P波各向异性检测在采空区导水裂隙带探测中的应用

发布时间：2018-10-16 20:13

【摘要】：为了研究工作面导水裂隙带发育情况,在陕北某煤矿进行了宽方位角、小面元、高覆盖的三维地震勘探。受地震勘探精度限制,传统方法很难对裂隙发育情况进行描述。引入P波各向异性检测技术对导水裂隙带进行研究。首先,将不同方位角地震数据进行叠加、偏移处理;之后在不同方位角偏移数据上进行蚂蚁追踪,利用蚂蚁追踪数据进行各向异性检测。经各向异性检测认为裂隙发育强度与距煤层顶板距离成反比,裂隙最大发育高度为118 m。通过各向异性数据与地震振幅数据结合分析认为研究区导水裂隙尚未发育到风化基岩面,未导通萨拉乌苏组含水层。应用实践表明,P波方位各向异性裂隙检测方法能够准确预测导水裂隙带的裂隙分布特征及发育高度。
[Abstract]:In order to study the development of water diversion fracture zone in a coal mine in northern Shaanxi, three dimensional seismic exploration with wide azimuth angle, small plane element and high coverage was carried out. Due to the limitation of seismic exploration precision, it is difficult to describe the fracture development by traditional methods. The P wave anisotropy detection technique is introduced to study the water conduction fracture zone. Firstly, seismic data with different azimuth angles are stacked and processed, then ant tracing is performed on different azimuth migration data, and anisotropy is detected by ant tracking data. The anisotropy test shows that the fracture development intensity is inversely proportional to the distance from the roof of the coal seam and the maximum height of the fracture is 118 m. Based on the analysis of anisotropic data and seismic amplitude data, it is concluded that the aqueduct fissure in the study area has not developed to the weathered bedrock surface and has not been conducted to the Sarawusu formation aquifer. The application shows that the P-wave azimuthal anisotropic fracture detection method can accurately predict the fracture distribution characteristics and development height of the water-conducting fracture zone.
【作者单位】：陕西省地质调查院;西安科技大学;国土资源部煤炭资源勘查与综合利用重点实验室;陕西省煤田物探测绘有限公司;
【基金】：国家自然科学基金资助项目(41402308) 陕西省教育厅科研计划资助项目(14JK1466)
【分类号】：P631.4;TD82

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