Some results of analyzing failure on the limestone blocks and model them in three-dimensional space. Case study in Ha Long Bay, Quang Ninh province, Vietnam

This paper presents some analytical results of the failure types at 06 typical limestone islands, which are the symbols of Ha Long Bay, including: Ga Choi, Dinh Huong, Hon But and Thien Nga (Swan) islands, etc. The analytical results have indicated that most of these islands can occur plane failure on fracture surfaces. Besides, the paper also presents three-dimensional models that clearly reflect the potential failure at each island, it is a basis for protecting them later. The obtained results have important significance for planning and development of Ha Long Bay area, a World Natural Heritage in Quang Ninh province (Vietnam).