RU2549659C1 - Method of abandonment of methane saturated mine - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method of extraction of methane during abandonment of methane saturated mine comprising the termination of coal mining in a working face, isolation of local sections, execution and sealing of wellheads, connection of wells to a vent pipeline and methane extraction is offered. The wells are made from mining near break-down chamber over coal block into free space of the broken-down rocks of the main roof of the stopped working face, wells connect to the main vent pipeline and methane extract before isolation of local developments and after isolation of mine.

EFFECT: increase of time of operation of vent wells and increase of volumes of extracted methane suitable for utilisation.

Description

The invention relates to mining, mainly to the coal industry, and can be used to extract mine methane during and after the liquidation of methane mine.

There is a known method of liquidating a methane-rich mine, including the cessation of coal mining, extraction of methane from the produced space through wells and isolation of quenched mine workings (Instructions for the degassing of coal mines. Series 05. Issue 22. - M .: Scientific and Technical Center for Research of Problems industrial safety ”, 2012. - 250 p.).

The disadvantage of this method is that methane is extracted from the produced space through the district wells for a short time in connection with the repayment and isolation of the output.

A known method of liquidating a methane-rich mine, including the cessation of coal mining, methane extraction and isolation of the mined-out space (Estimating the resources and volumes of methane extraction in underground mining of Russian coal deposits / A.D. Ruban, BC Zaburdyaev. - M .: IPKON RAS, 2005 . - 152 p.).

The disadvantage of this method is that the extraction of methane from the produced space is carried out through the district wells, which operate for a short time due to the repayment and isolation of the district workings.

The closest way is a method that includes stopping coal mining, extracting methane, disconnecting local wells and pipelines from the vacuum system and isolating repayable workings (Methodological principles for the design of degassing in existing and abandoned mines / V.S. Zaburdyaev, A.D. Ruban G.S. Zaburdyaev et al. - M.: NSC GP-IGD named after A.A. Skochinsky, 2002 .-- 316 p.).

And this method has drawbacks due to the fact that the extraction of methane from the mined-out space of the left face is carried out for a short time, since the degassing wells operating in the extraction section are disconnected from the mine’s vacuum system in the process of extinguishing and isolating the local output.

The aim of the new technological solution is the optimal location of degassing wells, which ensures the duration of the well and increase the amount of recoverable methane suitable for disposal.

The object of the invention is achieved in that in a method for liquidating a methane-rich mine, including terminating coal mining operations, extracting methane, disconnecting district wells, a pipeline and isolating quenched workings, into the free space of collapsed rock of the roof of a stopped working face from a mine working near the dismantling the chambers above the whole coal drill wells, seal their mouths from the mine atmosphere and connect to the main degassing pipeline with its output and the surface and communication with a vacuum degassing installation.

The method is as follows.

At a methane-rich coal mine planned to be liquidated, the volumes of coal mined and methane emissions are measured until the coal mining operations are stopped, and after stopping the treatment faces, the methane emissions from degassing wells operating in the extraction site are measured until they are disconnected from the underground vacuum network and the district production is extinguished .

In order to extract mine methane from a mine prepared for liquidation after issuing the main equipment from the mine near the dismantling chamber, entirely over coal is drilled into the free space of the collapsed rocks of the roof of the stopped mine face, their mouths are sealed from the mine atmosphere and connected to the main degassing pipeline with a conclusion it to the surface and in communication with a vacuum degassing installation. As the main degassing pipeline, degassing pipes laid along the bore or specially equipped wells can be used in accordance with the provisions of the Coal Mines Degassing Instructions, and as a vacuum degassing installation, a stationary or mobile ground-based vacuum pump station (ANS or PN VIS) .

Methane extracted from the mine is supplied to the consumer.

The rules for measuring the volume of captive methane, the operation of the equipment of the vacuum pump station and pipelines are carried out in accordance with the provisions of the regulatory document and passports for the equipment and control equipment of both the vacuum pump station and the consumer of the extracted methane from the closed mine.

The implementation of the method will allow for a long time to extract methane suitable for disposal from a closed mine, which will help to protect the environment from uncontrolled penetration of methane to the surface, to obtain an additional economic and environmental effect.

Claims (1)

A method for extracting methane during the liquidation of a methane-rich mine, including the termination of coal mining in the working face, isolation of local workings, conducting and sealing wellheads, connecting wells to a degassing pipeline, and extracting methane, characterized in that the wells are carried out from a mine near the dismantling chamber above the whole coal into the free space of the collapsed rocks of the main roof of the stopped working face, the wells are connected to the main degassing pipeline and methane is extracted hitch before isolation of local workings and after isolation of the mine.