Method for preventing excessive deformation of adjusting roadway at fully mechanized coal mining face retracement stage

Abstract

The invention discloses a method for preventing excessive deformation of an adjusting roadway at a fully mechanized coal mining face retracement stage and belongs to the technical field of coal mining. The problem can be solved that the supporting at an existing fully mechanized coal mining face retracement stage affects the working face advance speed. A certain specification of concrete buttresses are poured in the excavated adjusting roadway in a fixed distance way so as to play a supporting effect on top plates in the adjusting roadway, attention is paid to the vacancy of an outlook space for a supporting position arrangement way, normal outlook hindering is avoided, and supporting is executed after adjusting roadway excavation is completed, so that when a working face advances to the adjusting roadway, the concrete buttresses have certain supporting strength and can be directly cut when a coal cutter passes through, and shutdown for buttress removal is not needed.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a method for preventing excessive deformation of an adjustment roadway during the retraction stage of a fully mechanized mining face. Background technique [0002] As the output of large-scale mines increases year by year, the speed of mining advancement of the working face has been greatly increased, requiring the duration of the fully mechanized mining face to be shortened from about once a year to more than two or three times a year. Therefore, shortening the moving time of fully-mechanized mining face equipment, increasing the succession rate of mining areas and the operating rate of fully-mechanized mining equipment are one of the problems that modern mines must face. [0003] In the 1990s, my country began to introduce foreign advanced complete sets of equipment for quick relocation of fully mechanized mining faces, and combined with advanced multi-chan...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the support in the retraction stage of the existing fully mechanized mining face affects the advancing speed of the working face, and provides a method for preventing excessive deformation of the adjustment roadway in the retracted stage of the fully mechanized mining face, using cutable concrete piles to strengthen the support protection, to avoid a series of slabs and roof fall accidents caused by mining at the end of the mining end, and waste gangue can also be used as one of the materials to play the role of waste recycling. The concrete stack is cuttable and can be cut directly , there is no need for the shearer to stop and wait, which realizes the protection of the adjustment roadway without affecting the normal advancement of the working face

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