CN-122022462-A - Igneous rock erosion coal spontaneous combustion risk assessment method and system

CN122022462ACN 122022462 ACN122022462 ACN 122022462ACN-122022462-A

Abstract

The invention discloses a spontaneous combustion risk assessment method and system for igneous rock erosion coal, and relates to the technical field of risk assessment, wherein the method comprises the steps of receiving microstructure parameter data of raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal, and microcrystalline structure parameter data of the raw coal and igneous rock erosion coal; receiving a predetermined characteristic temperature point, inputting microstructure parameter data of raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal, microcrystalline structure parameter data of the raw coal and igneous rock erosion coal and the characteristic temperature point into a pre-established spontaneous combustion and heat prevention characteristic model of the coal, and outputting to obtain a spontaneous combustion risk assessment result of the igneous rock erosion coal relative to the raw coal.

Inventors

ZHANG LEILIN
REN KE
CHENG BING
YANG JINFENG
ZHANG XIANGFU
XIE XUDONG
LIU YILIN

Assignees

安徽理工大学

Dates

Publication Date: 20260512
Application Date: 20260126

Claims (10)

1. A method for spontaneous combustion risk assessment of igneous rock erosion coal, the method comprising the steps of: receiving microstructure parameter data of raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal and microcrystalline structure parameter data of the raw coal and igneous rock erosion coal; the microstructure parameter data of the raw coal and igneous rock erosion coal comprise porosity, average pore perimeter, pore area and average pore area, the functional group content data of the raw coal and igneous rock erosion coal comprise aromatic hydrocarbon content, oxygen-containing functional group content, aliphatic hydrocarbon content and hydroxyl content, and the microcrystalline structure parameter data of the raw coal and igneous rock erosion coal comprise aromatic layer spacing, effective stacking height, extensibility, aromaticity and average crystal stacking layer number; Receiving a predetermined characteristic temperature point, inputting microstructure parameter data of raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal, microcrystalline structure parameter data of the raw coal and igneous rock erosion coal and the characteristic temperature point into a pre-established spontaneous combustion and heat prevention characteristic model of the coal, and outputting to obtain a spontaneous combustion risk assessment result of the igneous rock erosion coal relative to the raw coal.
2. The igneous rock erosion coal spontaneous combustion risk assessment method according to claim 1, wherein the calculation formulas of the aromatic layer spacing, the effective stacking height and the extensibility are as follows: (1) (2) (3) Wherein lambda is the wavelength of X-ray, theta 002 、θ 100 is the diffraction angle corresponding to 002, 100 diffraction peak, beta 002 、β 100 is the half-width of 002, 100 diffraction peak, K 1 、K 2 is the Shelle constant; The calculation formula of the aromaticity f a is as follows: (4) wherein A002 and Agamma are the peak areas of 002 and gamma peaks; the average crystal stacking layer number N ave of the coal represents the stacking degree of the microcrystalline structure unit, and the calculation formula is as follows: (5) The degree of coalification characterizes the relative content of aromatic layers and fat layer packing structures in the coal, and since the interlayer spacing of the coal is between graphite and cellulose, the degree of coalification P of the coal can be calculated by using the following formula: (6) wherein 0.3975 and 0.3354 are the interlayer spacing of cellulose and graphite, respectively.
3. The igneous rock erosion coal spontaneous combustion risk assessment method according to claim 1, wherein the aliphatic hydrocarbon content adopts a ratio of-CH 2 -/-CH 3 to represent the length of aliphatic chains and the branching degree of the aliphatic side chains of the coal, and the calculation formula is as follows: (7) wherein-CH 2 -/-CH 3 represents the length of the aliphatic hydrocarbon chain and the degree of branching of the side chains; is-CH 2 -antisymmetric telescopic vibration absorption peak area near 2950-2920 cm -1 ; An antisymmetric stretching vibration absorption peak area of-CH 3 near 2990-2950 cm -1 ; the aromaticity I of the coal is an important index for measuring the aromaticity and the rank of the coal, and can be obtained by the ratio of the area of an aromatic ring substituted peak to the area of an aliphatic peak, and the calculation formula is as follows: (8) wherein: 、 Is the peak area of aromatic hydrocarbon and aliphatic hydrocarbon.
4. The igneous rock erosion coal spontaneous combustion risk assessment method according to claim 1, wherein the spontaneous combustion characteristics of the coal are characterized by the consumption rate of oxygen in the oxygen-containing functional group content, wherein the oxygen consumption rate calculation formula is: (9) wherein: Q is the air supply quantity; The method comprises the steps of (1) importing oxygen for a coal sample tank to be concentrated; S is the cross-sectional area of the coal sample tank, L is the height of the coal sample; The oxygen concentration is the outlet oxygen concentration of the coal sample tank.
5. The method for evaluating the spontaneous combustion risk of igneous rock erosion coal according to claim 1, wherein the predetermined characteristic temperature point is determined based on curve data of heat flows of raw coal and igneous rock erosion coal in a thermal reaction process and a differential heat flow.
6. The igneous rock erosion coal spontaneous combustion risk assessment method according to claim 5, wherein the curve data of the heat flow and the differential heat flow comprise an evaporation heat absorption stage TD2, a chemical adsorption and slow oxidation stage TD 2-TD 3, a pyrolysis stage TD 3-TD 4, a combustion heat release stage TD 4-TD 6 and a burnout stage > TD6.
7. The method for evaluating the spontaneous combustion risk of igneous rock erosion coal according to claim 1, wherein the pre-established spontaneous combustion heat-resistant characteristic model of the coal comprises a spontaneous combustion heat release risk coefficient C r and a spontaneous combustion heat release destructive coefficient C d , wherein the spontaneous combustion heat release risk coefficient C r is the reaction capacity of the coal from initial heat release to ignition in the spontaneous combustion process, and the spontaneous combustion heat release destructive coefficient C d is the magnitude of environmental destruction caused by high temperature caused by severe combustion of the coal.
8. A igneous rock erosion coal spontaneous combustion risk assessment system employing a igneous rock erosion coal spontaneous combustion risk assessment method according to any one of claims 1 to 7, comprising: the data receiving module is used for receiving microstructure parameter data of the raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal and microcrystalline structure parameter data of the raw coal and igneous rock erosion coal; the microstructure parameter data of the raw coal and igneous rock erosion coal comprise porosity, average pore perimeter, pore area and average pore area, the functional group content data of the raw coal and igneous rock erosion coal comprise aromatic hydrocarbon content, oxygen-containing functional group content, aliphatic hydrocarbon content and hydroxyl content, and the microcrystalline structure parameter data of the raw coal and igneous rock erosion coal comprise aromatic layer spacing, effective stacking height, extensibility, aromaticity and average crystal stacking layer number; The spontaneous combustion risk evaluation module is used for receiving the preset characteristic temperature points, inputting microstructure parameter data of the raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal, microcrystalline structure parameter data of the raw coal and igneous rock erosion coal and the characteristic temperature points into a preset spontaneous combustion heat-resistant characteristic model of the coal, and outputting and obtaining spontaneous combustion risk evaluation results of the igneous rock erosion coal relative to the raw coal.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, characterized in that the memory stores the computer program capable of running on the processor, and that the processor, when loading and executing the computer program, employs a igneous rock erosion coal spontaneous combustion risk assessment method according to any one of claims 1 to 7.
10. A computer readable storage medium having a computer program stored therein, wherein the computer program, when loaded and executed by a processor, employs a igneous rock erosion coal spontaneous combustion risk assessment method according to any one of claims 1 to 7.

Description

Igneous rock erosion coal spontaneous combustion risk assessment method and system Technical Field The invention relates to the technical field of risk assessment, in particular to a spontaneous combustion risk assessment method and system for igneous rock erosion coal. Background Aiming at the disaster prevention and control requirement of igneous rock erosion coal beds, students at home and abroad have developed systematic researches. In the aspect of component evolution, the prior research finds that the erosion effect of igneous rock has a larger influence on the element composition, mineral type and content in coal, so that the sulfur and carbon content in the coal is increased, the hydrogen and nitrogen content is reduced, and the content of part of rare earth elements and minerals is increased. The prior art has found that minerals produced in coal under the action of igneous rock heat mainly include pyrite, calcite and dolomite, and appear as crushed pieces or capsule fillers in spoiled coal. The prior researches find that the moisture and volatile content of igneous rock erosion coal is reduced and the ash content is increased. In terms of structural characterization, the prior art finds that the fracture network of igneous rock erosion coal is developed through pore analysis, and the specific surface area and pore connectivity are remarkably improved. In the prior art, the low-temperature oxidation experiment shows that the temperature of the crossing point of the eroded coal is advanced, and the oxygen consumption rate and the heat release intensity are obviously enhanced. The invasion of igneous rock is found to improve the deterioration degree of coal, increase the number of micropores and macropores in coal and improve the contact capability of oxygen and coal body in the low-temperature oxidation process. The influence of the invasion of the magma on the low-temperature oxidation heat effect of the coal in the prior art can obtain the coal body which is closer to the magma invasion body, the stronger the oxidation heat release capacity is, and the shorter the natural ignition period is. The above results show that spontaneous combustion of igneous rock erosion coal is a complex process of multiple causative couplings, and therefore, the effect of igneous rock erosion needs to be evaluated for the risk of spontaneous combustion of coal. Disclosure of Invention In order to solve the defects in the background art, the invention aims to provide a method and a system for evaluating spontaneous combustion risk of igneous rock erosion coal. In a first aspect, the invention provides a igneous rock erosion coal spontaneous combustion risk assessment method, which comprises the following steps: receiving microstructure parameter data of raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal and microcrystalline structure parameter data of the raw coal and igneous rock erosion coal; the microstructure parameter data of the raw coal and igneous rock erosion coal comprise porosity, average pore perimeter, pore area and average pore area, the functional group content data of the raw coal and igneous rock erosion coal comprise aromatic hydrocarbon content, oxygen-containing functional group content, aliphatic hydrocarbon content and hydroxyl content, and the microcrystalline structure parameter data of the raw coal and igneous rock erosion coal comprise aromatic layer spacing, effective stacking height, extensibility, aromaticity and average crystal stacking layer number; Receiving a predetermined characteristic temperature point, inputting microstructure parameter data of raw coal and igneous rock erosion coal, functional group content data of the raw coal and igneous rock erosion coal, microcrystalline structure parameter data of the raw coal and igneous rock erosion coal and the characteristic temperature point into a pre-established spontaneous combustion and heat prevention characteristic model of the coal, and outputting to obtain a spontaneous combustion risk assessment result of the igneous rock erosion coal relative to the raw coal. With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes a calculation formula of the fragrance layer interval, the effective stacking height and the extensibility, wherein the calculation formula is as follows: (1) (2) (3) Wherein lambda is the wavelength of X-ray, theta 002、θ100 is the diffraction angle corresponding to 002, 100 diffraction peak, beta 002、β100 is the half-width of 002, 100 diffraction peak, K 1、K2 is the Shelle constant; The calculation formula of the aromaticity f a is as follows: (4) wherein A002 and Agamma are the peak areas of 002 and gamma peaks; the average crystal stacking layer number N ave of the coal represents the stacking degree of the microcrystalline structure unit, and the calculation formula is as follows: (5) The