伪三维地震勘探法在煤田勘查中的应用
|
摘要
勘探区属郭庄煤矿的后备井田,勘探的目的是掌握井田主可采煤层的赋存形态与断层、陷落柱发育特征。根据勘探区的地质条件,地质任务,兼顾质量和成本,勘探设计方案最终确定为3线1炮制线束状观测系统,采用中间放炮,使勘探物理点由常规二维设计的3000个减至700个,勘探成本明显降低。勘探前后的资料对比分析表明, 3~#煤层的展布特征和断层构造有较大不同,其中3~#煤层展布形态由NE向变化均匀,两翼对称的背斜构造修改为等高线变化扭曲相对剧烈,两翼对称的向斜构造;勘探后新解释断层5条,断点3处,另外3条已知断层的形态、位置、落差等相差各异。
The exploration area is a reserved minefield of Guozhuang coalmine,to grasp main mineable coal seam occurrence and fault,subsided column characteristics,gave attention to exploration area geological condition,exploration quality and cost, the designed scheme finally deciding as 3 lines 1 shooting system track group recording geometry.By the use of split shooting,cut down prospecting physical point from conventional 2D design 3000 to 700,thus lowered down prospecting cost. From information contrast before and after prospecting indicated that No.3 coal seam spreading characters and fault structure have major differences:No.3 coal seam spreading evenly varying from NE,symmetrical limbs anticline revised into contour relatively violent distorting symmetrical limes syncline;newly interpreted 5 faults and 3 fault points after prospecting,3 known faults have changed their configuration,position and throw.
The exploration area is a reserved minefield of Guozhuang coalmine,to grasp main mineable coal seam occurrence and fault,subsided column characteristics,gave attention to exploration area geological condition,exploration quality and cost, the designed scheme finally deciding as 3 lines 1 shooting system track group recording geometry.By the use of split shooting,cut down prospecting physical point from conventional 2D design 3000 to 700,thus lowered down prospecting cost. From information contrast before and after prospecting indicated that No.3 coal seam spreading characters and fault structure have major differences:No.3 coal seam spreading evenly varying from NE,symmetrical limbs anticline revised into contour relatively violent distorting symmetrical limes syncline;newly interpreted 5 faults and 3 fault points after prospecting,3 known faults have changed their configuration,position and throw.
引文
[1]何樵登,熊维纲．应用地球物理教程—地震勘探[M]．北京:地质出版社,1990．
[2]王振东．浅层地震勘探应用技术[M]．北京:地质出版社,1994．
[3]董敏煜,地震勘探[M]．北京:石油大学出版社,2000．
[4]吴铁军．二维勘探新观点[J]．中国煤田地质,2006,18(s)．
[5]李金花．解团结,刘原英．黄土山区煤田三维地震勘探应用实例[J]．中国煤田地质,2006,18(3)．
[2]王振东．浅层地震勘探应用技术[M]．北京:地质出版社,1994．
[3]董敏煜,地震勘探[M]．北京:石油大学出版社,2000．
[4]吴铁军．二维勘探新观点[J]．中国煤田地质,2006,18(s)．
[5]李金花．解团结,刘原英．黄土山区煤田三维地震勘探应用实例[J]．中国煤田地质,2006,18(3)．
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