SU1731950A1 - Method of unmanned mining in gas-bearing coal seam - Google Patents

Abstract

The invention relates to the coal industry and makes it possible to increase the safety of mining operations by preventing the separation of an inert gaseous medium (IG), as well as the efficiency of selection of associated energy carriers and their utilization. The coal gas-bearing formation is opened by mine workings 1 and 2. The extraction unit (WB) is prepared for ventilation 5 and for hauling 6 workings. A split furnace 7 is conducted in VB and the cleaning equipment is mounted therein. Sealed jumpers and sluice devices 8 and 9 are installed on the haulage and ventilation workings. A mine workout 10 is additionally passed between the development workings. A closed loop of an isolated space (IPPC) is formed in the WB. The isolated space is filled with an inert gaseous medium. From the mine workings are carried out diverting production 16. In the process of working out In B, a forced circulation of IGS is created in the SKIPE. Stir up the IGS in all the IPPC. Along with cleaning works from IGS, excess methane, coal dust and methane are being taken. Their transportation for disposal is carried out in a diversion mine. 1 il. cl

Description

The invention relates to the coal industry and can be used in the development of coal gas bearing layers by underground mining in order to increase the safety and efficiency of coal production.

There is a method of underground mining of coal gas-bearing layers, which includes a set of works on the opening of seams, mining preparation, installation and commissioning and operational works, as well as work on creating safe conditions due to the mine’s mine’s mining, complex degassing of methane sources, dust control and increased temperature of the mine atmosphere.

The disadvantage of this method is that the work on creating safe working conditions is very energy- and labor-intensive, economically high-cost, and technologically does not exclude the negative influence of the gas factor on the safety and intensity of maintenance work.

Closest to the proposed method of developing gas-bearing coal seams in insulated from common mine

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Atmosphere of the space filled with inert methane medium, except for work on opening and preparation of the reservoir for operation, includes work on isolating the existing workings of the excavation block by installing sealed bridges and lock devices, creating an inert gaseous medium in an isolated space and maintaining works

The disadvantage of this method is that the inert methane medium within the isolated space of the excavation block is in a stationary state, which is the reason for its possible stratification and the occurrence of local zones and layers with a fire-explosive concentration of methane and oxygen, contributes to dust accumulation. in the clearing bottom and adjacent workings and intensive temperature increase inside the isolated extraction block.

The purpose of the invention is to increase the safety of mining operations by creating a forced circulation of an inert gas environment, which prevents stratification of the medium and the occurrence of local zones and layers with a fire-explosive concentration of methane and oxygen, dust accumulation and an intense temperature rise in the extraction block, as well as efficient selection of associated energy carriers - methane, dust, heat for their utilization.

To achieve this goal, between the haulage and ventilation openings of the excavation unit, additional excavation is carried out, which forms a closed loop of the insulated space, and diverting development is conducted from this excavation. In the process of working the unit in an isolated closed loop, the inert gaseous medium is forced to circulate and mixed, and excess methane, dust and heat are taken from the inert medium, which are discharged through the discharge generation for their further utilization.

The described implementation of the proposed method will prevent stratification of the inert gaseous medium and the occurrence of local fire-hazardous zones and layers, accumulation of dust in the clearing bottom and adjacent workings and temperature rise in the isolated space of the excavation block, dust and heat for disposal. The combination of the signs that forced circulation and mixing of an inert medium throughout the contour levels and levels are created in a closed loop of insulated working mines, and the sign of mine working from the beginning of the contour of the isolated space to the end of the contour, thus closing the circuit, and the placement of the fan installation and devices for the selection of gas, dust and heat in this development is new.

The drawing shows a schematic diagram of the workings of an isolated production unit and special chambers.

The method is implemented as follows. In the excavation block, mine workings 1 and 2 are opened, revealing the coal-bearing gas reservoir, and a system of workings preparing the bed for mining, including inclined workings 3 and 4, horizontal haulage and ventilation workings 5 and 6, split furnace 7, in which the assembly chamber of the automated cleaning equipment complex is equipped, transport communications are arranged, the space is sealed off from the atmosphere at all masters — they install sealed jumpers and lock devices of discrete actions Twi 8 and 9 for passing mined coal, delivering equipment and materials, and passing people.

The isolated space of the excavation block is filled with an inert gaseous medium by using the natural release of methane from the coal seam and side rocks or by artificially injecting inert gas from special containers.

To increase the safety of work and efficient utilization of associated energy sources (methane, dust and heat), when preparing the excavation block for operation between the haulage and ventilation openings of the block, mining excavation 10 is carried out, which forms a closed loop of the isolated space of the excavation block. In this development, in specially equipped cameras, the necessary equipment is installed. A fan installation is installed in the chamber 11, which creates a continuous circulation mixing of the inert gas medium in the circuit of the isolated space, which prevents stratification and heterogeneity of the medium in terms of methane, dust and heat, and eliminates the possibility of fire-hazardous situations. In the chamber 12, a dust removal unit is mounted, in jcaMepax 13 and 14, respectively, methane and heat extraction devices that are transported from mining excavation unit 16, sealed by dam 15, from the excavation unit for further disposal.

Coal mining is performed by automated remotely controlled units and equipment complexes. The technological processes are controlled from the general control panel of the dispatcher, the local panel located near the isolated space in the ventilated excavation, or from the console of the mobile sealed box-base located in the isolated space and moved after the clearing face.

Claims (1)

Claim Method A method for unmanned development of gas-bearing coal seams, switching off the preparation of the excavation block by haulage and ventilation workings, isolating the excavations of the excavation block with hermetic bridges and lock devices, creating in the isolated space a excavation block with an inert gaseous medium and maintaining in it operational works, characterized by , in order to improve mining safety by preventing the separation of an inert gaseous medium, as well as efficient selection will energy carriers and their utilization, between the haulage and ventilation workings of the excavation block, the mining excavation is additionally carried out and form a closed loop of the isolated space, and from the mountain the extraction is carried out by the diverting generation, then, in the process of mining the excavation block, in the indicated insulated circuit, forced circulation of the inert gaseous medium and its mixing is created, while excess methane is removed from the inert gaseous medium, and dust and heat are supplied through the mining development for disposal.