求翻译：本文以大光包滑坡为例，感兴趣的是滑带性质受何种岩性控制？滑带的摩阻力是如何骤降的？滑带岩体损伤碎裂化的成因机制如何？为了解决上述问题，作者多次进驻大光包基地，在查明区域工程地质条件的基础上，做了野外的勘探和测试，如颗粒筛分、钻孔取芯、钻孔电视、声波测试以及室内电镜扫描和物理力学性质试验等，对滑带和滑床岩体的损伤特性做了较为深入的分析研究，加上室内物理模拟试验直观再现地震下岩体损伤过程，通过理论和试验对大光包滑坡滑带损伤机理、岩体碎裂化摩阻力骤降做了一定程度的分析和解释。本文研究获得以下主要结论：是什么意思？

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