RU1802165C - Method for catching methane in extraction district - Google Patents

Abstract

Usage: development of methane-bearing coal seams. SUMMARY OF THE INVENTION; In the rocks of the year of development of the developed formation, capturing is carried out, from which degassing wells are drilled to the developed formation. Additionally, shielding wells, which are also used for capturing methane, are drilled from the capture production. 2 ill.

Description

The invention relates to coal mining | and can be used in the development of methane-bearing coal plafs,

{An object of the invention is to increase the degassing efficiency of the developed formation and the produced coal-bearing stratum, preservation of the capture production after the passage of lava, and also the expansion of the scope of the method.

(In Fig. 1, two excavation sections are shown in the plane of the reservoir being developed, one of which is being developed as a continuous system (a, on the right), and the other as a pole system - {b, on the left), and the outgoing jet is discharged from the localized capturing mine in in one case. to the main drainage production (a, to the right), and in the other to the general mine ventilation network (b, to the left); in FIG. 2 - a vertical section along the axis of the captive workings.

(The aid is carried out as follows.

Site preparation is carried out by three main openings: air supply 1, ventilation 2. drainage 3

and three precinct workings - two air supply 4 and captive 5.

Air supply workings 4 are conducted along the formation being developed, capturing 5 is carried out in the soil of the formation and is knocked off with the working formation using gesenk or wells 6. Shielding wells 7 are drilled from the production workout along the bedding and parallel to the overburden line.

The main ventilation fan - 8. pumps air into the shaft, which enters the extraction section through the main 1 and local air supply openings. After washing off the bottom-hole space of the lava 9, the outgoing air stream enriched in methane and other media (coal dust, heat) released in the bottom-hole and mined-out space through the steam generators. (Boreholes) 6 are directed to the localized bottom hole 5, where it is further enriched methane, captivated by shielding wells 7 from the developed seam and the mined coal mass, and through chesenki 10 are sent to the main capture work 3, and then by special

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The barrel of the well (borehole) 11 to the surface. On the surface, the methane-air mixture discharged from the charge is accumulated in the gas holders 12 for subsequent disposal.

Compared with the prototype method, the claimed method has the following advantages,

1. The area of the capture production is generated after the passage of the lava, which allows the method to be applied when mining the areas with a continuous development system, and to expand the scope of the method.

 2. The preservation of capture production after the passage of the lava and the use of shielding wells drilled from it allows:.

capturing methane from the bottom-hole zone of the developed formation in the area of lowering the reference pressure;

to capture methane from the coal seam under development, the unloading of which from the rock pressure occurs at a distance from the treatment line of the developed formation,

The claimed method significantly expands the learning capabilities

runoff capturing production due not only to capturing methane released in the bottomhole and mined-out spaces, but also to preliminary acknowledging methane from the developed formation and the produced coal-bearing thickness.

Claims (1)

The claims A method of capturing methane in a mining section, including carrying out capturing production in the host rocks of a developed formation, drilling degassing wells therefrom into a developing formation, and isolated methane removal from the capturing production to a surface, characterized in that, in order to increase the degassing efficiency of the developing formation and the coal producing strata due to the preservation of the capture production after the passage of the lava, the production of the capture is carried out in the soil of the developed layer, while Shielding wells are drilled additionally through which additional methane is captured. A-l fie. 2