The utility model discloses a lower closely coal road supporting construction of coal mine goaf, the roof of coal road and two help to adopt stock class supporting construction, the stock adopts the high pretightning force stock that excels in, and high pretightning force stock becomes a complete combination beam with top of roadway coal and roof rock improvement through excelling in, every still arranges horizontal joist and the anchor rope more than two on strutting sectional roof at the coal road, and is taut with the joist through the anchor rope to to consolidate the combination beam that forms by the high pretightning force stock that excels in suspends in midair. The utility model discloses anchor bolt support can prevent the loose inbreak in roof rock stratum effectively, can receive that the exploitation influence of upper portion coal seam, integrality receive the upper portion coal seam of certain destruction degree or the stress -released zone rock improvement that falls for collapsing after the exploitation of coal seam becomes a complete combination beam with oneself, and rethread anchor rope steel channel beam's the effect of suspending in midair, it is less to make lower part coal seam exploitation in -process roof structure change, avoids appearing great rock pressure, the integrality of assurance lower part heading.