煤层陷落柱的三维地震槽波正演模拟
|
摘要
采用透射法槽波地震方法对煤层陷落柱进行了三维正演模拟。发现煤层中无陷落柱时,X分量同相轴连续性中断,而Y与Z分量连续性好。当煤层中存在陷落柱时,X分量中央底部形成明显的能量集中区域,在Y与Z分量上出现同相轴中断现象,形成次级槽波。改变炮点位置,陷落柱处的地震槽波能量衰减相对较小,而透射陷落柱后的槽波能量大幅衰减。
The 3 D forward modeling of coal seam subsided column is carried out by the method of transmission channel wave seismic. In the case of coal seam with no subsided column, the event continuity in X-component is interrupted and the event in Y-component and Z-component has a good continuity. In the case of coal seam with subsided columns, an obvious area of energy concentration is formed around the bottom of the center part in X-component. Besides, the event interruptions occur in Y-component and Z-component, resulting in secondary channel waves. By changing the shot position,the energy attenuation of the channel wave near subsided column is relatively small, while the energy shows a significant attenuation after transmitting through the subsided column.
The 3 D forward modeling of coal seam subsided column is carried out by the method of transmission channel wave seismic. In the case of coal seam with no subsided column, the event continuity in X-component is interrupted and the event in Y-component and Z-component has a good continuity. In the case of coal seam with subsided columns, an obvious area of energy concentration is formed around the bottom of the center part in X-component. Besides, the event interruptions occur in Y-component and Z-component, resulting in secondary channel waves. By changing the shot position,the energy attenuation of the channel wave near subsided column is relatively small, while the energy shows a significant attenuation after transmitting through the subsided column.
引文
[1]胡国泽,滕吉文,皮娇龙,等.井下槽波地震勘探——预防煤矿灾害的一种地球物理方法[J].地球物理学进展,2013,28(1):439-451.
[2]姬广忠,程建远,胡继武,等.槽波衰减系数成像方法及其应用[J].煤炭学报,2014,39(S2):471-475.
[3]王伟,高星,李松营,等.槽波层析成像方法在煤田勘探中的应用——以河南义马矿区为例[J].地球物理学报,2012,55(3):1 054-1 062.
[4]冯磊,周明奂,董郑,等.矿井槽波地震数据极化特征分析[J].煤炭学报,2015,40(8):1 886-1 893.
[5]冯磊,董郑,周明奂,等.基于时频域极化滤波的勒夫型槽波提取[J].煤田地质与勘探,2016,44(3):103-108.
[6]冯磊,张玉贵,张豪,等.构造煤槽波地震探测可行性分析[J].采矿与安全工程学报,2017,34(5):1 027-1 034.
[7]杜艳艳,冯磊,余为维,等.透射法地震勘探中槽波几何运动学特征[J].地球物理学进展,2017,32(5):1 978-1 983.
[8]杨思通,程久龙.煤巷地震超前探测数值模拟及波场特征研究[J].煤炭学报,2010,35(10):1 633-1 637.
[9]姬广忠,程建远,朱培民,等.煤矿井下槽波三维数值模拟及频散分析[J].地球物理学报,2012,55(2):645-654.
[10]卫红学.陷落柱柱体结构的地震波场分析[D].太原:太原理工大学,2014.
[2]姬广忠,程建远,胡继武,等.槽波衰减系数成像方法及其应用[J].煤炭学报,2014,39(S2):471-475.
[3]王伟,高星,李松营,等.槽波层析成像方法在煤田勘探中的应用——以河南义马矿区为例[J].地球物理学报,2012,55(3):1 054-1 062.
[4]冯磊,周明奂,董郑,等.矿井槽波地震数据极化特征分析[J].煤炭学报,2015,40(8):1 886-1 893.
[5]冯磊,董郑,周明奂,等.基于时频域极化滤波的勒夫型槽波提取[J].煤田地质与勘探,2016,44(3):103-108.
[6]冯磊,张玉贵,张豪,等.构造煤槽波地震探测可行性分析[J].采矿与安全工程学报,2017,34(5):1 027-1 034.
[7]杜艳艳,冯磊,余为维,等.透射法地震勘探中槽波几何运动学特征[J].地球物理学进展,2017,32(5):1 978-1 983.
[8]杨思通,程久龙.煤巷地震超前探测数值模拟及波场特征研究[J].煤炭学报,2010,35(10):1 633-1 637.
[9]姬广忠,程建远,朱培民,等.煤矿井下槽波三维数值模拟及频散分析[J].地球物理学报,2012,55(2):645-654.
[10]卫红学.陷落柱柱体结构的地震波场分析[D].太原:太原理工大学,2014.