采矿与安全工程学报2026，Vol.43Issue(3)：685-696,12.DOI:10.13545/j.cnki.jmse.2025.0461
基于顶板耦合的厚煤层开采初次来压步距研究
Study on the first weighting step distance in thick coal seam mining based on roof coupling
摘要
Abstract
To reveal the formation mechanism of the first weighting step distance during deep and thick coal seam mining,this study took a thick coal seam working face in the Huaibei mining area as the engineering background.Based on fracture mechanics and the thin plate bending theory,a coupled double-layer thin-plate model of the immediate roof-main roof system was established.Moreover,the concept of interlayer coupling stiffness was introduced to characterize the coordinated deformation behavior between the two rock strata,and analytical expressions for the first weighting step distance were derived under both strong and weak coupling conditions.A three-dimensional discrete element model was further constructed with the aid of 3DEC software,and a parameter sensitivity analysis was performed considering the thickness and elastic modulus of both the immediate and main roofs.The results indicate that with the increase in interlayer coupling stiffness,immediate roof thickness,and main roof thickness,the overall flexural stiffness of the roof structure improves,energy release is delayed,and the first weighting step distance significantly enlarges.Field monitoring of the thick coal seam working face shows that the measured first weighting step distance is 25.6 m,which agrees well with the theoretical value of 26.7 m and the numerical result of 26 m.The findings provide a theoretical basis and technical reference for the analysis on roof stability and ground pressure control in deep and thick coal seam mining.关键词
顶板耦合/初次来压步距/断裂力学/矿压控制Key words
roof coupling/first weighting step distance/fracture mechanics/ground pressure control分类
矿业与冶金引用本文复制引用
贺恩磊,庞迎春,李海燕,孟志明,夏茂哲,聂锋..基于顶板耦合的厚煤层开采初次来压步距研究[J].采矿与安全工程学报,2026,43(3):685-696,12.基金项目
国家自然科学基金项目(U2468215) （U2468215）
