陕西煤炭

倾斜煤层覆岩垮落与运移特征显著不同于近水平和缓倾斜煤层。尤其多水源补给条件煤层，揭示其覆岩“裂隙场-应力场-渗流场”演化规律对于矿井防治水工作至关重要。故以王家山煤矿西二202工作面为背景，开展倾斜煤层长壁综放采场“裂隙场-应力场-渗流场”演化规律研究。得到以下主要结论，覆岩裂隙发育高度随着工作面推进距离增加，先增大，达到峰值后基本保持不变，沿采场倾斜方向裂隙发育高度呈现“上部>中部>下部”。垂直应力沿工作面倾向呈非对称性分布，顶板应力释放区向工作面中上部区域偏移，底板应力释放区向工作面中下部区域偏移。随着推进度增加，工作面裂隙向顶底板扩展，形成导水通道，顶底板水体向采空区方向渗流，顶底板孔隙压力出现负值，且随着工作面的推进向采空区深部发展。最终，针对不同水源类型制定了防治水措施。为倾斜多水源补给煤层安全开采提供了借鉴，具有一定的理论和实践意义。

The characteristics of overburden collapse and movement in inclined coal seams are significantly different from those in-horizontal and gently inclined coal seams.Especially for the mining of coal seams with multiple water supply sources, it is crucial to reveal the evolution law of the overburden “fracture field-stress field-seepage field” for safe mining.We taking the Xier No.202 working face of Wangjiashan Coal Mine as the background, carry out the research on the evolution law of “fracture field-stress field-seepage field” in the long-wall integrated mining field of inclined coal seam, and obtain the following main conclusions: the height of fissure development in overburden rock increases with the distance of working face advancement, and then remains basically unchanged after reaching the peak value.Along the dip direction of the mine, the height of fissure development shows “upper>middle>lower”.The vertical stress tends to be distributed asymmetrically along the working face, with the stress release area of the roof shifting to the upper and middle areas of the working face, and the stress release area of the floor shifting to the middle and lower areas of the working face.As the face progresses, the face fracture expands to the roof and floor plates, forming a water conduction channel, the water body of the roof and floor seeps towards the mining area, the pore pressure of the roof and floor appears negative, and develops towards the deep part of the mining area as the face progresses.Finally, water control measures have been formulated for different types of water sources.Our research provides a reference for the safe mining of inclined coal seams with multiple water sources.