Mine recyclable steel cylinder packing pier column and construction method thereof and method for gob-side entry retaining

Abstract

The invention relates to a mine recyclable steel cylinder packing pier column and a construction method thereof and a method for gob-side entry retaining, which belong to the field of mine laneway support. The steel cylinder packing pier column is a steel cylinder sand and stone packing pier column and consists of a height-adjustable steel cylinder mould and sand and stone packing which is filled in the steel cylinder mould, wherein the sand and stone packing is bulk sand or / and stones which are filled compactly, and also can contain other particulate matters; a filling opening is formed on the top of the steel cylinder mould; a discharging outlet is formed and an openable end cover of the discharging outlet is arranged on the lower part of the steel cylinder mould; two sides of the upper part of the steel cylinder mould are provided with support bases; the pier column is added with water and filled and constructed by a concrete injector; and the steel cylinder mould is taken as an outer wall of the pier column after being filled. The invention also provides a method for recycling the steel cylinder mould of the pier column and a self-advancing pneumatic vibration device. The pier column has a novel and practical structure, is readily available in materials, high in construction efficiency and low in support cost, and is easy to construct; the steel cylinder mould can be recycled for saving steel; and the yielding property of the support of the pier column is greatly improved to ensure that the pier column can meet the requirement that the influence of two-time mining is tolerated by the gob-side entry retaining well and is particularly suitable for the gob-side entry retaining.

Description

technical field [0001] The invention relates to mine roadway support technology, in particular to a mine-used recyclable steel cylinder packing pier column and construction method suitable for the support of gob-side roadway retention in coal mining quasi roadway and a method for gob-side roadway retention. It includes a self-moving wind-driven vibrating device dedicated to the pier construction method. Background technique [0002] In order to reduce the coal pillar loss between the coal mining section transportation and the track trough, no coal pillar mining is adopted, that is, the coal trough is reserved along the goaf to serve the mining face of the next section, which is called gob-side entry retention. Use the laneway. [0003] On December 08, 2010, China's "Invention Patent Bulletin" disclosed an invention application titled "Supporting method for gob-side entry retaining and its entry sliding form", application number: CN 200710015658.X, publication number: CN1019...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing gob-side retaining technology, which is constructed by pouring concrete, the steel cylinder concrete pier column has many steel materials, is not easy to recycle, the support cost is high, and the pressure resistance is poor. The present invention provides a mining recyclable steel cylinder packing pier column and its construction method, as well as the method of applying the mine recyclable steel cylinder packing pier and its construction method to the gob-side entry retention; the steel cylinder packing pier can be recycled and reused, steel is saved, the support cost is low, and the support yields pressure Good performance, can meet the requirements of gob-side entry retention to withstand the impact of two mining operations, and improve the effect of entry retention; the construction method of steel cylinder packing pier columns is simple and practical, and the construction is convenient; it is especially suitable for gob-side entry retention

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