On the instability problems in South Hlimen landslide, Mizoram

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">South Hlimen Quarry is one of the best quality sand stone quarries in the state of Mizoram. The problems of instability at the quarry site are due to the blocky nature of such gaint blocks are because of the intersection of the bedding and joint planes. On the 10^th August, 1992, the disastrous landslide took place as a result of planer and toppling failure of the blocky sandstones. The field observations indicated that such incident can be minimized in future, if a detail study can be conducted, recorded and classified as per International Society for Rock Mechanics (ISRM). In order to meet the increasing demand of sandstone production which arises with rapid urbanization of Aizawl, a more mechanized and systematic quarrying will be required, instead of a haphazard excavation from the foothill. It will help to protect the hiIIslopes as well as surrounding environments.</span>