...空心包体应变计；主应力增量；演化规律；顶板弱化 [gap=1828]Keywords : hydraulic fracturing；stress change monitoring；hollow inclusion cell；principal stress increment；evolution law；roof weakening ..
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改进型空心包体应变计 Improved hollow inclusion technique
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测量应用采用完全温度补偿技术和自动化记录系统的空心包体应变计进行，得出了该地区地应力分布的基本规律。
To find out thoroughly the reasons of slopes unstability, earth stress has been measured at slope by means of technique of temperature compensation and automatic recording.
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