中文摘要：

以五沟煤矿地质条件为背景,采用三维有限差分数值软件FLAC3D的固液耦合模式,在煤层埋深、岩溶溶洞顶面与煤层间距不同时,对煤层带压开采过程中煤层底板及岩溶溶洞周围岩体的应力及塑性破坏变化规律进行分析,结果表明：在其他工况条件相同时,煤层埋深越大,应力集中程度越大,煤层底板及岩溶溶洞周围岩体的塑性破坏越严重,越易发生突水事故;岩溶溶洞顶面与煤层间距越小,岩溶溶洞活化程度越高,越易发生突水事故,岩溶溶洞顶面与煤层间距对煤层底板及岩溶溶洞周围的垂向集中应力影响较小。

英文摘要：

Based on geological condition of Wugou Mine, utilizing solid-liquid coupling mode of FLAC3D software to analyze stress and plastic failure change regularity of coal seam floor and karst carve surrounding rock during pressurized mining associat- ed with different mining depth and distances between carve top face and coal seam. The results indicated that when the coal seam is deeper, the stress is more concentrated, plastic failure of coal seam floor and karst carve surrounding rock is more serious, and water inrush accident is more likely to happen~ when the distance between carve top face and coal seam is smaller, activation ex- tent of karst carve is higher, and water inrush accident is more likely to happen. The distance between carve top face and coal seam has little influence on vertical concentrated stress of coal seam floor and surroundings of karst carves.