CN107421404B - Method and device for acquiring dynamic and static action relation proportion in explosion process - Google Patents
Method and device for acquiring dynamic and static action relation proportion in explosion process Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000004880 explosion Methods 0.000 title claims abstract description 46
- 230000003068 static effect Effects 0.000 title claims description 20
- 238000012360 testing method Methods 0.000 claims abstract description 204
- 239000002360 explosive Substances 0.000 claims abstract description 56
- 238000005474 detonation Methods 0.000 claims abstract description 49
- 230000000903 blocking effect Effects 0.000 claims description 26
- 238000004364 calculation method Methods 0.000 claims description 11
- 238000003384 imaging method Methods 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005422 blasting Methods 0.000 description 17
- 239000011435 rock Substances 0.000 description 11
- 238000002591 computed tomography Methods 0.000 description 9
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 5
- 239000004926 polymethyl methacrylate Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 150000001540 azides Chemical class 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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Abstract
The embodiment of the invention discloses a method and a device for acquiring a dynamic-static action relation proportion in an explosion process, relates to an explosion technology, and can improve the efficiency of utilizing explosive energy. The method for acquiring the dynamic-static action relation proportion in the explosion process comprises the following steps: obtaining paired test pieces with the same blast hole depth; respectively loading the same amount of the explosive in the paired test pieces and respectively connecting with a detonating lead; plugging the blast hole of one test piece in the pair of test pieces, wherein the blast hole of the other test piece is not plugged; and detonating the paired test pieces, determining the success of detonation, respectively obtaining the volumes of the fracture damage areas of the paired test pieces after detonation, and calculating the dynamic-static action relation proportion based on the obtained volumes of the fracture damage areas.
Description
Technical Field
The invention relates to a blasting technology, in particular to a method and a device for acquiring a dynamic-static action relation proportion in an explosion process.
Background
The blasting technology adopted in the engineering blasting construction process is an important construction operation technical means in the field of civil construction, the existing blasting theory holds that in the blasting process of rock, a stress wave and explosive gas act together to form a blasting crack, the blasting crack is caused by the combined action of the explosive stress wave and explosive gas, namely, after the explosive explodes, the explosive stress wave and the explosive gas are generated, the initial crack in the rock body is caused by the explosive stress wave (dynamic action), then the explosive gas is wedged into the crack initially formed in an exploded target object, and under the action of quasi-static pressure (static action), the crack formed by the explosive stress wave is further expanded, and finally the rock is crushed. However, due to the transient nature of explosion, dynamic and static effects are mixed together, and independent research on the explosion stress wave and the quasi-static pressure of the explosive gas is difficult. Therefore, how to relatively separate the action of the explosive stress wave from the quasi-static action of the explosive gas so as to determine the respective action proportion of the explosive stress wave and the explosive gas in blasting rock breaking has important significance for effectively utilizing explosive energy, ensuring blasting quality, improving blasting efficiency and improving construction efficiency.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for obtaining a dynamic-static action relationship ratio in an explosion process, which can improve efficiency of utilizing explosive energy, so as to solve problems of low effective utilization of explosive energy and low explosion efficiency caused by an inability to obtain the dynamic-static action relationship ratio in an existing explosion method.
In a first aspect, an embodiment of the present invention provides a method for obtaining a dynamic-static action relationship ratio in an explosion process, including:
obtaining paired test pieces with the same blast hole depth;
respectively loading the same amount of the explosive in the paired test pieces and respectively connecting with a detonating lead;
plugging the blast hole of one test piece in the pair of test pieces, wherein the blast hole of the other test piece is not plugged;
and detonating the paired test pieces, determining the success of detonation, respectively obtaining the volumes of the fracture damage areas of the paired test pieces after detonation, and calculating the dynamic-static action relation proportion based on the obtained volumes of the fracture damage areas.
With reference to the first aspect, in a first implementation manner of the first aspect, the test piece is made of organic glass polymethyl methacrylate, is cylindrical, and a blast hole is arranged in the center of the cylinder.
With reference to the first aspect, in a second implementation manner of the first aspect, the blocking the blast hole of one of the pair of test pieces includes:
and (3) inserting the plasticine dipped with the glue into the blast hole of one test piece in the pair of test pieces so as to completely plug the residual blast holes after the explosive is filled.
With reference to the first aspect, the first or second embodiment of the first aspect, in a third embodiment of the first aspect, the separately acquiring the volumes of the pair of test piece fracture damage areas after detonation includes:
scanning the pair of detonated test pieces in a CT real-time imaging system in sequence to obtain scanning slices;
calculating the area of a rupture damage area in each scanning slice;
and respectively counting the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for plugging the blast hole and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for not plugging the blast hole based on the calculated area of the fracture damage areas.
With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, the calculating an area of a rupture damage region in each scan slice includes:
and counting the picture area corresponding to the gray value range in the scanning slice by using a Matlab programming method according to the preset gray value range corresponding to the fracture damage area.
With reference to the third implementation manner of the first aspect, in a fifth implementation manner of the first aspect, the total volume of the fracture damage areas of each scan slice corresponding to the test piece for statistically plugging the blast hole includes:
acquiring the area of a fracture damage area of each scanning slice corresponding to a test piece for plugging a blast hole;
and calculating the product of the area of the fracture damage area of the scanning slice and the thickness of the scanning slice to obtain the volume of the fracture damage area of the scanning slice, and calculating the sum of the volumes of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole to obtain the total volume of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole.
With reference to the first aspect, the first or second implementation manner of the first aspect, in a sixth implementation manner of the first aspect, the calculating a dynamic-static action relationship ratio based on the acquired volume of the fracture damage region includes:
calculating the difference value between the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for blocking the blast hole and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece without blast hole blocking;
and calculating the quotient of the difference value and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece without blast hole plugging to obtain the dynamic-static action relation proportion.
In a second aspect, an embodiment of the present invention provides an apparatus for obtaining a ratio of a dynamic-static action relationship in an explosion process, including: a paired test piece acquisition module, a detonation setting module, a plugging processing module and a proportion calculation module, wherein,
the paired test piece acquisition module is used for acquiring paired test pieces with the same blast hole depth;
the detonation setting module is used for respectively loading the same explosive quantity into the paired test pieces and respectively connecting with a detonation lead;
the plugging processing module is used for plugging the blast hole of one test piece in the pair of test pieces, and the blast hole of the other test piece is not plugged;
and the proportion calculation module is used for detonating the paired test pieces, determining the success of detonation, respectively obtaining the volumes of the fracture damage areas of the pair of test pieces after detonation, and calculating the dynamic and static action relation proportion based on the obtained volumes of the fracture damage areas.
With reference to the second aspect, in a first embodiment of the second aspect, the test piece is made of organic glass polymethyl methacrylate and is cylindrical, and a blast hole is arranged in the center of the cylinder.
With reference to the second aspect, in a second implementation manner of the second aspect, the occlusion processing module includes: a first processing unit and a second processing unit, wherein,
the first processing unit is used for plugging plasticine of glue into the blast hole of one test piece in the pair of test pieces so as to completely plug the residual blast holes after the explosive is filled;
and the second processing unit is used for not plugging the blast hole of a test piece.
According to the method and the device for acquiring the dynamic-static action relation proportion in the explosion process, provided by the embodiment of the invention, paired test pieces with the same blast hole depth are acquired; respectively loading the same amount of the explosive in the paired test pieces and respectively connecting with a detonating lead; plugging the blast hole of one test piece in the pair of test pieces, wherein the blast hole of the other test piece is not plugged; and detonating the paired test pieces, determining the success of the detonation, respectively obtaining the volumes of the fracture damage areas of the paired test pieces after the detonation, and calculating the dynamic-static action relation proportion based on the obtained volumes of the fracture damage areas, so that the efficiency of utilizing the energy of the explosive can be improved, and the problems of low effective utilization of the energy of the explosive and low blasting efficiency caused by the fact that the dynamic-static action relation proportion cannot be obtained by the conventional detonation method are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for obtaining a dynamic-static interaction relationship ratio in an explosion process according to an embodiment of the present invention;
FIG. 2 is a schematic view of a test piece according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for obtaining a dynamic-static action relation ratio in an explosion process according to a second embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. 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.
Analysis shows that the difference between the propagation characteristic of the explosion stress wave and the propagation characteristic of the explosion gas is large: the explosion stress wave must propagate in the medium, the propagation speed in the solid is much faster than that in the gas, and the stress wave does not propagate in the vacuum, and after the explosive in the rock explodes, the stress wave can propagate to the surrounding rock mass in a spherical shape; while the detonation gas exists as a substance that moves to a location where the pressure and resistance are relatively low. Therefore, in the embodiment, the dynamic-static action relation proportion in the explosion process is obtained based on the difference between the explosion stress wave propagation characteristic and the explosion gas propagation characteristic, and as the explosion gas moves to a place with relatively low pressure intensity and resistance, in the drilling and explosion process, if the blast hole is not blocked to detonate the explosive, the explosion gas generated by explosion cannot form any resistance in the blast hole direction when diffusing along the blast hole direction, and all the explosion gas overflows along the blast hole direction, and only the explosion stress wave is left to generate destructive action on the rock mass; if the blast hole is blocked, the explosive stress wave and the explosive gas play a role in breaking rock together. Therefore, the dynamic and static action relation proportion in the explosion process can be researched in a manner of blocking blast holes and not blocking the blast holes.
Fig. 1 is a schematic flow chart of a method for obtaining a dynamic-static action relationship ratio in an explosion process according to an embodiment of the present invention, as shown in fig. 1, the method of this embodiment may include:
in this embodiment, as an optional embodiment, the number of the paired test pieces may be one pair or multiple pairs, each pair of paired test pieces is completely the same, and multiple pairs of test pieces may be the same or different. If a plurality of pairs of test pieces are completely the same, comprehensive statistical analysis can be carried out on the dynamic and static action relation proportion in the explosion process under the same condition; if a plurality of pairs of test pieces are different, the relation proportion of dynamic and static actions in the explosion process under different conditions can be researched.
In this embodiment, as an alternative, the test piece is made of Polymethyl methacrylate (PMMA), which is a brittle transparent material, so that the internal fracture damage region can be easily observed.
In this embodiment, as an optional embodiment, the test piece has a cylindrical shape, and the blast hole is arranged in the center of the cylindrical shape. Of course, in practical applications, the shape may be other shapes, such as a rectangular parallelepiped shape, a spherical shape, etc., which is not limited in this embodiment.
In this embodiment, the size of the test piece meets the requirements of an industrial electronic Computed Tomography (CT) imaging test system, and the test piece can be loaded on a testing machine. As an alternative example, the specimen size: phi 25mm x 50mm, i.e. the cylinder diameter is 25mm and the height is 50 mm.
Fig. 2 is a schematic structural diagram of a test piece according to an embodiment of the present invention. Referring to fig. 2, in the present embodiment, as an alternative embodiment, a blast hole with a depth of 25mm and a diameter of 3mm is drilled in the axial direction at the center of the upper end surface of the cylindrical test piece and extends into the shaft body.
102, respectively filling the paired test pieces with the same dosage and respectively connecting with a detonating lead;
in this example, a small amount of explosive was charged into each of the two blast holes. Because of the simulated blasting, the requirements for blast hole charging are as follows:
(1) the dosage is as small as possible, and the explosive can be detonated;
(2) the fracture damage zone does not extend beyond the cylinder.
In the embodiment, as an optional embodiment, lead azide elementary explosive is selected as the explosive, the explosive loading amount is 20mg, and the explosive loading length is 5 mm.
103, plugging the blast hole of one test piece in the pair of test pieces, wherein the blast hole of the other test piece is not plugged;
in this embodiment, as an optional embodiment, the blocking the blast hole of one test piece of the pair of test pieces includes:
and (3) inserting the plasticine dipped with the glue into the blast hole of one test piece in the pair of test pieces so as to completely plug the residual blast holes after the explosive is filled.
And 104, detonating the paired test pieces, determining the success of detonation, respectively obtaining the volumes of the fracture damage areas of the pair of test pieces after detonation, and calculating the dynamic-static action relation proportion based on the obtained volumes of the fracture damage areas.
In this embodiment, 2 test pieces are detonated in sequence. As an alternative embodiment, determining that detonation was successful comprises:
and if the rupture damage area after detonation does not exceed the cylinder, determining that the detonation is successful.
In this embodiment, as an optional embodiment, the respectively obtaining the volumes of the pair of test piece fracture damage areas after detonation includes:
a11, scanning the pair of detonated test pieces in a CT real-time imaging system in sequence to obtain scanning slices;
in this embodiment, as an optional embodiment, the scanning is volume scanning, and the thickness of each scan slice is a quotient of the height of the test piece and the number of scan slices corresponding to the test piece.
In this embodiment, the damaged test piece is scanned in the ACTIS300-320/225CT/DR high resolution industrial CT real-time imaging system, and the CT real-time imaging system is adopted to perform "volume scanning" on the test piece. As an alternative, for a standard specimen, 1000 CT slices (scan slices) are generated after a "volume scan" is used, and taking the height of the specimen as 50mm as an example, the thickness h of each scan slice is 50 mm/1000-50 gm.
A12, calculating the area of a rupture damage area in each scanning slice;
in this embodiment, as an alternative embodiment, the calculating the area of the rupture damage region in each scan slice includes:
and counting the picture area corresponding to the gray value range in the scanning slice by using a Matlab programming method according to the preset gray value range corresponding to the fracture damage area.
In this embodiment, as an optional embodiment, the gray value of the CT image is between 0 and 16, and according to the previous analysis and study, the region with the gray value greater than 0 is set as the fracture damage region, and the area of the region with the gray value greater than 0 in the scan slice is counted by using the Matlab programming method.
And A13, respectively counting the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for blocking the blast hole and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for not blocking the blast hole based on the calculated area of the fracture damage areas.
In this embodiment, if a plurality of pairs of test pieces with the same size and specification and the same charge amount are detonated simultaneously, the total area of the fracture damage area of the total scanning slice corresponding to the plurality of test pieces for plugging the blast hole is counted respectively, and the total area of the fracture damage area of the total scanning slice corresponding to the plurality of test pieces for not plugging the blast hole is counted.
In this embodiment, as an optional embodiment, counting the total volume of the fracture damage area of each scan slice corresponding to the test piece for plugging the blast hole includes:
acquiring the area of a fracture damage area of each scanning slice corresponding to a test piece for plugging a blast hole;
and calculating the product of the area of the fracture damage area of the scanning slice and the thickness of the scanning slice to obtain the volume of the fracture damage area of the scanning slice, and calculating the sum of the volumes of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole to obtain the total volume of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole.
In this embodiment, as an optional embodiment, the total volume of the fracture damage area of each scan slice corresponding to the test piece for plugging the blast hole is calculated by using the following formula:
in the formula (I), the compound is shown in the specification,
Vithe total volume of the fracture damage area of each scanning slice corresponding to the ith test piece is obtained;
Sijthe area of the fracture damage zone of the jth scan slice in the ith test piece;
hijthe thickness of the jth scanning slice in the ith test piece;
n is the number of scan slices into which the ith specimen is cut.
In this embodiment, as an optional embodiment, calculating the dynamic-static action relation ratio based on the obtained volume of the fracture damage area includes:
calculating the difference value between the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for blocking the blast hole and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece without blast hole blocking;
and calculating the quotient of the difference value and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece without blast hole plugging to obtain the dynamic-static action relation proportion.
In this embodiment, as an optional embodiment, the dynamic-static action relation ratio is calculated by using the following formula:
in the formula (I), the compound is shown in the specification,
xi is the ratio of the dynamic and static action relation;
Vfdthe total volume of the fracture damage area of each scanning slice corresponding to the test piece for plugging the blast hole;
Vbfdthe total volume of the fracture damage area of each scanning slice corresponding to the test piece without blast hole plugging.
In this embodiment, the fracture damage volume caused by the stress wave action is the total volume (V) of the fracture damage area of each scan slice corresponding to the test piece without blast hole pluggingbfd) The volume of the fracture damage caused by the rock breaking function of the explosive stress wave and the explosive gas is the total volume (V) of the fracture damage area of each scanning slice corresponding to the test piece for plugging the blast holefd) The volume of fracture damage by the action of the explosive gas is the difference (V) between the volume of fracture damage by the action of the explosive stress wave and the explosive gasfd-Vbfd)。
In the embodiment, in the drilling and blasting process, based on the fact that the blast hole is not blocked and the explosive is detonated, the blasting is considered to be only damaged due to the action of stress waves; the detonating explosive for blocking the blast hole can be considered as the blasting stress wave and the blasting gas which jointly play a rock breaking role to cause fracture damage. Therefore, under the condition that other parameters are the same, detonation is carried out in a manner of blocking blast holes and not blocking the blast holes, and corresponding fracture damage volumes are respectively obtained, so that the dynamic and static action relation proportion in the explosion process can be researched by utilizing the respectively obtained fracture damage volumes, the action of an explosion stress wave is relatively separated from the quasi-static action of the explosion gas, the action proportions of the explosion stress wave and the quasi-static action of the explosion gas can be respectively determined, and the respective action proportions of the explosion stress wave and the explosion stress wave in rock blasting can be respectively determined.
Fig. 3 is a schematic structural diagram of an apparatus for obtaining a dynamic-static action relationship ratio in an explosion process according to a second embodiment of the present invention, as shown in fig. 3, the apparatus of this embodiment may include: a pair of test piece acquisition module 31, a detonation setting module 32, a plugging processing module 33, and a proportion calculation module 34, wherein,
a paired test piece acquisition module 31 for acquiring paired test pieces having the same blast hole depth;
in this embodiment, as an optional embodiment, the test piece is made of organic glass polymethyl methacrylate, and is cylindrical, and the blast hole is arranged in the center of the cylinder. As an alternative example, the specimen size: phi 25mm x 50mm, i.e. the cylinder diameter is 25mm and the height is 50 mm.
In this embodiment, as an optional embodiment, at the center of the upper end surface of the cylindrical test piece, a blast hole with a depth of 25mm and a diameter of 3mm is drilled into the shaft body along the axial direction.
The detonation setting module 32 is used for respectively loading the same explosive quantity into the paired test pieces and respectively connecting with a detonation lead;
in the embodiment, as an optional embodiment, lead azide elementary explosive is selected as the explosive, the explosive loading amount is 20mg, and the explosive loading length is 5 mm.
The plugging processing module 33 is used for plugging the blast hole of one test piece in the pair of test pieces, and the blast hole of the other test piece is not plugged;
in this embodiment, as an optional embodiment, the plugging processing module 33 includes: a first processing unit and a second processing unit (not shown), wherein,
the first processing unit is used for plugging plasticine of glue into the blast hole of one test piece in the pair of test pieces so as to completely plug the residual blast holes after the explosive is filled;
and the second processing unit is used for not plugging the blast hole of a test piece.
And the proportion calculation module 34 is used for detonating the paired test pieces, determining the success of the detonation, respectively obtaining the volumes of the fracture damage areas of the pair of test pieces after the detonation, and calculating the dynamic-static action relation proportion based on the obtained volumes of the fracture damage areas.
In this embodiment, if the burst damage area after detonation does not exceed the cylinder, it is determined that the detonation is successful.
In this embodiment, as an optional embodiment, the proportion calculating module 34 includes: a determination unit, a lesion field volume acquisition unit, and a proportion calculation unit (not shown in the figure), wherein,
the determining unit is used for detonating the paired test pieces, determining the success of the detonation and informing the damaged area volume obtaining unit;
the damaged area volume acquisition unit is used for scanning the pair of detonated test pieces in a CT real-time imaging system in sequence to obtain scanning slices; calculating the area of a rupture damage area in each scanning slice; respectively counting the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for plugging the blast hole and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for not plugging the blast hole based on the calculated area of the fracture damage areas;
in this embodiment, as an alternative embodiment, the calculating the area of the rupture damage region in each scan slice includes:
and counting the picture area corresponding to the gray value range in the scanning slice by using a Matlab programming method according to the preset gray value range corresponding to the fracture damage area.
In this embodiment, as another optional embodiment, the counting the total volume of the fracture damage area of each scan slice corresponding to the test piece for plugging the blast hole includes:
acquiring the area of a fracture damage area of each scanning slice corresponding to a test piece for plugging a blast hole;
and calculating the product of the area of the fracture damage area of the scanning slice and the thickness of the scanning slice to obtain the volume of the fracture damage area of the scanning slice, and calculating the sum of the volumes of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole to obtain the total volume of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole.
In this embodiment, as an optional embodiment, the total volume of the fracture damage area of each scan slice corresponding to the test piece for plugging the blast hole is calculated by using the following formula:
in the formula (I), the compound is shown in the specification,
Vithe total volume of the fracture damage area of each scanning slice corresponding to the ith test piece is obtained;
Sijthe area of the fracture damage zone of the jth scan slice in the ith test piece;
hijthe thickness of the jth scanning slice in the ith test piece;
n is the number of scan slices into which the ith specimen is cut.
And the proportion calculation unit is used for calculating the dynamic and static action relation proportion based on the acquired volume of the rupture damage area.
In this embodiment, as an optional embodiment, the proportion calculating unit includes: a difference operator unit and a scale calculation subunit, wherein,
a difference value calculating subunit, configured to calculate a difference value between the total volume of the fractured and damaged areas of the scanning slices corresponding to the test piece for plugging the blast hole and the total volume of the fractured and damaged areas of the scanning slices corresponding to the test piece for which blast hole plugging is not performed;
and the proportion calculating subunit is used for calculating a quotient of the difference value and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece without blast hole plugging, so as to obtain the dynamic-static action relation proportion.
In this embodiment, as an optional embodiment, the dynamic-static action relation ratio is calculated by using the following formula:
in the formula, xi is the dynamic and static action relation proportion;
Vfdthe total volume of the fracture damage area of each scanning slice corresponding to the test piece for plugging the blast hole;
Vbfdis notAnd (4) the total volume of the fracture damage area of each scanning slice corresponding to the test piece for blast hole plugging.
The apparatus of this embodiment may be used to implement the technical solutions of the method embodiments shown in fig. 1 and fig. 2, and the implementation principles and technical effects are similar, which are not described herein again.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof.
In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
For convenience of description, the above devices are described separately in terms of functional division into various units/modules. Of course, the functionality of the units/modules may be implemented in one or more software and/or hardware implementations of the invention.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A method for obtaining dynamic and static action relation proportion in an explosion process is characterized by comprising the following steps:
obtaining paired test pieces with the same blast hole depth; the test piece is cylindrical, a blast hole is arranged in the center of the cylindrical, the center of the upper end face of the cylindrical test piece extends to the inside of the shaft body along the axial direction to drill a blast hole with the depth of 25mm and the diameter of 3mm, and the size of the test piece is as follows: phi 25mm multiplied by 50 mm;
respectively loading the same amount of the explosive in the paired test pieces and respectively connecting with a detonating lead; the dosage is 20mg, and the charging length is 5 mm;
plugging the blast hole of one test piece in the pair of test pieces, wherein the blast hole of the other test piece is not plugged;
detonating the paired test pieces, determining the success of the detonation, respectively obtaining the volumes of the fracture damage areas of the pair of test pieces after the detonation, and calculating the dynamic-static action relation proportion based on the obtained volumes of the fracture damage areas; the criterion for determining the success of detonation is as follows: the rupture damage area after detonation does not exceed the cylinder;
wherein, the dynamic and static action relation proportion is calculated by the following formula:
in the formula, xi is the dynamic and static action relation proportion;
Vfdthe total volume of the fracture damage area of each scanning slice corresponding to the test piece for plugging the blast hole;
Vbfdthe total volume of the fracture damage areas of the scanning slices corresponding to the test piece without blast hole plugging;
wherein the respectively obtaining the volumes of the pair of test piece fracture damage areas after detonation comprises:
scanning the pair of detonated test pieces in an ACTIS300-320/225CT/DR industrial CT real-time imaging system in sequence to obtain 1000 scanning slices;
calculating the thickness of each scanning slice according to a formula h, namely the height of the test piece/the number of slices;
calculating the area of a rupture damage area in each scanning slice;
based on the calculated area of the fracture damage region according to the formula
Respectively calculating the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for blocking the blast hole, and calculating the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for not blocking the blast hole; wherein, ViThe total volume of the fracture damage area of each scanning slice corresponding to the ith test piece is obtained;
Sijthe area of the fracture damage zone of the jth scan slice in the ith test piece;
hijthe thickness of the jth scanning slice in the ith test piece;
n is the number of the scanning slices into which the ith test piece is cut;
the calculating the area of the rupture damage area in each scanning slice comprises the following steps: acquiring a region with the gray value larger than 0 in a scanning slice, and determining the region with the gray value larger than 0 as a fracture damage region; counting the picture area corresponding to the area with the gray value larger than 0 in the scanning slice by using a Matlab programming method;
said area based on said calculated rupture damage zone is according to the formula
Respectively calculating the total volume of the fracture damage area of each scanning slice corresponding to the test piece for blocking the blast hole, and calculating the total volume of the fracture damage area of each scanning slice corresponding to the test piece for not blocking the blast hole, wherein the total volume of the fracture damage area of each scanning slice comprises the following steps:
judging whether a plurality of pairs of paired test pieces with the same size and specification and the same charge are detonated simultaneously;
if a plurality of pairs of paired test pieces with the same size and specification and the same charge amount are detonated simultaneously, calculating and counting the total area of the fracture damage areas of the total scanning slices corresponding to the test pieces for plugging the blast hole and the total area of the fracture damage areas of the total scanning slices corresponding to the test pieces for not plugging the blast hole according to the formula;
the device used by the method for acquiring the dynamic-static action relation proportion in the explosion process comprises a paired test piece acquisition module, a detonation setting module, a plugging processing module and a proportion calculation module, wherein the paired test piece acquisition module is used for acquiring paired test pieces with the same blast hole depth; the detonation setting module is used for respectively loading the same explosive quantity into the paired test pieces and respectively connecting with a detonation lead; the plugging processing module is used for plugging the blast hole of one test piece in the pair of test pieces, and the blast hole of the other test piece is not plugged; the proportion calculation module is used for detonating the paired test pieces, determining the success of detonation, respectively obtaining the volumes of the fracture damage areas of the pair of test pieces after detonation, and calculating the dynamic and static action relation proportion based on the obtained volumes of the fracture damage areas;
obtaining paired test pieces with the same blast hole depth; respectively loading the same amount of the explosive in the paired test pieces and respectively connecting with a detonating lead; plugging the blast hole of one test piece in the pair of test pieces, wherein the blast hole of the other test piece is not plugged; and detonating the paired test pieces, determining the success of detonation, respectively obtaining the volumes of the fracture damage areas of the paired test pieces after detonation, and calculating the dynamic-static action relation proportion based on the obtained volumes of the fracture damage areas.
2. The method for obtaining the dynamic-static action relation ratio in the explosion process according to claim 1, wherein the blocking of the blast hole of one test piece in the pair of test pieces comprises:
and (3) inserting the plasticine dipped with the glue into the blast hole of one test piece in the pair of test pieces so as to completely plug the residual blast holes after the explosive is filled.
3. The method for obtaining the dynamic-static action relation proportion in the explosion process according to claim 1, wherein the step of counting the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for plugging the blast hole comprises the following steps:
acquiring the area of a fracture damage area of each scanning slice corresponding to a test piece for plugging a blast hole;
and calculating the product of the area of the fracture damage area of the scanning slice and the thickness of the scanning slice to obtain the volume of the fracture damage area of the scanning slice, and calculating the sum of the volumes of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole to obtain the total volume of the fracture damage areas of all the scanning slices corresponding to the test piece for blocking the blast hole.
4. A device for obtaining dynamic and static action relation proportion in an explosion process is characterized by comprising the following components: a paired test piece acquisition module, a detonation setting module, a plugging processing module and a proportion calculation module, wherein,
the paired test piece acquisition module is used for acquiring paired test pieces with the same blast hole depth; the test piece is cylindrical, a blast hole is arranged in the center of the cylindrical, the center of the upper end face of the cylindrical test piece extends to the inside of the shaft body along the axial direction to drill a blast hole with the depth of 25mm and the diameter of 3mm, and the size of the test piece is as follows: phi 25mm multiplied by 50 mm;
the detonation setting module is used for respectively loading the same explosive quantity into the paired test pieces and respectively connecting with a detonation lead; the dosage is 20mg, and the charging length is 5 mm;
the plugging processing module is used for plugging the blast hole of one test piece in the pair of test pieces, and the blast hole of the other test piece is not plugged;
the proportion calculation module is used for detonating the paired test pieces, determining the success of detonation, respectively obtaining the volumes of the fracture damage areas of the pair of test pieces after detonation, and calculating the dynamic and static action relation proportion based on the obtained volumes of the fracture damage areas;
the criterion for determining the success of detonation is as follows: the rupture damage area after detonation does not exceed the cylinder;
wherein, the dynamic and static action relation proportion is calculated by the following formula:
in the formula, xi is the dynamic and static action relation proportion;
Vfdthe total volume of the fracture damage area of each scanning slice corresponding to the test piece for plugging the blast hole;
Vbfdthe total volume of the fracture damage areas of the scanning slices corresponding to the test piece without blast hole plugging;
wherein the respectively obtaining the volumes of the pair of test piece fracture damage areas after detonation comprises:
scanning the pair of detonated test pieces in a CT real-time imaging system in sequence to obtain scanning slices;
calculating the area of a rupture damage area in each scanning slice;
and respectively counting the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for plugging the blast hole and the total volume of the fracture damage areas of the scanning slices corresponding to the test piece for not plugging the blast hole based on the calculated area of the fracture damage areas.
5. The apparatus for obtaining the ratio of dynamic-static action relationship in the explosion process according to claim 4, wherein the plugging processing module comprises: a first processing unit and a second processing unit, wherein,
the first processing unit is used for plugging the plasticine dipped with the glue into the blast hole of one test piece in the pair of test pieces so as to completely plug the residual blast holes after the explosive is filled;
and the second processing unit is used for not plugging the blast hole of the other test piece.
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