A kind of pre-excavation two-way forward solid filling coal mining method

Abstract

A solid-filling coal mining method with two pre-excavated tunnels for advancing. A mining roadway adopts an arrangement mode that the pre-excavated tunnels are taken as air return and inlet roadways and a gob-side entry retaining roadway is taken as a roadway for transporting filling materials and coal; coal extraction and gob backfilling are carried out by a comprehensive mechanical solid-filling coal mining process; and a coal mining method that a mining sequence is propelled by making a filling coal mining working face be back to the direction of transporting the coal to a mountain in a mining area is used. The pre-excavated tunnels are formed, by tunneling, before the extraction of the working face, and the gob-side entry retaining roadway is formed by optimally designed filling bodies beside the roadway along with the implementation of advancing filling coal mining operation along the working face. The coal mining method is simple in process, technically and completely realizes coal milling without pillars, and achieves high coal resource extraction rate. The coal mining method can not only solve the technical problems that a draw-back-type down-mining and up-filling working face cannot ensure a filling effect during a filling milling process of a mine with shortage of resources, but also materialize the comprehensive mechanical solid-filling coal mining of mines with limited geological conditions by virtue of an advancing up-milling and down-filling working face.

Description

technical field [0001] The invention relates to a coal mine pre-excavation two-lane advancing solid filling coal mining method, which is especially suitable for comprehensive mechanized solid filling mining near horizontal medium-thick coal seam without coal pillars and gobside entry retaining working face. Background technique [0002] Comprehensive mechanized solid material filling coal mining technology is a revolutionary technology of filling mining technology. Since its research and development, this technology has been used in Pingdingshan (under villages), Jining (under dense villages), Yanzhou (under large river embankments) in my country. More than 20 working faces in more than 10 mining areas such as Anhui, Anhui (under the four water bodies), and Kailuan (under the railway network) have been extensively industrialized. This technology is improving the recovery rate of coal resources; using solid materials in the mining area and protecting the mining area With outsta...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the solid filling coal mining equipment and the filling technology itself, the filling technology has certain limitations on the adaptability of the coal seam dip angle change, and it is required that the solid filling coal mining face should be mined and filled as much as possible (inclined coal mining, inclined Filling) layout, so under specific geological conditions, the application of filling technology encounters challenges

Under normal circumstances, the comprehensive mechanized coal mining face is arranged in a retreating manner, advancing along the boundary of the section in the direction of transporting uphill (or uphill on the track). When arranging and filling the coal mining face, the application effect of the filling technology cannot be guaranteed

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