Abstract
Investigations have confirmed the principal laws of the effect of rock pressure on shield supports and established the characteristic features of this effect on reinforced-concrete shields. The mean load on a ZhTShch-500 shield is 11.5–13.0 tons/m2, which is 1.3 times greater than the mean loads on timber shield canopies. The overload coefficient of ZhTShch-500 shields is 1.6. Use of the established values in calculations ensures a load-bearing capacity of reinforced-concrete tubular shields equal to 30–35 tons/m2, which should completely eliminate the possibility of failure of the load-bearing members of the canopy.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
