CAJ | 학술논문

准确圈定火成岩侵入造成的煤层变薄区，有利于综采工作面高产高效。采用无线电磁波透视法对受火成岩侵入的采煤工作面进行了探测，基于综合曲线分析得到初始辐射场强与煤层吸收系数关系，进行绝对衰减层析成像重构，使用吸收系数β值大小可表征透视异常响应特征。层析成像结果与实际煤层厚度对比分析表明：1)火成岩侵入造成的煤层变薄区在绝对衰减层析成像图上有明显的透视异常反映，其分布范围与透视异常区基本吻合，无线电磁波透视探测煤层变薄区可行；2)异常区域吸收系数值β跟火成岩侵蚀厚度有关，根据异常区域吸收系数β与煤层吸收系数的大小关系可以确定煤层残余厚度。
준학권정화성암침입조성적매층변박구，유리우종채공작면고산고효。채용무선전자파투시법대수화성암침입적채매공작면진행료탐측，기우종합곡선분석득도초시복사장강여매층흡수계수관계，진행절대쇠감층석성상중구，사용흡수계수β치대소가표정투시이상향응특정。층석성상결과여실제매층후도대비분석표명：1)화성암침입조성적매층변박구재절대쇠감층석성상도상유명현적투시이상반영，기분포범위여투시이상구기본문합，무선전자파투시탐측매층변박구가행；2)이상구역흡수계수치β근화성암침식후도유관，근거이상구역흡수계수β여매층흡수계수적대소관계가이학정매층잔여후도。
Accurate delineation of the coal thinning zone caused by igneous rock intrusion, is benefi-cial to the high yield and high efficiency for the mechanized coal mining face. The igneous rock intru-sion has been detected by the radio wave perspective on one coal face. The initial amplitude and the ab-sorption coefficient have been got by comprehensive curves analysis to reconstruct the absolute attenua-tion tomography. The absorption coefficientβcan denote the exceptional response features. The contrast between tomography results and the actual coal seam thickness shows that: 1) The anomaly of coal thinning zone caused by igneous intrusion is obvious in absolute attenuation tomography map. Its dis-tribution range conforms very closely to the perspective anomaly area, and radio wave perspective to detect the coal thinning zone is feasible. 2) The absorption coefficientβis corresponding to the igneous rock erosion thickness. According to the difference between abnormal absorption coefficient and normal absorption coefficient, the coal thickness can be determined.