STUDY OF WOOD REINFORCEMENT ON HAULING ROAD SLOPES AT PT CIPTA KRIDATAMA COAL MINE
Dimas Ihsan Bagaskoro, Budi Sulistianto, Tri Karian

Institut Teknologi Bandung

Abstract

Slope failure is a phenomenon that often occurs in surface mines, both on the pit slopes and the disposal slope. One of the most common types of slope failure is a circular failure, which generally occurs on slopes with soil, fractured rock masses, mix material weathered rocks. One of the way that can be done to prevent this circular failure is by installing reinforcement on the mine slopes or changes geometry of the slopes. Wood or logs are a form of reinforcement commonly used on slopes in mining area with soil materials, especially on temporary excavation slopes. Besides being easy to obtain, the use of wood can also reduce costs and is quite easy to implement. However, until now, there are not many guidelines that can be used in installing wood reinforcement in the mining world, especially in Indonesia, which has diverse types of woody plants. This lack of guidelines causes the installation of wood reinforcement in mine slope that is carried out sometimes does not have a strong scientific basis and become ineffective. So, this study will be discussed the effect of various geometrical parameter of the wooden support installation in the mine slope such as the distance of reinforcement, and geometrical pattern to determine the best possible way to install support. This best geometrical pattern will be the recommended pattern to install wooden support in mine slope with special condition like the research example cases, to calculate the factor of safety in this study using the Bishop simplified method. Deformation analysis using RS 2 is used to determine movement or deformation on the slope of the mine road and is used to compare daily movement monitoring obtained from monitoring prism shooting.

Keywords: Wooden Support- Slope failure- Bishop Method, Slope Geometry, Monitoring.

Topic: Mining Engineering and metallurgy