A coal pillar in the goaf and the transition section below the roof supporting method, first of all to the roof of the tunnel bottom head-on direction parallel to the axis of Roadway Drilling, with circular steel tube inserted in the borehole, and the wedge, the formation of advanced temporary support; a tunneling footage, laying a metal net and steel strip, the strip close to the roof, and roof by steel hole drilling, in turn the hydraulic expansion bolt into the drill hole, and then to the hydraulic expansion bolt inject high-pressure water, whenever the roadway tunneling after a certain distance, in the head at the bottom of the roadway roof is parallel to the axial direction of the tunnel drilling, inserted round steel tube, and the roof of the tunnel support until the completion of the coal pillar in the goaf and the transition section below. The utility model is especially suitable for the roadway roof support under the condition of extremely thin layer spacing and lower coal seam driving face through the junction of the overlying coal pillar and the goaf, and is also applicable to the roadway roof support of the driving working face through the fault and the carbon pillar without crossing. The method is simple, easy to operate and good in supporting effect.
【技术实现步骤摘要】
【技术保护点】
１． 一种煤柱与采空区过渡段下方巷道顶板支护方法，其特征在于包括如下步骤：ａ．首先向煤柱与采空区过渡段下方巷道顶板底部平行于巷道轴线方向间隔施工深度为３０００ｍｍ的钻孔，钻孔的间距为１５０～２００ｍｍ；ｂ．用与钻孔直径和深度相匹配的圆钢管（１）插入施工好的钻孔内，并通过楔块将圆钢管（１）楔紧，形成超前临时支护；ｃ．在超前临时支护作用下，在巷道内向前掘进一个进尺；ｄ．对掘进出的巷道顶板铺设金属网，以排距的形式，先用一条布有孔径与水力膨胀锚杆（２）直径相配合的钢带（４）托住金属网，并通过单体液压支柱将钢带（４）顶住；ｅ．依次从钢带（４）的孔口向巷道顶板打眼钻孔，钻孔的孔深与水力膨胀锚杆（２）长度相匹配；ｆ．依次将水力膨胀锚杆（２）装入钻孔内，并通过水力膨胀锚杆（２）的托盘使钢带贴紧顶板；ｇ．利用注液连接器逐个向水力膨胀锚杆（２）内注入压力为２０～２２ＭＰａ水，注液时间不少于２ｍｉｎ；ｈ．进行下一个进尺的掘进，重复上述步骤ｄ、ｅ、ｆ、ｇ，进行下一排距的水力膨胀锚杆（２）的安装；ｊ．巷道每向前掘进２．０～２．１ｍ后，在巷道顶板底部平行于巷道轴线方向施工续接圆钢管（１）的钻孔，安装续接圆钢管（１...
【技术特征摘要】
【专利技术属性】
技术研发人员：柏建彪，冯伟，王襄禹，徐营，王元明，
申请(专利权)人：中国矿业大学，
类型：发明
国别省市：32
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