Experimental Study on Mutual Effects of Rock Tunneling Positions with High Underground Pressures

Abstract:

Using the mould pattern contrasting experiments the carrying capacities and deformation effects of underground tunnels within soft bed and top or floor strata are studied under high ground pressures in this paper. Through measuring mould strengths and deformation with different stratum and space position the relations of tunneling positions in different strata with carrying capacity and strains are obtained. It is shown that the soft seam tunneling under high ground pressure can bring about higher secondary stresses and have more acting effects than top or floor tunnels. In the same pressure conditions the carrying capacity of having top tunneling above soft tunnel decreases near 30% with that of having floor tunnel. The mutual effects with double horizontal spaces of tunnels decrease 25%. The experiment conclusions are important significance of conducting and applying for reasonable designing underground tunneling engineering.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 1367-1370
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.1367
• Online since: September 2013
• Authors: Quan Chen Gao, Cheng Xiang Lei, Ming Liang, Hua Shuai Zhao
• Keywords: Experimental Study, High Underground Pressure, Mutual Effects, Tunneling Position

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