- 期刊
- OpenAccess
Geo-Mechanical Properties of Okaba Coal Deposit for Pillar Support System
並列摘要
This paper investigated the Geo-mechanical properties of Okaba Coal deposit for pillar support system in an underground mine, in which the unit weight of sandstone being the roof rock is 2 450 kg/m3, average Uniaxial Compressive Strength (UCS) value for sandstone sample is 58.65 MPa while the coal sample indicated a UCS value of 4.11 MPa. The Rock Quality Designation of sandstone sample is 76 % while that of coal is 35 %. The Rock Mass Rating (RMR) of sandstone is 74 while that of coal is 36. The RMR was used in the system of pillar dimension whose height is 2.6 m, width of 7.8 m and length of 32 m arranged in form of chain along the roadways to support the roof, and the panel is dimensioned to 200 m width and 1200 m length surrounded by roadways of 4 m width. The choice of the pillar dimension is purely based on the fact that it is the only one that satisfies the requirement of factor of safety of 1.6 which is sufficient enough to ensure stability of the roadways in the mine.
延伸閱讀
- 王宜達、李育聖、魏家傑、王朝正、陳國銘、劉宏義（2017）。High-temperature Corrosion of T1 Alloy under Co-firing of Coal / Biomass Charcoal Deposits。防蝕工程，31(4)，15-24。https://doi.org/10.6376/JCCE.201712_31(4).0003
- Amedjoe, C. G., Foli, G., & Nude, P. M. (2012). Geological and Geochemical Controls on the Composition of Natural Drainages in Homase Mineral Deposit Environment. Research Journal of Environmental and Earth Sciences, 4(3), 255-263. https://www.airitilibrary.com/Article/Detail?DocID=20410492-201203-201507220025-201507220025-255-263
- Diao, H., Qian, Y., & Chen, W. (2022). Research on Microstructure and Mechanical Properties of Welded Joints of Dissimilar Steels of Q345B and 20Mn23Al. World Scientific Research Journal, 8(6), 54-63. https://doi.org/10.6911/WSRJ.202206_8(6).0008
- 張智忠（2010）。The Study of Mechanical Properties on Mild Carbon Steel of S45C by Electroless Ni-P Deposition〔碩士論文，國立臺北科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0006-1308201014074800
- Akande, J. M., Onifade, M., & Aladejare, A. E. (2013). Determination of Airflow Distributions in Okaba Underground Coal Mine. Journal of Mining World Express, 2(2), 40-44. https://www.airitilibrary.com/Article/Detail?DocID=P20150604010-201304-201509100016-201509100016-40-44