It is found that cyclic loading at high differential stress level will lead to the decrease of felicity ratio , and the value max can be decreased by some crack systems in specimen . there is still a lot of ae during unloading at high differential stress level , which implies that the deformation is dominated by fracturing at low differential stress level , and the deformation by frictional sliding increases greatly at high differential stress level 關(guān)于應(yīng)力方式對巖石破裂的影響,發(fā)現(xiàn)較高差應(yīng)力水平下的多次循環(huán)加卸載會使felicity比減小;某些構(gòu)造能使巖石產(chǎn)生felicity效應(yīng)的應(yīng)力門檻值_ ( max )降低;由高差應(yīng)力水平下卸載時仍有大量聲發(fā)射產(chǎn)生推測:在低差應(yīng)力水平下,破裂以裂紋尖端的突然擴(kuò)展為主;在高差應(yīng)力水平下,沿已有的裂紋面的滑動破裂大量增加。
The cataclastic rocks appeared in the fault zone include structural lenticles , fault breccias , protocataclasite and cataclasite . the microscopical cataclastic deformation mechanisms involved are microcracking , frictional sliding and pressure - solution , but there might have had ductile deformation relating to dislocation sliding in feldspar and quartz of the plutons 斷裂帶內(nèi)碎裂巖系列構(gòu)造巖主要是碎裂化巖石(包括構(gòu)造透鏡體和構(gòu)造角礫巖) 、初碎裂巖和碎裂巖,顯微變形機(jī)制主要有破裂作用、摩擦滑動和壓溶作用。