Coal underground gasification selected area evaluation method and device

Abstract

The invention provides a coal underground gasification selected area evaluation method and device, and belongs to the technical field of coal underground gasification, and the method comprises the steps: obtaining coal seam resource condition data and engineering geological condition data of a plurality of coal underground gasification selected areas to be evaluated; scoring the coal seam resource condition data and the engineering geological condition data for each underground coal gasification selection area to be evaluated; obtaining an evaluation queuing index according to the coal seam resource condition evaluation result and the engineering geological condition evaluation result; and determining the to-be-evaluated coal underground gasification selected areas corresponding to the first N evaluation queuing indexes as coal underground gasification selected areas suitable for carrying out coal underground gasification. The device comprises a data acquisition module, a scoring module, a weighted summation module, an index calculation module and a result sorting module. The method not only can scientifically and accurately evaluate the coal resource condition and the engineering geological condition of the favorable zone, but also can quantitatively queue the coal underground gasification selection zone to be evaluated.

Description

Technical Field

[0001] The present application belongs to the technical field of underground coal gasification, and relates to an underground coal gasification zone selection evaluation method and device. Background Art

[0002] Underground Coal Gasification (UCG) is an engineering process that uses controlled combustion of coal in coal-bearing strata underground to produce combustible synthesis gas such as methane, hydrogen, and carbon monoxide under the thermal and chemical effects of coal.

[0003] Geological evaluation and site selection are the key to the implementation of UCG. They are crucial to the construction and stable operation of the gasifier and determine whether the gasifier can safely, long-term and stably produce qualified raw coal gas. In the existing technology, based on the experience of shallow UCG field tests and indoor research results, the optimization criteria for UCG favorable areas have been proposed, including some evaluation systems and indicators. In addition, in order to avoid the risks of gas escape, groundwater pollution, surface subsidence, etc., and to make the gasification process stable and economical, the basic principles of geological evaluation are proposed from multiple perspectives such as coal reserves, coal seam conditions, and geological structures. The appropriate values ​​of indicators such as coal seam thickness, inclination, water content, gangue content, distance from faults, roof and floor permeability, and gas permeability are pointed out in detail, and the basic methods and requirements for modern UCG site selection decisions are pointed out. With the development of underground coal gasification technology, geological evaluation standards have gradually transitioned from qualitative to quantitative. In order to clarify the geological factors affecting underground coal gasification, some area evaluation methods and models construct a large and complex geological indicator evaluation system, which mainly includes seven categories: coal rock and coal quality conditions, coal seam occurrence conditions, surrounding rock conditions, geological structure conditions, hydrogeological conditions, environmental geological conditions and other conditions.

[0004] In summary, the underground coal gasification zone selection evaluation process in the prior art usually requires obtaining a large number of parameters, and the calculation process is also quite complicated, which brings many inconveniences to specific applications. Summary of the invention

[0005] Based on the above technical problems, the present application proposes a method and device for evaluating underground coal gasification zone selection.

[0006] In the first aspect, the present application proposes a method for evaluating underground coal gasification area selection, comprising:

[0007] Obtain coal seam resource condition data and engineering geological condition data for multiple underground coal gasification selection areas to be evaluated;

[0008] For each underground coal gasification area to be evaluated, the coal seam resource condition data and the engineering geological condition data are scored based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs;

[0009] The scoring result of the coal seam resource condition data is weighted and summed with the corresponding first preset weight to obtain the coal seam resource condition evaluation result; the evaluation result of the engineering geological condition data is weighted and summed with the corresponding second preset weight to obtain the engineering geological condition evaluation result;

[0010] According to the coal seam resource condition evaluation results and the engineering geological condition evaluation results, an evaluation queuing index is obtained;

[0011] The evaluation queuing indexes are sorted, the largest N evaluation queuing indexes are selected from the sorting results, and the underground coal gasification selection areas to be evaluated corresponding to the N evaluation queuing indexes are determined as the underground coal gasification selection areas suitable for carrying out underground coal gasification.

[0012] The coal seam resource condition data include: coal rank, coal seam thickness, volatile matter and ash content;

[0013] The engineering geological condition data include: coal seam burial depth, coal seam roof permeability, distance from coal seam roof aquifer, relative water inflow of coal seam, and structural geological conditions.

[0014] The levels include: first level, second level, third level and fourth level. The score range corresponding to the first level is: [1.0, 0.75], the score range corresponding to the second level is: (0.75, 0.5], the score range corresponding to the third level is: (0.5, 0.25], and the score range corresponding to the fourth level is: (0.25, 0].

[0015] Before scoring based on the coal rank, coal seam thickness, volatile matter and ash content, the method further includes: determining the coal rank, coal seam thickness, volatile matter and ash content;

[0016] The determination of the coal rank, coal seam thickness, volatile matter and ash content includes:

[0017] In the case of lignite and long bituminous coal, the rank of the coal is the first rank;

[0018] In the case of lean coal and gas coal, the coal rank is the second rank;

[0019] In the case of coal grades of fat coal and lean coal, the grade of coal grade is the third grade;

[0020] In case of anthracite and coking coal, the coal rank is the fourth rank;

[0021] When the coal seam thickness is greater than or equal to 5 meters and less than or equal to 15 meters, the grade of the coal seam thickness is the first grade;

[0022] When the coal seam thickness is greater than or equal to 2.5 meters and less than 5 meters, the grade of the coal seam thickness is the second grade;

[0023] When the coal rank is lignite and the coal seam thickness is greater than or equal to 2 meters and less than 2.5 meters, the rank of the coal seam thickness is the third rank;

[0024] When the coal rank is bituminous coal and the coal seam thickness is greater than or equal to 0.8 meters and less than 2.5 meters, the rank of the coal seam thickness is the third rank;

[0025] When the coal rank is lignite and the coal seam thickness is greater than 15 meters or less than 2 meters, the rank of the coal seam thickness is the fourth rank;

[0026] When the coal rank is bituminous coal and the coal seam thickness is greater than 15 meters or less than 0.8 meters, the rank of the coal seam thickness is the fourth rank;

[0027] When the volatile matter is less than or equal to 50% and greater than or equal to 37%, the level of the volatile matter is the first level;

[0028] When the volatile matter is less than 37% and greater than or equal to 20%, the level of the volatile matter is the second level;

[0029] When the volatile matter is less than 20% and greater than or equal to 10%, the level of the volatile matter is the third level;

[0030] When the volatile matter is less than 10%, the level of volatile matter is the fourth level;

[0031] When the ash content is greater than or equal to 0% and less than or equal to 15%, the level of the ash content is the first level;

[0032] When the ash content is greater than 15% and less than or equal to 35%, the ash content is at the second level;

[0033] When the ash content is greater than 35% and less than or equal to 50%, the ash content is at the third level;

[0034] When the ash content is greater than 50%, the ash level is the fourth level.

[0035] The grades based on coal seam depth, coal seam roof permeability, distance from coal seam roof aquifer, relative water inflow of coal seam, coal seam occurrence and structural geological conditions include:

[0036] When the coal seam depth is greater than or equal to 100 meters and less than or equal to 1,000 meters, the coal seam depth level is the first level;

[0037] When the coal seam depth is greater than 1000 meters and less than or equal to 2000 meters, the coal seam depth level is the second level;

[0038] When the coal seam depth is greater than 2000 meters and less than or equal to 2500 meters, the coal seam depth level is the third level;

[0039] When the coal seam depth is greater than 2,500 meters or less than 100 meters, the coal seam depth level is the fourth level;

[0040] When the coal seam roof permeability is less than 0.01 millidarcy, the coal seam roof permeability level is the first level;

[0041] When the coal seam roof permeability is greater than or equal to 0.01 millidarcy and less than or equal to 0.1 millidarcy, the level of the coal seam roof permeability is the second level;

[0042] When the coal seam roof permeability is greater than 0.1 millidarcy and less than or equal to 0.5 millidarcy, the coal seam roof permeability level is the third level;

[0043] When the coal seam roof permeability is greater than 0.5 millidarcy, the coal seam roof permeability level is the fourth level;

[0044] When the distance to the coal seam roof aquifer is greater than or equal to 30 meters, the level of the distance to the coal seam roof aquifer is the first level;

[0045] When the distance to the coal seam roof aquifer is less than 30 meters and greater than or equal to 20 meters, the level of the distance to the coal seam roof aquifer is the second level;

[0046] When the distance to the coal seam roof aquifer is less than 20 meters and greater than or equal to 10 meters, the level of the distance to the coal seam roof aquifer is the third level;

[0047] When the distance to the coal seam roof aquifer is less than 10 meters, the level of the distance to the coal seam roof aquifer is the fourth level;

[0048] When the relative water inflow of a coal seam is less than or equal to 1 cubic meter per day, the relative water inflow level of the coal seam is the first level;

[0049] When the relative water inflow of a coal seam is greater than 1 cubic meter per day and less than or equal to 2 cubic meters per day, the level of the relative water inflow of a coal seam is the second level;

[0050] When the relative water inflow of a coal seam is greater than 2 cubic meters per day and less than or equal to 5 cubic meters per day, the relative water inflow of a coal seam is classified as the third level;

[0051] When the relative water inflow of the coal seam is greater than 5 cubic meters per day, the relative water inflow of the coal seam is at the fourth level;

[0052] When the coal seam occurrence is within the range of greater than or equal to 15 degrees and less than or equal to 45 degrees, the level of the coal seam occurrence is the first level;

[0053] When the coal seam occurrence is greater than 45 degrees and less than or equal to 70 degrees, the level of the coal seam occurrence is the second level;

[0054] When the coal seam occurrence is greater than 70 degrees, the coal seam occurrence level is the third level;

[0055] When the coal seam dip is less than 15 degrees, the level of the coal seam dip is the fourth level;

[0056] When the structural geological condition is without fault, the level of structural geological condition is the first level;

[0057] When the number of faults in the structural geological condition is less than the first threshold, the level of the structural geological condition is the second level;

[0058] When the number of faults in the structural geological condition is greater than or equal to the first threshold, the level of the structural geological condition is the third level;

[0059] When the structural geological conditions include collapse columns or magma intrusion, the level of structural geological conditions is the fourth level.

[0060] According to the evaluation results of the coal seam resource conditions and the engineering geological conditions, the evaluation queuing index is obtained, and the calculation formula is:

[0061]

[0062] Among them, S is the evaluation queuing index, R is the evaluation result of coal seam resource conditions, and P is the evaluation result of engineering geological conditions.

[0063] The underground coal gasification zone selection evaluation method further includes:

[0064] Draw an evaluation map of underground coal gasification selection areas, where the horizontal axis is the evaluation results of coal seam resource conditions and the vertical axis is the evaluation results of engineering geological conditions;

[0065] When the coal seam resource condition evaluation result is within the range of [50, 100] and the engineering geological condition evaluation result is within the range of [50, 100], the underground coal gasification area to be evaluated is the first type of area;

[0066] When the coal seam resource condition evaluation result is within the range of (50, 100) and the engineering geological condition evaluation result is within the range of [0, 50), the underground coal gasification area to be evaluated is the second type of area;

[0067] When the coal seam resource condition evaluation result is within the range of [0, 50) and the engineering geological condition evaluation result is within the range of (50, 100), the underground coal gasification area to be evaluated is the third type of area;

[0068] When the coal seam resource condition evaluation result is within the range of [0, 50) and the engineering geological condition evaluation result is within the range of [0, 50), the underground coal gasification area to be evaluated is the fourth type of area;

[0069] The coal seam resource condition evaluation results and engineering geological condition evaluation results are respectively marked on the underground coal gasification area evaluation map.

[0070] In the second aspect, the present application proposes an underground coal gasification zone selection evaluation device, comprising:

[0071] A data acquisition module, used to acquire coal seam resource condition data and engineering geological condition data of multiple underground coal gasification selection areas to be evaluated;

[0072] A scoring module is used to score the coal seam resource condition data and the engineering geological condition data for each underground coal gasification selected area to be evaluated, based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs;

[0073] A weighted summation module is used to perform weighted summation on the scoring result of the coal seam resource condition data and the corresponding first preset weight to obtain the coal seam resource condition evaluation result; perform weighted summation on the evaluation result of the engineering geological condition data and the corresponding second preset weight to obtain the engineering geological condition evaluation result;

[0074] An index calculation module, used to obtain an evaluation queuing index according to the coal seam resource condition evaluation results and the engineering geological condition evaluation results;

[0075] The result sorting module is used to sort the evaluation queuing indexes, select the largest N evaluation queuing indexes from the sorting results, and determine the underground coal gasification selection areas to be evaluated corresponding to the N evaluation queuing indexes as the underground coal gasification selection areas suitable for carrying out underground coal gasification.

[0076] In a third aspect, the present application proposes an electronic device, comprising: a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the underground coal gasification zone selection evaluation method is executed.

[0077] In a fourth aspect, the present application proposes a computer-readable storage medium storing executable instructions, which, when executed, enable a processor to perform the underground coal gasification zone evaluation.

[0078] Beneficial effects:

[0079] This application proposes a method and device for evaluating underground coal gasification selection. This method can not only scientifically and accurately evaluate the coal resource conditions and engineering geological conditions of favorable zones, but also quantitatively rank the underground coal gasification selection zones to be evaluated, which not only has certain guiding significance for the scientific selection of underground coal gasification zones and sites, but also can provide geological basis for the subsequent implementation of underground gasification. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 A flow chart of an underground coal gasification zone selection evaluation method according to an embodiment of the present application;

[0081] Figure 2 This is a schematic diagram of underground coal gasification zone selection evaluation according to an embodiment of the present application;

[0082] Figure 3 A schematic diagram of underground coal gasification area evaluation for this application example;

[0083] Figure 4 This is a principle block diagram of the underground coal gasification zone selection evaluation device according to an embodiment of the present application. DETAILED DESCRIPTION

[0084] The present disclosure is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0085] There are many geological factors that affect underground coal gasification, including dozens of factors such as coal rock and coal quality conditions, coal seam occurrence conditions, surrounding rock conditions, geological structural conditions, hydrogeological conditions and environmental geological conditions. The existing underground coal gasification area selection evaluation method requires the acquisition of a large number of parameters during the evaluation process, and the calculation process is also quite complicated, so it is very inconvenient to use. The present application proposes a method and device for evaluating underground coal gasification areas. Based on the classification and analysis of various key geological parameters, a dual-factor evaluation method is used to evaluate the selection of favorable zones. This method can not only scientifically and accurately evaluate the coal resource conditions and engineering geological conditions of favorable zones, but also can quantitatively carry out comprehensive selection of areas, which not only has certain guiding significance for the scientific selection of underground coal gasification areas, but also provides a detailed geological basis for the subsequent implementation of underground gasification.

[0086] Embodiment 1:

[0087] This embodiment proposes a method for evaluating underground coal gasification area selection. Figure 1 As shown, including:

[0088] Step S1: obtaining coal seam resource condition data and engineering geological condition data of multiple underground coal gasification selection areas to be evaluated;

[0089] In this embodiment, dozens of geological factors that affect underground coal gasification are first classified and analyzed. While eliminating some factors with smaller effects, various key geological factors are classified into two categories. One category is coal seam resource conditions, and the coal seam resource condition data include: coal grade, coal seam thickness, volatile matter and ash content; the other category is engineering geological conditions, and the engineering geological condition data include: coal seam burial depth, coal seam roof permeability, distance from the coal seam roof aquifer, coal seam relative water inflow, and structural geological conditions.

[0090] Step S2: for each underground coal gasification area to be evaluated, scoring the coal seam resource condition data and the engineering geological condition data based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs respectively;

[0091] In the specific implementation, the selection of key geological parameters to establish an evaluation parameter index system for underground coal gasification selection areas is a key step in the evaluation method, which is related to whether the evaluation results are accurate, whether the evaluation is scientific, and whether the evaluation process is easy to operate. In this embodiment, for each underground coal gasification selection area to be evaluated, two key factors are selected, namely, the coal seam resource condition data and the engineering geological condition data are scored based on the level to which the coal seam resource condition data belongs and the level to which the engineering geological condition data belongs, respectively; wherein the levels include: first level, second level, third level and fourth level, the first level corresponds to a scoring range of: [1.0, 0.75], the second level corresponds to a scoring range of: (0.75, 0.5], the third level corresponds to a scoring range of: (0.5, 0.25], and the fourth level corresponds to a scoring range of: (0.25, 0], as shown in Table 1:

[0092] Table 1: Evaluation parameters for underground coal gasification area selection

[0093]

[0094]

[0095] From Table 1, we can see that:

[0096] Before scoring based on the class to which coal rank, coal seam thickness, volatile matter and ash belong, it should also include: determining the class to which coal rank, coal seam thickness, volatile matter and ash belong;

[0097] The determination of the coal rank, coal seam thickness, volatile matter and ash content includes:

[0098] In the case of lignite and long bituminous coal, the rank of the coal is the first rank;

[0099] In the case of lean coal and gas coal, the coal rank is the second rank;

[0100] In the case of coal grades of fat coal and lean coal, the grade of coal grade is the third grade;

[0101] In case of anthracite and coking coal, the coal rank is the fourth rank;

[0102] When the coal seam thickness is greater than or equal to 5 meters and less than or equal to 15 meters, the grade of the coal seam thickness is the first grade;

[0103] When the coal seam thickness is greater than or equal to 2.5 meters and less than 5 meters, the grade of the coal seam thickness is the second grade;

[0104] When the coal rank is lignite and the coal seam thickness is greater than or equal to 2 meters and less than 2.5 meters, the rank of the coal seam thickness is the third rank;

[0105] When the coal rank is bituminous coal and the coal seam thickness is greater than or equal to 0.8 meters and less than 2.5 meters, the rank of the coal seam thickness is the third rank;

[0106] When the coal rank is lignite and the coal seam thickness is greater than 15 meters or less than 2 meters, the rank of the coal seam thickness is the fourth rank;

[0107] When the coal rank is bituminous coal and the coal seam thickness is greater than 15 meters or less than 0.8 meters, the rank of the coal seam thickness is the fourth rank;

[0108] When the volatile matter is less than or equal to 50% and greater than or equal to 37%, the level of the volatile matter is the first level;

[0109] When the volatile matter is less than 37% and greater than or equal to 20%, the level of the volatile matter is the second level;

[0110] When the volatile matter is less than 20% and greater than or equal to 10%, the level of the volatile matter is the third level;

[0111] When the volatile matter is less than 10%, the level of volatile matter is the fourth level;

[0112] When the ash content is greater than or equal to 0% and less than or equal to 15%, the level of the ash content is the first level;

[0113] When the ash content is greater than 15% and less than or equal to 35%, the ash content is at the second level;

[0114] When the ash content is greater than 35% and less than or equal to 50%, the ash content is at the third level;

[0115] When the ash content is greater than 50%, the ash level is the fourth level.

[0116] The weight corresponding to the coal grade is A, the weight corresponding to the coal seam thickness is B, the weight corresponding to the volatile matter is C, the weight corresponding to the ash content is D, and A+B+C+D=100%.

[0117] The grades based on coal seam depth, coal seam roof permeability, distance from coal seam roof aquifer, relative water inflow of coal seam, coal seam occurrence and structural geological conditions include:

[0118] When the coal seam depth is greater than or equal to 100 meters and less than or equal to 1,000 meters, the coal seam depth level is the first level;

[0119] When the coal seam depth is greater than 1000 meters and less than or equal to 2000 meters, the coal seam depth level is the second level;

[0120] When the coal seam depth is greater than 2000 meters and less than or equal to 2500 meters, the coal seam depth level is the third level;

[0121] When the coal seam depth is greater than 2,500 meters or less than 100 meters, the coal seam depth level is the fourth level;

[0122] When the coal seam roof permeability is less than 0.01 millidarcy, the coal seam roof permeability level is the first level;

[0123] When the coal seam roof permeability is greater than or equal to 0.01 millidarcy and less than or equal to 0.1 millidarcy, the level of the coal seam roof permeability is the second level;

[0124] When the coal seam roof permeability is greater than 0.1 millidarcy and less than or equal to 0.5 millidarcy, the coal seam roof permeability level is the third level;

[0125] When the coal seam roof permeability is greater than 0.5 millidarcy, the coal seam roof permeability level is the fourth level;

[0126] When the distance to the coal seam roof aquifer is greater than or equal to 30 meters, the level of the distance to the coal seam roof aquifer is the first level;

[0127] When the distance to the coal seam roof aquifer is less than 30 meters and greater than or equal to 20 meters, the level of the distance to the coal seam roof aquifer is the second level;

[0128] When the distance to the coal seam roof aquifer is less than 20 meters and greater than or equal to 10 meters, the level of the distance to the coal seam roof aquifer is the third level;

[0129] When the distance to the coal seam roof aquifer is less than 10 meters, the level of the distance to the coal seam roof aquifer is the fourth level;

[0130] When the relative water inflow of a coal seam is less than or equal to 1 cubic meter per day, the relative water inflow level of the coal seam is the first level;

[0131] When the relative water inflow of a coal seam is greater than 1 cubic meter per day and less than or equal to 2 cubic meters per day, the level of the relative water inflow of a coal seam is the second level;

[0132] When the relative water inflow of a coal seam is greater than 2 cubic meters per day and less than or equal to 5 cubic meters per day, the relative water inflow of a coal seam is classified as the third level;

[0133] When the relative water inflow of the coal seam is greater than 5 cubic meters per day, the relative water inflow of the coal seam is at the fourth level;

[0134] When the coal seam occurrence is within the range of greater than or equal to 15 degrees and less than or equal to 45 degrees, the level of the coal seam occurrence is the first level;

[0135] When the coal seam occurrence is greater than 45 degrees and less than or equal to 70 degrees, the level of the coal seam occurrence is the second level;

[0136] When the coal seam occurrence is greater than 70 degrees, the coal seam occurrence level is the third level;

[0137] When the coal seam dip is less than 15 degrees, the level of the coal seam dip is the fourth level;

[0138] When the structural geological condition is without fault, the level of structural geological condition is the first level;

[0139] When the number of faults in the structural geological condition is less than the first threshold, the level of the structural geological condition is the second level;

[0140] When the number of faults in the structural geological condition is greater than or equal to the first threshold, the level of the structural geological condition is the third level;

[0141] When the structural geological conditions include collapse columns or magma intrusion, the level of structural geological conditions is the fourth level.

[0142] The weight corresponding to the coal seam burial depth is a, the weight corresponding to the coal seam roof permeability is b, the weight corresponding to the distance from the coal seam roof aquifer is c, the weight corresponding to the relative water inflow of the coal seam is d, the weight corresponding to the coal seam occurrence is e, and the weight corresponding to the structural geological condition is f, and a+b+c+d+e+f=100%.

[0143] Step S3: performing weighted summation on the scoring result of the coal seam resource condition data and the corresponding first preset weight to obtain the coal seam resource condition evaluation result; performing weighted summation on the evaluation result of the engineering geological condition data and the corresponding second preset weight to obtain the engineering geological condition evaluation result;

[0144] In specific implementation, it is necessary to calculate the coal seam resource condition evaluation result R and the engineering geological condition evaluation result P, and to obtain R and P by adding the product of the scores of various parameters of the coal seam resource conditions and engineering geological conditions and the preset weights of the parameters.

[0145] The scoring result of the coal seam resource condition data is multiplied by the corresponding weight to obtain the coal seam resource condition evaluation score. The calculation formula is as follows:

[0146] R=A×R 煤级 +B×R 厚度 +C×R 挥发 +D×R 灰分

[0147] Among them, R is the coal seam resource condition evaluation score, A is the weight corresponding to the coal grade, and R 煤级 is the scoring result of coal grade, B is the weight corresponding to the coal seam thickness, R 厚度 is the scoring result of coal seam thickness, C is the weight corresponding to volatile matter, R 挥发 is the scoring result of volatile matter, D is the weight corresponding to ash content, R 灰分 This is the ash content scoring result.

[0148] Multiply the scoring result of the engineering geological condition data by the corresponding weight to obtain the engineering geological condition score. The calculation formula is:

[0149] P=a×P 埋深 +b×P 渗透 +c×P 距离 +d×P 涌水 +d×P 产状 +e×P 构造

[0150] Among them, P is the engineering geological condition score, a is the weight corresponding to the coal seam depth, and P 埋深 is the scoring result of coal seam depth, b is the weight corresponding to the permeability of coal seam roof, P 渗透is the scoring result of the roof permeability, c is the weight corresponding to the distance from the coal seam roof aquifer, P 距离 is the scoring result of the distance from the coal seam roof aquifer, d is the weight corresponding to the relative water inflow of the coal seam, P 涌水 is the scoring result of the relative water inflow of the coal seam, e is the weight corresponding to the occurrence of the coal seam, P 产状 is the scoring result of coal seam occurrence, f is the weight corresponding to the structural geological conditions, P 构造 This is the scoring result of structural geological conditions.

[0151] Step S4: According to the coal seam resource condition evaluation results and the engineering geological condition evaluation results, an evaluation queuing index is obtained, and the calculation formula is:

[0152]

[0153] Among them, S is the evaluation queuing index, R is the evaluation result of coal seam resource conditions, and P is the evaluation result of engineering geological conditions.

[0154] Step S5: sorting the evaluation queuing indices, selecting the largest N evaluation queuing indices from the sorting results, and determining the underground coal gasification selection areas to be evaluated corresponding to the N evaluation queuing indices as the underground coal gasification selection areas suitable for carrying out underground coal gasification.

[0155] In this embodiment, on the one hand, the evaluation queuing indexes can be sorted, and the largest N evaluation queuing indexes can be selected from the sorting results. The corresponding underground coal gasification selection areas to be evaluated are the underground coal gasification selection areas suitable for carrying out underground coal gasification. On the other hand, an evaluation map of underground coal gasification selection areas can also be drawn, in which the horizontal axis is the evaluation result of coal seam resource conditions, and the vertical axis is the evaluation result of engineering geological conditions; the evaluation results of coal seam resource conditions and engineering geological conditions are respectively marked on the evaluation map of underground coal gasification selection areas, such as Figure 2As shown in the figure, when the coal seam resource condition evaluation result is within the range of [50, 100], and the engineering geological condition evaluation result is within the range of [50, 100], the underground coal gasification area to be evaluated is the first type of area, which is the most favorable area and is the focus of research, evaluation and mining test area; when the coal seam resource condition evaluation result is within the range of (50, 100), and the engineering geological condition evaluation result is within the range of [0, 50), the underground coal gasification area to be evaluated is the second type of area, which has general engineering conditions and is a successor development evaluation area. With the advancement of technology, it can be can be upgraded; when the coal seam resource condition evaluation result is within the range of [0, 50) and the engineering geological condition evaluation result is within the range of (50, 100), the underground coal gasification area to be evaluated is the third type of area. The resource conditions of this type of area are general and it is a reserve development area and is not suitable for large-scale development; when the coal seam resource condition evaluation result is within the range of [0, 50) and the engineering geological condition evaluation result is within the range of [0, 50), the underground coal gasification area to be evaluated is the fourth type of area. The resource and engineering conditions of this type of area are relatively poor and can be evaluated as a prospective area for underground coal gasification.

[0156] The present embodiment provides a method for evaluating the selection of underground coal gasification areas. Based on the classification and analysis of various key geological parameters, the method uses coal seam resource condition data and engineering geological condition data to evaluate the selection of favorable zones. The method can not only scientifically and accurately evaluate the coal resource conditions and engineering geological conditions of favorable zones, but also quantitatively conduct comprehensive selection of zones, which not only has certain guiding significance for the scientific selection of underground coal gasification areas and sites, but also can provide geological basis for the subsequent implementation of underground gasification.

[0157] Embodiment 2:

[0158] This embodiment is a specific example of the first embodiment, using data from a certain area in the eastern part of the Junggar Basin to describe in detail the process of the underground coal gasification area selection evaluation method, as detailed below:

[0159] In a certain area in the eastern part of the Junggar Basin, the main lignite of the Xishanyao Group (vitrinite reflectance Ro = 0.43% ~ 0.52%) is developed. The coal rank is low and it is a favorable gasification coal. The burial depth of the coal seam gradually increases from east to west, and the burial depth is about 500m ~ 1500m. The coal seam dip angle is 4° ~ 31°, and the dip angle in some areas can exceed 45°, and the coal seam dip angle is large. The main coal seam is generally about 12m thick, with good continuity, high ash content of 30%-50%, and high volatile content, generally greater than 45%. The lithology of the roof of the Xishanyao Group coal seam in the study area varies greatly in the region. In some areas, the roof lithology of the coal seam is mainly siltstone and fine sandstone, and in some areas, the roof is mudstone and siltstone mudstone, with a permeability of 0.01 ~ 0.1mD. There are many coal-bearing igneous rocks in the frontal area of ​​the Zhundong region. Through receiving instantaneous atmospheric precipitation or snow-capped mountain meltwater to replenish groundwater, it is transformed into weakly confined water of the coal-bearing system or fissure groundwater of burned rocks. According to test analysis, the relative water inflow of the main coal seam is 1-2 (m 3 / t), due to the dense lithology of the overlying Sangonghe Formation, which has good water-proof conditions, and the faults are mostly compressive plugging faults, the hydraulic connection between the high-position bedrock fissure aquifer and the coal-bearing aquifer is weak, and the thickness of the dense water-proof roof of the coal seam is about 20-30m, which is conducive to underground coal gasification. The fault types in the Zhundong area are mostly compression faults, and the fault planes are mostly plugging structural stress concentration zones. The widely developed compression thrust faults are mainly plugging fault structures with good plugging performance, which is conducive to underground coal gasification.

[0160] The underground coal gasification area selection evaluation method in this example includes:

[0161] Step S100: Acquire coal seam resource condition data and engineering geological condition data of a certain area in the eastern part of Junggar Basin;

[0162] Step S101: Scoring the coal seam resource condition data and the engineering geological condition data based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs, as shown in Table 2:

[0163] Table 2: Evaluation parameter indicators

[0164]

[0165] According to the grades of the coal seam resource condition data and the engineering geological condition data described in Table 1, the coal seam resource condition data and the engineering geological condition data are scored for the specific data of the underground coal gasification area in a certain area in the eastern part of the Junggar Basin. The scoring results are shown in Table 2.

[0166] Step S102: performing weighted summation on the scoring result of the coal seam resource condition data and the corresponding first preset weight to obtain the coal seam resource condition evaluation result; performing weighted summation on the evaluation result of the engineering geological condition data and the corresponding second preset weight to obtain the engineering geological condition evaluation result;

[0167] In this example, the coal seam resource condition evaluation score is obtained by multiplying the scoring result of the coal seam resource condition data in Table 2 with the corresponding weight. The calculation formula is as follows:

[0168] R=A×R 煤级 +B×R 厚度 +C×R 挥发 +D×R 灰分 =30×1.0+35×1.0+25×1.0+10×0.35=93.5

[0169] Among them, R is the coal seam resource condition evaluation score, A is the weight corresponding to the coal grade, and R 煤级 is the scoring result of coal grade, B is the weight corresponding to the coal seam thickness, R 厚度 is the scoring result of coal seam thickness, C is the weight corresponding to volatile matter, R 挥发 is the scoring result of volatile matter, D is the weight corresponding to ash content, R 灰分 This is the ash content scoring result.

[0170] The engineering geological condition score is obtained by multiplying the scoring results of the engineering geological condition data in Table 2 with the corresponding weights. The calculation formula is:

[0171] P=a×P 埋深 +b×P 渗透 +c×P 距离 +d×P 涌水 +d×P 产状 +e×P 构造 =

[0172] 20×0.8+15×0.65+15×0.65+20×0.7+20×0.7+10×0.6=69.5

[0173] Among them, P is the engineering geological condition score, a is the weight corresponding to the coal seam depth, and P 埋深 is the scoring result of coal seam depth, b is the weight corresponding to the permeability of coal seam roof, P 渗透 is the scoring result of the roof permeability, c is the weight corresponding to the distance from the coal seam roof aquifer, P 距离 is the scoring result of the distance from the coal seam roof aquifer, d is the weight corresponding to the relative water inflow of the coal seam, P 涌水 is the scoring result of the relative water inflow of the coal seam, e is the weight corresponding to the occurrence of the coal seam, P 产状is the scoring result of coal seam occurrence, f is the weight corresponding to the structural geological conditions, P 构造 This is the scoring result of structural geological conditions.

[0174] Step S103: obtaining an evaluation queuing index according to the coal seam resource condition evaluation results and the engineering geological condition evaluation results;

[0175] Specifically, calculate the constituency evaluation queuing index

[0176] Among them, S is the evaluation queuing index, R is the evaluation result of coal seam resource conditions, and P is the evaluation result of engineering geological conditions. Queuing is performed according to the evaluation queuing index.

[0177] Step S104: Draw an underground coal gasification area evaluation map, wherein the horizontal axis is the coal seam resource condition evaluation result, and the vertical axis is the engineering geological condition evaluation result; the coal seam resource condition evaluation result and the engineering geological condition evaluation result are respectively marked on the underground coal gasification area evaluation map, such as Figure 3 shown.

[0178] On the underground coal gasification area evaluation map, this location is in the first category of areas, which is the most favorable area, indicating that a certain area in the eastern part of the Junggar Basin is a key research, evaluation and mining test area.

[0179] This embodiment takes the underground coal gasification district in a certain area in the eastern part of the Junggar Basin as a specific example, and describes in detail the process of the underground coal gasification district evaluation method, so as to obtain the coal seam resource condition data and engineering geological condition data in a certain area in the eastern part of the Junggar Basin, and score the coal seam resource condition data and engineering geological condition data based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs, and perform weighted summation on the scoring result of the coal seam resource condition data and the corresponding first preset weight to obtain the coal seam resource condition evaluation result; perform weighted summation on the evaluation result of the engineering geological condition data and the corresponding second preset weight to obtain the engineering geological condition evaluation result, and obtain the evaluation queuing index according to the coal seam resource condition evaluation result and the engineering geological condition evaluation result; finally, the coal seam resource condition evaluation result and the engineering geological condition evaluation result are respectively marked on the underground coal gasification district evaluation map. It can be seen from the underground coal gasification district evaluation map that a certain area in the eastern part of the Junggar Basin is a key research evaluation and mining test area. This example shows that this application can scientifically and accurately evaluate the coal resource conditions and engineering geological conditions in favorable zones, which not only has certain guiding significance for the scientific selection of areas and sites for underground coal gasification, but also can provide a geological basis for the subsequent implementation of underground gasification.

[0180] Embodiment three:

[0181] This embodiment provides a device for evaluating underground coal gasification area selection. Figure 4 As shown, it includes: data acquisition module, scoring module, weighted summation module, index calculation module, and result sorting module;

[0182] The data acquisition module is connected to the scoring module, the scoring module is connected to the weighted summation module, the weighted summation module is connected to the index calculation module, and the index calculation module is connected to the result sorting module;

[0183] A data acquisition module, used to acquire coal seam resource condition data and engineering geological condition data of multiple underground coal gasification selection areas to be evaluated;

[0184] A scoring module is used to score the coal seam resource condition data and the engineering geological condition data for each underground coal gasification selected area to be evaluated, based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs;

[0185] A weighted summation module is used to perform weighted summation on the scoring result of the coal seam resource condition data and the corresponding first preset weight to obtain the coal seam resource condition evaluation result; perform weighted summation on the evaluation result of the engineering geological condition data and the corresponding second preset weight to obtain the engineering geological condition evaluation result;

[0186] An index calculation module, used to obtain an evaluation queuing index according to the coal seam resource condition evaluation results and the engineering geological condition evaluation results;

[0187] The result sorting module is used to sort the evaluation queuing indexes, select the largest N evaluation queuing indexes from the sorting results, and determine the underground coal gasification selection areas to be evaluated corresponding to the N evaluation queuing indexes as the underground coal gasification selection areas suitable for carrying out underground coal gasification.

[0188] A device for evaluating underground coal gasification area selection also includes: a drawing marking module, connected to the index calculation module, for drawing an underground coal gasification area selection evaluation map, wherein the horizontal axis is the coal seam resource condition evaluation result, and the vertical axis is the engineering geological condition evaluation result; and the coal seam resource condition evaluation result and the engineering geological condition evaluation result are respectively marked on the underground coal gasification area selection evaluation map.

[0189] The underground coal gasification district evaluation device proposed in this embodiment adopts a data acquisition module to obtain coal seam resource condition data and engineering geological condition data of multiple underground coal gasification districts to be evaluated; adopts a scoring module to score the coal seam resource condition data and engineering geological condition data; uses a weighted summation module to weighted sum the scoring result of the coal seam resource condition data with the corresponding first preset weight to obtain the coal seam resource condition evaluation result; and weighted sum the evaluation result of the engineering geological condition data with the corresponding second preset weight to obtain the engineering geological condition evaluation result; uses an index calculation module to obtain an evaluation queuing index according to the coal seam resource condition evaluation result and the engineering geological condition evaluation result; finally, uses a result sorting module to sort the evaluation queuing index, and determines the underground coal gasification districts to be evaluated corresponding to the first N evaluation queuing indices as the underground coal gasification districts suitable for carrying out underground coal gasification. The device of this embodiment can scientifically and accurately evaluate the coal resource conditions and engineering geological conditions of favorable zones, which not only has certain guiding significance for the scientific selection of underground coal gasification districts, but also can provide geological basis for the subsequent implementation of underground gasification.

[0190] Embodiment 4:

[0191] This embodiment provides an electronic device, including: a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the underground coal gasification area selection evaluation method is executed.

[0192] The electronic device may be a mobile phone, a computer or a tablet computer, etc., including a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the underground coal gasification selection area evaluation method described in the embodiment is implemented. It is understood that the electronic device may also include an input / output (I / O) interface and a communication component.

[0193] The processor is used to execute all or part of the steps in the underground coal gasification zone selection evaluation method as described in the above embodiment. The memory is used to store various types of data, which may include instructions of any application or method in the electronic device, as well as data related to the application.

[0194] The processor can be an application specific integrated circuit (ASIC), a digital signal processor (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components, and is used to execute the underground coal gasification area evaluation method described in the above embodiment.

[0195] Embodiment five:

[0196] This embodiment provides a computer-readable storage medium storing executable instructions, which, when executed, enable a processor to execute the underground coal gasification zone selection evaluation method.

[0197] If implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.

[0198] Based on this understanding, the technical solution of the present application can essentially or partly be embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the underground coal gasification zone evaluation method described in each embodiment of the present application.

[0199] The aforementioned storage media include: flash memory, hard disk, multimedia card, card-type memory (for example, SD (Secure Digital Memory Card) or DX (Memory Data Register, MDR abbreviation, memory data register) memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, CD, server, APP (Application, abbreviation of application software) application store and other media that can store program verification codes, on which computer programs are stored. When the computer program is executed by the processor, the various steps of the above-mentioned coal underground gasification area selection evaluation method can be implemented.

[0200] The various embodiments in the present disclosure are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0201] The protection scope of the present disclosure is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the scope and spirit of the present disclosure. If these changes and modifications fall within the scope of the claims of the present disclosure and their equivalents, the intention of the present disclosure also includes these changes and modifications.

Claims

1. A method for evaluating underground coal gasification area selection, characterized in that: include: Obtain coal seam resource condition data and engineering geological condition data for multiple underground coal gasification selection areas to be evaluated; For each underground coal gasification area to be evaluated, the coal seam resource condition data and the engineering geological condition data are scored based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs; Performing a weighted summation on the scoring result of the coal seam resource condition data and the corresponding first preset weight to obtain a coal seam resource condition evaluation result; Performing a weighted summation on the evaluation result of the engineering geological condition data and the corresponding second preset weight to obtain an engineering geological condition evaluation result; According to the coal seam resource condition evaluation results and the engineering geological condition evaluation results, an evaluation queuing index is obtained; The evaluation queuing indexes are sorted, the largest N evaluation queuing indexes are selected from the sorting results, and the underground coal gasification selection areas to be evaluated corresponding to the N evaluation queuing indexes are determined as the underground coal gasification selection areas suitable for carrying out underground coal gasification.

2. The underground coal gasification area selection evaluation method according to claim 1, characterized in that: The coal seam resource condition data include: coal rank, coal seam thickness, volatile matter and ash content; The engineering geological condition data include: coal seam burial depth, coal seam roof permeability, distance from coal seam roof aquifer, relative water inflow of coal seam, and structural geological conditions.

3. The underground coal gasification area selection evaluation method according to claim 2, characterized in that: The levels include: first level, second level, third level and fourth level. The score range corresponding to the first level is: [1.0, 0.75], the score range corresponding to the second level is: (0.75, 0.5], the score range corresponding to the third level is: (0.5, 0.25], and the score range corresponding to the fourth level is: (0.25, 0].

4. The underground coal gasification area selection evaluation method according to claim 3, characterized in that: Before scoring based on the coal rank, coal seam thickness, volatile matter and ash content, the method further includes: determining the coal rank, coal seam thickness, volatile matter and ash content; The determination of the coal rank, coal seam thickness, volatile matter and ash content includes: In the case of lignite and long bituminous coal, the rank of the coal is the first rank; In the case of lean coal and gas coal, the coal rank is the second rank; In the case of coal grades of fat coal and lean coal, the grade of coal grade is the third grade; In case of anthracite and coking coal, the coal rank is the fourth rank; When the coal seam thickness is greater than or equal to 5 meters and less than or equal to 15 meters, the grade of the coal seam thickness is the first grade; When the coal seam thickness is greater than or equal to 2.5 meters and less than 5 meters, the grade of the coal seam thickness is the second grade; When the coal rank is lignite and the coal seam thickness is greater than or equal to 2 meters and less than 2.5 meters, the rank of the coal seam thickness is the third rank; When the coal rank is bituminous coal and the coal seam thickness is greater than or equal to 0.8 meters and less than 2.5 meters, the rank of the coal seam thickness is the third rank; When the coal rank is lignite and the coal seam thickness is greater than 15 meters or less than 2 meters, the rank of the coal seam thickness is the fourth rank; When the coal rank is bituminous coal and the coal seam thickness is greater than 15 meters or less than 0.8 meters, the rank of the coal seam thickness is the fourth rank; When the volatile matter is less than or equal to 50% and greater than or equal to 37%, the level of the volatile matter is the first level; When the volatile matter is less than 37% and greater than or equal to 20%, the level of the volatile matter is the second level; When the volatile matter is less than 20% and greater than or equal to 10%, the level of the volatile matter is the third level; When the volatile matter is less than 10%, the level of volatile matter is the fourth level; When the ash content is greater than or equal to 0% and less than or equal to 15%, the level of the ash content is the first level; When the ash content is greater than 15% and less than or equal to 35%, the ash content is at the second level; When the ash content is greater than 35% and less than or equal to 50%, the ash content is at the third level; When the ash content is greater than 50%, the ash level is the fourth level.

5. The underground coal gasification area selection evaluation method according to claim 3, characterized in that: The grades based on coal seam depth, coal seam roof permeability, distance from coal seam roof aquifer, relative water inflow of coal seam, coal seam occurrence and structural geological conditions include: When the coal seam depth is greater than or equal to 100 meters and less than or equal to 1,000 meters, the coal seam depth level is the first level; When the coal seam depth is greater than 1000 meters and less than or equal to 2000 meters, the coal seam depth level is the second level; When the coal seam depth is greater than 2000 meters and less than or equal to 2500 meters, the coal seam depth level is the third level; When the coal seam depth is greater than 2,500 meters or less than 100 meters, the coal seam depth level is the fourth level; When the coal seam roof permeability is less than 0.01 millidarcy, the coal seam roof permeability level is the first level; When the coal seam roof permeability is greater than or equal to 0.01 millidarcy and less than or equal to 0.1 millidarcy, the level of the coal seam roof permeability is the second level; When the coal seam roof permeability is greater than 0.1 millidarcy and less than or equal to 0.5 millidarcy, the coal seam roof permeability level is the third level; When the coal seam roof permeability is greater than 0.5 millidarcy, the coal seam roof permeability level is the fourth level; When the distance to the coal seam roof aquifer is greater than or equal to 30 meters, the level of the distance to the coal seam roof aquifer is the first level; When the distance to the coal seam roof aquifer is less than 30 meters and greater than or equal to 20 meters, the level of the distance to the coal seam roof aquifer is the second level; When the distance to the coal seam roof aquifer is less than 20 meters and greater than or equal to 10 meters, the level of the distance to the coal seam roof aquifer is the third level; When the distance to the coal seam roof aquifer is less than 10 meters, the level of the distance to the coal seam roof aquifer is the fourth level; When the relative water inflow of a coal seam is less than or equal to 1 cubic meter per day, the relative water inflow level of the coal seam is the first level; When the relative water inflow of a coal seam is greater than 1 cubic meter per day and less than or equal to 2 cubic meters per day, the level of the relative water inflow of a coal seam is the second level; When the relative water inflow of a coal seam is greater than 2 cubic meters per day and less than or equal to 5 cubic meters per day, the relative water inflow of a coal seam is classified as the third level; When the relative water inflow of the coal seam is greater than 5 cubic meters per day, the relative water inflow of the coal seam is at the fourth level; When the coal seam occurrence is within the range of greater than or equal to 15 degrees and less than or equal to 45 degrees, the level of the coal seam occurrence is the first level; When the coal seam occurrence is greater than 45 degrees and less than or equal to 70 degrees, the level of the coal seam occurrence is the second level; When the coal seam occurrence is greater than 70 degrees, the coal seam occurrence level is the third level; When the coal seam dip is less than 15 degrees, the level of the coal seam dip is the fourth level; When the structural geological condition is without fault, the level of structural geological condition is the first level; When the number of faults in the structural geological condition is less than the first threshold, the level of the structural geological condition is the second level; When the number of faults in the structural geological condition is greater than or equal to the first threshold, the level of the structural geological condition is the third level; When the structural geological conditions include collapse columns or magma intrusion, the level of structural geological conditions is the fourth level.

6. The underground coal gasification area selection evaluation method according to claim 1, characterized in that: According to the evaluation results of the coal seam resource conditions and the engineering geological conditions, the evaluation queuing index is obtained, and the calculation formula is: Among them, S is the evaluation queuing index, R is the evaluation result of coal seam resource conditions, and P is the evaluation result of engineering geological conditions.

7. The underground coal gasification area selection evaluation method according to claim 1, characterized in that: The underground coal gasification zone selection evaluation method further includes: Draw an evaluation map of underground coal gasification selection areas, where the horizontal axis is the evaluation results of coal seam resource conditions and the vertical axis is the evaluation results of engineering geological conditions; When the coal seam resource condition evaluation result is within the range of [50, 100] and the engineering geological condition evaluation result is within the range of [50, 100], the underground coal gasification area to be evaluated is the first type of area; When the coal seam resource condition evaluation result is within the range of (50, 100) and the engineering geological condition evaluation result is within the range of [0, 50), the underground coal gasification area to be evaluated is the second type of area; When the coal seam resource condition evaluation result is within the range of [0, 50) and the engineering geological condition evaluation result is within the range of (50, 100), the underground coal gasification area to be evaluated is the third type of area; When the coal seam resource condition evaluation result is within the range of [0, 50) and the engineering geological condition evaluation result is within the range of [0, 50), the underground coal gasification area to be evaluated is the fourth type of area; The coal seam resource condition evaluation results and engineering geological condition evaluation results are respectively marked on the underground coal gasification area evaluation map.

8. An underground coal gasification zone selection evaluation device, characterized in that: include: A data acquisition module, used to acquire coal seam resource condition data and engineering geological condition data of multiple underground coal gasification selection areas to be evaluated; A scoring module is used to score the coal seam resource condition data and the engineering geological condition data for each underground coal gasification selected area to be evaluated, based on the grade to which the coal seam resource condition data belongs and the grade to which the engineering geological condition data belongs; A weighted summation module, used for weighted summing the scoring result of the coal seam resource condition data and the corresponding first preset weight to obtain a coal seam resource condition evaluation result; Performing a weighted summation on the evaluation result of the engineering geological condition data and the corresponding second preset weight to obtain an engineering geological condition evaluation result; An index calculation module, used to obtain an evaluation queuing index according to the coal seam resource condition evaluation results and the engineering geological condition evaluation results; The result sorting module is used to sort the evaluation queuing indexes, select the largest N evaluation queuing indexes from the sorting results, and determine the underground coal gasification selection areas to be evaluated corresponding to the N evaluation queuing indexes as the underground coal gasification selection areas suitable for carrying out underground coal gasification.

9. An electronic device, characterized in that: include: A memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the method for evaluating underground coal gasification selection area according to any one of claims 1 to 7 is executed.

10. A computer-readable storage medium, characterized in that: It stores executable instructions, which, when executed, enable the processor to execute the underground coal gasification area evaluation method described in any one of claims 1-7.

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