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AssigneeChina University of Mining and Technology
InventorsNong ZHANG, Zhengzheng Xie, Junyao Zhou, Qun Wei
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The present invention provides a single-anchor centrally grouted full-length anchored steel wire bundle and a supporting method thereof, which are suitable for use in supporting engineering for the deep dynamic pressure roadway or soft rock roadway. The steel wire bundle consists of parallel steel wires and a central pipe, wherein multiple strands of parallel steel wires are arranged around the central pipe, the central pipe is provided with a slurry output bracket which divides the parallel steel wires into a front part and a rear part, the front part is provided with large stirring jackets, and the rear part is provided with a threaded casing on its tail end. After the coal is cut by a tunneling machine and a roadway is formed, the steel wire bundle is anchored at the ends, and the roadway tunneling speed is increased on a premise of ensuring roadway safety; central grouting is carried out for the steel wire bundle with a pump truck without affecting the quick roadway tunneling, so as to anchor the steel wire bundle in full length and ensure long-time stability of the roadway. The length of the steel wire bundle may be selected according to the geological conditions and the mining environment of the mine, and is not limited by the height of the roadway; the single-anchor centrally grouted supporting method realizes full-length anchoring of the steel wire bundle, and it not only improves the roadway tunneling speed and relieves mining imbalance in the mine, but also solves the problem of large deformation of the roadway.
A single-anchor centrally grouted full-length anchored steel wire bundle, comprising a main body of steel wire bundle and a tray and a nut arranged on a tail end of the main body of steel wire bundle, wherein, the main body of steel wire bundle comprises a central pipe and multiple strands of parallel steel wires which are arranged in parallel around the central pipe and in the same length as the central pipe, the central pipe is provided with a slurry output bracket which divides the main body of steel wire bundle into a front part and a rear part, the front part of the main body of steel wire bundle is provided with a plurality of large stirring jackets, the rear part of the main body of steel wire bundle is provided with a plurality of clamps at intervals, a threaded casing is provided on the tail end of the rear part of the main body of steel wire bundle, a slurry stop plug is provided on the main body of steel wire bundle at the front end of the threaded casing, the threaded casing is divided into a front part and a rear part, the front part of the threaded casing is provided with a plurality of welding grooves II, the rear part of the threaded casing is provided with threads on the outside, and the tray and the nut are arranged on the threads.
Dependencies are inferred from the claim text.