ABSTRACT:

The Dunhuang Mogao Grottoes located at the Silk Road contain the 4th-14th Buddhist art which spans a period of 1000 years. Natural weathering over the time and the poor cementation of the surrounding rock bodies have resulted in a lot of geological deterioration. In 1960s, Dunhuang Academy carried out the reinforcement project and took various measures including the construction of support walls and the removal of dangerous rocks to effectively prevent the cliff from further collapsing and provide a relatively stable environment for the preservation of the wall paintings in the caves. It is necessary to assess the effect of conservation project to ensure safety of caves after more fifties years. Based on comprehensive investigation of current condition of Mogao’s cliff and it's stability parameters, this study introduces the theory of risk management, assesses and classifies the stability risks of cliff by using different methods such as historical analysis, engineering geological analogy, limit equilibrium, numerical simulation and etc., and then reinforces the areas of high-level risks by anchoring, grouting or using protective capping. Meanwhile, more real-time monitoring measures have been used to ensure the security of the Dunhuang Mogao Grottoes.

1. INTRODUCTION
Keywords:
risk management, real time system, risk assessment, Engineering, calculation, stability risk, seismic force, risk and uncertainty assessment, displacement, perilous rock body
Subjects:
Reservoir Characterization, Risk Management and Decision-Making, Information Management and Systems, Risk, uncertainty, and risk assessment
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2017. American Rock Mechanics Association
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