Shandong Energy Group Co. , Ltd.
School of Qilu Transportation, Shandong University

为有效控制深部煤矿大断面托顶煤巷道围岩变形,设计研发了π型支护钢梁、拱架支护结构以及锚索梁支护体系,采用数值模拟、室内试验、工程应用等手段验证了高强度支护构件的可行性。结果表明:垂直荷载下,π型钢变形量略大于U29型钢,但变形量均在工程现场允许范围内;倾斜荷载下,π型钢抗变形能力较强,荷载倾斜10°时,π型钢梁变形量基本不变,U29变形增幅超230%。相同荷载加载条件下,拱架变形量与拱架高度及宽度呈正相关,垂直荷载对拱架变形影响最大,且受力越均匀,拱架变形越小;四段式与五段式拱架的可缩性能远高于三段式拱架,拱腿处设置节点,更有利于拱架的整体让压,安全性更好。高强度支护构件现场应用效果良好,验证了其可行性。

To effectively control the surrounding rock deformation in large section top coal roadway of deep coal mines, π-shape support steel beams, arch support structures, and anchor cable beam support systems are designed and developed. The feasibility of high - strength support components is verified through numerical simulation, lab testing and engineering application. The results show that under vertical load, the deformation of π-shape steel is slightly greater than that of U29 shaped steel, but the deformation is within the allowable range of the engineering site. Under inclined loads, π-shape steel has strong deformation resistance. When the load is inclined at 10°, the deformation of π-shape steel beams generally remains stable, while the deformation of U29 increases by more than 230%. Under the same loading conditions, the deformation of the arch frame is positively correlated with the height and width of the arch frame. Vertical loads have the greatest impact on arch frame deformation, and the more evenly stress on frame, the smaller deformation on frame. The scalable performance of the four-section and five-section arches is much higher than that of three -section arches. Setting nodes at arch legs is more conducive to the overall compression of arches and provides better safety. The on-site application effect of high-strength support components is favorable and the feasibility is verified.

高乐,郭晓胜,刘勋,等.大断面托顶煤巷道高强度支护结构设计与应用[J].煤炭工程,2024,56(12):38-45.