摘要:
在煤田开采的过程中,煤层厚度和构造等因素往往制约着煤矿的生产效率,在开采前对于这些因素的探测对于实际生产具有十分重要的指导意义. 结合实际地质情况,建立对应的正演模型,在射线追踪的理论基础上,分别研究了煤层厚度、断层、陷落柱因素下,煤层地震勘探上的反射机制与响应特征. 结果表明:煤层厚度在时间域可识别厚度为1/4λ;断层、陷落柱在地震记录存在典型断面波、绕射波特征. 煤层地震响应的研究为实际勘探的反演解释提供参考,为后期的煤炭开采提供了理论依据与实际指导.
关键词:
-
射线追踪
/
-
地震响应
/
-
煤厚
/
-
断层
/
-
陷落柱
Abstract:
In the process of coal mining, coal thickness and structural factors often restrict the production efficiency of coal mine. Be-fore mining, the detection of these factors has important guiding significance for practical production. Combined with the actual geolog-ical conditions, the authors established a forward model. Based on the ray tracing theory, the authors studied factors such as coal thick-ness, fault and collapse column in the coal seismic exploration of reflection mechanism and response characteristics. The results show that, for the thickness of coal seam in the time domain, the thickness of 1/4 lambda can be identified, and that fault and collapse col-umn in the seismic record is a typical section of wave, with characteristics of diffraction. The seismic response of the coal seam provides a reference for practical exploration of the inversion explanation and also provide a theoretical basis and practical guidance for the coal mining in the late stage.
下载: