Aiming at the problems of long throwing distance of gangue, high block rate and low utilization rate of blasthole in the drilling and blasting of small section rock roadway, taking the S8208 roadway of Yangmei No. 1 Mine as the background, the restrictions for the speed of rock roadway drivage were determined by expert interviews and on-site follow-up investigation. On this basis, targeted blasting parameters, support parameters, and labor organization optimization are carried out. The two-step cutting technology is used to control the throwing distance of gangue within 15m, the blasthole utilization rate is increased to 92%, and the bulk rate is significantly reduced; based on numerical simulation technology and on-site observation of the surrounding rock convergence and deformation, optimizing the support parameters, reducing the workload of cable support by 53%, while ensuring the safety of the roadway. Using the "double twelve" labor organization, by increasing the parallel operation rate to achieve a single shift three cycles, the single shift footage is up to 5.2m, the average single shift footage is 4.8m, The highest drivage speed reaches 251m/month, the average drivage speed is 210m/month, and the monthly footage is increased by more than 40%. Practical results show that, based on the analysis of factors restricting the speed of drivage, by optimizing the cutting technology, support and labor organization, it is possible to achieve rapid drivage with a small section rock roadway by drilling and blasting, which can provide a reference for the same type of rock roadway drivage.
张召冉,张之慧,岳中文,等. 小断面岩巷钻爆法快速掘进技术及工艺[J]. 科学技术与工程, 2021, 21(36): 15392-15399.
Zhang Zhaoran, Zhang Zhihui, Yue Zhongwen, et al. Study on Rapid Drivage Technology and Process Base on Drilling and Blasting Method in Small Section Rock Roadway[J]. Science Technology and Engineering,2021,21(36):15392-15399.