朱家河煤矿采用综合机械化开采时，开切眼宽度达6.2m，断面大，且开采煤层松软、顶板存在软弱互层及层间弱面属典型的复合顶板，若继续采用大断面金属棚支护，将出现巷道压力大、金属棚变形明显、安装液压支架困难、施工周期长、接续紧张等一系列问题，进而矿井安全生产压力也随之增大。 使用极限平衡区理论、计算机数值模拟计算设计方法设计出切眼支护形式并采用数值模拟验算和现场支护试验相结合的支护方式验算和优化方法，对朱家河煤矿松软煤层复合顶板条件下，大断面切眼巷道支护技术展开了研究，得出以下主要结论： （1）采用极限平衡区理论结合数值分析计算的支护设计方法，确定大断面巷道支护方式为“左旋螺纹钢锚杆＋金属网+金属梁＋锚索”的联合支护方式，并计算得到了支护参数。 （2）通过在设计支护方式下数值模拟实验验算得到大断面巷道稳定性特征，支护后，巷道顶底板及两帮位移量明显减小，巷道围岩应力分布较支护前更加均匀，支护效果良好。 （3）通过现场监测显示，顶板离层量在2~7天后开始出现，最小的离层量为5mm，最大的离层量为30mm，设计最大的离层量为100mm。切眼支护形式的现场实验创造了良好经济、安全及社会效益，设计所取得的成果值得各条件相似矿井借鉴。

With soft coal and compound roof, Zhu Jia he coal mine uses the comprehensive mechanization mining technology, the width of open-of cut is 6.2 metres, the cut cross-section is very large, if we continue to use shed supporting for the large cross-section road, there will be a series of problems,such as big roadway pressure, obvious deformation of sheds,difficult installation of hydraulic supports and long construction cycle and so on, and the mine safety production pressure also increase subsequently. Thus, using combining method of theory design calculation, numerical simulation and field test, we research on supporting technology of large cross-section roadway with soft coal and compound roof in Zhu Jia he coal mine.the conclusions were as following: (1)Adopting limit equilibrium theory and numerical analysis and calculation,we design the combined supporting method of left-handed rebar bolt , metal mesh,metal beam and anchor cable, and calculate the parameters of sopporting. (2)Through numerical simulation, we gain the stability characteristics of large cross-section roadway with supporting,the displacement of roadway roof, roadway floor and two sides of roadway decreases obviously,and the stress distribution of roadway surrounding rock with supporting becomes more uniform, the supporting effect is very good. (3)Through the field monitoring, according to the quantity of roof abscission layer begin in 2 ~ 7 days, the smallest amount of abscission layer is 5 mm, the largest amount of abscission layer of 30 mm, design the largest amount of abscission layer of 100 mm. The field test creates good economic, security and social benefits, furthermore the design results is worthy of reference for the similar mines.