Experimental Analysis on Microstructure and Mineral Composition of Jurassic Soft Rock in Shajihai Mining Area of Xinjiang

Abstract:

In order to find out themicroscopic structure and determine mineral composition and relative content ofroadway soft rock in Shajihai mining area, this paper carried out experimentsof scanning electron microscope (SEM) analysis and X-ray diffraction analysis.SEM test results show that the microstructure of the surrounding rock isgenerally poor and joint, crack, pore are developed. The crack is easy toexpand under the effect of surrounding rock pressure and water, which makesrock mass more broken and greatly reduces the stability of surrounding rock.X-ray diffraction analysis test shows that the component content of clayminerals in the surrounding rock is high. Clay mineral in mudstone containsmontmorillonite and content of illite/smectite mixed layer is relativelyhigher, up to 45%. In conclusion, soft rock roadway of Shajihai mine areabelongs to the typical swelling-jointed compound soft rock. The targeted andreasonable compound transformation technology and coupling support measuresmust be adopted when supporting.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 24-27
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.24
• Online since: August 2013
• Authors: Xiao Lei Wang, Shun Xi Yan, Hai Qiao Wen
• Keywords: Clay Mineral, Component Analysis, Scanning Electron Microscope (SEM), Soft Rock Characteristics

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