單軸壓縮下含層理加錨巖石力學(xué)特性研究
[Abstract]:In order to analyze the influence of anchoring mode and bedding on mechanical properties of anchored rock, similar materials were used to preform bedded rock, 0 擄and 90 擄standard specimens of bedding were drilled in laboratory, and screw bolt was made of 45 # steel. The end anchoring and full-length anchoring of the specimens were carried out respectively to obtain three kinds of specimens without anchor rod, end anchoring and full-length anchoring. The deformation and strength characteristics of the specimens were analyzed by uniaxial compression test on MTS815 rock mechanics test system. The results show that the strength of rock can be improved by the bolt, and the direction of bedding and the anchoring mode affect the strength of rock. The compressive strength of the rock under full-length Anchorage is greater than that of the end anchoring specimen with the same bedding, and the uniaxial compressive strength of the 90 擄bedding Anchorage specimen with the same Anchorage mode is greater than that of the 0 擄bedding Anchorage specimen. With different anchoring methods, the failure modes of the specimens are also different. According to the different anchoring modes, the failure forms can be divided into two types: shear tensile and shear fault. The anchoring mode has no effect on the failure mode of anchor rod, both of which are the slip between rock mass and grouting interface, but the full-length Anchorage is different from the end Anchorage, the length of the anchoring bolt is longer and the bond strength is higher than that of the full-length Anchorage bolt. More and thicker rock debris can be brought out when failure occurs.
【作者單位】: 重慶大學(xué)煤礦災(zāi)害動力學(xué)與控制國家重點實驗室;重慶大學(xué)資源及環(huán)境科學(xué)學(xué)院;
【基金】:煤礦災(zāi)害動力學(xué)與控制國家重點實驗室自主課題重點項目(No.2011DA105287-ZD201504)~~
【分類號】:TU45
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