Investigation of The Mine Design of BBP Mine in Angwan Kade, Kokona Local Government Area, Nasarawa State, Nigeria

Abstract

The study investigated the mine design of the BBP mine located in Angwan Kade, Kokona Local Government Area of Nasarawa State, Nigeria. The absence of a comprehensive understanding of mining engineering principles in the initial planning phase of the mine necessitated a thorough investigation to identify and rectify the shortcomings in the existing mine design. The research focused on determining the nature and strength of the parent rock, effective mine design, and suggest appropriate support systems. Comprehensive geo-mechanical analyses were conducted using Uniaxial Compressive Strength (UCS) tests and Schmidt Hammer tests. Fieldwork and laboratory tests revealed that the rock mass, predominantly gneiss, exhibits structural integrity ranging from weak to strong, with UCS values between 24.77 MPa and 57.93 MPa, and Schmidt Hammer from 63 MPa to 70 MPa. The findings indicate that the rock varies from moderate to strong, necessitating support systems for underground mining operations in the mine. The heterogeneity in rock strength highlights the need for tailored mine design and support strategies based on local geological conditions. Recommended support systems include the application of shotcrete to provide additional surface support, particularly in areas with fractured rock, and the use of timber frames in less competent sections to maintain structural integrity. The study emphasizes the importance of integrating detailed geological mapping and continuous monitoring to adapt the mine design to changing conditions within the vertical shaft. The findings also provide a robust foundation for safe, efficient, and cost-effective mining operations, ensuring the sustainability of the mining project in the BBP mine.