中文摘要：

基于淮南矿区某矿17238孤岛工作面回风平巷具体地质条件，采用FLAC∞数值模拟软件对孤岛面沿空掘巷超前支承压力分布特征进行了分析．结果表明：孤岛工作面沿空掘巷的超前支承压力最大峰值明显大于常规工作面沿空掘巷，应力集中系数是常规工作面沿空掘巷的1．84倍．为研究沿空掘巷顶板“小结构”的稳定性，构建了孤岛面窄煤柱沿空掘巷围岩结构力学模型，揭示了孤岛面窄煤柱沿空掘巷围岩控制机理，提出了具有针对性的围岩变形控制对策．现场工程实践应用表明：巷道采用重新优化设计后的支护方案效果较好，巷道两帮及顶底板相对变形量与优化前相比分别减少约55％及50％，孤岛面窄煤柱沿空掘巷围岩变形得到有效控制．

英文摘要：

Based on the on-site geological conditions of tailgate at 17238 island coalface in Hua- inan mining area, advance abutment pressure distribution characteristics of gob-side entry driv- ing was analyzed by numerical simulation software FLAC3D. Analysis results indicate that the maximum advance abutment pressure of gob-side entry driving of the island coalface is bigger than gob-side entry driving of a regular coalface, and the stress concentration factor is 1.84 times of the regular coalface. In order to study the small structure stability of gob-side entry driving roof, the mechanical model of surrounding rock structures for gob-side entry driving in narrow coal pillar of island coalface was built, the control mechanism was revealed and the con- trol measures were proposed as well. Field demonstration shows that the supporting perform- ance of the optimized supporting schemes is better, and the relative deformations of two ribs and roof-floor of roadway decreased by 55% and 50% respectively, and the surrounding rock deformation of gob-side entry driving in narrow coal pillar of island coalface was effectively con- trolled.