河南理工大学学报（自然科学版）2025，Vol.44Issue(4)：83-93,11.DOI:10.16186/j.cnki.1673-9787.2024030061
极软厚煤层切顶卸压沿空留巷主动超前支护技术研究
Research on active advanced support technology for gob-side entry retaining with roof cutting and pressure relief in ultra-soft thick coal seams
摘要
Abstract
Objectives Roof cutting and pressure relief gob-side entry retaining technology is widely used in coal mining in China.However,in the case of extremely soft and thick coal seam roadways,challenges such as soft coal on the sidewalls and large roadway heights arise.Traditional passive advanced support techniques often lead to roof damage and limited working space.Therefore,it is essential to develop ad-vanced support technologies for retained roadways.Methods Taking the 32021 roadway in Liangbei Coal Mine as the engineering background,a mechanical model was established to analyze the stability of the sur-rounding rock in the advance section of the roadway before and after pre-splitting roof cutting.The stress characteristics and deformation patterns of the roof in the advance section were studied,revealing the defor-mation mechanism of the surrounding rock influenced by pre-splitting roof cutting.Numerical simulations using FALC3D software were conducted to analyze the stress distribution of the roadway under directional blasting roof cutting conditions.An active anchor cable beam collaborative anchoring scheme was proposed,support parameters for active advanced support were designed,and the field applications were performed.Results The results indicated that the pre-splitting roof cutting effectively interrupted stress transfer be-tween roof layers,placing the surrounding rock of the advance section in a stress reduction zone and reduc-ing the hanging roof area at the junction of the working face and the retained roadway.Numerical simula-tions validated that the proposed anchor net cable beam could effectively control the deformation of the sur-rounding rock in the advance section after active support,contributing to the long-term stability of the road-way.Field applications demonstrated that the maximum displacement of the roof and floor did not exceed 80 mm,roof deformation was reduced by 35%,and the integrity of the roadway roof was significantly pre-served.Conclusions The proposed active advanced support technology addresses challenges such as narrow working spaces,high labor intensity,and repetitive roof support damage.It offers valuable insights for implementing advanced support methods for gob-side entry retaining under similar mining conditions.关键词
极软厚煤层/超前支承压力/主动超前支护技术/切顶卸压沿空留巷Key words
ultra-soft thick coal seam/advanced support pressure/active advanced support technology/roof cutting gob-side entry retaining分类
矿山工程引用本文复制引用
张盛,徐瑞泽,刘佳伟,朱让河,马强,王高尚,张帆,赵龙刚..极软厚煤层切顶卸压沿空留巷主动超前支护技术研究[J].河南理工大学学报（自然科学版）,2025,44(4):83-93,11.基金项目
国家自然科学基金资助项目(52374086,52174074) （52374086,52174074）
