Design and study of self-moving energy absorption and anti- impact roadway advanced support

In order to improve the anti-impact property of support,prevent and control the rockburst effectively,the self-moving energy absorption and anti-impact roadway advanced support for rockburst mine is designed and innovated from the point of anti-impact. The support can adjust the supporting width. The function of support self-moving is real- ized through the front pushing-back pulling way. The top beam is installed with thin-walled hexagonal energy absorp- tion and anti-impact components. The column is installed with expanding diametral energy absorption and anti-impact components. The support has the function of yield,energy absorption and anti-impact. The “ surrounding rock-energy absorption supporting” system can be formed when using the energy absorption and anti-impact support to support roadway. When rockburst occurs,first,the energy absorption and anti-impact component can dissipate the surrounding rock impact energy directly through plastic deformation. Second,the yielding space of energy absorption and anti-im- pact component provides a certain amount of energy releasing space for coal rock,and dissipates the impact energy of surrounding rocks indirectly. Third,the constant force deformation stage of component improves the forcing situation of support under impact loading,provides time for hydraulic valve opening,and effectively improve the anti-impact performance of support. Fourth,in the process of yielding and energy absorption,the support and surrounding rock form a new “surrounding rock-support” system again after self-adjustment,which is conducive to the stability of roadway. The energy absorption and anti-impact support has higher supporting intensity and stronger anti-impact ability,and provides a new type of support to prevent and control rockburst.