Side-supporting roadway forming method by pre-digging guide cavern and filling with artificial side wall for secondary use

Abstract

The invention discloses a side-supporting roadway forming method by pre-digging a guide cavern and filling with an artificial side wall for secondary use. Firstly, the guide cavern is dug in advance before mining roadway construction, and filling is performed to form the artificial side wall; then mining roadways are constructed in sequence respectively along two sides of the artificial side wall, and are filled with the artificial side wall which serves as a side support of the two mining roadways for mining of two working faces. Compared with a gob-side entry retaining technology in existing coal pillar-free roadway protection technologies, the side-supporting roadway forming method has the advantages that the mining roadways are directly caved without maintenance, the percentage reduction of area is small, and the method is also applicable under the complex conditions such as high seam full-mechanized caving mining and deep-part high-stress seam mining; the pre-dug guide cavern is used for filling, during filling, two sides of the guide cavern are both solid coal, and two side templates are not needed during filling, so the process is simple and the construction speed is high.

Description

technical field [0001] The invention relates to the coal mine roadway protection technology without coal pillars. Background technique [0002] The coal pillar-free roadway protection technology is an important development direction of coal mining technology. It can not only reduce the waste of coal resources, improve the resource recovery rate, but also eliminate the stress concentration phenomenon caused by leaving coal pillars. Dynamic disasters such as coal and gas outbursts are very beneficial, and at the same time, they also play an important role in the sustainable development of mines and the realization of green mining. [0003] At present, there are two main types of coal pillar-free roadway protection technology: gob-side entry retention and gob-side entry entry. [0004] The so-called gob-side roadway retention technology refers to the use of support materials along the edge of the gob to maintain the original mining roadway during coal mining, and the original ...

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Problems solved by technology

[0011] In order to overcome the shortcomings of difficult roadway maintenance, large section shrinkage, slow coal mining speed, poor support effect and air leakage in the goaf in the technology of roadway protection without coal pillars, the present invention provides a secondary recovery method for pre-excavation pilot tunnel filling with artificial sides. The method of forming a road with roadside support

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