智能化工作面高密度三维地震勘探及效果分析  

High-density 3D Seismic Prospecting Serving and Its Effects Analysis in Intelligent Working Face

作　　者：李静涛 王伟[2] LI Jingtao;WANG Wei(China Coal Pingshuo Group Co.,Ltd.,Shuozhou 036000,China;Shanxi Geophysical Chemical Exploration Institute Co.,Ltd.,Yuncheng 044004,China)

机构地区：[1]中煤平朔集团有限公司,山西朔州036000 [2]山西省地球物理化学勘查院有限公司,山西运城044004

出　　处：《煤炭技术》2024年第1期96-101,共6页Coal Technology

基　　金：国家自然科学基金青年科学基金项目(42102212)。

摘　　要：西山矿区XHG煤矿地质构造复杂,严重影响了智能化采煤的顺利实施。为此,开展了高密度三维地震勘探方法试验。采用宽方位、宽频激发和接收、小面元高覆盖的“两宽一高”采集技术,获得了126万次/km^(2)的高密度空间采样的野外数据。应用叠前、叠后综合去噪和组合反褶积技术,取得了有效频带10~100 Hz、50~70 Hz主频的高分辨率成像数据;基于构造敏感地震属性筛选和融合技术,预测了2203智能化工作面内部的小规模断层7条、陷落柱12个。井下700余口顺层非定向和穿层定向钻孔验证结果表明:落差大于3 m断层和长轴直径大于30 m陷落柱的识别准确率接近80%,高密度三维地震为综采工作面智能化开采提供了精准地质保障。The complex geological structures developed in XHG coal mine,Xishan coal-field,which seriously affects the smooth implementation of intelligent coal mining work.So,a high-density 3D seismic exploration test was carried out.Using the"wide-azimuth,broadband and high-density"seismic acquisition method featured with wide-azimuth,wide frequency excitation and reception,and high folds of small bin,and the spatial sample rate per square kilometer of the field data is up to 1.26 million times.A high-resolution prestack migration data with bandwidth of 10-100 Hz and main frequency of 50-70 Hz is obtained by applying pre and post-stack comprehensive denoising and combined well-controlled deconvolutiona.Based on the selection and fusion of seismic attributes sensitive to structure,seven small-scale normal faults and 12 collapse columns located in 2203 intelligent working face were predicted.The verification results of more than 700 boreholes along the bed and through the bed show that the identification accuracy are close to 80%respected to the faults with a throw of more than 3 m and collapse columns with a long axis diameter of more than 30 m.High-density 3D seismic has well fulflled the goal of providing accurate geological support for intelligent mining in fully mechanized working face.

关 键 词：高密度 宽方位 宽频 多属性融合 探采对比 

分 类 号：P631.4[天文地球—地质矿产勘探]