利用消除调谐效应的AVO属性进行煤体结构识别  

Eliminate the tuning effect of AVO attribute for coal structure identification

作　　者：师素珍[1] 郭家成 白洁玢 李逸菲 陶然 孙静月 李光明 SHI SuZhen;GUO JiaCheng;BAI JieBin;LI YiFei;TAO Ran;SUN JingYue;LI GuangMing(State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)煤炭精细勘探与智能开发全国重点实验室,北京100083 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《地球物理学报》2025年第4期1542-1554,共13页Chinese Journal of Geophysics

基　　金：国家自然基金面上项目(42474186);中央高校基本科研业务费专项资金资助(2022JCCXMT01);高等学校学科创新引智计划资助(B18052);煤炭资源与安全国家重点实验室开放基金项目(SKLCRSM22DC02)。

摘　　要：随着煤矿开采深度的不断增加,煤与瓦斯突出的风险也逐渐增大,构造煤发育是煤与瓦斯突出的重要原因,合理预测构造煤对于煤矿资源安全开采具有重要意义.为了准确划分构造煤,从正演的角度出发,首先分析双层单界面情况下构造煤和原生煤的AVO响应特征,其次建立更加符合实际情况的三层双界面模型,研究截距与梯度随煤层厚度及煤层顶底板岩性的变化规律,最后对寺河矿区3#煤层构造煤进行了预测.结果表明,在调谐效应的影响下难以直接利用截距和梯度圈定构造煤,通过校正截距与梯度可以消除煤层厚度变化对AVO属性的影响,进而实现构造煤与原生煤的有效划分.因此,依据校正后的截距和梯度值可以准确预测构造煤发育区,为防治煤与瓦斯突出提供地质理论依据.With the increasing of coal mining depth,the risk of coal and gas outburst is gradually increasing.The development of tectonic coal is an important cause of coal and gas outburst.Reasonable prediction of tectonic coal has important significance to the safe mining of coal resources.In order to accurately classify tectonic coal,from the perspective of forward modeling,analyze AVO response characteristics of structural coal and primary coal under double-layer and single-interface conditions firstly.And then a three-layer doubleinterface model more in line with the actual situation is established to study the change law of intercept and gradient with the thickness of coal seam and the lithology of coal seam roof and floor.Finally,the tectonic coal of No.3 coal seam in Sihe mining area is predicted.The results show that it is difficult to delineate tectonic coal directly by intercepts and gradients under the influence of tuning effect.By correcting intercept and gradient,the effect of coal seam thickness change on AVO property can be eliminated,thus realizing the effective division of tectonic coal and primary coal.Therefore,the corrected intercept and gradient values can accurately predict the tectonic coal development area,and provide geological theoretical basis for preventing coal and gas outburst.

关 键 词：调谐效应 AVO属性 构造煤 原生煤 

分 类 号：P631[天文地球—地质矿产勘探]