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综采工作面切眼支护是掘进支护工作的一道难题。铜川矿务局王石川矿在293综采工作面切眼施工时,采用锚杆与工字钢联合支护、导洞法施工。由于巷道设计高度(2.7m)和宽度(5.5m)构成的矩形断面较大(15m~2),加之地质条件变化复杂,使掘进施工和支护十分困难,以致于顶板离层断裂、支架变形损坏,造成冒顶、感胁安全,严重影响掘进及安
Full-mechanized mining face cutting support is a difficult problem in tunneling support work. Tongchuan Mining Bureau Wang Ishikawa 303 fully mechanized mining face cut eye construction, the use of bolt and I-beam joint support, guide tunnel construction. Due to the large rectangular section (15m ~ 2) formed by the design height (2.7m) and the width (5.5m) of the roadway, complicated geological conditions have made it difficult for tunneling construction and support so that the roof delaminates and the bracket deforms Damaged, causing the roof fall, threatening the safety and seriously affecting the tunneling and safety