CN105785125A - Coal rock identification method based on digital dual-clamp phase volometer - Google Patents
Coal rock identification method based on digital dual-clamp phase volometer Download PDFInfo
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Abstract
The present invention provides a rapid and accurate coal content determination method. According to the method, a digital dual-clamp phase volometer is used to measure whether an RLC series circuit is capacitive or inductive to judge whether the coal content in a coal rock mixture is higher than a minable lowest coal content. The measurement result of the testing method is accurate and reliable, and reliable coal rock identification information is provided for the production processes such as automatic mining, automatic coal drawing, and the automatic gangue selection.
Description
Technical field
The present invention relates to a kind of coal content method of discrimination suitable in underground coal mine, especially a kind of Coal-rock identification method based on digital double-clamp phase volometer.
Background technology
Coal is one of valuable source of China, in coal mining and production process, it is necessary to use the identification technology of coal and rock, and for example cylinder is mined, and driving, top coal caving, raw coal selects in the production links such as spoil.Namely coal petrography identification by a kind of method, make coal-winning machine have the ability of automatic tracing coal petrography, and a kind of practicality reliably Coal-rock identification method can ensure that the exploitation of coal is safer, and can increase economic efficiency.Can increase the efficiency of coal mining activity, reduce the downtime of maintenance of equipment amount, alleviate abrasion and the damage of equipment, meanwhile, reduce in air containing coal amount.On the other hand, automatically improve cylinder cutting height by coal petrography identification technology coal mining function, also can improve the rate of extraction in coal seam, reduce the spoil in coal, the content of ash and sulfur.Therefore coal petrography identification technology becomes one of key technology of realizing coal mining automatization.
Owing to coal petrography identification technology is more and more important, researcher both domestic and external is all studying coal petrography identification technology better.External research starts from the 1950's, concentrated research through Chinese scholars and expert, propose the various reasonable conception about coal petrography identification technology, but the overwhelming majority does not have actually used value, the method that wherein can use, again because the difference of geological conditions, not having universality, use scope is severely limited.
Current existing Coal-rock identification method there is also very many-sided problem, such as: it is good that mnemonic cutting method is suitable for geological conditions, and the mine that coal seam is more smooth.For the coal-face that geological conditions is bad, method receives serious restriction.Radar detection system is the technology based on electromagnetic wave transmits, and the thickness that electromagnetic wave penetrates top coal is relevant with wavelength, and wavelength is more long, penetrate more deep, and the more long Measurement Resolution of wavelength is more low, the contradiction measuring scope and certainty of measurement is difficult to thoroughly solve, and method is difficult to reach the practical stage.Coal winning technology is had certain requirement by gamma ray method, namely must be stay certain thickness top coal, which decrease the rate of extraction, require in addition that roof and floor country rock must have radioelement, which greatly limits its application.Based on the Coal-rock identification method of detection pick vibration owing to rotating at coal mining process intermediate roll, thus the transmission of signal is greatly affected.In addition, amperometry, dust probe technique, the Coal-rock identification method such as sound detection method are complicated due to coal excavation apparatus stress in process of production, acutely, serious wear, the factors such as dust is big cause that these methods use scope and result of use to be severely limited in vibrations.
Solve accordingly, it would be desirable to a kind of or at least improve the coal petrography sorting technique of an intrinsic class or multi-class problem in art methods.
Summary of the invention
The present invention is that coal mining provides one coal content method of discrimination fast and accurately.It is capacitive or perception that the method utilizes digital double-clamp phase volometer to measure RLC series circuit, judge that in determinand, whether coal content is higher than adoptable minimum containing coal amount, the advantage of this method of testing is to install and simple to operate, convenient, measurement result is accurately and reliably, for automated mining, automatic coal discharge, automatization selects the production processes such as cash to provide reliable coal petrography identification information.
The present invention is claimed a kind of Coal-rock identification method based on digital double-clamp phase volometer, and the method comprises the steps:
S101, pure coal, pure rock sample that collection is come originally carry out sample analysis, pure coal, pure rock are respectively put in fixing capacitor, utilize electric impedance analyzer to obtain both capacitances, and the capacitance of pure coal is designated as C1, the capacitance of clean rock is C2；
S102, minimum puts between capacitor board containing coal amount Mixture Density Networks and rock by minable on colliery, utilizes electric impedance analyzer to measure capacitance；By the pure coal collected and clean rock, carry out proportioning according to minimum coal content minable on colliery, after modulation uniformly, the mixture of the two is put in ready capacitor, utilize electric impedance analyzer to measure capacitance, be designated as C0, wherein C0At C1And C2Between；
S103, it is determined that driving frequency
(inductance value is designated as L to the known inductance of power taking inductance value0), calculate formula according to the resonant frequency of RLC series resonant circuit and obtain:The frequency of order excitation is W0；
S104, it is determined that the coal content of thing to be identified
Capacitance respectively C when putting into pure coal, pure rock, minimum coal content in capacitor board has been respectively obtained by two steps of S101, S1021, C2And C0.Thing to be identified is put into capacitor board, and measuring RLC series circuit with digital double-clamp phase volometer is capacitive or perception, thus judging that whether the coal content of determinand is more than minable coal content；
Measuring RLC series circuit with digital double-clamp phase volometer is concretely comprising the following steps of capacitive or perception:
Inputted from the U end of digital double-clamp phase volometer by the voltage of circuit-under-test, electric current inputs from I jack through clamp (clamp current transformer), measures its phase place；
Work as C1<C0<C2Time, if recording phase place less than 90 °, circuit is perception, and now the coal content of determinand is less than minable coal content, not exploitation；If the phase place recorded is more than 270 °, circuit is capacitive, and now the coal content of determinand is more than minable coal content, it is possible to exploitation；
Work as C1>C0>C2Time, if recording phase place less than 90 °, circuit is perception, and now the coal content of determinand is more than minable coal content, it is possible to exploitation；If the phase place recorded is more than 270 °, circuit is capacitive, and now the coal content of determinand is less than minable coal content, not exploitation.
Accompanying drawing explanation
Fig. 1 is digital double-clamp phase volometer measuring circuit capacitive, perception schematic diagram；
Fig. 2 is RLC series circuit capacitive, perception change schematic diagram.
Detailed description of the invention
Below by specific embodiment, the invention will be further described, and following example are illustrative, is not determinate, it is impossible to limit protection scope of the present invention with this.
Know-why: RLC series circuit phase angle computing formula is
From formula it can be seen that driving frequency is constant, when capacitance diminishes, phase angle is negative value, and RLC series circuit becomes capacitive circuit；When capacitance become big time, phase angle be on the occasion of, RLC series circuit becomes inductive circuit.So can according to the digital double-clamp phase volometer measurement result to rlc circuit capacitive, perception, it is judged that whether the coal content of determinand is more than minable coal content.
Work as C1<C0<C2Time, the digital double-clamp phase volometer decision method (as shown in Figure 1) to inductive circuit, capacitive circuit: inputted from U end by the voltage of circuit-under-test, electric current inputs from I jack through clamp (clamp current transformer), measures its phase place.If recording phase place less than 90 °, then circuit is perception；If the phase place recorded is more than 270 °, then circuit is capacitive.
The Coal-rock identification method based on digital double-clamp phase volometer of the present invention, as it is shown in figure 1, specifically comprise the following steps that
S101, pure coal, pure rock sample that collection is come originally carry out sample analysis, pure coal, pure rock are respectively put in fixing capacitor, utilize electric impedance analyzer to obtain both capacitances, and the capacitance of pure coal is designated as C1, the capacitance of clean rock is C2；
S102, puts between capacitor board by minimum containing coal amount Mixture Density Networks and rock, utilizes electric impedance analyzer to measure capacitance；By the pure coal collected and clean rock, carry out proportioning according to minimum coal content minable on colliery, after modulation uniformly, the mixture of the two is put in ready capacitor, utilize electric impedance analyzer to measure capacitance, be designated as C0, wherein C0At C1And C2Between；
S103, it is determined that driving frequency
(inductance value is designated as L to the known inductance of power taking inductance value0), calculate formula according to the resonant frequency of RLC series resonant circuit and obtain:The frequency of order excitation is W0；
S104, it is determined that the coal content of thing to be identified
Capacitance respectively C when putting into pure coal, pure rock, minimum coal content in capacitor board has been respectively obtained by two steps of S101, S1021, C2And C0.Thing to be identified is put into capacitor board, and measuring RLC series circuit with digital double-clamp phase volometer is capacitive or perception, thus judging that whether the coal content of determinand is more than minable coal content.
Measuring RLC series circuit with digital double-clamp phase volometer is concretely comprising the following steps of capacitive or perception:
Inputted from the U end of digital double-clamp phase volometer by the voltage of circuit-under-test, electric current inputs from I jack through clamp (clamp current transformer), measures its phase place；
Work as C1<C0<C2Time, if recording phase place less than 90 °, circuit is perception, and now the coal content of determinand is less than minable coal content, not exploitation；If the phase place recorded is more than 270 °, circuit is capacitive, and now the coal content of determinand is more than minable coal content, it is possible to exploitation；
Work as C1>C0>C2Time, if recording phase place less than 90 °, circuit is perception, and now the coal content of determinand is more than minable coal content, it is possible to exploitation；If the phase place recorded is more than 270 °, circuit is capacitive, and now the coal content of determinand is less than minable coal content, not exploitation.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, it is possible to improved according to the above description or convert, all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (2)
1. the Coal-rock identification method based on digital double-clamp phase volometer, it is characterised in that the method comprises the steps:
S101, pure coal, pure rock sample that collection is come originally carry out sample analysis, pure coal, pure rock are respectively put in fixing capacitor, utilize electric impedance analyzer to obtain both capacitances, and the capacitance of pure coal is designated as C1, the capacitance of clean rock is C2；
S102, minimum puts between capacitor board containing coal amount Mixture Density Networks and rock by minable on colliery, utilizes electric impedance analyzer to measure capacitance；By the pure coal collected and clean rock, carry out proportioning according to minimum coal content minable on colliery, after modulation uniformly, the mixture of the two is put in ready capacitor, utilize electric impedance analyzer to measure capacitance, be designated as C0, wherein C0At C1And C2Between；
S103, it is determined that driving frequency
(inductance value is designated as L to the known inductance of power taking inductance value0), calculate formula according to the resonant frequency of RLC series resonant circuit and obtain:The frequency of order excitation is W0；
S104, it is determined that the coal content of thing to be identified
Capacitance respectively C when putting into pure coal, pure rock, minimum coal content in capacitor board has been respectively obtained by two steps of S101, S1021, C2And C0.Thing to be identified is put into capacitor board, and measuring RLC series circuit with digital double-clamp phase volometer is capacitive or perception, thus judging that whether the coal content of determinand is more than minable coal content；
Measuring RLC series circuit with digital double-clamp phase volometer is concretely comprising the following steps of capacitive or perception:
Inputted from the U end of digital double-clamp phase volometer by the voltage of circuit-under-test, electric current inputs from I jack through clamp (clamp current transformer), measures its phase place；
Work as C1<C0<C2Time, if recording phase place less than 90 °, circuit is perception, and now the coal content of determinand is less than minable coal content, not exploitation；If the phase place recorded is more than 270 °, circuit is capacitive, and now the coal content of determinand is more than minable coal content, it is possible to exploitation；
Work as C1>C0>C2Time, if recording phase place less than 90 °, circuit is perception, and now the coal content of determinand is more than minable coal content, it is possible to exploitation；If the phase place recorded is more than 270 °, circuit is capacitive, and now the coal content of determinand is less than minable coal content, not exploitation.
2. the method for claim 1, it is characterised in that: the described clamp of step S104 are clamp current transformer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111243036A (en) * | 2019-04-10 | 2020-06-05 | 泰州三凯工程技术有限公司 | Real-time data extraction and display method |
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