Method for controlling gas of mountain angle and worked-out section by one-in one-out and alternate tail lane ventilation mode

Abstract

The invention provides a method which disposes gases at corners and goaf by a one-intake one-return staggered tail tunnel ventilation type, which solves the problem that a plurality of gases are accumulated at the air return corners. The invention is characterized in that a working face air inlet tunnel and an air return tunnel are arranged along the soleplate of no. 15 coal; the staggered tail tunnel is arranged along the top plate of the no. 15 coal, which has the horizontal distance of 10-15m with the air return tunnel generally; a wind absorbing port extends at least more than 5m into a coal wall along the goaf direction, namely, the wind absorbing port is lagged by more than 5m compared with the stope air return port of the fully mechanised working face; the wind absorbing port is vertically higher than the soleplate of the stope space of the working face by nearly 5m, which is arranged at the upper wind side of the mechanised working face wind return corner and also at the top layer of the no. 15 coal layer; the wind inlet gateway and the wind return gateway are arranged along the soleplate of the coal layer and are supported by an iron shed, with the profile of 9m2; the staggered tail tunnel has 10m away from the wind return gateway horizontally, is arranged along the top plate of the no. 15 coal layer, and supported by anchors with the tunnel profile of 8m<2>; the invention has the advantages of convenient construction, safety and reliability, convenient management, low cost and obvious effect. The invention is especially suitable for gas disposal of coal mine.

Description

Technical field: [0001] The invention belongs to the technical field of coal mine gas control, and in particular relates to a method for controlling gas in Luoshanjiao and goafs through a ventilation mode of one entry and one return plus internal cross-tail lanes. Background technique: [0002] As far as the inventor knows, the current gas control technology for fully mechanized top-coal caving working faces initially adopts a one-inlet-one-return ventilation system. The ventilation system, extraction fan, and mobile pumping station of the outer staggered tail alley were added back to solve the gas problem in Luoshanjiao. The experimental research and promotion and application show that the reverse pressure regulation between layers has been clearly ordered in view of the impact on spontaneous combustion. Prohibited, the positive pressure regulation is limited by the underground conditions, and it is not universal to promote. One entry and one return plus external staggered ...

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Problems solved by technology

[0002] As far as the inventor knows, the current gas control technology for fully mechanized top-coal caving working faces initially adopts a one-inlet-one-return ventilation system. The ventilation system, extraction fan, and mobile pumping station of the outer staggered tail alley were added back to solve the gas problem in Luoshanjiao. The experimental research and promotion and application show that the reverse pressure regulation between layers has been clearly ordered in view of the impact on spontaneous combustion. Prohibited, the positive pressure regulation is limited by the underground conditions, and it is not universal to promote. One entry and one return plus external staggered tail alley ventilation has a great impact on spontaneous combustion, and the maintenance of the tail alley is difficult, resulting in unsmooth extraction systems, etc. The extraction type is adopted Although the fans and mobile pumping stations have solved their own unsafe factors well, and have achieved good results in solving the gas problem at Luoshanjiao, there is still the problem that the return airway pipeline is easily squeezed by the tail of the transport plane in the front and rear of the work. The operation of fans and pump stations is affected by human factors, and the management is relatively difficult.

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