Rock shear strength value c, which reflects stratum lithology is the most fundamental factor, and it is affected by other factors.
地层岩性的抗剪强度指标是最根本的因素，且受其它诸因素的影响。
Study shows that: incised valley of the rock mass caused by unloading relaxation, caused by rainwater infiltration rock strength degradation is the formation of red layer a major factor in landslides.
研究表明：河谷下切引起的岩体卸荷松弛，雨水进渗导致的岩体强度衰减是导致红层滑坡形成的主要因素。
Rock strength is related to drilling parameters and features of formation rock. Formation pore pressure is an important affecting factor on rock strength.
在石油钻井施工过程中，岩石的抗钻强度主要受井下地层岩石性质的影响，地层孔隙压力则是影响岩石抗钻强度的一个重要参数。
The research results thow that the strength of the surrounding rock is the most important factor which affects the deformation of the in-floor-rock roadways.
研究表明，增加巷道与煤层的法线距离对减小巷道的变形量虽有一定的作用，但这种影响并不明显。
When the pile design safety factor is small, the anti-slide strength of rock and soil is not fully exerted. The finite element method has some discrepancy with the traditional method.
当滑坡设计安全系数较小时，岩土体抗滑强度未得到充分发挥，有限元与极限分析法有一定差距；
When the pile design safety factor is small, the anti-slide strength of rock and soil is not fully exerted. The finite element method has some discrepancy with the traditional method.
当滑坡设计安全系数较小时，岩土体抗滑强度未得到充分发挥，有限元与极限分析法有一定差距；
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