Coal mine roadway supporting method and working face hole-cutting anchor mesh ladder and individual supporting device used by same

Abstract

The invention discloses a coal mine roadway supporting method and a working face hole-cutting anchor mesh ladder and individual supporting device used by the same. The method comprises the following steps of: a, performing hole-cutting construction on one side in advance, and supporting with an anchor mesh ladder; b, after the construction of one side is completed, performing hole-cutting brushing construction to the designed width; before hole-cutting brushing, arranging a hydraulic pump station in a roadway at the end of a cut hole gate; c, supporting a row of individual hydraulic struts for supporting on the coal wall of the brushing side away from one constructed side of a cut hole at the specified position according to the design, supplying liquid to the individual hydraulic struts by adopting a hydraulic pipeline, and supporting a straight hinged top beam at the top of the individuals; and d, after the individuals of the dug side are supported completely, performing hole-cutting brushing, supporting the brushed side by adopting the anchor mesh ladder, and supporting the individuals following a hoeing machine or a development machine. The roadway support comprises an anchor rod, an iron wire mesh and an anchor ladder; the hinged top beam is connected below the iron wire mesh and the anchor ladder in the roadway top support; and a plurality of individuals are connected below the hinged top beam.

Description

technical field [0001] The invention belongs to mine engineering design technology, relates to coal mine mining technology, in particular to a coal mine roadway support method and a working face cutout anchor net ladder plus a single support device. Background technique [0002] Due to the relatively large span (7m--8.2m wide, 2.8m-3.5m high) of the cut-outs in the working faces of coal mines, the composite support of anchor net ladder + shed is usually used (as shown in the figure). Its support method: the roof support adopts left-handed threaded steel anchor rods, the specification is ∮18×2400mm, and the row spacing is 800×1000mm. There are 6 roof anchor rods per row on each side, and 8# iron wire diamond mesh is laid on the top. The size of the sheet is 4500×900mm, the specification of the anchor ladder is 3700×60mm (5 holes), and it is welded by round steel with a diameter of 14. The two sides are supported by bamboo anchors with a length of 1600mm. , 3 in each row, the...

AI Technical Summary

Problems solved by technology

Its support method: the roof support adopts left-handed threaded steel anchor rods, the specification is ∮18×2400mm, and the row spacing is 800×1000mm. There are 6 roof anchor rods per row on each side, and 8# iron wire diamond mesh is laid on the top. The size of the sheet is 4500×900mm, the specification of the anchor ladder is 3700×60mm (5 holes), and it is welded by round steel with a diameter of 14. The two sides are supported by bamboo anchors with a length of 1600mm. , 3 in each row, the first anchor on the side is arranged at a distance of 500mm from the shoulder socket, each bamboo anchor uses two cement rolls for end anchoring, and the side is supported by a polymer net to the bottom of the bamboo anchor. At the pallet, the size of the wooden pallet is 400×250×50mm; in addition, 11# mine-used I-steel shed composite support is erected, the support process is complicated, the support cost is high, the labor intensity of the staff support is high, and the excavation level is single. Low

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