煤柱回收中风桥维护施工的技术应用

Technology Application on the Airbridge Maintenance Construction in Coal Pillars Recovery

煤柱回收时,实体煤柱间存在空巷、风桥,受采动影响破坏加剧。其中的空巷易于维护,而风桥肩负进风、行人之用,上下两巷重叠,应力叠加,整体揭露后,巷道断面和高度加大,难以维护和对风桥煤层进行回收。现通过一例锚、网、梁、工字钢组合人工复合顶板维护的方法,使顶板得到有效加固,对此范围的煤柱进行成功回收。

When coal pillar recycling, has the abandoned roadway and the airbridge between hypostatic coal pillar, destroys aggravatingly by the influence of mining. Its abandoned roadway is easy to maintain, but airbridge shoulders the role of air intake and pedestrian, the up and down two roadways overlaps, the stress superimposes, after the whole expose,the section and the height of the roadway increases, it is difficult that maintenance and recycling of the coal seam of airbridge. Presently through an example of maintenance method as the artificial compound roof of anchor, net, beams, flange beam combination, the roof obtains effective reinforcement, successfully recycles the coal pillar to the scope.