The Rock Mass Rating (RMR), Geological Strength Index (GSI) and kinematic analysis are widely employed in geotechnical engineering practice. The RMR and GSI both are used for rock mass characterization while the kinematic analysis is applied to identify the mode of failure of slope based on rock discontinuities and slope face characteristics of rock.

An attempt has been made to analyze the RMR, GSI and Kinematic Analysis using in-situ data corresponding to Vindhyan sandstone. The data has been collected from outcrops at seven different locations in and around Markundi hill along SH-5, Chopan, Sonbhadra. The relationship between RMR and GSI for Vindhyan sandstone in the study area has been attempted using generalize equation proposed by Hoek (2013) while the kinematic analysis has been applied to decipher the weak zone of failure using RocScience Dips software.

The lowest RMR value estimated is 35 for location S-4 and the highest RMR value is 58 for location S-1. Other locations viz, S-2, S-3, S-5, S-6 and S-7 have the RMR value from 42 to 49 which infers that the Vindhyan sandstone existing at Markundi is characterized by both poor as well as fair rock mass.

The GSI value of the location S-1 is estimated as 34 (minimum) and 46 (maximum) of location S-4. GSI value of the same rock formation also corroborates that the rock mass belongs to poor as well as fair rock mass.

The wedge failure is inferred due to intersection of two sets of joints oriented in north-west and north-east direction. The line of intersections of these two discontinuities are observed in wedge shaped block. It is concluded that the locations under investigations have tendency of wedge failure.

岩土工程实践中广泛采用了岩体质量评级（RMR），地质强度指数（GSI）和运动学分析。RMR和GSI都用于岩体表征，而运动学分析则根据岩石的不连续性和岩石的斜面特征来识别斜坡的破坏模式。

已经尝试使用对应于Vindhyan砂岩的原位数据来分析RMR，GSI和运动学分析。数据是从Sonbhadra的Cho-5沿SH-5的Markundi山及其周围的七个不同地点的露头收集的。已尝试使用Hoek（2013）提出的广义方程来研究区域内Vindhyan砂岩的RMR与GSI之间的关系，而运动学分析已使用RocScience Dips软件应用于破损的薄弱区域。

对于位置S-4，估计的最低RMR值为35，对于位置S-1​​，最高RMR值为58。其他位置，即S-2，S-3，S-5，S-6和S-7的RMR值介于42至49之间，这表明存在于Markundi的Vindhyan砂岩的特征是贫瘠且岩石光滑大量的。

位置S-1​​的GSI值估计为位置S-4的34（最小值）和46（最大值）。同一岩层的GSI值也证实了岩体属于不良岩体，也属于中等岩体。

楔形破坏是由于西北和东北方向的两组关节相交而得出的。在楔形块中观察到这两个不连续的相交线。结论是，所研究的位置具有楔形破坏的趋势。