Abstract: The 3106 transportation crossheading of Jinsheng Podi Coal Mine is excavated to a distance of 604 m at the front of the roadway to expose lamprophyre,resulting in low roadway excavation efficiency,difficulty in rock breaking by the tunneling machine,and difficulty in roof support.Through the optimization of the roadway passing through lamprophyre construction technique,a joint construction technique of "loose blasting+mechanical rock breaking" is proposed,adopting the "shallow deep hole advance grouting+truss anchor cable+spray grouting+movable π-shaped steel shed" joint support technology,the rock breaking failure rate of the tunneling machine is reduced from 27.4% to 4.2%,and the excavation speed is increased to 4.8 m/d.The phenomenon of silicified coal body fragmentation affecting the support effect is controlled,and the subsidence amount of the roof is reduced from 420 mm to 190 mm.The collapse depth of the shoulder angle is reduced from 1.6 m to 0.3 m,and the formation rate of the roadway is increased to over 98%,achieving significant application results.