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| 煤田陷落柱的超声模拟分析 | |
| 引用本文： | 杨双安,常锁亮.煤田陷落柱的超声模拟分析[J].物探与化探,2005,29(4):355-358. |
| 作者姓名： | 杨双安 常锁亮 |
| 作者单位： | 1. 中国矿业大学,机电学院,北京,100083;山西煤田地质综合普查队,山西,晋中,030600 2. 中国地质大学,能源系,北京,100083 |
| 摘 要： | 通过超声波模拟试验, 研究了煤层陷落柱的反射波组和绕射波组特征以及绕射波组对反射波组特征的影响。结果表明, 煤田高分辨率地震勘探资料在目的层埋深200～500 m时, 经过三维偏移后, 可以将菲涅耳带半径收缩到1/5～1/3, 能够准确地解释直径大于30 m的陷落柱;对直径为15～30 m的陷落柱解释结果也较为可靠, 有效地提高了勘探精度。 |
| 关 键 词： | 煤田陷落柱 反射波 绕射波 超声模拟 菲涅耳带半径 |
| 文章编号： | 1000-8918（2005）04-0355-04 |
| 收稿时间： | 05 20 2004 12:00AM |
| 修稿时间： | 2004-05-20 |
AN ULTRASONIC SIMULATION ANALYSIS OF COALFIELD COLLAPSE COLUMNS |
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| YANG Shuang-an,CHANG Suo-liang.AN ULTRASONIC SIMULATION ANALYSIS OF COALFIELD COLLAPSE COLUMNS[J].Geophysical and Geochemical Exploration,2005,29(4):355-358. | |
| Authors: | YANG Shuang-an CHANG Suo-liang |
| Institution: | 1. China University of Mining and Technology, Beijing 100083, China; 2. Comprehensive investigation Party, Shanxi Coal Geological Bureau, Jinzhong 030600, China; 3. Department of Energy Resources, China University of Geosciences, Beijing 100083, China |
| Abstract: | The study and explanation of coalfield collapse columns, especially of small ones, constitute a key factor in coal mine safe production. However, it is very difficult to explain small coal collapses by seismic data of field reflection and refraction waves in practical production. In this paper, the characteristics of reflection and refraction wave sets and the influence of reflection wave set to refraction wave set are studied for coalfield collapse columns on the basis of ultrasonic simulation tests. The results show that coalfield high-resolution seismic data can reduce the radius of Fresnel zone to 1/5~1/3 for the target buried in the depth of 200~500 m, and interpret accurately collapse columns with diameters longer than 30m. Reliable explanation results can also be obtained for collapse columns with diameters of 15~30m. Therefore, the exploration precision is obviously improved. |
| Keywords: | coalfield collapse column reflection wave refraction wave ultrasonic simulation Fresnel zone |
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