基于沿不稳定覆岩下掘进的综放沿空巷道顶板煤体出现的沿水平方向挤压破裂问题，以王家岭矿103工作面具体条件为工程背景，采用现场调研、理论分析、数值模拟和工业性试验相结合的综合研究方法，分析综放沿空巷道顶板煤体挤压破裂力学演化机理及相应的控制技术。研究结果表明：①受不稳定覆岩破断回转运动影响，顶板煤体沿水平方向发生明显挤压运动，造成顶板浅部煤体挤压、错动和破碎；②关键块回转运动行为将对沿空巷道围岩产生不稳定的支承压力σ_j，同时还将对顶板煤体产生偏斜挤压力σ_d，两者共同作用是沿空巷道顶板煤体沿水平方向发生挤压变形和破裂的根本原因；③数值分析表明，靠煤柱侧水平位移量约为240 mm，靠实体煤侧顶板变形量约为40 mm，两侧顶板位移量的显著差异必将导致相邻岩层间的错动滑移并出现挤压破裂，0水平位移点由顶板中心位置向实体煤侧明显偏移。④不稳定覆岩下沿空掘巷顶板控制，既要对靠煤柱侧顶板进行加强支护，同时还要提高支护结构对顶板煤岩体水平运动的适应性，据此提出了“高强锚杆支护+锚索槽钢组合结构”的顶板支护方案，并进行现场应用。现场工程实践表明，该技术可有效控制综放沿空巷道顶板煤体挤压破裂问题，为类似地质生产条件下综放沿空巷道围岩控制提供理论依据和技术支撑。

In view of the horizontal squeezing and fracture of the roof coal in the fully.mechanized caving roadway driving along gob under unstable overburden, No.103 working fow of Wangjialing mine was used as the engineering background, a comprehensive method including filed investigation, theory analysis and numerical modelling was employed to analyze the deformation and failure mechanism and corresponding control technology. The results shows:①Under the influence induced by fracture and rotation movement of unstable overlying strata, the roof coal body undergoes obvious squeezing movement in the horizontal direction, causing the superficial coal mass to be squeezed, displaced and broken. ②A unstable mining stress σj exerted on the coal mass surrounding the gob side entry in the vertical direction was induced by the rotation movement of the key blocks, meanwhile a compression stress σd exerted on the coal pillar in the inclination direction was also induced; the interaction between the two is the root cause of squeezing and fracture and instability of the top coal mass；③The horizontal displacement of roof on coal pillar side is about 240 mm and and the deformation of the top of the solid coal side is about 40mm. The significant difference of the displacement of the top plates on both sides will inevitably lead to the displacement and slip between adjacent rock layers and the occurrence of squeezing and fracture, and the 0 level displacement point is significantly offset from the center of the top plate to the solid coal side. ④The roof control of the roadway along the gob under unstable overburden was not only to strengthen the support of roof in the coal pillar side, but also to improve the adaptability of the support structure to the horizontal movement. According to this, the "high-strength bolt support + anchor cable" scheme is proposed, and the steel combined structure in the roof was applied in the field. Field engineering practice indicates that this support technology can effectively control the deformation of the coal mass surrounding the gob-side entry driving.