A concrete modular gob-side roadway support structure for coal pillar-free mining

Abstract

The invention discloses a concrete modular gob-side roadway support structure for mining without coal pillars, which belongs to the technical field of mineral resource mining; on the basis of the technology of flexible mold concrete gob-side roadway retention, a concrete modular gobside roadway for mining without coal pillars is proposed. Empty roadway support structure, the concrete modular wall consists of three parts: the upper roof unloading module, the middle wall layer module, and the lower foundation module, wherein the roof unloading module includes the roofing intermediate concrete module and the roofing concrete module 1. A concrete module connected to the roof gap, the top surface of the wall layer module is provided with a plurality of strip-shaped semicircular protrusions and semicircular grooves to prevent the module from sliding; The number of excavated roadways reduces the cost of roadway maintenance, and the modular concrete can be recycled and reused, which greatly reduces the support production cost.

Description

Technical field [0001] The present invention relates to a coal-free collapsed concrete modular along empty-forming road support structure, which belongs to the technical field of mineral resources mining. Background technique [0002] At present, most coal mines have been close to the depletion, and the valuable coal resources have not achieved full use. The resource recovery rate in the mine is more than 65%, and the actual return rate of the coal mining surface is also maintained at a lower level. 80%; one-time highlight is limited to the mine of medium and thick coal seams with good coal mining machinery, and the amount of mine damage of equipment is more serious. Each coal mining surface should be a large amount of security coal columns, and mineral resources cannot achieve full use. [0003] In 2002, Professor Wang Xiaoli, Xi'an University of Science and Technology, developed successfully soft molding of concrete, along the air, inserted by a disposable fiber flexible templa...

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Problems solved by technology

[0005] The present invention overcomes the deficiencies of the prior art, and proposes a concrete modular gob-side entry support structure for mining without coal pillars. It is very easy to leak grout, high labor intensity, concrete pouring time, long concrete solidification time, wall not connected to the top and low work efficiency and other problems

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