Study And Engineering Application Of Prestressed Anchorag Technology In God-side Roadway

Reasonable support inside roadway of god-side roadway support plays a decisive role,ordinary anchorage technology has been applied widely. The current bolting system has notsupporting roadway surrounding rock in time, causing the increased cost of supportingroadway, and the damage risk is increasing. God-side roadway prestressed anchor technologyhave properties for timely reinforcement and adjustment of the stress distribution, maintainingthe integrity of surrounding rock, etc., so study the application of prestressed anchortechnology in god-side roadway, has the great theoretical significance and engineeringpractical value.According to the structural characteristics and action mechanism of prestressed anchor,combined with the self-stabilized hidden arch theory, along a god-side roadway anchor bolt(cable) for the calculation of prestressed theory are discussed in this paper, through theoreticalcalculation analysis, obtained the theoretical calculation formula of prestressed anchor, theformula is suitable for roof surrounding rock is broken along the god-side roadway. Andestablishes with the basic of roadway support, the reinforcement support and the roadsidesupport god-side roadway prestressed anchorage system, double-anchored bolt, anchorcable and steel belt is the combination of the basic support.Combined with engineering example, using MIDAS/GTS software for differentprestressed anchorage along the god-side roadway scheme under the condition of supportingeffect has carried on the comparative analysis, numerical simulation results show that thesurrounding rock displacement, stress and plastic zone has the beneficial effects, thesupporting effect is remarkable, therefore has wide application prospect.