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为了解电法勘探、地震勘探及重力勘探在吉利岩溶塌陷区应用的可行性,本研究分别对该区的土层及岩石进行分类采样,利用对称小四极,单孔地震纵波波速测试及环刀法分别对土层及岩石的样品进行电阻率、纵波波速及密度测试分析,结果表明充气土洞、充气溶洞与相应的围岩介质电阻率差异最大(∞),完整灰岩与充水溶洞的电阻率差异次之(14022.46Ω·m),粉质粘土与耕植土的电阻率差异最小(28.33Ω·m);完整灰岩与充气溶洞密度差异最大(2.64 g/cm3),裂隙或破碎灰岩与充气溶洞密度差异次之(2.30 g/cm3),含碎石粉质粘土与粉质粘土密度差异最小(0.07 g/cm3);完整灰岩与充气溶洞波速差异最大(>3660 m/s),裂隙或破碎灰岩与充气溶洞波速差异次之(3460 m/s),完整灰岩与裂隙灰岩波速差异最小(>200 m/s).土层、岩石及异常体之间的物性差异明显,适合开展电法、地震及重力勘探,另外,本研究还总结出吉利岩溶塌陷区耕植土、粉质粘土、碎石土、裂隙灰岩和完整灰岩的电阻率、弹性波速、物质密度的范围值、平均值、常见值、标准值,为岩溶塌陷区地球物理综合方法解释提供了可靠依据.
In order to understand the feasibility of electrical prospecting, seismic exploration and gravity exploration in Geely karst subsidence area, this study classified the soil layers and rocks in the area respectively, and used symmetrical small quadrupole, single-hole seismic wave velocity test, Knife method respectively for soil samples and rock resistivity, longitudinal wave velocity and density test analysis, the results show that inflatable cave, inflatable cave and the corresponding rock resistivity of the largest difference (∞), complete limestone and water-filled cave (14022.46Ω · m). The difference between the resistivity of silty clay and cultivated soil is the smallest (28.33Ω · m). The difference between the density of intact limestone and inflatable cave is 2.64 g / cm3, The density difference between broken limestone and aerated karst cave is secondly (2.30 g / cm3), the difference between crushed silty clay and silty clay is the smallest (0.07 g / cm3); the difference between wave velocities of intact limestone and aerated cave is the largest (> 3660 m / s), the difference in wave velocity between fissured or crushed limestone and aerated karst (3460 m / s), and the difference between the velocities of intact limestone and fissured limestone (> 200 m / s). Between soil layers, rocks and anomalous bodies The physical properties of the difference is obvious, suitable for electrical methods, earthquakes and gravity exploration, the other The study also concluded that the range, average value, common value and standard value of resistivity, elastic wave velocity and material density of cultivated soil, silty clay, crushed stone, rift limestone and intact limestone in the karst collapse area of Jiri are Karst subsidence area geophysical comprehensive method to provide a reliable basis for interpretation.