Method for arranging roadways on coal-pillar-free stope

Abstract

The invention discloses a method for arranging roadways on a coal-pillar-free stope. Particularly, the method comprises the following steps: two roadways are arranged on each working face, one is an excavating roadway, and the other is a gob-side retained or excavated roadway on an upper working face; before a present working face is stopped, a roadway and a cut are excavated in advance on a supersedure working face adjacent to the present working face; the cut is connected with the excavating roadway of the present working face; and the excavating roadway and the cut of the supersedure working face serve as the boundary return airway of the present working face during gob-side roadway retaining, and serve as the construction pathway for the gob-side excavated roadway during gob-side entry driving. Therefore, through the adoption of the method, mining without coal pillars is achieved and a two-in and one-out Y+L type ventilation system is formed. In the method, the excavating roadway and the cut of the supersedure working face serve as the return airway of the present working face and one roadway of the supersedure working face, thereby achieving dual purposes and eliminating the excavating of a roadway; and a pressure peak area is avoided, so that more coal pillars can be extracted, the problem of transfinite methane gas is solved, the excavation tight relationship is relieved, and the method can be widely applied to coal mines, metallurgic mines and other industries.

Description

technical field [0001] The invention relates to a roadway layout method of a mining face, in particular to a roadway layout method of a non-coal pillar mining face. Background technique [0002] There are generally two types of roadway layout in the traditional coal pillar recovery working face: one is to arrange two roadways, one transportation roadway and one air return roadway; the other is to arrange three roadways, namely the air return roadway, transportation roadway and auxiliary transportation roadway ; There are return air lanes, transport lanes and gas tail lanes for the high gas coal pillar working face. After coal pillar-free mining is realized, there are generally two mining working faces, one of which is gob-side reserved roadway or gob-side excavated roadway. For high-gas mines, a return airway must be set at the boundary when gob-side roadway is retained, forming a "Y "type ventilation, which increases the engineering volume of excavating a boundary return a...

AI Technical Summary

Problems solved by technology

After coal pillar-free mining is realized, there are generally two mining working faces, one of which is a gob-side reserved roadway or gob-side excavated roadway. For high-gas mines, a return airway must be set at the boundary when the gob-side roadway is retained, forming a "Y "type ventilation, which increases the engineering volume of tunneling a boundary return airway, and correspondingly increases the preparation time of the working face; tunneling along the goaf needs to be carried out after the mining of the working face is completed and the roof of the goaf has stabilized. More than one year, seriously affecting the mining continuity

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