Study on comprehensive support technology of mine gateway with thick soft and weak roof

in order to soive the high deformation and ificut suppor problems of the gateway with the tick and sot oofthe nunerical simulatio means was appied to analyze the stress distibution law under the previous suppor condititon in Heshun Zhengbang Maine. 'he paper provided the optimized cross section shape. the renforcement of th surounding rock weak area and surounding rock controltechnolog with the comprehensive support A comprehensive suppot measurewvith the super power bolt.the bolt / steel mesh l anchor conbined support and th grouting reinforcement of the weak area was applied .Afer the optimized surounding rock conrotechndogy and comprehesive suport measures conducted,the stress peak inthe stress concentrated area was reduced by 63.64% and the relevant convergence betwee the twvo sidewells was reduced with 28 m and was reduced by 25.93%. The convergence value between the roof and foor was reduced with 46 mm and was reduced by 58.25%.Afer the ceal mining face vas pushed forward with 40 m,the relevant convergence between the roof and foor was no changed and the comprehensivesupport technology should be applied to the thick and weak roof.