Design and application of self-formed roadway support for cutting roof and relieving pressure in one-kilometer deep mine
In order to solve the problems for self-formed roadway of roof cutting and pressure relief under complex deep conditions,taking the transport roadway of 703 working face of Hongyang No.3 Mine as the research object,the constant resistance anchor cable support and self-formed roadway of roof cutting were applied,and the stress of roadway roof and the deformation of roadway surrounding rock were monitored.The results showed that:blasting roof cutting ahead of working face roof roadway significantly reduced the stress,the roof subsidence in the self-formed roadway was small,the maximum roof subsidence was about 385 mm,the average subsidence was about 280 mm,the maximum floor heave was 545 mm,there was no obvious roadside heave,and no rib spalling of the coal wall,the requirements for production safety was satisfied.The surrounding rock deformation of the roadway was controllable and the effect of gob-side retaining was favorable.
one-kilometer deep mineroof cutting and pressure relievinggob-side entry retainingconstant resistance anchor cable
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