Abstract:Purpose: The large section of drainage roadway through the crushed zone of Julong copper mine was originally supported by the combined support method of anchor rods+anchor ropes+steel arch frame, but the support effect was poor, and the problem need to be solved. Method: To solve the practical problem, the support method of pipe sheet + post-wall grouting is proposed for the area of broken surrounding rock. The pipe sheet is cast with C50 concrete and built-in HPB300 and HPB400E type steel bars. Each section of the roadway is supported by 6 sections of pipe sheets, and grouting holes are left in each section of pipe sheets. Numerical simulation was used to analyze the support effect of the large section of roadway through the broken surrounding rock. Result: The results show that the deformation of the surrounding rock of the roadway is millimeter deformation after the tube sheet + grouting support, and the maximum stress in the tube sheet + grouting support structure is 30.46 MPa. The support method of the tube sheet + post-wall grouting was successfully applied in the drainage roadway of the Julong copper mine through the broken zone with a good support effect. Significance: The results provide a theoretical reference for the construction of similar roadways.