煤田地质与勘探2024，Vol.52Issue(11)：24-36,13.DOI:10.12363/issn.1001-1986.24.03.0208
吐哈煤田艾丁湖一区煤炭地下气化地质评价体系
Underground coal gasification in the Aidinghu mining area,Turpan-Hami coalfield:Geological evaluation system and the selection of the optimal coal seam
摘要
Abstract
[Objective]Underground coal gasification(UCG)is an innovation in traditional coal mining technology.The prerequisites for successful UCG include developing a systematic geological evaluation system and scientifically select-ing the optimal coal seam.[Methods]Using mathematical analysis methods such as analytic hierarchy process(AHP),coefficient of variation method,and technique for order preference by similarity to ideal solution(TOPSIS),this study systematically analyzed the coal quality,coal seam occurrence,hydrology,surrounding rocks,geological structures,haz-ardous elements,and geological exploration degree of coal reservoirs in the Aidinghu mining area,Turpan-Hami coalfield.Accordingly,this study deeply explored the feasibility of UCG in the Aidinghu mining area,constructed the resource evaluation system for selecting the optimal coal seam for UCG,and determined gasifier sites.[Results and Conclusions]The results indicate that the study area exhibits coals with low ranks and simple structures.The coal seams in the area display low moisture and ash contents,moderate volatile constituents,substantial quantity,simple geological structures,and moderate burial depths.The roofs and floors of the coal seams consist largely of mudstones,siltstones,and fine-grained sandstones,with faults being underdeveloped.Furthermore,the study area boasts abundant coal re-serves,low hazardous element contents in the coal seams,and a high geological exploration degree.All these render the study area suitable for UCG.The second-level evaluation indices consist of 23 geological factors such as coal type,the burial depth of coal seams,the lithology of coal seam roofs and floors,and coal reserves.Using reasonable mathematic-al statistics and scientific quantitative transformation,this study determined the comprehensive weight and grades of these indices and established a multi-level resource evaluation system for selecting the optimal coal seam for UCG ap-plicable to the study area.Using this evaluation system,as well as the weighted sum method and TOPSIS,this study de-termined that the top three coal seams favorable for UCG in the Aidinghu mining area are the upper part of the No.8 coal seam,the No.11 coal seam,and the No.7-3 coal seam sequentially.Finally,the upper part of the No.8 coal seam was identified as the most favorable coal seam for UCG in the study area.The results of this study provide a scientific basis for the subsequent UCG implementation in the study area and serve as a reference for selecting the optimal coal seam for UCG in other areas.关键词
吐哈煤田/煤炭地下气化/地质评价/选层/评价体系Key words
Turpan-Hami coalfield/underground coal gasification(UCG)/geological evaluation/selection of the optim-al coal seam/evaluation system分类
能源科技引用本文复制引用
曾志伟,员艺轩,来鹏,田继军,杨曙光,胡振鹏,王博,蔚雨,王海超,刘韫碹..吐哈煤田艾丁湖一区煤炭地下气化地质评价体系[J].煤田地质与勘探,2024,52(11):24-36,13.基金项目
新疆维吾尔自治区重大科技专项(2022A03015-1) （2022A03015-1）
