CN115420626A - Device and method for measuring coal rock impact intensity - Google Patents
Device and method for measuring coal rock impact intensity Download PDFInfo
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- CN115420626A CN115420626A CN202210975300.6A CN202210975300A CN115420626A CN 115420626 A CN115420626 A CN 115420626A CN 202210975300 A CN202210975300 A CN 202210975300A CN 115420626 A CN115420626 A CN 115420626A
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- 239000003245 coal Substances 0.000 title claims abstract description 287
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
Abstract
The invention provides a device and a method for measuring coal rock impact intensity, wherein the device comprises: the device comprises a bearing and punching box, a rock press, a film pressure sensor and a data processing terminal; the impact bearing box is used for placing a coal rock sample to be detected; the rock press is used for pressurizing the coal rock sample to be detected; the thin film pressure sensor is positioned on the inner wall of the impact bearing box, and is used for acquiring the ejection pressure value of the crushed block of the coal rock sample to be detected; and the data processing terminal is used for determining the impact intensity of the coal rock sample to be detected based on the ejection pressure value obtained by the film pressure sensor. According to the device and the method for measuring the coal rock impact intensity, the coal rock sample to be detected is pressurized through the rock press, the ejection pressure value of the broken block of the coal rock sample to be detected is obtained under the condition that the coal rock sample to be detected is subjected to impact damage, the impact intensity is calculated, accurate quantitative analysis of the coal rock impact intensity to be detected is achieved, and accuracy of evaluation of the coal rock sample to be detected is improved.
Description
Technical Field
The invention relates to the technical field of coal rock parameter measurement, in particular to a device and a method for measuring coal rock impact intensity.
Background
Coal rock impact damage is a typical dynamic damage phenomenon, often occurs in deep-buried tunnels or roadways, and is great in harm. The existing method usually evaluates the impact intensity or impact tendency of the coal and rock by carrying out a rock mechanics test, namely, the coal and rock test is adopted to load the coal and rock test sample, the ejection intensity of broken rock blocks of the coal and rock test sample in the damage process is observed, or the impact intensity or impact tendency of the coal and rock test sample is indirectly evaluated by defining some stress or deformation indexes.
The existing rock mechanics test can only qualitatively evaluate the coal rock impact intensity by visual inspection or recording the ejection intensity of the broken rock blocks by using a camera. For coal rocks with obvious impact tendency difference, under the same loading condition, by observing the ejection intensity of the broken rock blocks, the size relation of the impact intensities of different coal rock samples can be qualitatively obtained; however, for coal rocks with little difference in impact tendencies, the size relationship of the impact intensity of different coal rock samples cannot be obtained through observation. According to the method for indirectly estimating the impact intensity or impact tendency of the coal rock sample by defining the stress or deformation index, the condition that the evaluation result is inconsistent with the actual result often occurs due to the indirection of the evaluation index. Due to the lack of a measuring device for quantitatively evaluating the coal rock impact intensity, the evaluation and the comparison of the coal rock impact intensity cannot be accurately carried out in a rock mechanical test.
Disclosure of Invention
The invention provides a device and a method for measuring coal rock impact intensity, which are used for solving the technical problem that the coal rock impact intensity can not be accurately and quantitatively evaluated only by observing the ejection intensity of broken rock blocks for qualitative evaluation or indirectly evaluating through defining stress or deformation indexes aiming at the evaluation of the coal rock impact intensity in the prior art.
The invention provides a device for measuring coal rock impact intensity, which comprises:
the device comprises a punching bearing box, a rock press, a film pressure sensor and a data processing terminal;
the impact bearing box is a cylindrical box body with an opening at the upper part and is used for placing a coal rock sample to be detected;
the rock press is used for pressurizing the coal rock sample to be detected;
the thin film pressure sensor is positioned on the inner wall of the impact bearing box and used for acquiring the ejection pressure value of the crushed block of the coal rock sample to be detected under the loading action of the rock press machine on the coal rock sample to be detected;
the data processing terminal is connected with the film pressure sensor based on a signal transmission line and used for determining the impact intensity of the coal rock sample to be detected based on the ejection pressure value of the broken block of the coal rock sample to be detected, which is acquired by the film pressure sensor.
According to the device for measuring the coal rock impact intensity, the coal rock sample to be detected is under the loading action of the rock press machine, and the ejection pressure value of the broken block of the coal rock sample to be detected is obtained, and the device comprises the following components:
and under the loading action of the rock press, acquiring an ejection pressure value of the broken block of the coal rock sample to be detected, which is ejected to the film pressure sensor, after the coal rock sample to be detected is damaged.
According to the measuring device of coal petrography impact intensity that the invention provides, still include: a laser diode;
the laser diode is positioned at the head-tail closed position of the film pressure sensor and used for determining the initial position mark of the coal rock sample to be detected.
According to the measuring device of the coal rock impact intensity provided by the invention, the rock press comprises: the device comprises a workbench, a loading oil cylinder and a loading plate;
the workbench is used for placing the punch bearing box;
the lower part of the loading oil cylinder is connected with the loading plate, and the loading oil cylinder is used for driving the loading plate to move downwards and generating pressure on the coal rock sample to be detected;
the center of the loading plate is coincided with the center of the punching bearing box on the workbench.
According to the device for measuring the coal rock impact intensity, after the ejection pressure value of the crushed block of the coal rock sample to be detected is obtained, the device further comprises:
and determining a cylindrical pressure cloud picture of the coal rock sample to be detected according to the ejection pressure value and the position corresponding to the ejection pressure value determined by the film pressure sensor.
According to the device for measuring the coal rock impact intensity, after the cylindrical pressure cloud picture of the coal rock sample to be detected is determined, the device further comprises:
and obtaining a three-dimensional impact intensity cloud picture of the coal rock sample to be detected through inversion based on the cylindrical pressure cloud picture of the coal rock sample to be detected and the size of the coal rock sample to be detected.
According to the coal rock impact intensity measuring device provided by the invention, the determination of the impact intensity of the coal rock sample to be detected based on the ejection pressure value of the coal rock sample to be detected, which is acquired by the thin film pressure sensor, comprises the following steps:
and acquiring a plurality of ejection pressure values of the coal rock sample to be detected based on all the miniature pressure sensors in the film pressure sensors, and taking the average value of the plurality of ejection pressure values as the impact intensity.
According to the device for measuring the coal rock impact intensity, after the impact intensity of the coal rock sample to be detected is determined, the device further comprises:
and counting the distribution condition of the broken block bodies according to the broken block bodies to be detected after the coal rock sample to be detected in the bearing and flushing box is broken.
The invention also provides a method for measuring the coal rock impact intensity, which is realized by the device for measuring the coal rock impact intensity and comprises the following steps:
placing a coal rock sample to be detected in a bearing impact box, and pressurizing the coal rock sample to be detected based on a rock press;
based on a film pressure sensor arranged on the inner wall of the impact bearing box, under the loading action of the rock press machine on the coal rock sample to be detected, acquiring an ejection pressure value of a crushed block of the coal rock sample to be detected;
and determining the impact intensity of the coal and rock sample to be detected based on the ejection pressure value of the coal and rock sample to be detected, which is acquired by the film pressure sensor.
According to the method for measuring the coal rock impact intensity, provided by the invention, the ejection pressure value of the crushed block of the coal rock sample to be detected is obtained under the loading action of the rock press machine, and the method comprises the following steps:
and acquiring an ejection pressure value of the crushed block of the coal rock sample to be detected ejected onto the film pressure sensor after the coal rock sample to be detected is in the loading action of the rock press and is subjected to impact damage.
According to the device and the method for measuring the coal rock impact intensity, the coal rock sample to be detected is placed in the impact bearing box, the coal rock sample to be detected is pressurized based on the rock press machine, the ejection pressure value of the coal rock sample to be detected is obtained based on the thin film pressure sensor arranged on the inner wall of the impact bearing box under the condition that the coal rock sample to be detected is subjected to impact damage, the impact intensity of the coal rock sample to be detected is calculated according to the ejection pressure value, accurate quantitative analysis of the coal rock impact intensity to be detected is achieved, and accuracy of evaluation of the coal rock sample to be detected is improved.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a device for measuring coal rock impact intensity provided by the present invention;
FIG. 2 is a schematic wiring diagram of a data processing terminal provided by the present invention;
FIG. 3 is a schematic diagram of a rock press configuration provided by the present invention;
FIG. 4 is a schematic view of the operation of the rock press provided by the present invention;
FIG. 5 is a schematic flow chart of the method for measuring coal rock impact intensity provided by the invention.
Reference numerals:
101: a punching bearing box; 102: a rock press; 103: a membrane pressure sensor;
104: a data processing terminal; 105: detecting a coal rock sample to be detected; 106: a laser diode;
107: a work table; 108: loading an oil cylinder; 109: a loading plate; 110: a signal transmission line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a device for measuring coal rock impact intensity provided by the invention. Referring to fig. 1, the device for measuring coal rock impact intensity provided by the invention comprises: a punch-receiving box 101, a rock press 102, a diaphragm pressure sensor 103 and a data processing terminal 104.
The following describes each part of the device for measuring coal rock impact intensity.
The impact bearing box 101 is a cylindrical box body with an opening at the upper part and is used for placing the coal rock sample 105 to be detected.
After the coal rock sample 105 to be detected is obtained, the coal rock sample 105 to be detected is placed inside the cylindrical impact bearing box 101 with an opening at the upper part, and then the impact intensity of the coal rock sample 105 to be detected is measured. After the impact intensity is measured, broken blocks formed after the coal rock sample 105 to be detected is damaged are all kept in the impact bearing box 101, so that particle size screening is convenient to perform subsequently, and the particle size distribution condition of the broken blocks is further analyzed.
Alternatively, the punch bearing box 101 may be made of a steel plate, and the inner wall of the punch bearing box is polished, and the specific dimensions may be: 150mm in diameter, 100mm in height and 5mm in wall thickness.
The rock press 102 is used for pressurizing a coal rock sample 105 to be detected. After the coal rock sample 105 to be detected is placed in the thrust bearing box 101, the thrust bearing box 101 in which the coal rock sample 105 to be detected is placed on the table of the rock press 102. The rock press 102 may pressurize the coal rock sample 105 to be tested in the thrust box 101 by moving the loading cylinder.
The coal rock sample 105 to be detected is a selected coal rock sample needing coal rock impact intensity measurement. The selected coal rock sample 105 to be detected is a cylindrical coal rock with the diameter smaller than that of the impact bearing box 101. After the coal rock sample 105 to be detected is obtained, the obtained coal rock sample 105 to be detected is placed in the impact bearing box 101, and the rock press machine 102 is used for pressurizing the coal rock sample 105 to be detected placed in the impact bearing box 101, so that the impact test of the coal rock sample 105 to be detected is realized.
And the film pressure sensor 103 is positioned on the inner wall of the impact bearing box 101 and used for acquiring the ejection pressure value of the broken block of the coal rock sample 105 to be detected under the loading action of the rock press machine 102 on the coal rock sample 105 to be detected.
The film pressure sensor is characterized in that a modern film preparation technology is utilized to deposit a film strain resistor on a metal elastic matrix, and the film strain resistor has the performances of high precision, good creep property, strong interference resistance and the like, so that the film pressure sensor is widely applied to pressure measurement in relevant fields of aerospace, mechanical manufacturing, civil mining and the like at present. The film pressure sensor has the thickness as low as hundreds of nanometers to dozens of micrometers, can directly make a film on the surface of a part to be detected without influencing the internal environment of equipment, is simple to manufacture, and is beneficial to realizing the integrated manufacture of structure and perception.
The data processing terminal 104, as shown in fig. 2, the wiring diagram of the data processing terminal provided by the present invention, the data processing terminal 104 is connected to the film pressure sensor 103 on the inner wall of the impact receiving box 101 based on the signal transmission line 110. The data processing terminal 104 is configured to determine the impact intensity of the coal rock sample 105 to be detected based on the ejection pressure value of the coal rock sample 105 to be detected, which is obtained by the thin film pressure sensor 103.
The data processing terminal 104 is connected with the film pressure sensor through a signal transmission line 110 and receives the ejection pressure value of the broken block of the coal rock sample 105 to be detected, which is acquired by the film pressure sensor 103.
The data processing terminal 104 is provided with data processing software, receives the ejection pressure value of the coal rock sample 105 to be detected, analyzes the acquired ejection pressure value, and determines the impact intensity of the coal rock sample 105 to be detected.
It can be understood that the film pressure sensor 103 is provided with a plurality of micro sensors, and the ejection pressure values of the coal rock sample 105 to be detected in the impact bearing box 101 at all directions of the broken block body of the rock press 102 are obtained. According to the analysis of the ejection pressure values of the coal rock sample 105 to be detected at the positions of the rock press machine 102 in all directions, the impact intensity of the coal rock sample 105 to be detected can be obtained.
The impact intensity reflects the intensity of coal rock breakage when the coal rock sample 105 to be detected is subjected to loading, and the quantitative analysis of the impact intensity of the coal rock sample 105 to be detected can be realized according to the quantitative analysis of the ejection pressure values of the coal rock sample 105 to be detected at the positions of the rock press machine 102 in all directions.
The process for measuring the coal rock impact intensity of the coal rock sample 105 to be detected comprises the following steps: the punching box 101 in which the coal rock sample 105 to be detected is placed on the table of the rock press 102. The center of the movable loading oil cylinder of the rock press 102 is consistent with the center of the impact bearing box 101, so that the movable loading oil cylinder of the rock press 102 can completely contact the cylindrical coal rock sample of the coal rock sample 105 to be detected when moving downwards, and the cylindrical coal rock sample of the coal rock sample 105 to be detected is pressurized. In the process that the rock press machine 102 presses the coal rock sample 105 to be detected, the pressure sensor 103 arranged on the inner wall of the impact bearing box 101 obtains the ejection pressure value of the broken block of the coal rock sample 105 to be detected, and transmits the ejection pressure value of the coal rock sample 105 to be detected to the data processing terminal 104 through the signal transmission line 110. And the data processing software in the data processing terminal 104 analyzes the obtained ejection pressure value according to the obtained ejection pressure value of the coal-rock sample 105 to be detected, and determines the impact intensity of the coal-rock sample 105 to be detected.
According to the device for measuring the coal rock impact intensity, the coal rock sample to be detected is placed in the impact bearing box, the coal rock sample to be detected is pressurized based on the rock press machine, the ejection pressure value of the coal rock sample to be detected is obtained based on the thin film pressure sensor arranged on the inner wall of the impact bearing box under the condition that the coal rock sample to be detected is damaged under the loading effect, the impact intensity of the coal rock sample to be detected is calculated according to the ejection pressure value, accurate quantitative analysis of the coal rock impact intensity to be detected is achieved, and accuracy of evaluation of the coal rock sample to be detected is improved.
In one embodiment, the step of obtaining the ejection pressure value of the coal rock sample 105 to be detected under the loading action of the rock press 102 includes: under the loading action of the rock press 102, after the coal rock sample 105 to be detected is damaged, the ejection pressure value of the broken block of the coal rock sample 105 to be detected, which is ejected to the film pressure sensor 103, is obtained.
The coal rock sample 105 to be detected is loaded by using the rock press machine 102, under the loading action of the rock press machine 102, the coal rock sample 105 to be detected can be damaged, a part of a broken block formed by the damage is ejected to the film pressure sensor 103, and the film pressure sensor 103 can acquire the pressure generated by the impact of the broken block of the coal rock due to the ejection pressure value formed on the film pressure sensor 103 by the ejection impact of the broken block. The thin film pressure sensor 103 acquires pressure generated by the collision of the coal rock crushing block body, and the pressure generated by the collision of the coal rock crushing block body is used as an ejection pressure value of the coal rock sample 105 to be detected.
It can be understood that the coal rock sample 105 to be detected is under the loading action of the rock press 102, and when the coal rock sample 105 to be detected is damaged, a plurality of broken blocks are formed by the damage and are ejected to different positions on the film pressure sensor 103. The film pressure sensor 103 is composed of a plurality of micro sensors, so that a plurality of ejection pressure values generated by the impact of the coal rock crushing block can be obtained. After the plurality of ejection pressure values are obtained, determining the impact intensity of the coal rock sample 105 to be detected according to the obtained plurality of ejection pressure values.
According to the coal rock impact intensity measuring device provided by the embodiment of the invention, under the condition that the coal rock sample to be detected is damaged under the loading action, the ejection pressure value of the ejection of the crushed block of the coal rock sample to be detected onto the film pressure sensor is obtained after the coal rock sample to be detected is damaged, so that the ejection pressure value of the coal rock sample to be detected is obtained, and a foundation is provided for the subsequent determination of the impact intensity of the coal rock sample to be detected.
In one embodiment, further comprising: a laser diode 106; the laser diode 106 is located at the head-to-tail closed position of the film pressure sensor 103 and used for determining the start position mark of the coal rock sample 105 to be detected.
The data processing terminal 104 can determine a damaged position of the coal rock sample 105 to be detected under the loading action of the rock press 102 and a damaged grade corresponding to the damaged position according to the initial position mark, and determine the accuracy of the ejection pressure value of the damaged position according to the damaged grade and the ejection pressure value of the damaged position acquired by the film pressure sensor 103.
The film pressure sensor 103 is closely arranged along the inner wall of the punch-receiving box 101. Wherein, the film pressure sensor 103 is composed of a series of miniature pressure sensors, is in a flexible sheet shape, is adhered to the inner wall of the impact bearing box, and is closed end to end. A row of laser diodes is arranged at the head and tail closed positions of the film pressure sensor 103, and can emit laser spots towards the interior of the box perpendicular to the impact bearing box 101.
Optionally, the laser diodes 106 emit laser points to the coal rock sample, laser points emitted by the rows of laser diodes form laser point lines on the surface of the coal rock sample 105 to be detected, a marking pen is used for drawing a start position marking line on the surface of the coal rock sample 105 to be detected along the laser point lines, a direction arrow is drawn on the start position marking line along the counterclockwise direction, and position marking of the coal rock sample 105 to be detected is completed.
It can be understood that after the initial position of the coal rock sample 105 to be detected is marked, and the coal rock sample 105 to be detected is sent to be crushed, the specific position of the crushing can be located according to the determined initial position. After the initial position mark of the coal rock sample 105 is determined, different positions of the coal rock sample 105 to be detected in the damage can be grasped, the damage condition of the damaged positions is determined, and the damage condition is compared with the measurement result of the data processing terminal.
After marking the initial position of the coal rock sample 105 to be detected, the damage grade of the damage position of the coal rock sample 105 to be detected under the loading action of the rock press 102 can be determined when the coal rock sample 105 to be detected is under the loading action. The crushing grade can be determined after classification according to the damage condition of the coal rock sample to be detected. After the film pressure sensor 103 obtains the pressure of the coal rock sample 105 to be detected under the loading action of the rock press 102, the specific position of the pressure under the loading action and the size of the ejection pressure value can also be obtained. After the coal rock sample 105 to be detected is under the pressure of the loading action of the rock press 102, the damage condition of the crushing position of the coal rock sample 105 to be detected is known, and the corresponding damage grade can be obtained. The ejection pressure value of the actual crushing position can also be acquired by the film pressure sensor 103. The specific position and the ejection pressure value of the pressure subjected to the loading action obtained by the film pressure sensor 103 are compared with the damage grade of the actual damage position, so that the accuracy of the ejection pressure value obtained by the film pressure sensor 103 can be evaluated.
According to the coal rock impact intensity measuring device provided by the embodiment of the invention, the mark of the initial position of the coal rock sample to be detected is determined through the laser diode, the damage grade corresponding to the broken position of the coal rock sample to be detected is determined, and the accuracy of the ejection pressure value of the broken position is measured according to the damage grade and the ejection pressure value of the broken position obtained by the thin film pressure sensor.
In one embodiment, the invention provides a rock press as shown in figure 3. The rock press 102 comprises: a workbench 107, a loading oil cylinder 108 and a loading plate 109; the workbench 107 is used for placing the punch bearing box 101; the lower part of the loading oil cylinder 108 is connected with a loading plate 109, and the loading oil cylinder 108 is used for driving the loading plate 109 to move downwards and generating pressure of the coal rock sample 105 to be detected; the center of the loading plate 109 coincides with the center of the punch-receiving box 101 on the workbench 107.
When the coal rock to be detected is punched and detected, as shown in fig. 4, which is a working schematic diagram of the rock press provided by the invention, the punch bearing box 101 of the coal rock sample 105 to be detected is placed on the workbench 107 of the rock press 102. Wherein, the cylindrical coal rock sample of the coal rock sample 105 to be detected is ensured to be positioned at the center of the impact bearing box 101, the center of a loading oil cylinder 108 of the rock press machine 102 is consistent with the center of the impact bearing box 101, and the lower part of the loading oil cylinder 108 is connected with a loading plate 109. So that when the loading cylinder of the rock press 102 moves downward, the loading plate 109 can completely contact the cylindrical coal rock sample of the coal rock sample 105 to be detected, and pressurize the coal rock sample 105 to be detected.
The coal rock impact intensity measuring device provided by the embodiment of the invention comprises the following components by determining a rock press machine: the lower part of the loading oil cylinder is connected with the loading plate, and the loading oil cylinder is used for driving the loading plate to move downwards and generate pressure of a coal rock sample to be detected, so that the pressure is provided when the coal rock sample to be detected is detected.
In one embodiment, after obtaining the ejection pressure value of the crushed block of the coal rock sample 105 to be detected, the method further includes: and determining a cylindrical pressure cloud picture of the coal rock sample 105 to be detected according to the ejection pressure value and the position corresponding to the ejection pressure value determined by the film pressure sensor 103.
The cylindrical pressure cloud picture is a three-dimensional space, and the cylindrical pressure cloud picture of the coal rock sample 105 to be detected can be constructed at the position where the ejection pressure value of the film pressure sensor 103 and the corresponding ejection pressure value determined by the film pressure sensor 103 are obtained. It is understood that the cylindrical pressure cloud is a pressure cloud of the size of the thin film pressure sensor.
It can be understood that the pressure distribution condition of the three-dimensional position of the coal rock sample 105 to be detected can be more visually presented according to the cylindrical pressure cloud chart of the coal rock sample 105 to be detected, so that the pressure condition received by the coal rock sample to be detected can be more comprehensively evaluated.
According to the device for measuring the coal rock impact intensity, the cylindrical pressure nephogram of the coal rock sample to be detected is determined through the ejection pressure value of the broken block of the coal rock sample to be detected and the corresponding position of the ejection pressure value determined by the thin film pressure sensor, and the pressure distribution condition of the coal rock sample to be detected is displayed in a more visual mode.
In one embodiment, after determining the cylindrical pressure cloud chart of the coal rock sample to be detected, the method further includes: and based on the cylindrical surface pressure cloud picture of the coal-rock sample to be detected and the size of the coal-rock sample to be detected, inverting to obtain a three-dimensional impact intensity cloud picture of the coal-rock sample to be detected.
After the cylindrical pressure cloud picture of the coal rock sample 105 to be detected is determined, the three-dimensional impact intensity cloud picture of the coal rock sample 105 to be detected can be obtained by scaling and inverting according to the cylindrical pressure cloud picture of the coal rock sample 105 to be detected and the three-dimensional size of the coal rock sample to be detected. Wherein, the cylindrical surface pressure cloud picture is a pressure cloud picture of the size of the film pressure sensor.
It can be understood that according to the three-dimensional impact intensity cloud chart of the coal rock sample 105 to be detected, the impact intensity condition of the three-dimensional position of the coal rock sample 105 to be detected can be displayed more visually, and the impact intensity received by the coal rock sample to be detected can be evaluated more comprehensively.
According to the coal rock impact intensity measuring device provided by the embodiment of the invention, the three-dimensional impact intensity cloud chart of the coal rock sample to be detected is obtained through inversion of the impact intensity of the coal rock sample to be detected and the corresponding position of the impact intensity in the coal rock sample to be detected, the impact intensity condition of the coal rock sample to be detected is displayed in a more visual mode, and a foundation is provided for subsequent further analysis.
In one embodiment, determining the impact intensity of the coal rock sample 105 to be detected based on the ejection pressure value of the coal rock sample 105 to be detected, which is acquired by the thin film pressure sensor 103, includes: acquiring a plurality of ejection pressure values of the coal rock sample 105 to be detected based on all the miniature pressure sensors in the film pressure sensor 103, and taking the average value of the plurality of ejection pressure values as the impact intensity.
The film pressure sensor 103 is provided with a plurality of micro sensors, and can acquire a plurality of ejection pressure values of the coal rock sample 105 to be detected at different positions. And averaging the obtained ejection pressure values, and taking the determined average value as the impact intensity of the coal rock sample 105 to be detected.
According to the coal rock impact intensity measuring device provided by the embodiment of the invention, the ejection pressure values of the coal rock sample to be detected are obtained based on all the miniature pressure sensors in the film pressure sensor, the average value of the ejection pressure values is used as the impact intensity, the impact intensity of the coal rock sample to be detected is determined, and the quantitative analysis of the coal rock sample to be detected is realized.
In one embodiment, after determining the impact intensity of the coal rock sample to be detected, the method further includes: and counting the distribution condition of the broken block bodies according to the broken block bodies to be detected after the coal rock sample to be detected in the bearing and flushing box is broken.
After the impact intensity of the coal rock sample 105 to be detected is determined, the coal rock sample 105 to be detected is crushed due to pressurization of the rock press 102, and crushed blocks formed after the coal rock sample 105 to be detected is crushed are all retained in the impact bearing box 101.
After the broken block bodies of the coal rock sample 105 to be detected in the impact bearing box 101 after being broken are determined, the distribution condition of the broken block bodies is counted, and further analysis of the coal rock sample 105 to be detected along with pressure change can be achieved according to the distribution condition of the broken block bodies.
According to the coal rock impact intensity measuring device provided by the embodiment of the invention, the distribution condition of the broken blocks is counted through the broken blocks after the coal rock sample to be detected is broken in the impact bearing box, so that a foundation is provided for further analysis of the coal rock sample to be detected.
The method for measuring coal-rock impact intensity provided by the invention is described below, and the method for measuring coal-rock impact intensity described below and the device for measuring coal-rock impact intensity described above can be referred to in a corresponding manner.
Referring to fig. 5, the method for measuring coal rock impact intensity provided by the invention comprises the following steps:
and step 530, determining the impact intensity of the coal and rock sample to be detected based on the ejection pressure value of the coal and rock sample to be detected, which is obtained by the film pressure sensor.
According to the method for measuring the coal rock impact intensity, the coal rock sample to be detected is placed in the impact bearing box, the coal rock sample to be detected is pressurized based on the rock press, the ejection pressure value of the coal rock sample to be detected is obtained based on the thin film pressure sensor arranged on the inner wall of the impact bearing box under the condition that the coal rock sample to be detected is damaged under the loading effect, the impact intensity of the coal rock sample to be detected is calculated according to the ejection pressure value, the accurate quantitative analysis of the coal rock impact intensity to be detected is achieved, and the accuracy of evaluation of the coal rock sample to be detected is improved.
Based on above-mentioned embodiment, treat that the coal petrography sample is in under the loading effect of rock press, acquire the ejection pressure value of the broken block body of treating the coal petrography sample, include:
and under the loading action of the rock press, acquiring a pressure value of the broken block body of the coal rock sample to be detected, which is ejected to the film pressure sensor, after the coal rock sample to be detected is damaged.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable 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 methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A coal petrography shock intensity's measuring device which characterized in that includes: the device comprises a punching bearing box, a rock press, a film pressure sensor and a data processing terminal;
the punching bearing box is a cylindrical box body with an opening at the upper part and is used for placing a coal rock sample to be detected;
the rock press is used for pressurizing the coal rock sample to be detected;
the thin film pressure sensor is positioned on the inner wall of the impact bearing box and used for acquiring an ejection pressure value of a crushed block of the coal and rock sample to be detected under the loading action of the rock press machine;
the data processing terminal is connected with the film pressure sensor on the basis of a signal transmission line and used for determining the impact intensity of the coal and rock sample to be detected on the basis of the ejection pressure value of the broken block of the coal and rock sample to be detected, which is acquired by the film pressure sensor.
2. The device for measuring coal rock impact intensity according to claim 1, wherein the device for obtaining the ejection pressure value of the broken block of the coal rock sample to be detected under the loading action of the rock press comprises:
and under the loading action of the rock press, acquiring an ejection pressure value of the broken block of the coal rock sample to be detected, which is ejected to the film pressure sensor, after the coal rock sample to be detected is subjected to impact damage.
3. The coal rock impact intensity measurement device of claim 1, further comprising: a laser diode;
and the laser diode is positioned at the head-tail closed position of the film pressure sensor and is used for determining the mark of the initial position of the coal rock sample to be detected.
4. The coal rock impact intensity measurement device of claim 1, wherein the rock press comprises: the device comprises a workbench, a loading oil cylinder and a loading plate;
the workbench is used for placing the punch bearing box;
the lower part of the loading oil cylinder is connected with the loading plate, and the loading oil cylinder is used for driving the loading plate to move downwards and generating pressure on the coal rock sample to be detected;
the center of the loading plate is coincided with the center of the punching bearing box on the workbench.
5. The device for measuring coal petrography impact intensity of claim 1, wherein after obtaining the ejection pressure value of the broken block of the coal petrography sample to be detected, the device further comprises:
and determining a cylindrical surface pressure cloud chart of the coal rock sample to be detected according to the ejection pressure value and the position corresponding to the ejection pressure value determined by the film pressure sensor.
6. The device for measuring coal petrography impact intensity of claim 5, wherein after determining the cylinder pressure cloud of the coal petrography sample to be detected, further comprising:
and obtaining a three-dimensional impact intensity cloud picture of the coal rock sample to be detected through inversion based on the cylindrical pressure cloud picture of the coal rock sample to be detected and the size of the coal rock sample to be detected.
7. The coal rock impact intensity measuring device according to claim 1, wherein the determining of the impact intensity of the coal rock sample to be detected based on the ejection pressure value of the coal rock sample to be detected, which is obtained by the thin film pressure sensor, comprises:
and acquiring a plurality of ejection pressure values of the coal rock sample to be detected based on all miniature pressure sensors in the film pressure sensors, and taking the average value of the ejection pressure values as the impact intensity.
8. The coal rock impact intensity measuring device of claim 1, wherein after determining the impact intensity of the coal rock sample to be detected, the device further comprises:
and counting the distribution condition of the broken blocks according to the broken blocks to be detected in the impact bearing box after the coal rock sample is broken.
9. A method for measuring coal-rock impact intensity based on the device for measuring coal-rock impact intensity according to any one of claims 1 to 8, comprising:
placing a coal rock sample to be detected in a bearing impact box, and pressurizing the coal rock sample to be detected based on a rock press;
based on a film pressure sensor arranged on the inner wall of the impact bearing box, acquiring an ejection pressure value of a broken block of the coal rock sample to be detected under the loading action of the rock press;
and determining the impact intensity of the coal and rock sample to be detected based on the ejection pressure value of the broken block of the coal and rock sample to be detected, which is acquired by the film pressure sensor.
10. The method for measuring coal-rock impact intensity according to claim 9, wherein the step of obtaining the ejection pressure value of the crushed block of the coal-rock sample to be detected under the loading action of the rock press comprises the following steps:
and acquiring an ejection pressure value of the crushed block of the coal rock sample to be detected ejected onto the film pressure sensor after the coal rock sample to be detected is in the loading action of the rock press and is subjected to impact damage.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116359042A (en) * | 2023-06-01 | 2023-06-30 | 中国人民解放军国防科技大学 | Auxiliary dynamic load testing device and method and dynamic load testing equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116359042A (en) * | 2023-06-01 | 2023-06-30 | 中国人民解放军国防科技大学 | Auxiliary dynamic load testing device and method and dynamic load testing equipment |
| CN116359042B (en) * | 2023-06-01 | 2023-08-15 | 中国人民解放军国防科技大学 | Auxiliary dynamic load testing device and method and dynamic load testing equipment |
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