神东矿区各矿井在回采过程中由于工作面布置方式调整，工作面前方常会出现以往工作面空巷。为避免工作面过空巷期间发生顶板事故，总结了神东矿区多个工作面和空巷赋存条件、过空巷处理方法与矿压控制效果，分析了工作面过空巷期间顶板超前断裂失稳机理。综合考虑空巷、泵送支柱、煤柱与支架对顶板的不同支撑作用，采用数值模拟研究了不同煤柱尺寸、周期来压破断位置、空巷跨度与泵送支柱强度条件下，工作面过空巷期间顶板下沉和弯曲拉应力分布情况，结果表明：随着空巷与工作面斜角度从90°垂直减小至0°平行，空巷对工作面影响的推进长度减小，但过空巷期间工作面矿压显现范围增大，强度更加剧烈。工作面过空巷期间矿压显现强度主要受煤柱尺寸、过空巷前上一次顶板断裂位置、空巷跨度和空巷支护情况等因素的控制。随着工作面靠近空巷，煤柱必然逐渐失稳，且大多数空巷在工作面开采前已经存在，其跨度难以改变。神东矿区通过加强巷道顶板支护和通过等压调整顶板周期破断位置以实现工作面过空巷期间的矿压控制。随着泵送支柱峰值强度和弹性模量的增大，对空巷顶板的控制效果明显，但在顶板悬露过长时可能发生失稳破坏并失去承载能力。当顶板周期断裂位置分别位于过空巷前后，过空巷期间顶板能够承担主要上覆载荷，采场矿压得到有效控制；反之，顶板将在过空巷期间发生超前断裂，导致发生冒顶和压架事故。最后以神东矿区哈拉沟煤矿综采工作面过空巷为例，分析了泵送支柱和等压开采在工作面过空巷期间的矿压控制效果，为神东矿区乃至其他矿区工作面过空巷期间矿压控制提供借鉴。

In Shendong mining area, there may be several abandoned roadways ahead of some mining faces due to the adjustment of the face layout. In order to avoid roof accidents when the mining face crossing abandoned roadways, the occurrence conditions of mining faces and abandoned roadways, mine pressure control methods and effects in Shendong mining area were summarized, and the mechanism of roof advance fracture when the working face crossing abandoned roadways was analyzed. With the consideration of the different supporting effects of abandoned roadways, pumping pillars, coal pillars and supports, numerical simulation was used to study the subsidence and bending tensile stress of the main roof under different coal pillar sizes, roof periodic fracture positions, widths of the abandoned roadways, and strength of the pumping pillars. Results show that with the inclined angle between the roadways and the working faces decreases from 90° vertical to 0° parallel, the advancing length of the working face affected by the abandoned roadways decreases, where the effect intensity increases. The mine pressure of working face when crossing the abandoned roadways is mainly control by the size of the coal pillar, the position of the previous roof periodic fracture before crossing the abandoned roadways, the width and the supporting strength of the abandoned roadways. Due to the inevitable failure of the coal pillars with the mining face approaches the abandoned roadways, and the width of the abandoned roadways is difficult to change, the strengthen supports of the abandoned roadways and waiting mine pressure before crossing the abandoned roadways are always adopted to prevent main roof from advance fracture in Shendong mining area. With the peak strength and elastic modulus of the pumping pillars increase, the roof of the abandoned roadways will be supported better, but the pumping pillars may failure under great load caused by the overlong roof hanging. If the adjacent twice roof periodic fracture occur before and after crossing the abandoned roadways, the main roof can bear most of the overlying load during crossing the abandoned roadways and the mine pressure can be controlled effectively. Otherwise, the advance fracture of the main roof will occur as well as the roof caving and supports crushing. Finally, the fully mechanized mining faces of Halagou coal mine in Shendong mining area are taking as examples, and the mine pressure control effects of pumping pillars and waiting mine pressure during the process of crossing the abandoned roadways were analyzed, which can provid reference for the mine pressure control when crossing the abandoned roadways in Shendong mining area and even other mines.