Xianyang,December 27 - Shandong Energy Group’s first TBM full-face tunneling machine was put into use in Tingnan Coal Company,which improvessingle-shift footagebynearly five times.
The tunneling speed of TBM is 4 to 10 times that of the general roadheader.To utilize its full potential, Tingnan had three times sent 55 employees to the equipment manufacturer to learn the operation process.They also contacted the Sichuan Tongtong Coal Mine, the first domesticcompany to deployTBM, to learn expertise.
Given that the mudstone sectioncouldblock the cutter head and the guide groove easily, they reduce the size of the solenoid valve opening to shorten the cutter head speed from 23 mm to 12 mm per minute. The backwater is connected to the cutter head to dilute the mud, and the cutting time is extended from 50 minutes to 90 minutes. They will also optimize the upgrade of the laser pointer in the TBM tunneling machine, so that the error between the center line of the equipment and the centerline of the roadway is controlled between 15 and 20 cm.