#TITLE_ALTERNATIVE#

• Main Author: Choldun Mubarrak Saefudin (NIM 121 02 057) , Mohammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/8641
• Institution: Institut Teknologi Bandung

Abstract: <br /> <br /> <br /> <br /> <br /> Join research between three institutions (ITB, Kyushu University, and PT. ANTAM Tbk. UBPE Pongkor) has been conducted to establish the recommendation of underground opening stability including sill pillar estimation. Assumption used in the sill pillar estimation is total weight of filling material will act as load that must be supported by sill pillar is used as assumption in the sill pillar estimation. However, by curing process of cement in the filling material, the strength of filling material will be increased. Therefore, filling material will not totally fall down towards the stope after the sill pillar was mined. In order to know the failure height of filling material, observation of filling material behavior due to sill pillar extraction is required. <br /> <br /> <br /> <br /> <br /> One of the methods to observe and analyze the falling down behavior of filling material is simulation method using physical model test which is designed to represent condition of stope and filling material in the field. <br /> <br /> <br /> <br /> <br /> The simulation reveals that the increasing of height of model will reduce the falling down percentage. On the contrary, the falling percentage model w ill be increase when physical model getting wider. The relation between inclination of model and curing time of model shown that after three days, model which has inclination of 55degree gives 86percent falling down, and model which has inclination of 65degree gives 100percent falling down. Whereas after 7 days and 14 days model shown that the falling down percentage is 100percent in all inclination. <br />