CN113074858B - Sensing system for measuring dynamic blasting state, sample system and test method - Google Patents
Sensing system for measuring dynamic blasting state, sample system and test method Download PDFInfo
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- CN113074858B CN113074858B CN202110358044.1A CN202110358044A CN113074858B CN 113074858 B CN113074858 B CN 113074858B CN 202110358044 A CN202110358044 A CN 202110358044A CN 113074858 B CN113074858 B CN 113074858B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/14—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force of explosions; for measuring the energy of projectiles
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Abstract
The invention provides a sensing system, a sample system and a test method for measuring the state of dynamic blasting, which are used for solving the problems that the sensing system is complex and the expansion deformation generated by blasting cannot be comprehensively measured and monitored in the prior art. A sensing system for measuring a state of a dynamic blast, comprising: the flexible non-elastic rope surrounds a circumference; the spring type force measuring devices are arranged at two ends of the flexible non-elastic rope and can measure displacement of the two ends of the flexible non-elastic rope and record stress conditions of the two ends of the flexible non-elastic rope. The deformation quantity and the stress condition can be measured simultaneously.
Description
Technical Field
The invention relates to the field of blasting state analysis, in particular to a sensing system, a sample system and a test method for measuring a dynamic blasting state.
Background
The existing explosion mechanics analysis for the blast hole usually adopts the stress induction sheet to collect force, but the installation position is limited, and the number of the stress induction sheets is limited, and the position of each stress induction sheet is discontinuous, so that the precision is not high when the stress induction sheet is used for analyzing the explosion, the mechanical state during explosion can not be comprehensively reflected, in order to more comprehensively and accurately measure the force generated during explosion, the stress induction sheets as many as possible need to be installed, and the cost and the installation complexity before collection are improved.
Meanwhile, the prior art cannot realize comprehensive measurement and monitoring of expansion deformation generated by blasting.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a sensing system, a sample system and a testing method for measuring a dynamic blasting state, which are used to solve the problems that the sensing system is complicated and cannot realize the comprehensive measurement and monitoring of the expansion deformation generated by the blasting in the prior art.
To achieve the above and other related objects, the present invention provides a sensing system for measuring a state of a dynamic burst, comprising:
the flexible non-elastic rope surrounds a circumference;
the spring type force measuring devices are arranged at two ends of the flexible non-elastic rope and can measure displacement of the two ends of the flexible non-elastic rope and record stress conditions of the two ends of the flexible non-elastic rope.
Optionally, the flexible non-elastic rope and the two spring type force measuring devices form a group of measuring groups;
the measurement sets are more than one set in the axial direction.
Optionally, the device further comprises a controller, the controller is configured to receive data of displacement amounts of the two ends of the flexible non-elastic cord and data of forces applied to the two ends of the flexible non-elastic cord and perform the following processing,
the change of the circumference before and after explosion was: l is1+L2Wherein L is1And L2The displacement variation quantity of the two ends of the flexible non-elastic rope is obtained;
the two ends are stressed respectively during explosion: n is a radical of1And N2，（N1+N2) 2 is the average force generated by explosion;
the radius of the circumference enclosed by the flexible non-elastic rope before explosion is R1；
The radius of the circumference enclosed by the exploded flexible non-elastic rope is R2Wherein R is2- R1= amount of radial deformation due to explosion;
and 2 π R2-2πR1=L1+L2Then R is2- R1= （L1+L2）/2π。
A sample system comprises the sensing system for measuring the dynamic blasting state and a pouring template;
the pouring sample plate is formed through a pouring process, at least one blast hole is formed in the pouring sample plate, and the flexible non-elastic rope is pre-embedded in the pouring sample plate.
Optionally, the pouring template is formed by pouring concrete, or the pouring template is formed by mixing and pouring epoxy resin and sand and stone.
Optionally, a plurality of sensing systems are correspondingly arranged in the axial direction of one blast hole to comprehensively monitor the stress condition and the deformation condition of different axial positions of the one blast hole.
Optionally, a pre-buried pipe is further arranged around the blast hole, the pre-buried pipe is used for being sleeved at the non-circumferential position of the flexible non-elastic rope, the pre-buried pipe is communicated with the edge position of the pouring sample plate, and the two ends of the flexible non-elastic rope are all sleeved with the pre-buried pipe.
Optionally, still include the installing frame, the installing frame is used for the installation the spring ergograph, just the installing frame with the pouring model interval sets up, the installing frame through the spliced pole with the point-to-point connection of pouring model.
Optionally, the blast holes are multiple, and the directions of the embedded pipes of the sensing systems corresponding to the blast holes are staggered.
An assay method comprising the steps of:
embedding a flexible non-elastic rope in a pouring sample plate, wherein the flexible non-elastic rope surrounds a circumference, and the pouring sample plate is preformed to form blast holes or a plurality of blast holes are drilled after the pouring sample plate is formed;
spring type force measuring devices are arranged at two ends of the flexible non-elastic rope, and the spring type force measuring devices can measure displacement of the two ends of the flexible non-elastic rope and record stress conditions of the two ends of the flexible non-elastic rope;
filling explosive into the blast hole and detonating;
according to the data detected by the spring type force measuring device, the following operations are carried out:
the change of the circumference before and after explosion was: l is1+L2Wherein L is1And L2The displacement variation quantity of the two ends of the flexible non-elastic rope is obtained;
the two ends are stressed respectively during explosion: n is a radical of1And N2，（N1+N2) 2 is the average force generated by explosion;
the radius of the circumference enclosed by the flexible non-elastic rope before explosion is R1；
The radius of the circumference enclosed by the exploded flexible non-elastic rope is R2Wherein R is2- R1= amount of radial deformation due to explosion;
and 2 π R2-2πR1=L1+L2Then R is2- R1= （L1+L2）/2π。
As described above, the sensing system, the sample system and the testing method for measuring the dynamic blasting state according to the present invention have at least the following advantages:
through the arrangement of the flexible non-elastic ropes, on one hand, the flexible structure can be encircled into a circle, on the other hand, the non-elastic structure can avoid the influence of the elasticity of the non-elastic structure on the measurement of deformation quantity, in addition, the flexible non-elastic rope is matched with the spring type force measuring device, the circumferential part of the flexible non-elastic rope is pre-embedded in the pouring sample plate, in the explosion stress and deformation process, the embedded part of the flexible non-elastic rope can send radial expansion deformation along with the pouring sample plate, then the spring type force measuring device is pulled to measure the stress, and simultaneously the displacement variation of the flexible non-elastic rope can be measured due to the corresponding relation between the elasticity and the deformation of the spring, the circumferential length variation is calculated from the displacement variation, and the radial deformation is further calculated.
Drawings
Fig. 1 is a schematic diagram of a sensing system for measuring the state of a dynamic shot according to the present invention.
Figure 2 shows a schematic of a sample system of the present invention (a sensor installation schematic for only one blast hole location).
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1-2. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so that the present disclosure is not limited to the technical essence, and any modifications of the structures, changes of the ratios, or adjustments of the sizes, can still fall within the scope of the present disclosure without affecting the function and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
Referring to fig. 1 to 2, the present invention provides a sensing system for measuring a dynamic blasting state, including: the flexible non-elastic force measuring device comprises a flexible non-elastic rope 11 and a spring type force measuring device 12, wherein the flexible non-elastic rope 11 is surrounded to form a circumference; the spring type force measuring devices 12 are arranged at two ends of the flexible non-elastic rope 11, and the spring type force measuring devices 12 can measure displacement of the two ends of the flexible non-elastic rope 11 and record stress conditions of the two ends of the flexible non-elastic rope 11. Can enough realize big or small blast hole circumference atress, the deformation size that can also measure the explosion simultaneously produced, and the mode of this sensor relative traditional foil gage and foil gage, this technical scheme's simple structure, simple to operate. Optionally, the flexible non-elastic cord 11 and the two spring-type force measuring devices 12 form a group of measuring groups; the measurement sets are more than one set in the axial direction. Through the setting of multiunit measurement group for it can realize measuring a plurality of places of the axial of big gun hole, thereby realizes being close the measurement of whole drum inner wall, and arranges that the quantity of sensor is not many, and simple structure, and it is also more convenient to arrange the sensor, and it has higher practical value.
In this embodiment, please refer to fig. 1 to 2, further comprising a controller, wherein the controller is configured to receive data of displacement amounts of two ends of the flexible non-elastic cord 11 and data of forces applied to two ends of the flexible non-elastic cord 11, and perform the following processing,
the change of the circumference before and after explosion was: l is1+L2Wherein L is1And L2The displacement variation quantity of the two ends of the flexible non-elastic rope 11 is obtained;
the two ends are stressed respectively during explosion: n is a radical of1And N2，（N1+N2) 2 is the average force generated by explosion;
the circumference radius surrounded by the flexible non-elastic rope 11 before explosion is R1；
The circumference radius surrounded by the exploded flexible non-elastic rope 11 is R2Wherein R is2- R1= amount of radial deformation due to explosion;
and 2 π R2-2πR1=L1+L2Then R is2- R1= （L1+L2）/2π。
The deformation quantity generated by explosion is calculated ingeniously through the displacement variation quantity of the two ends of the flexible non-elastic rope 11, so that the complexity of a sensor system is reduced, the measurement precision and the measurement range are improved, and the explosion state around the blast hole can be comprehensively and effectively monitored and analyzed.
Referring to fig. 1 to 2, a sample system includes the sensing system for measuring the dynamic blasting state, and further includes a pouring template 13; the pouring sample plate 13 is formed through a pouring process, at least one blast hole 131 is formed in the pouring sample plate 13, and the flexible non-elastic rope 11 is pre-embedded in the pouring sample plate 13. Optionally, the casting template 13 is formed by casting concrete, or the casting template 13 is formed by mixing and casting epoxy resin and sand. The concrete pouring formula is not the focus of the application, and the environment of each rock soil or concrete can be effectively simulated through the arrangement of the pouring sample plate 13, so that the simulation detection test is realized. Optionally, a plurality of sensing systems are correspondingly arranged in the axial direction of one blast hole 131 to comprehensively monitor stress conditions and deformation conditions of different axial positions of one blast hole 131.
In this embodiment, referring to fig. 2, a pre-buried pipe 132 is further disposed around the blast hole 131, the pre-buried pipe 132 is configured to be sleeved at a non-circumferential position of the flexible non-elastic cord 11, the pre-buried pipe 132 leads to an edge position of the pouring template 13, and two ends of the flexible non-elastic cord 11 are both sleeved with the pre-buried pipe 132. By providing the pre-buried pipe 132, the problems of inaccurate deformation measurement and force measurement due to mechanical contact of the non-circumferential portion with the casting template 13 can be avoided. Optionally, there are a plurality of the blast holes 131, and the directions of the embedded pipes 132 of the sensing systems corresponding to the blast holes 131 are staggered. The staggered arrangement can avoid interference between each pair of flexible non-elastic ropes 11 and between the embedded pipes 132.
In this embodiment, please refer to fig. 2, the spring force measuring device further includes a mounting frame 134, the mounting frame 134 is used for mounting the spring force measuring device 12, the mounting frame 134 and the pouring template 13 are arranged at an interval, and the mounting frame 134 is connected with the pouring template 13 point to point through a connecting column. Effective installation to spring ergograph 12 can be realized to the frame setting of installation, and through point-to-point connection structure's setting, has avoided the outside mechanics restriction of installing frame 134 to pouring model 13 as far as possible to have more real explosion detection effect.
An assay method comprising the steps of:
embedding flexible non-elastic ropes 11 in a pouring sample plate 13 in advance, wherein the flexible non-elastic ropes 11 enclose a circle, and blast holes 131 are prefabricated in the pouring sample plate 13 or a plurality of blast holes 131 are drilled after the pouring sample plate 13 is formed;
the spring type force measuring devices 12 are arranged at two ends of the flexible non-elastic rope 11, and the spring type force measuring devices 12 can measure the displacement of the two ends of the flexible non-elastic rope 11 and record the stress conditions of the two ends of the flexible non-elastic rope 11;
filling explosive into the blast hole 131 and detonating;
according to the data detected by the spring type force measuring device 12, the following operations are carried out:
the change of the circumference before and after explosion was: l is1+L2Wherein L is1And L2The displacement variation quantity of the two ends of the flexible non-elastic rope 11 is obtained;
the two ends are stressed respectively during explosion: n is a radical of1And N2，（N1+N2) 2 is the average force generated by explosion;
the circumference radius surrounded by the flexible non-elastic rope 11 before explosion is R1；
The circumference radius surrounded by the exploded flexible non-elastic rope 11 is R2Wherein R is2- R1= amount of radial deformation due to explosion;
and 2 π R2-2πR1=L1+L2Then R is2- R1= （L1+L2）/2π。
In summary, according to the invention, by arranging the flexible non-elastic cord 11, on one hand, the flexible structure can be enclosed into a circle, on the other hand, the non-elastic structure can prevent the deformation quantity from being influenced by the elasticity of the flexible non-elastic cord 11, in addition, the flexible non-elastic cord 11 is matched with the spring type force measuring device 12, the circumferential part of the flexible non-elastic cord 11 is pre-embedded in the pouring template 13, during the explosion stress and deformation processes, the pre-embedded part of the flexible non-elastic cord 11 can send radial expansion deformation along with the pouring template 13, then the spring type force measuring device 12 is pulled, the stress magnitude is measured by the spring type force measuring device 12, meanwhile, because the elasticity and the deformation of the spring have corresponding relation, the displacement variation quantity of the flexible non-elastic cord 11 can be measured, according to the displacement variation quantity, the circumference variation quantity is calculated, the radial deformation quantity is further calculated, the structure is simple, and the measurement precision is high, and simultaneously the force and deformation quantity during explosion can be measured. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A sensing system for measuring a state of a dynamic blast, comprising:
the flexible non-elastic rope surrounds a circumference;
the spring type force measuring devices are arranged at two ends of the flexible non-elastic rope and can measure displacement of the two ends of the flexible non-elastic rope and record stress conditions of the two ends of the flexible non-elastic rope;
the flexible non-elastic rope and the two spring type force measuring devices form a group of measuring groups;
more than one set of said measurement sets in the axial direction;
the device also comprises a controller, wherein the controller is used for receiving the displacement data of the two ends of the flexible non-elastic rope and the stress data of the two ends of the flexible non-elastic rope and processing the displacement data and the stress data,
the change of the circumference before and after explosion was: l1+ L2, wherein L1 and L2 are displacement variation of two ends of the flexible non-elastic rope;
the two ends are stressed respectively during explosion: n1 and N2, (N1 + N2)/2 is the average force generated by explosion;
the radius of the circumference enclosed by the flexible non-elastic rope before explosion is R1；
The radius of the circumference enclosed by the exploded flexible non-elastic rope is R2Wherein R is2- R1= amount of radial deformation due to explosion;
and 2 π R2-2πR1= L1+ L2, then R2- R1= （L1+L2）/2π。
2. A sample system comprising a sensing system for measuring the status of a dynamic blast as described in claim 1, further comprising a casting template;
the pouring sample plate is formed through a pouring process, at least one blast hole is formed in the pouring sample plate, and the flexible non-elastic rope is pre-embedded in the pouring sample plate.
3. The sample system as claimed in claim 2, wherein: the pouring sample plate is formed by pouring concrete, or the pouring sample plate is formed by mixing and pouring epoxy resin and sand and stone.
4. The sample system as claimed in claim 2, wherein: and a plurality of sensing systems are correspondingly arranged in the axial direction of one blast hole so as to comprehensively monitor the stress condition and the deformation condition of different axial positions of one blast hole.
5. The sample system as claimed in claim 2, wherein: still be equipped with the embedded pipe around the big gun hole, the embedded pipe is used for the cover to establish the non-circumference position of flexible non-stretch cord, just the embedded pipe leads to the border position of pouring model, just the both ends of flexible non-stretch cord all overlap and establish the embedded pipe.
6. The sample system as claimed in claim 5, wherein: still include the installing frame, the installing frame is used for the installation the spring ergograph, just the installing frame with the pouring model interval sets up, the installing frame through the spliced pole with the point-to-point connection of pouring model.
7. The sample system as claimed in claim 5, wherein: the blast holes are multiple, and the directions of the embedded pipes of the sensing systems corresponding to the blast holes are staggered.
8. A testing method using the sample system of claim 2, comprising the steps of:
embedding a flexible non-elastic rope in a pouring sample plate, wherein the flexible non-elastic rope surrounds a circumference, and the pouring sample plate is preformed to form blast holes or a plurality of blast holes are drilled after the pouring sample plate is formed;
spring type force measuring devices are arranged at two ends of the flexible non-elastic rope, and the spring type force measuring devices can measure displacement of the two ends of the flexible non-elastic rope and record stress conditions of the two ends of the flexible non-elastic rope;
filling explosive into the blast hole and detonating;
according to the data detected by the spring type force measuring device, the following operations are carried out:
the change of the circumference before and after explosion was: l1+ L2, wherein L1 and L2 are displacement variation of two ends of the flexible non-elastic rope;
the two ends are stressed respectively during explosion: n1 and N2, (N1 + N2)/2 is the average force generated by explosion;
the radius of the circumference enclosed by the flexible non-elastic rope before explosion is R1；
The radius of the circumference enclosed by the exploded flexible non-elastic rope is R2Wherein R is2- R1= amount of radial deformation due to explosion;
and 2 π R2-2πR1= L1+ L2, then R2- R1= （L1+L2）/2π。
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| CN109975119A (en) * | 2019-04-15 | 2019-07-05 | 四川大学 | A kind of rock Biaxial Compression blasting design method |
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| CN101418581B (en) * | 2008-11-21 | 2010-09-01 | 湖南大学 | Discrete material pile swelling capacity tester |
| CN201429624Y (en) * | 2009-04-20 | 2010-03-24 | 昆明理工大学 | Device for testing underwater explosion velocity of explosive |
| CN202939902U (en) * | 2012-12-14 | 2013-05-15 | 山东科技大学 | Teaching experiment apparatus capable of simulating common vertical shaft driving blasting |
| CN108061495B (en) * | 2017-10-24 | 2018-08-28 | 中国矿业大学 | A kind of breast wall apparatus and bore hole pressure test method |
| CN209903505U (en) * | 2018-12-20 | 2020-01-07 | 昆明理工大学 | Concrete experiment model pouring mold |
| CN110375638A (en) * | 2019-08-28 | 2019-10-25 | 中国工程物理研究院化工材料研究所 | A kind of radial deformation measuring device based on LVDT sensor |
| CN112561147A (en) * | 2020-12-10 | 2021-03-26 | 浙江省特种设备科学研究院 | Thin-wall steel pipe explosion pressure prediction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606267A (en) * | 2015-12-31 | 2016-05-25 | 中国船舶重工集团公司第七○二研究所 | Measuring device and method of explosive underwater explosion power |
| CN109975119A (en) * | 2019-04-15 | 2019-07-05 | 四川大学 | A kind of rock Biaxial Compression blasting design method |
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