enable the sealing ring to be tightly attached to the round hole, so that the installation of the sealing ring wire connectors on the lower end cover of the pressure pipe is completed.
5. An emulsion explosive detonation velocity measuring device under static pressure conditions as claimed in claim 1, wherein the upper end cover of the pressure tube is provided with an air valve switch and a rubber inflating valve, one end of the air valve switch is connected with the pressure gauge, the other end of the air valve switch is connected with the upper end cover of the pressure tube, two round holes matched with the outer diameters of the joints of the air valve switch and the inflating valve respectively are drilled on the upper end cover of the pressure tube, the air valve switch and the inflating valve are connected with the upper end cover of the pressure tube through the round holes with corresponding sizes, and a layer of plastic bonding glue is smeared on the peripheral wall of each round hole.
6. The apparatus for measuring the detonation velocity of an emulsion explosive under static pressure conditions according to claim 1, characterised in that the pressure in said pressure tube is between 0 and 8 kg/m.
7. The device for measuring the detonation velocity of the emulsion explosive under the static pressure condition according to claim 1, wherein probes are respectively tied at A, B, C which are arranged on the explosive package of the emulsion explosive to be measured at intervals, and the probes at A, B, C are respectively connected with No. 1, no. 2 and No. 3 signal input ends of a detonation velocity instrument through the signal transmission electric wires.
8. The emulsion explosive detonation velocity measuring device under the static pressure condition according to claim 1, wherein the threading joint with the sealing ring is composed of a nut, a sealing ring, a body, a clamping ring and a pressing head, the nut and the sealing ring are arranged at one end of the body, the clamping ring and the pressing head are arranged at the other end of the body, one end of the nut is arranged in the pressure pipe, one end of the pressing head is arranged outside the pipe, the sealing ring is tightly attached to a round hole of the end cover by clamping the nut, a signal transmission wire passes through the threading joint with the sealing ring, the signal transmission wire is also tightly clamped with the rubber clamping ring when the pressing head and the clamping ring are screwed, the lower end cover of the pressure pipe is drilled with a round hole matched with the outer diameter of the screw of the threading joint body with the sealing ring, a layer of plastic bonding glue is coated on the peripheral wall of the round hole, the body of the threading joint with the sealing ring passes through the round hole and is fixed with the lower end cover of the pressure pipe by threads and the glue.
9. A method of measuring the detonation velocity measuring apparatus for an emulsion explosive according to claims 7 to 8 under static pressure, comprising the steps of:
the rock emulsion explosive is continuously loaded as a test emulsion explosive cartridge bag, and the detonation velocity of the type of explosive under normal pressure is not less than 3.2 multiplied by 10 3 m/s，
(1) Inserting one end of the detected emulsion explosive charge into a digital electronic detonator, arranging A, B, C probes at equal intervals, and then placing the detected emulsion explosive charge into a pressure tube;
(2) Connecting the probe with an explosion velocity instrument by using a signal transmission wire, filling water into the pressure tube from the upper end of the pressure tube, and covering the upper end of the pressure tube;
(3) After the pressure pipe is filled with water and sealed, the pressure pipe is inflated through a rubber inflating valve on an upper end cover of the pressure pipe to apply certain pressure, a pressure gauge monitors the pressure value in the pipe, and if the pressure is inflated excessively, an air valve switch is opened to release excessive air;
(4) After pressurization is finished, placing the detonation velocity measuring device in water, opening the detonation velocity meter and setting the detonation velocity meter to be in a test state, and detonating the detonator by using the digital electronic detonator initiator;
(5) After the explosive cartridge is detonated, the detonation velocity instrument measures the propagation time t1 and t2 of the detonation wave at the point A and the point B and the point C, the obtained time is divided by the distance h1 and h2 between the two points respectively to measure and calculate the detonation velocity, the formula is v1= h1/t1, v2= h2/t2, the average value of the two detonation velocities is taken as the detonation velocity of the emulsified explosive under the pressure, v = (v 1+ v 2)/2, wherein v is the detonation velocity value of the emulsified explosive, h is the propagation distance of the detonation wave, and t is the propagation time of the detonation wave.
10. The method according to claim 9, wherein the measurement is performed at a place selected from an outdoor temporary cofferdam and a still water area where no construction work is performed and no masses are present to perform the fishing activities.
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