Research on Supporting Theory of Pressure-Bearing Ring and Yield Supporting Technology in Extremely Soft Rock Roadway

Abstract:

The soft rock roadway is classified by uniaxial compressive strength of rock and water-physical properties, which includes hard surrounding rock in deep mine, soft surrounding rock, and extremely soft surrounding rock. Aimed to the situation of being hard to support the extremely soft rock roadway, with combination of the specific project of return airway crossheading roadway of sea area NO.2 mining district in Beizao coal mine, a compound roadway supporting technology based on the concrete-filled steel tube support, reinforced concrete lining, with combination of yield supporting technology was used for this specific project, for which the mechanical model of the pressure-bearing ring structure was analyzed and calculated by using fixed-end arch theory in structural mechanics and Lame formula in Elastic theory. The field test results showed that this new compound roadway supporting technology was an ideal method to support the extremely soft rock roadway, which could control the deformation of roadway and realize the stability of roadway, effectively.

• Periodical: Applied Mechanics and Materials (Volumes 395-396)
• Pages: 536-543
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.395-396.536
• Online since: September 2013
• Authors: Guang Long Qu, Jun Wang, Guo Lei Liu
• Keywords: Concrete-Filled Steel Tube (CFST) Support, Extremely Soft Rock, Pressure-Bearing Ring, Yield Supporting Technology

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