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中文摘要：
为了研究采空区下方综采工作面切眼支护技术,针对北峪煤矿3-101综采工作面切眼宽6.5 m、顶板距上层煤采空区最小只有0.8 m且被采空区积水浸泡软化等特点,依据工程类比法提出,采用W钢带与长2.5 m的水力膨胀锚杆组合支护采空区下方工作面切眼顶板,锚杆间距750mm,排距500~700 mm,两帮可不进行支护。该技术在现场实施后,切眼顶底板相对移近量最大75 mm,有效地解决了采空区下极近距离综采工作面切眼顶板支护问题。
英文摘要：
In order to study the roof support technology of the open-off cut for the fully mechanized coal mining face under the goaf,according to the 6.5 m width open-off cut of No.3-101 fully mechanized coal mining face in Beiyu Mine,a face roof distance of 0.8 m to above seam goaf and the watery softened floor features of the above goaf,based on the engineering analogy,the W-type steel bands and the 2.5 m long hydraulic swelling anchors were applied to the combined support of the open-off cut of the coal mining face under the above seam goaf.The space between the bolts was 750 mm and the row space between the bolts was 500~700 mm.The two side walls of the open-off cut could not be supported.After the combined roof support technology applied to the site operation,the max relative convergence between the roof and floor of the open-off cut was 75 mm.Thus the roof support problem of the open-off cut for the fully mechanized coal mining face with a extreme short distance to the above seam goaf was effectively solved.
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