Coal underground mining carbon emission calculation method, device, equipment, medium and product

Abstract

The application discloses a coal underground mining carbon emission calculation method, device, equipment, medium and product, relates to the field of carbon emission, and the method comprises the following steps: obtaining the original gas content, residual gas content and residual gas content of a target coal seam through a sensor; in the case of setting a coal pillar and not setting a coal pillar, respectively obtaining the total volume of methane emission according to the original gas content, residual gas content and residual gas content of the target coal seam, and obtaining the carbon emission intensity under different methane emission modes in the case of setting a coal pillar and not setting a coal pillar according to the methane emission mode and the total volume of methane emission. The application can improve the accuracy of carbon emission results.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of carbon emissions, and particularly relates to a coal underground mining carbon emission calculation method, device, equipment, medium and product. BACKGROUND

[0002] The current "Enterprise Greenhouse Gas Emission Calculation Method and Reporting Guide" still has a vague area in defining the emission boundary of specific mines. The methane emission calculation only uses a unified emission factor based on the ownership type of coal mines (state-owned, local and township coal mines), without considering gas extraction utilization and without distinguishing specific emission links, which limits the accuracy of carbon emission calculation results, and leads to insignificant management effect after management according to the reduction strategy based on the calculation results. SUMMARY

[0003] The purpose of the present application is to provide a coal underground mining carbon emission calculation method, device, equipment, medium and product, which can improve the accuracy of carbon emission results.

[0004] To achieve the above purpose, the present application provides the following solutions: In a first aspect, the present application provides a coal underground mining carbon emission calculation method, comprising: obtaining the original gas content, residual gas content and residual gas content of a target coal seam through a sensor.

[0005] If a coal pillar is left during the coal mining process of the target coal seam, the methane emission volume under the coal pillar left condition is obtained based on the original gas content, residual gas content and residual gas content of the target coal seam; the methane emission volume under the coal pillar left condition includes the methane emission volume of the coal pillar extraction link, the methane emission volume of the coal extraction extraction link and the methane emission volume of the coal extraction air exhaust link.

[0006] Based on the methane emission volume under the coal pillar left condition, the total methane emission volume in the coal mining process under the coal pillar left condition is obtained.

[0007] Based on the total methane emission volume in the coal mining process under the coal pillar left condition and the methane emission mode during the coal mining process of the target coal seam, the carbon emission intensity under the coal pillar left condition is obtained.

[0008] If no coal pillar is left during the coal mining process of the target coal seam, the methane emission volume under the coal pillar left condition is obtained based on the original gas content, residual gas content and residual gas content of the target coal seam; the methane emission volume under the coal pillar left condition includes the methane emission volume of the extraction link under the coal pillar left condition and the methane emission volume of the air exhaust link.

[0009] Based on the methane emission volume under the coal pillar left condition, the total methane emission volume in the coal mining process under the coal pillar left condition is obtained.

[0010] Based on the total volume of methane emission in the coal mining process without setting coal pillars and the methane emission mode in the target coal seam mining process, the carbon emission intensity without setting coal pillars is obtained.

[0011] In a second aspect, the present application provides a coal underground mining carbon emission calculation device, comprising: a data acquisition module for acquiring the original gas content, residual gas content and residual gas content of the target coal seam through a sensor.

[0012] The volume determination module under the condition of setting coal pillars is used to obtain the methane emission volume under the condition of setting coal pillars based on the original gas content, residual gas content and residual gas content of the target coal seam if coal pillars are set during the target coal seam mining process. The methane emission volume under the condition of setting coal pillars includes the methane emission volume of the coal pillar extraction link, the methane emission volume of the coal extraction extraction link and the methane emission volume of the coal extraction air exhaust link.

[0013] The total volume determination module under the condition of setting coal pillars is used to obtain the total volume of methane emission in the coal mining process under the condition of setting coal pillars based on the methane emission volume under the condition of setting coal pillars.

[0014] The carbon emission intensity determination module under the condition of setting coal pillars is used to obtain the carbon emission intensity under the condition of setting coal pillars based on the total volume of methane emission in the coal mining process under the condition of setting coal pillars and the methane emission mode in the target coal seam mining process.

[0015] The volume determination module under the condition of not setting coal pillars is used to obtain the methane emission volume under the condition of not setting coal pillars based on the original gas content, residual gas content and residual gas content of the target coal seam if no coal pillars are set during the target coal seam mining process. The methane emission volume under the condition of not setting coal pillars includes the methane emission volume of the extraction link under the condition of not setting coal pillars and the methane emission volume of the air exhaust link.

[0016] The total volume determination module under the condition of not setting coal pillars is used to obtain the total volume of methane emission in the coal mining process under the condition of not setting coal pillars based on the methane emission volume under the condition of not setting coal pillars.

[0017] The carbon emission intensity determination module under the condition of not setting coal pillars is used to obtain the carbon emission intensity under the condition of not setting coal pillars based on the total volume of methane emission in the coal mining process under the condition of not setting coal pillars and the methane emission mode in the target coal seam mining process.

[0018] In a third aspect, the present application provides a computer device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to realize the above-mentioned coal underground mining carbon emission calculation method.

[0019] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the coal underground mining carbon emission calculation method.

[0020] In a fifth aspect, the present application provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the coal underground mining carbon emission calculation method.

[0021] According to the specific embodiments provided in the present application, the present application has the following technical effects: the present application provides a coal underground mining carbon emission calculation method, device, equipment, medium and product, which considers whether to set a coal pillar in the coal mining process, and based on the original gas content, residual gas content and residual gas content, the methane emission volume of the extraction link and the air exhaust link is obtained, and then the methane emission volume under the condition of setting a coal pillar and the methane emission volume under the condition of not setting a coal pillar are obtained, and the carbon emission intensity is obtained based on the methane emission volume under the condition of setting a coal pillar or the methane emission volume under the condition of not setting a coal pillar and the methane emission mode, which improves the accuracy of the carbon emission result. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 It is a schematic diagram of a coal seam.

[0024] Figure 2 It is a schematic diagram of the range of the coal seam.

[0025] Figure 3 It is a flowchart of a coal underground mining carbon emission calculation method provided by another embodiment of the present application.

[0026] Figure 4 It is a structural schematic diagram of a computer device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] The above objects, features and advantages of the present application will become more apparent from the following detailed description of the application when taken in conjunction with the accompanying drawings and specific embodiments.

[0029] The methane emission is divided into three main links: the treatment and extraction link, the air exhaust link and the emission link. The methane emission in the emission link is less and decreases over time, and thus is not considered in the overall process. Based on this, in an exemplary embodiment, as shown in Figure 3 A coal underground mining carbon emission calculation method is provided, including the following steps.

[0030] Step 201: Obtain the original gas content, residual gas content and residual gas content of the target coal seam through a sensor.

[0031] Step 202: If a coal pillar is left during the coal mining process of the target coal seam, obtain the methane emission volume under the coal pillar left condition based on the original gas content, residual gas content and residual gas content of the target coal seam; the methane emission volume under the coal pillar left condition includes the methane emission volume of the coal pillar extraction link, the methane emission volume of the coal extraction link and the methane emission volume of the coal extraction air exhaust link.

[0032] Step 203: Obtain the total methane emission volume in the coal mining process under the coal pillar left condition based on the methane emission volume under the coal pillar left condition.

[0033] Step 204: Obtain the carbon emission intensity under the coal pillar left condition based on the total methane emission volume in the coal mining process under the coal pillar left condition and the methane emission mode during the coal mining process of the target coal seam.

[0034] Step 205: If no coal pillar is left during the coal mining process of the target coal seam, obtain the methane emission volume under the coal pillar left condition based on the original gas content, residual gas content and residual gas content of the target coal seam; the methane emission volume under the coal pillar left condition includes the methane emission volume of the extraction link under the coal pillar left condition and the methane emission volume of the air exhaust link.

[0035] Step 206: Obtain the total methane emission volume in the coal mining process under the coal pillar left condition based on the methane emission volume under the coal pillar left condition.

[0036] Step 207: Obtain the carbon emission intensity under the coal pillar left condition based on the total methane emission volume in the coal mining process under the coal pillar left condition and the methane emission mode during the coal mining process of the target coal seam.

[0037] In actual application, before step 202, it further includes determining the calculation range according to the strike length, tendency length and coal seam thickness of the target coal seam.

[0038] The methane emission volume of the extraction link is obtained by subtracting the residual gas content from the original gas content and multiplying the coal quantity that has experienced the extraction stage; the methane emission volume of the air blowing link is obtained by subtracting the residual gas content from the residual gas content and multiplying the coal quantity that has experienced the air blowing stage, so in actual application, step 202 specifically comprises: obtaining the methane emission volume of the coal extraction link under the condition of the coal pillar based on the original gas content, the residual gas content and the mass of the extracted coal.

[0039] The methane emission volume of the air blowing link under the condition of the coal pillar is obtained based on the residual gas content, the residual gas content and the mass of the extracted coal.

[0040] The methane emission volume of the coal pillar extraction link under the condition of the coal pillar is obtained based on the original gas content, the residual gas content and the mass of the coal in the coal pillar.

[0041] In actual application, step 203 specifically comprises: the methane emission volume of the extracted coal under the condition of the coal pillar is composed of two links of extraction and air blowing, so the sum of the methane emission volume of the coal extraction link and the methane emission volume of the air blowing link of the extracted coal is obtained to obtain the methane emission volume of the extracted coal under the condition of the coal pillar.

[0042] The methane emission volume of the coal pillar under the condition of the coal pillar only considers the extraction link, so the methane emission volume of the coal pillar extraction link under the condition of the coal pillar is determined as the methane emission volume of the coal pillar under the condition of the coal pillar.

[0043] The sum of the methane emission volume of the extracted coal under the condition of the coal pillar and the methane emission volume of the coal pillar under the condition of the coal pillar is obtained to obtain the total methane emission volume in the coal mining process under the condition of the coal pillar.

[0044] In actual application, step 204 specifically comprises: if the methane emission mode in the coal mining process of the target coal seam is direct emission to the atmosphere, then the carbon emission intensity under the condition of the coal pillar is obtained based on the total methane emission volume in the coal mining process under the condition of the coal pillar.

[0045] If the methane emission mode in the coal mining process of the target coal seam is combustion utilization, then the carbon emission intensity under the condition of the coal pillar is obtained based on the combustion efficiency in the process of generating carbon dioxide by burning methane and the total methane emission volume in the coal mining process under the condition of the coal pillar.

[0046] The methane emission volumes of the extraction link and the air blowing link when directly emitted to the atmosphere are respectively converted into carbon dioxide equivalent, so in actual application, the carbon emission intensity under the condition of the coal pillar is obtained based on the total methane emission volume in the coal mining process under the condition of the coal pillar, specifically comprising: obtaining the mass of the emitted methane under the condition of the coal pillar based on the total methane emission volume in the coal mining process under the condition of the coal pillar.

[0047] Based on the quality of the discharged methane under the condition of leaving the coal pillar, the carbon emission amount of carbon dioxide equivalent under the condition of leaving the coal pillar is obtained.

[0048] Based on the carbon emission amount of carbon dioxide equivalent under the condition of leaving the coal pillar, the carbon emission intensity under the condition of leaving the coal pillar is obtained.

[0049] In actual application, step 205, specifically includes: based on the original gas content, residual gas content and the quality of the recoverable coal of the target coal seam, the methane emission volume of the extraction link under the condition of not leaving the coal pillar is obtained.

[0050] Based on the quality of the discharged methane under the condition of leaving the coal pillar and the combustion efficiency in the process of methane combustion to generate carbon dioxide, the carbon emission amount of carbon dioxide equivalent under the condition of leaving the coal pillar is obtained.

[0051] Based on the carbon emission amount of carbon dioxide equivalent under the condition of leaving the coal pillar, the carbon emission intensity under the condition of leaving the coal pillar is obtained.

[0052] In actual application, step 205, specifically includes: based on the original gas content, residual gas content and the quality of the recoverable coal of the target coal seam, the methane emission volume of the extraction link under the condition of not leaving the coal pillar is obtained.

[0053] Based on the residual gas content, residual gas content and the quality of the recoverable coal of the target coal seam, the methane emission volume of the ventilation link under the condition of not leaving the coal pillar is obtained.

[0054] Under the condition of not leaving the coal pillar, the recoverable coal is all transported to the ground, and the methane emission volume is composed of the extraction link and the ventilation link, so in actual application, based on the methane emission volume under the condition of not leaving the coal pillar, the total methane emission volume in the process of coal mining under the condition of not leaving the coal pillar is obtained, specifically: the sum of the methane emission volume of the extraction link and the methane emission volume of the ventilation link is calculated to obtain the total methane emission volume in the process of coal mining under the condition of not leaving the coal pillar.

[0055] In actual application, step 207, specifically includes: if the methane emission mode in the process of coal mining of the target coal seam is direct emission to the atmosphere, then based on the total methane emission volume in the process of coal mining under the condition of not leaving the coal pillar, the carbon emission intensity under the condition of not leaving the coal pillar is obtained.

[0056] If the methane emission mode in the coal seam mining process is combustion utilization, the carbon emission intensity without coal pillar is obtained based on the combustion efficiency in the process of methane combustion to generate carbon dioxide and the total volume of methane emission in the coal mining process without coal pillar.

[0057] In practical application, the carbon emission intensity without coal pillar is obtained based on the total volume of methane emission in the coal mining process without coal pillar, specifically: the mass of emitted methane without coal pillar is obtained based on the total volume of methane emission in the coal mining process without coal pillar.

[0058] The carbon emission amount carbon dioxide equivalent without coal pillar is obtained based on the mass of emitted methane without coal pillar.

[0059] The carbon emission intensity without coal pillar is obtained based on the carbon emission amount carbon dioxide equivalent without coal pillar.

[0060] In practical application, the carbon emission intensity without coal pillar is obtained based on the combustion efficiency in the process of methane combustion to generate carbon dioxide and the total volume of methane emission in the coal mining process without coal pillar, specifically: the mass of emitted methane without coal pillar is obtained based on the total volume of methane emission in the coal mining process without coal pillar.

[0061] The carbon emission amount carbon dioxide equivalent without coal pillar is obtained based on the mass of emitted methane without coal pillar and the combustion efficiency in the process of methane combustion to generate carbon dioxide.

[0062] The carbon emission intensity without coal pillar is obtained based on the carbon emission amount carbon dioxide equivalent without coal pillar.

[0063] The application also provides a more specific embodiment to introduce the above-mentioned coal underground mining carbon emission calculation method, and the specific steps include steps one to four.

[0064] Step one: define the calculation range.

[0065] The gas (CH4) prevention and control technology generally includes ventilation management, gas drainage technology and gas control, etc. These conventional technologies generally only affect a single coal seam, such as Figure 1As shown, gas control technologies, such as protective layer technology, can affect the emission of methane from adjacent coal seams. When mining a particular coal seam, adjacent seams are affected by mining activities. These activities create fractures in the adjacent seams, causing methane to escape into the mined seam, thus increasing the methane content. However, for the entire mine, the total methane amount (extraction + ventilation + residual amount) remains constant; only the timing of methane emission is advanced. For unminable coal seams, some methane will escape into other minable seams. This portion of escaped methane accounts for a small proportion of the total and is not considered here. Therefore, when calculating the methane emission volume of a specific working face in a mine, only the methane emission from that specific coal seam is considered.

[0066] To calculate the methane extraction rate of this coal seam, the extraction range, i.e., the calculation range, must first be determined. When extracting gas from this coal seam, surrounding coal seams or rock strata will also be extracted; based on the above theory, these do not need to be considered in the calculation. Figure 2 The amount of methane emitted in this way, spreading outwards, is only calculated for the coal body of this coal seam. Figure 2 The methane content (in the slashed section). Assuming the target coal seam to be mined is cubic, such as... Figure 2 As shown, its strike length is W, its dip length is L, and its coal seam thickness is H. The range of methane is the range for calculating the coal body volume of this coal seam.

[0067] Step 2: Divide the emission links based on the calculation scope in Step 1.

[0068] This application divides the methane emission stage into treatment and extraction, ventilation and exhaust, and fugitive emission. Some scholars have conducted fugitive emission analysis on this part of the methane emission and found that the amount of methane emitted in this part is very small and decreases with the extension of exposure time, so it is not considered in the calculation of this application.

[0069] Since engineering examples may involve the retention of coal pillars, this application divides the recoverable coal quantity into the coal output and the coal pillar quantity. The coal output undergoes two stages: extraction and ventilation, while the coal pillar quantity only undergoes the extraction stage. Although the surface coal of the coal pillar undergoes desorption and release, this portion is small and will not be considered here.

[0070] The residual gas content and the remaining gas content can be measured by actual measurement method, or calculated according to formula (1) and formula (2).

[0071] Formula for calculating residual gas content: (1).

[0072] Formula for calculating residual gas (non-desorbable): (2).

[0073] In the formula: WCY is the residual gas content, m 3 / t ; W CC is the residual gas content, the amount of gas in the coal that cannot be desorbed at standard atmospheric pressure, m 3 / t ;P CY is the residual relative gas pressure of the coal seam, Mpa ; is the standard atmospheric pressure, 0.101325 Mpa ; is the limit adsorption amount of the coal at the test temperature, m 3 / t ; b is a constant depending on the temperature and the gas adsorption performance of the coal, MPa -1 ; A d is the ash content of the coal, %; M ad is the moisture content of the coal, %; π is the porosity of the coal, %; is the bulk density of the coal, t / m3 m 3 .

[0074] Step three: calculate the methane emission volume based on the emission link in step two.

[0075] In the case of setting up coal pillars, in coal mining, setting up coal pillars during the mining process is a common protection method for protecting roadways from collapse, such as the 121 method. Generally, the coal pillar accounts for 7% to 15% of the delineated reserves, and the present application takes an average value nearby for convenience, assuming that the amount of coal left for setting up coal pillars is 10% of the recoverable coal amount, and the coal seam to be mined is shown in FIG. 1, the position where the coal pillar needs to be set up is at both ends of the strike, and the set-up coal pillar is a certain distance, and the set-up coal amount is taken as 10% of the recoverable coal amount in this calculation, so the amount of coal mined under this method Figure 2 is shown in FIG. 1, the position where the coal pillar needs to be set up is at both ends of the strike, and the set-up coal pillar is a certain distance, and the set-up coal amount is taken as 10% of the recoverable coal amount in this calculation, so the amount of coal mined under this method is represented by formula (3).

[0076] (3).

[0077] (4).

[0078] (5).

[0079] In the formula: is the recoverable coal amount under the condition of setting up coal pillars, m 3 ; is the amount of coal left for setting up coal pillars, m 3; is the volume of the coal amount, m 3 .

[0080] Under this method, the recoverable coal amount can be divided into two parts: the first is the coal amount of the coal mining part, which goes through the stages of extraction and air exhaust, so the methane emission volume of the extraction and air exhaust stages needs to be considered in the calculation; the second is the coal pillar part, which only needs to calculate the emission in the extraction stage. Since the residual gas content is required to be below 8 m 3 / t, combined with actual production, the residual gas content here is taken as 7.5 m 3 / t. The methane emission volume is divided into two blocks for calculation.

[0081] ① Coal mining part.

[0082] The methane emission volume of the coal amount under the condition of setting coal pillars is the amount of methane extracted before mining and the amount of methane that escapes into the roadway or air during the mining process, in addition to the methane that cannot be desorbed in the coal, which belongs to the methane amount that is separated from the coal body in the stages of extraction and air exhaust. The calculation process is as follows.

[0083] (6).

[0084] (7).

[0085] (8).

[0086] (9).

[0087] In the formula: is the methane emission volume of the coal amount under the condition of setting coal pillars ，m 3 ; is the mass of the coal mining, t ; is the density of the coal, kg / m 3 ; W is the original gas content, m 3 / t ; W CY is the residual gas content, taken as 7.5, m 3 / t ; W CC is the residual gas content, calculated according to formula (2), m 3 / t ; The methane emission volume of the coal extraction link, m 3 ; The methane emission volume of the coal extraction link, m 3 .

[0088] 2. The coal pillar part.

[0089] The coal pillar is left in the underground to protect the roadway, and is not transported to the ground. Therefore, when calculating the methane emission volume of the coal pillar, only the amount of methane extracted in the extraction process is considered. The calculation process is as follows.

[0090] (10).

[0091] (11).

[0092] In the formula, is the methane emission volume of the coal pillar under the condition of leaving the coal pillar, that is, the methane emission volume of the coal pillar extraction link, m 3 ; is the mass of the coal in the coal pillar part, t ; is the density of the coal, kg / m3 m 3 .

[0093] Under the condition of not leaving the coal pillar, with the increasing maturity of the coal mining technology, several coal mining methods without leaving the coal pillar have been derived, such as the 110 / N00 method. The coal mining method without leaving the coal pillar can not only weaken the stress concentration in the safety aspect, but also improve the coal resource recovery rate in the economic aspect. Therefore, in the engineering practice, many coal mines also use the coal mining method without leaving the coal pillar. Under the condition of not leaving the coal pillar, it can be considered that all the extractable coal is transported to the ground, and the methane emission is except for the methane that cannot be desorbed remaining in the coal body. The rest of the methane is separated from the coal body in the extraction and air exhaust links. Therefore, when calculating, the calculation is divided into two links of extraction and air exhaust, and the calculation process is as follows.

[0094] (12).

[0095] (13).

[0096] (14).

[0097] In the formula, is the extractable coal mass under the condition of not leaving the coal pillar ，m 3 ; is the mass of the extractable coal under the condition of not leaving the coal pillar, t ; ρc is the density of coal, kg / m3 m 3 ; ρc is the density of coal, kg / m3 m 3 ; W CC ρc is the density of coal, kg / m3 m 3 / t .

[0098] Without coal pillar, it can be generally considered that the coal seam in the planning area is all mined out and transported to the ground. In this process, methane emission passes through both extraction and air emission. Therefore, the amount of gas emission is calculated by subtracting the residual gas content from the original gas content. The methane emission volume in the extraction and air emission parts is represented by Vm. The methane emission volume in these two parts can be calculated as follows.

[0099] (15).

[0100] (16).

[0101] In the formula: ρc is the density of coal, kg / m3 t ; ρc is the density of coal, kg / m3 m 3 ; ρc is the density of coal, kg / m3 m 3 .

[0102] Step four: Calculate the carbon emission intensity based on the methane emission volume in step three.

[0103] Carbon emission intensity generally refers to the carbon dioxide emission per unit of GDP. Through carbon emission intensity, carbon reduction strategies can be implemented for specific links. In this application, it refers to the carbon dioxide equivalent emission per ton of coal.

[0104] In the early stage, the gas extraction technology was not mature enough, resulting in poor extraction effect and low methane concentration. There was also a lack of efficient utilization methods, which led to the direct discharge of coal mine gas to the atmosphere. The calculation in this application is based on two different aspects of direct discharge to the atmosphere and combustion utilization. The calculation process is as follows.

[0105] 1) Direct discharge to the atmosphere.

[0106] (17).

[0107] (18).

[0108] (19).

[0109] wherein: is the total volume of methane emission during the coal mining process, is the mass of emitted methane, t ; is the density of methane, taken as 0.667, kg / m 3 ; is the carbon emission amount in terms of carbon dioxide equivalent, t; 29.8 is the global warming potential multiplier of methane relative to carbon dioxide at a 100-year scale; CI is the carbon emission intensity, ; is the coal output (raw coal production), t , which is the mass of coal output in the case of setting coal pillars, and which is the mass of mineable coal in the case of not setting coal pillars.

[0110] 2) Combustion utilization.

[0111] In the process of methane combustion power generation, only the stage of methane combustion to generate carbon dioxide (CO2) in the combustion chamber is considered, the subsequent steam turbine and generator processes are ignored, and the combustion efficiency is set to 95%. The reaction equation of methane combustion is as follows.

[0112] (20).

[0113] According to the reaction equation, 1 mol of methane reacts to generate 1 mol of CO2, and thus the mass of CO2 is calculated as follows.

[0114] (21).

[0115] (22).

[0116] (23).

[0117] wherein: is the total volume of methane emission during the coal mining process, is the mass of emitted methane, t ; is the density of methane, taken as 0.667, kg / m 3 ; is the combustion efficiency in the process of methane combustion to generate CO2, taken as 95%; is the carbon emission amount in terms of carbon dioxide equivalent, t.

[0118] In the present application, the carbon emission intensity is the carbon emission amount per ton of coal (i.e., the carbon emission amount carbon dioxide equivalent per ton of coal), which is calculated by the following formula.

[0119] (24).

[0120] In the formula: CI is the carbon emission intensity, ; is the carbon emission amount carbon dioxide equivalent, t .

[0121] The present application also provides an embodiment of calculating and comparing a 32-2# coal seam of a H coal mine (a coal and gas outburst mine) in a certain area by using the coal underground mining carbon emission calculation method provided by the present application and the national methane emission factor method.

[0122] The 32-2# coal seam of the H coal mine belongs to a coal seam that needs to be left with a coal pillar, the recoverable coal amount of the coal seam is 432.87681 million tons, which is rounded to 432.877 million tons in the calculation process, the coal amount left with a coal pillar is 24.4 million tons, and the mass of the coal out is 408.477 million tons. The original gas content of the coal seam is 16.95 m³ / t, the residual gas content is 5.0837 m³ / t, and the residual gas content is 2.1535 m³ / t.

[0123] The calculation process of the coal underground mining carbon emission calculation method provided by the present application is as follows (taking three decimal places).

[0124] 1. Total methane emission volume.

[0125] 1) Methane emission volume of coal out.

[0126] For the calculation of the methane emission volume of the coal out, the total methane emission volume of the coal out part is calculated to be 60,440,271.192 m 3 by using formula (6)~formula (9) in combination with the above data, wherein the methane emission volume of the extraction link is 48,471,083.705 m 3 , and the methane emission volume of the air exhaust link is 11,969,187.487 m 3 .

[0127] 2) Methane emission volume of coal left with a coal pillar.

[0128] The methane emission of the coal left with a coal pillar only passes through the extraction link, so the methane emission volume of the coal left with a coal pillar is calculated to be 2,895,377.2 m 3 by using formula (10)~formula (11) in combination with the above data.

[0129] In summary, the total volume of methane emission in H coal mine in a certain area is 63,335,648.392m 3 . Among them, the volume of methane emission in the extraction link is 51,366,460.905m 3 , and the volume of methane emission in the air exhaust link is 11,969,187.487m 3 .

[0130] 2. Carbon emission intensity.

[0131] 1) Directly discharged into the atmosphere.

[0132] The carbon emission intensity of H coal mine in a certain area is calculated according to formula (17)~formula (19) by substituting the above data, and the carbon emission amount of carbon dioxide equivalent is 1,258,897.335tCO2e, among which the carbon emission amount of carbon dioxide equivalent in the extraction link is 1,020,990.584tCO2e, accounting for 81.10%, and the carbon emission amount of carbon dioxide equivalent in the air exhaust link is 237,906.750tCO2e, accounting for 18.90%. The carbon emission intensity is 0.308tCO2e / t.

[0133] 2) Combustion utilization.

[0134] Assuming that all the methane discharged in the extraction link is used for combustion utilization, according to formula (20)~formula (24), by substituting the above data, it is calculated that the total emission of H mine is 327,414.736tCO2e, among which the carbon emission amount in the extraction link is 89,507.984tCO2e, accounting for 27.34%, and the carbon emission amount in the air exhaust link is 237,906.752tCO2e, accounting for 72.66%. The carbon emission intensity is 0.080tCO2e / t.

[0135] H mine belongs to a high-gas mine, and the methane emission factor is 11.35m 3 / t. Combined with the recoverable coal amount of 4,328,770 tons, the methane emission factor method is used to calculate that the discharged methane mass is 32770.737 tons, and the carbon emission intensity is 0.226tCO2e / t.

[0136] Compared with the carbon emission calculation result calculated by the methane emission factor method, the carbon emission calculation result obtained by the present application is more accurate.

[0137] The present application calculates the carbon emissions of different links in the whole process of underground coal mining, and constructs a more detailed carbon emission calculation model to achieve the following goals: 1. Different emission links in the mining process are refined, and the proportion of carbon emissions in different links is reflected to find the main emission source, so as to give targeted emission reduction strategies. 2. Compare the carbon emissions before and after emission control, analyze the emission reduction effect, and find the suitable emission reduction means for the mine.

[0138] Based on the same inventive concept, the embodiments of the present application also provide a coal underground mining carbon emission calculation device for implementing the coal underground mining carbon emission calculation method described above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more coal underground mining carbon emission calculation device embodiments provided below can be referred to the limitations of the coal underground mining carbon emission calculation method in the above, which will not be repeated here.

[0139] In one exemplary embodiment, a coal underground mining carbon emission calculation device is provided, comprising: a data acquisition module for acquiring the original gas content, residual gas content and residual gas content of the target coal seam through a sensor.

[0140] A volume determination module under the condition of setting coal pillars is configured to obtain a methane emission volume under the condition of setting coal pillars according to the original gas content, residual gas content and residual gas content of the target coal seam if coal pillars are set during the target coal seam mining process. The methane emission volume under the condition of setting coal pillars includes: a methane emission volume of the coal pillar extraction link, a methane emission volume of the coal extraction extraction link and a methane emission volume of the coal extraction air exhaust link.

[0141] A total volume determination module under the condition of setting coal pillars is configured to obtain a total methane emission volume during the coal mining process under the condition of setting coal pillars based on the methane emission volume under the condition of setting coal pillars.

[0142] A carbon emission intensity determination module under the condition of setting coal pillars is configured to obtain a carbon emission intensity under the condition of setting coal pillars based on the total methane emission volume during the coal mining process under the condition of setting coal pillars and the methane emission mode during the target coal seam mining process.

[0143] A volume determination module under the condition of not setting coal pillars is configured to obtain a methane emission volume under the condition of not setting coal pillars according to the original gas content, residual gas content and residual gas content of the target coal seam if no coal pillars are set during the target coal seam mining process. The methane emission volume under the condition of not setting coal pillars includes a methane emission volume of the extraction link under the condition of not setting coal pillars and a methane emission volume of the air exhaust link.

[0144] The total volume determination module under the condition of no coal pillar is configured to obtain the total methane emission volume in the coal mining process under the condition of no coal pillar according to the methane emission volume under the condition of no coal pillar.

[0145] The carbon emission intensity determination module under the condition of no coal pillar is configured to obtain the carbon emission intensity under the condition of no coal pillar according to the total methane emission volume in the coal mining process under the condition of no coal pillar and the methane emission mode in the coal mining process of the target coal seam.

[0146] In an exemplary embodiment, a computer device, which can be a server or a terminal, is provided, and an internal structure diagram of the computer device can be as shown in FIG. 1. Figure 4 The computer device includes a processor, a memory, an input / output interface (I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for running the operating system and the computer program in the non-volatile storage medium. The database of the computer device is configured to store coal underground mining carbon emission calculation data. The input / output interface of the computer device is configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to communicate with external terminals through network connection. The computer program is executed by the processor to implement a video tag processing coal underground mining carbon emission calculation method.

[0147] In an exemplary embodiment, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the above-mentioned method embodiments.

[0148] In an exemplary embodiment, a computer program product is provided, which includes a computer program. The computer program is executed by a processor to implement the above-mentioned method embodiments.

[0149] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0150] The principles and implementation manners of the present application are described herein by using specific examples, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will have changes. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method for calculating carbon emissions from underground coal mining, characterized in that, The method for calculating carbon emissions from underground coal mining includes: The original gas content, residual gas content, and remaining gas content of the target coal seam are obtained through sensors. If a coal pillar is left during the mining of the target coal seam, the methane emission volume under the condition of leaving the coal pillar is obtained based on the original gas content, residual gas content, and remaining gas content of the target coal seam. The methane emission volume under the condition of leaving the coal pillar includes: the methane emission volume during the coal pillar extraction stage, the methane emission volume during the coal extraction stage, and the methane emission volume during the coal ventilation stage. Specifically, according to the formula... Calculate the methane emission volume during coal extraction. According to the formula Calculate the methane emission volume in the coal ventilation process. According to the formula Calculate the methane emission volume during the coal pillar extraction process. ;in, Indicates the original gas content, Indicates the residual gas content. Indicates the residual gas content, Indicates the quality of the coal produced. Indicates the mass of the coal in the coal pillar; Based on the methane emission volume under the condition of retaining coal pillars, the total methane emission volume during the coal mining process under the condition of retaining coal pillars is obtained; Based on the total volume of methane emissions during coal mining with coal pillars and the methane emission method during the target coal seam mining process, the carbon emission intensity under the condition of coal pillars is obtained. If no coal pillar is left during the mining process of the target coal seam, the methane emission volume without leaving a coal pillar is obtained based on the original gas content, residual gas content and remaining gas content of the target coal seam; the methane emission volume without leaving a coal pillar includes the methane emission volume of the extraction stage and the methane emission volume of the ventilation stage without leaving a coal pillar. Based on the methane emission volume without coal pillars, the total methane emission volume during the coal mining process without coal pillars is obtained; Based on the total volume of methane emissions during coal mining without coal pillars and the methane emission patterns during the mining of the target coal seam, the carbon emission intensity under the condition of no coal pillars is obtained.

2. The method for calculating carbon emissions from underground coal mining according to claim 1, characterized in that, The methane emission volume under the condition of leaving a coal pillar is obtained based on the original gas content, residual gas content, and remaining gas content of the target coal seam. Specifically, it includes: Based on the original gas content, residual gas content and coal quality of the target coal seam, the methane emission volume of the coal extraction process under the condition of leaving coal pillars is obtained; Based on the residual gas content, remaining gas content and coal quality of the target coal seam, the methane emission volume of the coal exhaust process under the condition of leaving coal pillar is obtained. Based on the original gas content, residual gas content, and the quality of the coal in the coal pillar of the target coal seam, the methane emission volume of the coal pillar extraction process under the condition of leaving the coal pillar is obtained.

3. The method for calculating carbon emissions from underground coal mining according to claim 1, characterized in that, Based on the original gas content, residual gas content, and remaining gas content of the target coal seam, the methane emission volume without leaving a coal pillar is obtained, specifically including: Based on the original gas content, residual gas content and the quality of mineable coal in the target coal seam, the methane emission volume in the extraction process without leaving coal pillars is obtained. Based on the residual gas content, residual gas content, and quality of minable coal in the target coal seam, the methane emission volume of the ventilation process without leaving coal pillars is obtained.

4. The method for calculating carbon emissions from underground coal mining according to claim 1, characterized in that, Based on the total volume of methane emissions during coal mining with coal pillars and the methane emission patterns during target coal seam mining, the carbon emission intensity under the condition of coal pillars is obtained, specifically including: If the methane emission method during the target coal seam mining process is direct emission into the atmosphere, then the carbon emission intensity under the condition of leaving coal pillars is obtained based on the total volume of methane emission during the mining process. If the methane emission method during the target coal seam mining process is combustion utilization, then the carbon emission intensity under the condition of leaving coal pillars can be obtained based on the combustion efficiency of methane combustion to generate carbon dioxide and the total volume of methane emission during the mining process under the condition of leaving coal pillars.

5. The method for calculating carbon emissions from underground coal mining according to claim 1, characterized in that, Based on the total volume of methane emissions during coal mining without pillars and the methane emission patterns during target coal seam mining, the carbon emission intensity under the condition of no pillars is obtained, specifically including: If the methane emission method during the target coal seam mining process is direct emission into the atmosphere, then the carbon emission intensity without leaving coal pillars is obtained based on the total volume of methane emission during the mining process. If the methane emission method during the target coal seam mining process is combustion utilization, then the carbon emission intensity under the condition of not leaving coal pillars can be obtained based on the combustion efficiency of methane combustion to generate carbon dioxide and the total volume of methane emission during the mining process without leaving coal pillars.

6. The method for calculating carbon emissions from underground coal mining according to claim 1, characterized in that, If a coal pillar is left during the mining of the target coal seam, before calculating the methane emission volume under the condition of leaving the coal pillar based on the original gas content, residual gas content, and remaining gas content of the target coal seam, the following steps are also included: The calculation range is determined based on the strike length, dip length, and coal seam thickness of the target coal seam.

7. A carbon emission calculation device for underground coal mining, characterized in that, The carbon emission calculation device for underground coal mining includes: The data acquisition module is used to acquire the original gas content, residual gas content, and remaining gas content of the target coal seam through sensors; The module for determining the methane emission volume under the condition of leaving a coal pillar is used to determine the methane emission volume under the condition of leaving a coal pillar during the mining process of the target coal seam, based on the original gas content, residual gas content, and remaining gas content of the target coal seam. The methane emission volume under the condition of leaving a coal pillar includes: the methane emission volume during the coal pillar extraction stage, the methane emission volume during the coal extraction stage, and the methane emission volume during the coal extraction ventilation stage. Specifically, according to the formula... Calculate the methane emission volume during coal extraction. According to the formula Calculate the methane emission volume in the coal ventilation process. According to the formula Calculate the methane emission volume during the coal pillar extraction process. ;in, Indicates the original gas content, Indicates the residual gas content. Indicates the residual gas content, Indicates the quality of the coal produced. Indicates the mass of the coal in the coal pillar; The module for determining the total volume under the condition of retaining coal pillars is used to obtain the total volume of methane emissions during the coal mining process under the condition of retaining coal pillars, based on the methane emission volume under the condition of retaining coal pillars. The carbon emission intensity determination module under the condition of coal pillar retention is used to obtain the carbon emission intensity under the condition of coal pillar retention based on the total volume of methane emissions during the coal mining process under the condition of coal pillar retention and the methane emission mode during the coal mining process of the target coal seam. The volume determination module under no coal pillar condition is used to determine the methane emission volume under no coal pillar condition if no coal pillar is left during the target coal seam mining process. This is based on the original gas content, residual gas content, and remaining gas content of the target coal seam. The methane emission volume under no coal pillar condition includes the methane emission volume during the extraction stage and the methane emission volume during the ventilation stage. The module for determining the total volume without coal pillars is used to obtain the total methane emission volume during the coal mining process without coal pillars, based on the methane emission volume without coal pillars. The carbon emission intensity determination module under the condition of no coal pillar is used to obtain the carbon emission intensity under the condition of no coal pillar based on the total volume of methane emission during the coal mining process under the condition of no coal pillar and the methane emission mode during the target coal seam mining process.

8. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method for calculating carbon emissions from underground coal mining as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the method for calculating carbon emissions from underground coal mining as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the method for calculating carbon emissions from underground coal mining as described in any one of claims 1-6.

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