浅层数字地震仪在沙漠煤田勘探中的应用
|
摘要
<正> 一、引言为提高煤田的勘探精度,降低勘探成本,增进煤田的开发效益,并配合钻井勘探,推进地震勘探方法在沙漠地区的应用,以解决沙漠煤田中的重要地质问题,我们在内蒙古巴图塔井田,用浅层地震勘探方法查明了沙漠煤层断层 F_1的断距、产状、走向及地表平面位置,并发现了 F_2～F_4隐伏断层;查明了母花海子第四纪掩埋河道和 A 区南、东缘第四
A shallow seismic prospecting has been implemented in the Batuta coal field in the northwest of China to improve the precision of prospecting in coal field,reduce survey costs,increase exploitative benefit,and coerting with well drilling,to bring about a great advance in applying the method of seismic prospecting in coal field,to solve signicant geo- logical problem of coal field in desert.After the shallow seismic Prospecting,we ascertained the existence of the F_1 fault in the coal measures in the desert,worked out the location, displacement,attitude and stike of the F_1 fault as well as location of the hidden F_2～ F_4 fault.We also ascertained the buried river course in Quaternary and the depth and dis- tribution of the buried ancient depression in Quaternary in the southeast of region A.We finally did an experiment to explore the ancient scoured boundary of the No.3 coal seam in the southeast of region A and located the boundary of the rich coalbcd.The depth and ve- locity structure between seams Q_4,Q_3s,J_2～J_(1-2y)and J_(1-2y)on each measuring line have been presented accurately,formed integrated basic material for the designing and exploita- tion of the coalbed to be exploited.This important achievement proved to be corrected by the result of geological drilling accomplished by No.105 geological team of Inner Mongolia.
A shallow seismic prospecting has been implemented in the Batuta coal field in the northwest of China to improve the precision of prospecting in coal field,reduce survey costs,increase exploitative benefit,and coerting with well drilling,to bring about a great advance in applying the method of seismic prospecting in coal field,to solve signicant geo- logical problem of coal field in desert.After the shallow seismic Prospecting,we ascertained the existence of the F_1 fault in the coal measures in the desert,worked out the location, displacement,attitude and stike of the F_1 fault as well as location of the hidden F_2～ F_4 fault.We also ascertained the buried river course in Quaternary and the depth and dis- tribution of the buried ancient depression in Quaternary in the southeast of region A.We finally did an experiment to explore the ancient scoured boundary of the No.3 coal seam in the southeast of region A and located the boundary of the rich coalbcd.The depth and ve- locity structure between seams Q_4,Q_3s,J_2～J_(1-2y)and J_(1-2y)on each measuring line have been presented accurately,formed integrated basic material for the designing and exploita- tion of the coalbed to be exploited.This important achievement proved to be corrected by the result of geological drilling accomplished by No.105 geological team of Inner Mongolia.
引文
[1] 邢集善等,山西黄土区煤田地质勘查方法技术的应用研究,山西地质,4卷,2期,1989．
[2] 唐文榜,高分率地震勘探在煤田勘查中的应用效果,物探与化探,11卷,2期.1989．
[2] 唐文榜,高分率地震勘探在煤田勘查中的应用效果,物探与化探,11卷,2期.1989．
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心