CN111007276A - In-hole explosion speed testing device for on-site mixed emulsion explosive and working method thereof - Google Patents
In-hole explosion speed testing device for on-site mixed emulsion explosive and working method thereof Download PDFInfo
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- CN111007276A CN111007276A CN201911146398.9A CN201911146398A CN111007276A CN 111007276 A CN111007276 A CN 111007276A CN 201911146398 A CN201911146398 A CN 201911146398A CN 111007276 A CN111007276 A CN 111007276A
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- 238000012360 testing method Methods 0.000 title claims abstract description 68
- 238000004880 explosion Methods 0.000 title claims abstract description 34
- 239000002360 explosive Substances 0.000 title claims abstract description 34
- 239000000839 emulsion Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 19
- 238000005474 detonation Methods 0.000 claims abstract description 45
- 239000000523 sample Substances 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 238000004945 emulsification Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 2
- 239000012945 sealing adhesive Substances 0.000 claims description 2
- 238000005422 blasting Methods 0.000 abstract description 6
- 239000002390 adhesive tape Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/227—Explosives, e.g. combustive properties thereof
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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
An in-hole explosion velocity testing device for on-site mixed emulsion explosives comprises an explosion velocity instrument, a testing probe, a balancing weight and a testing line; the test probe comprises a pipe fitting, and the outer walls of two ends of the pipe fitting are respectively provided with a load bearing hole and a weight balancing hole; the outer wall of the pipe fitting is circumferentially provided with a first target point fixing groove and a second target point fixing groove respectively, the first target point fixing groove and the second target point fixing groove are located between the bearing hole and the counterweight hole respectively, the first target point fixing groove is close to the bearing hole, and the second target point fixing groove is close to the counterweight hole. Because the detonation velocity is directly measured in the blast hole, the extra-hole test is not needed before blasting, the noise disturbing the people is avoided, and the working efficiency is improved.
Description
Technical Field
The invention relates to the field of mine blasting, in particular to a hole implosion speed testing device for on-site mixed emulsion explosives and a working method thereof.
Background
The explosive detonation velocity is one of indexes for directly reflecting the performance reliability of explosives, and the conventional mixed emulsion explosive detonation velocity test mainly adopts an ex-hole test, namely a probe method for testing, and has the following problems: 1, blasting noise disturbs citizen seriously; 2. after the explosive is loaded into the blast hole, the explosion speed of the explosive outside the hole cannot reflect the explosion real performance of the explosive in the blast hole due to the restriction effect of the hole wall; 3. the testing process is complicated, and the potential safety hazard is big, need in the car pharmacy process of loading in mixture, after getting it filled with PVC pipe alone, the extraforaminous blasting test is carried out in alternative place remote place, and the process is complicated, and the potential safety hazard is big. A small amount of in-hole detonation velocity meters are arranged abroad, the equipment is complex to operate, inconvenient to carry and high in price, and the in-hole detonation velocity meters are generally used in scientific research projects and cannot be applied to the periodic test process of blasting operation units.
Disclosure of Invention
The invention provides a device for testing the in-hole explosion speed of a field mixed emulsion explosive and a working method thereof, aiming at the defects of the prior art.
Wherein, a concrete technical scheme of on-spot mixed loading emulsification explosive is with downthehole detonation velocity testing arrangement as follows:
the utility model provides an on-spot muddy dress emulsification is downthehole explosion velocity testing arrangement for explosive which characterized in that: comprises an explosion velocity instrument (1), a test probe, a balancing weight (3) and a test wire;
the test probe comprises a pipe fitting (2), and the outer walls of two ends of the pipe fitting (2) are respectively provided with a bearing hole (4) and a balance weight hole (5);
a first target point fixing groove (6) and a second target point fixing groove (7) are respectively formed in the outer wall of the pipe fitting (2) along the circumferential direction, the first target point fixing groove (6) and the second target point fixing groove (7) are respectively located between the bearing hole (4) and the counterweight hole (5), the first target point fixing groove (6) is close to the bearing hole (4), and the second target point fixing groove (7) is close to the bearing hole (4);
a strip-shaped groove (11) is formed in the outer wall of the pipe fitting (2) along the axial direction, and two ends of the strip-shaped groove (11) are respectively communicated with the first target point fixing groove (6) and the second target point fixing groove (7);
the test line comprises a first target line (8), a second target line (9) and a common conducting wire (10);
the first target wire (8) and the common conducting wire (10) are twisted with each other in a twist shape to form a first measuring wire, and the first measuring wire is wound in the first target point fixing groove (6);
the second target wire (9) and the common conducting wire (10) are twisted with each other in a twist shape to form a second measuring wire, and the second measuring wire is wound in the second target point fixing groove (7);
the free ends of the first target wire (8), the second target wire (9) and the common lead (10) are respectively connected with a measuring port group of the detonation velocity instrument (1).
Further: target line fixing pieces (12) are respectively arranged at two ends in the strip-shaped groove (11).
Further: the counterweight hole (5) is connected with one end of a counterweight line, and the other end of the counterweight line is connected with a counterweight.
Further: and sealing devices are respectively arranged on the winding parts of the first measuring line and the second measuring line.
Further: the sealing device is a sealing adhesive tape.
The specific technical scheme of the working method of the in-hole explosion velocity testing device for the on-site mixed emulsion explosive comprises the following steps:
a working method of a hole explosion velocity testing device for on-site mixed emulsion explosives is characterized in that: comprises the following steps:
s1: twisting a first target wire (8) and a common wire (10) into a twist shape to form a first measuring wire;
s2: winding the first measurement in a first target point fixing groove (6), and fixing the first measurement by using an insulating tape;
s3: twisting a second target wire (9) and a common wire (10) into a twist shape to form a second measuring wire;
s4: winding the second measurement in a second target point fixing groove (7), and fixing by using an insulating tape;
s5: a fastening line (16) is arranged in the strip-shaped groove (11), and the first measuring line and the second measuring line are fastened on the pipe fitting (2) through the fastening line (16);
s6: measuring to obtain a target distance S between the first target point fixing groove (6) and the second target point fixing groove (7);
s7: selecting a test hole (13), and putting an initiating explosive package into the test hole (13);
s8: vertically placing the testing device in the middle of the testing hole (13), wherein the first target point fixing groove (6) is positioned below;
s9: charging, plugging and networking the test holes (13);
s10: connecting the free ends of the first target wire (8), the target wire and the common lead (10) with a measurement port group of the velocimeter respectively;
s11: the velocimeter measures the explosion velocity to obtain the explosion velocity D in the holepj；
S12: correcting the detonation velocity error to obtain the actual detonation velocity value D in the holeC。
Further: the method comprises the following steps:
the S11 includes the following steps:
s111: starting a detonation velocity instrument;
s112: clicking the target distance, setting the target distance to be delta S, and setting the target distance to be mm;
s113: the click time base is set as us;
S114：click measurement is carried out, and the detonation velocity D in the hole is obtainedpj。
Further: the specific steps of S12 are as follows:
in the formula, DCΔ S is a distance between the first target point fixing groove and the second target point fixing groove, η is a measurement error which is a difference between a set value and an actual value, D is an actual hole detonation velocity value after error correctionpjThe value of the detonation velocity in the hole is obtained by measurement.
The invention has the beneficial effects that: first, because directly carry out the detonation velocity survey in the blast hole, need not to adopt the extraforaminiferous test alone in addition before the blasting again, avoided the noise to disturb the people, improved work efficiency simultaneously.
Secondly, a test probe and a detonation velocity meter are adopted, the test probe comprises a pipe fitting, a first target point fixing groove and a second target point fixing groove are formed in the pipe fitting, the time delta t of detonation waves passing through the first target point fixing groove and the second target point fixing groove during detonation is measured by measuring the distance delta S between the first target point fixing groove and the second target point fixing groove, and the time delta t of detonation waves passing through the first target point fixing groove and the second target point fixing groove is measured by measuring the distance delta S between the first target point fixing groove and
and obtaining the explosion velocity in the hole.
Thirdly, adopt
And correcting the actual in-hole detonation velocity of the mixed emulsion explosive to obtain a real detonation velocity value.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic representation of the use of the present invention;
the figure numbers are illustrated as an explosion velocity instrument 1, a pipe fitting 2, a balancing weight 3, a bearing hole 4, a balance weight hole 5, a first target point fixing groove 6, a second target point fixing groove 7, a first target line 8, a second target line 9, a common lead 10, a strip-shaped groove 11, a target line fixing piece 12, a test hole 13, explosive 14, an initiator 15 and a fastening line 16.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and will therefore make the scope of the invention more clearly and clearly defined.
As shown in fig. 1 and 2: an in-hole explosion velocity testing device for on-site mixed emulsion explosives comprises an explosion velocity instrument 1, a testing probe, a balancing weight 3 and a testing line;
the test probe comprises a pipe fitting 2, the pipe fitting 2 adopts a PP-R pipe, and the outer walls of two ends of the pipe fitting 2 are respectively provided with a weight bearing hole 4 and a weight bearing hole 5;
one end of a counterweight line is connected in the counterweight hole 5, and the other end of the counterweight line is connected with the counterweight block 3.
A first target point fixing groove 6 and a second target point fixing groove 7 are respectively formed in the outer wall of the pipe fitting 2 along the circumferential direction, the first target point fixing groove 6 and the second target point fixing groove 7 are respectively located between the bearing hole 4 and the counterweight hole 5, the first target point fixing groove 6 is close to the bearing hole 4, the second target point fixing groove 7 is close to the bearing hole 4, and the width and the depth of the first target point fixing groove 6 and the second target point fixing groove 7 are about 1mm in the implementation;
a strip-shaped groove 11 is axially formed in the outer wall of the pipe fitting 2, and two ends of the strip-shaped groove 11 are respectively communicated with the first target point fixing groove 6 and the second target point fixing groove 7;
the test lines comprise a first target line 8, a second target line 9 and a common conducting line 10;
the first target wire 8 and the common lead 10 are twisted with each other in a twist shape to form a first measuring wire, the first measuring wire is wound in the first target point fixing groove 6, the second target wire 9 and the common lead 10 are twisted with each other in a twist shape to form a second measuring wire, the second measuring wire is wound in the second target point fixing groove 7, the number of winding turns is 2-3, and in the embodiment, the length range of the first measuring wire and the second measuring wire is 300-500 mm;
sealing devices are respectively arranged on the winding parts of the first measuring line and the second measuring line. Here, the sealing device employs a sealing tape, and the ends of the first target wire 8 and the second target wire 9 are respectively wound with the sealing tape to be insulated.
The two ends in the strip-shaped groove 11 are respectively provided with a target line fixing piece 12. The target line fixing plate 12 is used for limiting the first measuring line and the second measuring line.
The free ends of the first target line 8, the target line and the common conductor 10 are respectively connected with a measuring port group of the detonation velocity instrument 1.
The working principle of the invention is as follows: the detonation wave is generated when explosive explodes, huge heat is generated when the detonation wave is released, the detonation wave passes through a first test line wound in a first target fixing groove, the first target line and a public wire are twisted in a twist shape, and therefore the skins of the first target line and the public wire in the first test line are melted, the first target line and the public wire are in short circuit, after a first electric signal is generated on a detonation velocity instrument, the heat carried by the detonation wave is huge, the first test line in the first target fixing groove is burnt off instantly after the first test line is in short circuit, and therefore the first test line cannot continuously generate the electric signal.
The detonation wave upwards passes through a second test wire wound in a second target point fixing groove, and the principle of generating an electric signal by the second test wire is the same as that of the first test wire. The detonation velocity meter acquires a second electrical signal.
Then using the formula:
in the formula, DCFor the error corrected actual hole detonation velocity value, Δ S is the distance between the first target point fixing groove and the second target point fixing groove, η is the measurement error, DpjMeasuring the obtained explosion velocity value in the hole;
and obtaining the explosion velocity value in the explosion hole.
By means of the formula,
and optimally selecting the distance between the first target point fixing groove and the second target point fixing groove. In the formula, ω is the actual error of the detonation velocity value caused by the unit target distance measurement error. The larger the value of the distance deltas between the first target point fixing groove and the second target point fixing groove is, the smaller the detonation velocity error omega caused by the unit length is.
As shown in fig. 3, a working method of the in-hole explosion velocity testing device for the on-site mixed emulsion explosive comprises the following steps:
s1: mutually twisting the first target wire 8 and the common conducting wire 10 in a twist shape to form a first measuring wire;
s2: winding 2-3 circles of the first measurement in a first target point fixing groove 6, fixing the first measurement in an insulating adhesive tape, and binding and insulating the end of the first target line by using the insulating adhesive tape;
s3: twisting a second target wire 9 and a common wire 10 in a twist shape to form a second measuring wire;
s4: winding the second measurement in a second target fixing groove 7, fixing the second measurement by using an insulating adhesive tape, and binding and insulating the end of the first target wire by using the insulating adhesive tape;
s5: a fastening line 16 is arranged in the strip-shaped groove 11, and the fastening line 16 fastens the first measuring line and the second measuring line on the pipe fitting 2;
s6: measuring to obtain a target distance delta S between the first target point fixing groove 6 and the second target point fixing groove 7;
s7: selecting a test hole 13, and putting an initiating explosive package into the test hole 13;
s8: the testing device is vertically placed in the middle of the testing hole 13, the first target point fixing groove 6 is located below, in the implementation, the distance between the first target point fixing groove 6 and the initiating explosive bag is more than or equal to 3m, so that the explosive can reach stable detonation, and the probe measures the speed of the explosive for stable detonation;
s9: carrying out charging, filling and detonating network connection on the test hole 13;
s10: connecting the free ends of the first target wire 8, the target wire and the common wire 10 with a measurement port group of the velocimeter respectively;
s11: the velocimeter measures the explosion velocity to obtain the explosion velocity D in the measuring holepj；
In this embodiment, the S11 includes the following steps:
s111: starting a detonation velocity instrument;
s112: clicking the target distance, setting the target distance to be delta S, and setting the target distance to be mm;
s113: the click time base is set as us;
s114: click measurement is carried out, and the detonation velocity D in the hole is obtainedpj。
S12: correcting the detonation velocity error to obtain the actual detonation velocity value D in the holeC。
In this embodiment, the step S12 specifically includes the following steps:
S121：
in the formula, DCFor the burst velocity value after the influence of the measurement error of the probe, Δ S is the distance between the first target point fixing groove and the second target point fixing groove, η is the measurement error which is the difference between the set value and the actual value, DpjThe detonation velocity value is given.
Claims (8)
1. The utility model provides an on-spot muddy dress emulsification is downthehole explosion velocity testing arrangement for explosive which characterized in that: comprises an explosion velocity instrument (1), a test probe, a balancing weight (3) and a test wire;
the test probe comprises a pipe fitting (2), and the outer walls of two ends of the pipe fitting (2) are respectively provided with a bearing hole (4) and a balance weight hole (5);
a first target point fixing groove (6) and a second target point fixing groove (7) are respectively formed in the outer wall of the pipe fitting (2) along the circumferential direction, the first target point fixing groove (6) and the second target point fixing groove (7) are respectively located between the bearing hole (4) and the counterweight hole (5), the first target point fixing groove (6) is close to the bearing hole (4), and the second target point fixing groove (7) is close to the bearing hole (4);
a strip-shaped groove (11) is formed in the outer wall of the pipe fitting (2) along the axial direction, and two ends of the strip-shaped groove (11) are respectively communicated with the first target point fixing groove (6) and the second target point fixing groove (7);
the test line comprises a first target line (8), a second target line (9) and a common conducting wire (10);
the first target wire (8) and the common conducting wire (10) are twisted with each other in a twist shape to form a first measuring wire, and the first measuring wire is wound in the first target point fixing groove (6);
the second target wire (9) and the common conducting wire (10) are twisted with each other in a twist shape to form a second measuring wire, and the second measuring wire is wound in the second target point fixing groove (7);
the free ends of the first target wire (8), the second target wire (9) and the common lead (10) are respectively connected with a measurement port group of the detonation velocity instrument (1).
2. The in-hole explosion velocity testing device for the mixed emulsion explosive on site according to claim 1, wherein: target line fixing pieces (12) are respectively arranged at two ends in the strip-shaped groove (11).
3. The in-hole explosion velocity testing device for the mixed emulsion explosive on site according to claim 1, wherein: the counterweight hole (5) is connected with one end of a counterweight line, and the other end of the counterweight line is connected with a counterweight block.
4. The in-hole explosion velocity testing device for the mixed emulsion explosive on site according to claim 1, wherein: sealing devices are respectively arranged on the winding parts of the first measuring line and the second measuring line.
5. The in-hole explosion velocity testing device for the mixed emulsion explosive on site according to claim 1, wherein: the sealing device is a sealing adhesive tape.
6. A working method of a hole explosion velocity testing device for on-site mixed emulsion explosives is characterized in that: the method comprises the following steps:
s1: twisting a first target wire (8) and a common wire (10) into a twist shape to form a first measuring wire;
s2: winding the first measurement in a first target point fixing groove (6), and fixing the first measurement by using an insulating tape;
s3: twisting a second target wire (9) and a common wire (10) into a twist shape to form a second measuring wire;
s4: winding the second measurement in a second target point fixing groove (7), and fixing by using an insulating tape;
s5: a fastening line (16) is arranged in the strip-shaped groove (11), and the fastening line (16) fastens the first measuring line and the second measuring line on the pipe fitting (2);
s6: measuring to obtain a target distance S between the first target point fixing groove (6) and the second target point fixing groove (7);
s7: selecting a test hole (13), and putting an initiating explosive package into the test hole (13);
s8: vertically placing the testing device in the middle of the testing hole (13), wherein the first target point fixing groove (6) is positioned below;
s9: carrying out charging, filling and detonating network connection on the test hole (13);
s10: connecting the free ends of the first target wire (8), the target wire and the common lead (10) with a measurement port group of the velocimeter respectively;
s11: the velocimeter measures the explosion velocity to obtain the explosion velocity value D in the holepj；
S12: correcting the detonation velocity error to obtain the actual detonation velocity value D in the holeC。
7. A working method of a hole explosion velocity testing device for on-site mixed emulsion explosives is characterized in that: the method comprises the following steps:
the S11 includes the following steps:
s111: starting a detonation velocity instrument;
s112: clicking the target distance, setting the target distance to be delta S, and setting the target distance to be mm;
s113: the click time base is set as us;
s114: click measurement is carried out, and the detonation velocity D in the hole is obtainedpj。
8. A working method of a hole explosion velocity testing device for on-site mixed emulsion explosives is characterized in that: the method comprises the following steps:
the specific steps of S12 are as follows:
in the formula, DCΔ S is the distance between the first target point fixing groove and the second target point fixing groove, η is the measurement error which is the difference between the set value and the actual value, D is the actual hole detonation velocity value after error correctionpjThe value of the detonation velocity in the hole is obtained by measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146398.9A CN111007276A (en) | 2019-11-21 | 2019-11-21 | In-hole explosion speed testing device for on-site mixed emulsion explosive and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146398.9A CN111007276A (en) | 2019-11-21 | 2019-11-21 | In-hole explosion speed testing device for on-site mixed emulsion explosive and working method thereof |
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| CN111007276A true CN111007276A (en) | 2020-04-14 |
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| CN201911146398.9A Pending CN111007276A (en) | 2019-11-21 | 2019-11-21 | In-hole explosion speed testing device for on-site mixed emulsion explosive and working method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU110191U1 (en) * | 2011-05-27 | 2011-11-10 | Общество с ограниченной ответственностью Научно-техническая фирма "Взрывтехнология" | DEVICE FOR DETERMINING THE EXPLOSIVE SUBSTANCE CHARGE DETONATION SPEED (OPTIONS) |
| CN104034914A (en) * | 2014-05-26 | 2014-09-10 | 葛洲坝易普力股份有限公司 | Auxiliary device for measuring detonation velocity of emulsified explosive in blast hole |
| CN205581134U (en) * | 2016-04-21 | 2016-09-14 | 宏大矿业有限公司 | System for explosive explosion velocity during on --spot rapid survey deep hole blasting |
| CN107449933A (en) * | 2017-07-06 | 2017-12-08 | 安徽雷鸣科化股份有限公司 | A kind of porous particulated ammonium oil explosive explosion velocity measure device and the method using device measure explosion velocity |
| CN109238049A (en) * | 2018-11-06 | 2019-01-18 | 中国葛洲坝集团易普力股份有限公司 | Device is arranged in the method for measurement on-site mixed explosive explosion velocity and its signal in blast hole |
| CN212228975U (en) * | 2019-11-21 | 2020-12-25 | 葛洲坝易普力四川爆破工程有限公司 | Hole implosion speed testing device for on-site mixed emulsion explosive |
-
2019
- 2019-11-21 CN CN201911146398.9A patent/CN111007276A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU110191U1 (en) * | 2011-05-27 | 2011-11-10 | Общество с ограниченной ответственностью Научно-техническая фирма "Взрывтехнология" | DEVICE FOR DETERMINING THE EXPLOSIVE SUBSTANCE CHARGE DETONATION SPEED (OPTIONS) |
| CN104034914A (en) * | 2014-05-26 | 2014-09-10 | 葛洲坝易普力股份有限公司 | Auxiliary device for measuring detonation velocity of emulsified explosive in blast hole |
| CN205581134U (en) * | 2016-04-21 | 2016-09-14 | 宏大矿业有限公司 | System for explosive explosion velocity during on --spot rapid survey deep hole blasting |
| CN107449933A (en) * | 2017-07-06 | 2017-12-08 | 安徽雷鸣科化股份有限公司 | A kind of porous particulated ammonium oil explosive explosion velocity measure device and the method using device measure explosion velocity |
| CN109238049A (en) * | 2018-11-06 | 2019-01-18 | 中国葛洲坝集团易普力股份有限公司 | Device is arranged in the method for measurement on-site mixed explosive explosion velocity and its signal in blast hole |
| CN212228975U (en) * | 2019-11-21 | 2020-12-25 | 葛洲坝易普力四川爆破工程有限公司 | Hole implosion speed testing device for on-site mixed emulsion explosive |
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