| Author | Shrestha, Basanta Kumar |
| Call Number | AIT Thesis no. GE-97-19 |
| Subject(s) | Rock mechanics--Laos--Hongsa Basin
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Available results from index to strength tests, conducted during the period of 1994 to 1997 on 492 samples taken at depths ranging from 10.55 m to 361 m from 14 bore holes of Hongsa Coal Mine site, were complied to provide statistical summary of material properties for each material type. The statistical summary of material properties for the constituents of each strata unit were provided and also strata unit-wise as a whole. Variation in material properties with depth were interpreted. Con-elation among index and strength properties for each material type were summarized, and existence of anisotropy in strength parameters at two shearing orientations i. e. normal condition and parallel to bedding, was investigated by conducting a total of 34 direct shear tests on intact and precut specimens of various materials to further enhance the knowledge for a particular mode of failure. The results of direct shear tests and clay content from hydrometer analysis were interpreted for a reliable way of dete1mining the actual residual strength from the precut and intact specimens. The available knowledge of geological structures, existence of anisotropy in shear strength parameters, and material properties and their conditions were interpreted for identifying possible modes of slope failure. From the overall preliminary analysis, the ultimate slope angles were recommended under circular mode of failure with dry and saturated slope conditions and at likely possible ranges of factor of safety of 1.1, 1.2 and 1.3 with various ultimate slope height which was assumed to vary from 150 m to 350 m, and these results were compared with previous preliminary analysis results obtained under the same conditions. The techno economical viability of possible mining excavation sequences was also interpreted in relation to overall stability. |
| Year | 1998 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phienwej; |
| Examination Committee(s) | Prinya Nutalaya ;Balasubramaniam, A. S.; |
| Scholarship Donor(s) | DAAD, Germany; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology |