###### Abstract  
The roadway project of broken rock mass in the Shilu Iron Deposit was taken as the research object to discuss the stability control of the surrounding rocks using support patterns with broken rock mass. The grade evaluation of rock mass quality was conducted based on the geomechanical classification of rock mass. The roadway support effect in broken rock mass was calculated. Then, the section convergence characteristics of roadway surrounding rocks were analyzed under the current support scheme using displacement monitoring technology. The conclusions were described as follows: (1) The surrounding rock integrity of the No.6 and No.7 transportation roadways in the middle section of the Baoxin mining area (Level 120) is poor. Based on geological survey data and rock mass classification, the rock mass quality in this region has been rated as Class IV. The joint support pattern of the anchor net and shotcrete was used according to the support guidelines. (2) The parameters for the support structure within Shilu Iron Deposit were designed, according to the requirements, as follows: the use of Portland cement; a shotcrete thickness of 55 mm; resin bolts with a minimum outer diameter of \(\varphi\) 20 mm and a length of 2200 mm; and row and column spacings of 1100 mm each. Meanwhile, a rectangular metal mesh of 80 \(\times\) 80 mm was used as the anchor mesh. (3) The cross-section displacement reached 20 mm within a week using the support pattern according to displacement monitoring results of the on-site roadway section. Moreover, the convergence deformation rate significantly changed. However, the rate rapidly decreased after the first week, and the cross-section showed no further deformation after one month. The support pattern could control the displacement of surrounding rocks, which was verified by the monitoring results. broken surrounding rocks; support pattern; joint support; surrounding rock stability +
Footnote †: journal: Applied sciences
simulation method to determine the REV size of the target rock mass at Liyang Power Station. [PERSON] et al. (2020) analyzed the geological characteristics, damage types, influencing factors, and support types of the broken rock mass roadway of Xinli Gold Mine. The Q system, RMR, and GSI are used to obtain the rock mass grading and physical and mechanical parameters. The surrounding rock partition, stability analysis, and support scheme design are conducted based on the rock mass grading results. [PERSON] et al. (2020) proposed a new method for the scientific and rational characterization of complex cracks in the stability analysis of roadway surrounding rocks. The method addresses the challenges posed by cracks in the surrounding rock of deeply buried roadways under complex geological conditions. On-site measurements are combined with numerical simulations and physical experiments to provide a strong ability for comprehensive analysis. [PERSON] et al. (2020) focused on the 790 m horizontal section in Jinchuan Mine II for their research. They investigated the formation and evolution law of the fracture zone in the surrounding rock and proposed strategies that minimize the initial cracking zone and halt its growth. [PERSON] et al. (2020) designed a roadway reinforcement consisting of wet shotcreting and bolt support. The proportion of wet shotcreting is determined in industrial tests. [PERSON] et al. (2020) optimized the support form and parameter selection for roadways in deep mining areas based on the calculation results of Flac3D simulation software. [PERSON] et al. (2020) analyzed the failure causes of roadway support in a deep copper mine. The roadway support in the broken area is optimized based on the calculation results of the broken ring radius and stress distribution, which achieves positive engineering results. [PERSON] et al. (2020) systematically evaluated the existing support patterns in the Jinchuan mining area. Four different support schemes are proposed based on the on-site support failure.