Method of withdrawal passage combined with paste prefabricated blocks to assist working face withdrawal

Abstract

The invention belongs to the field of mining safety and particularly relates to a method of a withdrawal passage combined with paste prefabricated blocks to assist working face withdrawal. The methodcomprises steps that S100, the range of influence of the advanced support pressure is drawn, on the side of a stop line close to a working face, a single-withdrawal channel is excavated through construction, multi-linkage lanes are further excavated, and surrounding rocks are further supported; S200, filling paste is prepared, and filling prefabricated blocks are prepared; S300, preparation of thepaste prefabricated structure is completed; S400, the paste filling prefabricated block support structure is completed; S500, at the end mining stage of the working face, when the withdrawal channelis maintained, net support is carried out to maintain of top plates and coal sides at the end mining stage; S600, a belt conveyor is utilized to send the prefabricated blocks to the rear of a workingface bracket, after transfer, the prefabricated blocks are piled up, the paste is filled, and the paste prefabricated block filling structure is formed; and S700, the steps S500 and S600 are repeatedto complete withdrawal of comprehensive mining equipment. The method is advantaged in that safety, dynamic pressure and rapid withdrawal of the comprehensive mining equipment are achieved.

Description

technical field [0001] The invention belongs to the field of mining safety, and in particular relates to a retraction channel combined with a paste prefabricated block to assist the retraction method of a working face. Background technique [0002] In the mine production process, the succession of the working face is a necessary link. The relocation and reverse of the fully mechanized mining face is an important link for the mine to achieve high production and high efficiency. Productivity. With the enlargement of the scale of the mine, the number of fully-mechanized mining face equipment has also increased, and the improvement of production efficiency has continuously increased the retreat frequency of the working face equipment. Yield and economic benefits are of great significance. After the fully mechanized mining face enters the final mining stage, affected by the advanced bearing pressure generated by mining, the phenomenon of roof fragmentation and side slabs is ser...

AI Technical Summary

Problems solved by technology

The existing withdrawal methods are no pre-excavation withdrawal channel, pre-excavation single withdrawal channel, pre-excavation double withdrawal channel, assisting the withdrawal of the working face at the final mining stage, and no pre-excavation withdrawal channel because of the time it takes to move It is relatively long and is basically no longer used now. The pre-excavation double retraction channel, because of the double retraction channel and the connecting roadway, the excavation workload is relatively large, and at the same time the dynamic pressure is strong in the final mining stage, especially when the roof and floor of the last ten meters of the working face are moved closer. The volume is relatively large, the bottom drum is strong, and the single withdrawal channel is pre-excavated, and the dynamic pressure is relatively strong at the final mining stage. At the same time, the withdrawal can only be withdrawn from both sides to the middle, which is prone to accidents and affects the advancement of the working face.

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