The results show the combined roof trusses has a practical support effect in coal roadway.

研究表明组合桁架锚杆对煤巷具有良好的支护效果.

Practice showed that high pre-stress anchored bolt with high strength was effective method for controlling deformation of deep coal roadway with combined roof above gob.

实践证明，高预应力高强锚杆组合的围岩强化控制技术是控制深井厚复合顶板采空区上方煤巷围岩变形的有效方法。