Coal-pillar-free mining concrete modular gob-side entry forming supporting structure

Abstract

The invention discloses a coal-pillar-free mining concrete modular gob-side entry forming supporting structure, and belongs to the technical field of mineral resource mining. The coal-pillar-free mining concrete modular gob-side entry forming supporting structure is provided on the basis of a flexible formwork concrete gob-side entry retaining technology, and a concrete modular wall is composed ofthree parts including an upper-layer roof-contacting unloading module, a middle wall layer module and a lower-layer foundation module, wherein the roof-contacting unloading module comprises a roof-contacting middle concrete module, a roof-contacting concrete module and a roof-contacting gap concrete module, and the top surface of the wall body layer module is provided with a plurality of strip-shaped semicircular bulges and semicircular grooves to prevent the module from sliding. According to the coal-pillar-free mining concrete modular gob-side entry forming supporting structure, coal-pillar-free mining of a whole well field can be achieved, the number of tunneled roadways can be reduced, the roadway maintenance cost can be reduced, modular concrete can be recycled, and the supporting production cost is greatly reduced.

Description

technical field [0001] The invention relates to a concrete modular gob-side roadway support structure for mining without coal pillars, and belongs to the technical field of mining resources. Background technique [0002] At present, most coal mines are close to depletion, and the precious coal resources have not been fully utilized. The theoretical resource recovery rate in the underground mining area of ​​each mine is above 65%, and the actual recovery rate of the coal mining face is still maintained at a relatively low level, and the mining of top coal is insufficient. 80%; One-time full-height mining is also limited to mines with good coal mining machinery and medium-thick coal seams, and coal loss in mines with poor equipment is even more serious. A large number of security coal pillars must be left in each coal mining face, and the mineral resources cannot be fully utilized. [0003] In 2002, Professor Wang Xiaoli of Xi'an University of Science and Technology successfu...

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