阅读说明：本技术 一种简便定量测量煤中镜质组含量的方法 (Method for simply and quantitatively measuring vitrinite content in coal ) 是由 焦小赞 王娟 王根选 姚田 尚飞宇 武燕云 于 2020-08-17 设计创作，主要内容包括：本发明公开了一种简便定量测量煤的镜质组含量的方法,通过高倍照相机测量镜质组含量不同的单种煤,根据测量点数,计算出平均单帧照片上的镜质组测量点数；所述单帧照片的镜质组测量点数与国标法测定的镜质组含量存在线性关系,根据所述线性关系,进而计算出所测单种煤的镜质组含量；该方法测量速度快,对分析人员的专业水平要求低。(The invention discloses a method for simply and quantitatively measuring the vitrinite content of coal, which comprises the steps of measuring single coal with different vitrinite contents by a high-power camera, and calculating vitrinite measurement points on an average single-frame photo according to the measurement points; the number of the specular component measurement points of the single-frame photo has a linear relation with the specular component content measured by a national standard method, and the specular component content of the measured single coal is further calculated according to the linear relation; the method has the advantages of high measurement speed and low requirement on the professional level of an analyst.)

1. A simple and convenient quantitative method for measuring the vitrinite content in the coal, characterized by, measure the single coal with different vitrinite content through the high power camera, according to measuring the number of points, calculate the vitrinite measuring point number on the average single-frame photo; the number of the specular component measurement points of the single-frame photo has a linear relation with the specular component content measured by a national standard method, and the specular component content of the single coal to be measured is further obtained according to the linear relation.

2. The method for conveniently and quantitatively measuring the vitrinite content in the coal as claimed in claim 1, which comprises the following steps:

1) preparing a pulverized coal polished section for measuring a coal sample, placing the pulverized coal polished section on a reflecting polarization microscope objective table, focusing, and correcting the center of an objective lens;

2) opening the image shooting software, setting relevant parameters, and shooting at fixed points by a camera according to a set route until all the polished sections finish shooting the photos;

3) all the pictures are checked and selected;

4) opening a measuring program, and testing the coal rock reflectivity of the sample;

5) and calculating the number of the specular component measurement points of the average single-frame photo, and obtaining the specular component content of the single coal according to a linear relation graph of the number of the specular component measurement points and the specular component content measured by a national standard method.

3. The method for conveniently and quantitatively measuring the vitrinite content in the coal as claimed in claim 2, wherein the examination and deletion process of the photos in the step 3) is: and examining the definition of all the photos, deleting the unclear photos when the number of the unclear photos accounts for less than or equal to 3% of all the photos, and performing additional shooting when the number of the unclear photos accounts for more than 3% of all the photos.

4. The method for conveniently and quantitatively measuring the vitrinite content in the coal as claimed in claim 1 or 2, wherein the linear relation between the number of vitrinite measurement points of the single-frame photo and the vitrinite content measured by the national standard method is as follows: y = aX + b, wherein the parameter a ranges from 0.40 to 0.55; the range of parameter b is: 40-47; wherein Y refers to the content of the specular component determined by a national standard method, and X refers to the number of specular component measurement points in a single-frame photo.

Technical Field

The invention belongs to the technical field of a method for measuring vitrinite content of coal, and particularly relates to a method for simply and quantitatively measuring vitrinite content of coal.

Background

Coal rock analysis of coal quality of single coal generally requires the determination of reflectance distribution and average values and microscopic components. For the determination of the micro-components, according to the requirements of GB/T8899-2013 'method for determining the micro-components and minerals of coal', the pulverized coal polished section is placed under a reflecting polarizer during the measurement, the points of various micro-components and minerals are counted by a point counting method through the equal step length movement of an objective table, and then the proportional content of each component is calculated. The determination method has high requirements on the professional level of an analyst, the analyst is required to accurately identify each microscopic component, and if the coal sample needs to be subjected to coal rock reflectivity analysis, the light sheet needs to be observed again, so that time and labor are wasted. In addition, the point counting method cannot represent the area of vitrinite, and has certain defect property for accurately researching the coal quality of the coal. Therefore, the invention provides a method for simply comparing the vitrinite content of single coal.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides a simple method for quantitatively measuring the vitrinite content of coal, which has high measuring speed and relatively low requirement on the professional level of an analyst.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a simple and convenient quantitative method for measuring the vitrinite content in the coal, measure the single coal with different vitrinite contents through the high power camera, according to measuring the number of points, calculate the vitrinite measuring number of points on the average single-frame photo; the number of the specular component measurement points of the single-frame photo has a linear relation with the specular component content measured by a national standard method, and the specular component content of the single coal to be measured is further calculated according to the linear relation.

Further, a method for simply and quantitatively measuring the vitrinite content in coal comprises the following steps:

1) preparing a pulverized coal polished section for measuring a coal sample, placing the pulverized coal polished section on a reflecting polarization microscope objective table, focusing, and correcting the center of an objective lens;

2) opening the image shooting software, setting relevant parameters, and shooting at fixed points by a camera according to a set route until all the polished sections finish shooting the photos;

3) all the pictures are checked and selected;

4) and opening a measuring program, and testing the coal rock reflectivity of the sample.

5) Calculating the number of the specular component measurement points of the average single-frame photo, and calculating the specular component content of the single coal according to a linear relation graph of the number of the specular component measurement points and the specular component content measured by a national standard method.

Further, the process of checking and deleting the photos in the step 3) refers to: and examining the definition of all the photos, deleting the unclear photos when the number of the unclear photos accounts for less than or equal to 3% of all the photos, and performing additional shooting when the number of the unclear photos accounts for more than 3% of all the photos.

Further, the linear relationship between the number of specular component measurement points of the single-frame photo and the specular component content measured by the national standard method is as follows: y = aX + b, wherein the parameter a ranges from 0.40 to 0.55; the range of parameter b is: 40-47; wherein Y refers to the content of the specular component determined by a national standard method, and X refers to the number of specular component measurement points in a single-frame photo.

Compared with the prior art, the invention has the following beneficial effects:

the method is fast and has low requirement on the professional level of an analyst. By utilizing the high-power camera technology, on the premise that the number of pictures is basically consistent according to different vitrinite contents of various coal types, the vitrinite measurement point number on each frame of picture can be calculated according to the measurement point number, and further the vitrinite component contents of different coal types can be quantitatively calculated.

Drawings

FIG. 1 is a linear relationship diagram of the number of specular colonies in a single-frame photograph and the specular colony content measured by the national standard method in the embodiment of the invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of the present invention are described in detail below with reference to examples, but the scope of protection is not limited thereto.

A simple and convenient quantitative method for measuring the vitrinite content in the coal, measure the single coal with different vitrinite contents through the high power camera, according to measuring the number of points, calculate the vitrinite measuring number of points on the average single-frame photo; the number of the specular component measurement points of the single-frame photo has a linear relation with the specular component content measured by a national standard method, and the specular component content of the single coal to be measured is further calculated according to the linear relation. The linear relation between the number of the specular component measurement points of the single-frame photo and the specular component content measured by the national standard method is as follows: y = (0.40-0.55) X + (40-47), wherein Y refers to the content of the specular component determined by a national standard method, and X refers to the number of measured points of the specular component in a single-frame photo.

When the reflectivity of the coal rock is analyzed by an image method, firstly, the rapid automatic focusing of a stepping motor and an objective table is utilized, and when the stepping motor automatically moves the polished section in equal step length, the polished section of the coal rock is shot into a photo by a high-power camera. During measurement, the number of points and the occupied proportion of the measured specular quality group in the picture are synchronously obtained by processing the data of the specular quality group in each frame of picture. According to different vitrinite contents of each coal type, on the premise of approximately the same number of pictures, the vitrinite measurement point number on each frame of picture can be calculated according to the reflectivity measurement point number, and the vitrinite component content can be calculated.

In practical application, the linear relationship between the number of specular component measurement points of the single-frame photo and the specular component content measured by the national standard method is a range: formula Y = aX + b, parameter a ranging from 0.40 to 0.55; the range of parameter b is: 40-47. The preferred embodiment may select: y =0.5X +44.11, Y =0.40X +40, Y =0.55X +47, Y =0.40X +44, Y =0.40X +47, Y =0.55X +40, Y =0.55X + 45.