Construction technology of large-inclined-angle and large-mining-height fully-mechanized coal mining equipment passing through geological-structured fracture zone

Abstract

The invention discloses a construction technology of large-inclined-angle and large-mining-height fully-mechanized coal mining equipment passing through a geological-structured fracture zone, relating to the field of coal mining technology. The construction technology is suitable for a fracture zone and comprises the procedures of cutting coal, transferring a hydraulic support and pushing a scraper conveyer, wherein the grouting reinforcement procedure of a coal wall and a top plate is carried out before coal cutting and particularly comprises the steps of drilling out grouting holes in the coal wall and the top plate of an return airway and a transportation roadway of the geological-structured fracture zone, wherein the grouting holes penetrate through the fracture zone; filling bi-component soluble silicate resin into the grounding hole, wherein the bi-component soluble silicate resin is permeated into gaps with widths of more than 0.14mm in the coal wall and the top plate and can bond the fracture zone after being solidified in short time. The construction technology can prevent roof caving and wall caving phenomena during coal mining in the fracture zone to the maximum extent.

Description

technical field [0001] The invention relates to the field of coal mining technology, in particular to a construction technology for fully mechanized mining equipment with a large inclination angle and a large mining height to pass through the broken zone of the geological structure. Background technique [0002] At present, in the actual production of the applicant, ZQY3400 / 15 / 35 hydraulic supports are used for mining in medium and thick coal seams. The maximum support height of the supports is only 3.5m. 1.5-2.0m high-quality coal cannot be recycled, and the waste is very serious. When the bottom coal is mined along the roof, the roof often falls before the frame; if the bottom coal is lost, it is easy to cause the frame to drill the bottom, it is difficult to push the frame, and it is difficult to increase the yield level. The Huashan Mine has also carried out a test of fully mechanized top coal caving mining at large dip angles, but due to factors such as lack of experie...

AI Technical Summary

Problems solved by technology

It is proposed to use a one-time mining full-height test on the mining face. The biggest difficulty encountered in the mining process is that the roof of the roof is prone to occur when passing through the geological fracture zone, and this will cause the deterioration of the support state, and the support is prone to squeeze, bite and fall. It is difficult to slide and move the frame, causing the working face to fail to recover normally

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