SU929868A1 - Method of preventing spontaneous coal and gas outbursts in stoping and preparotary workings - Google Patents

Description

(54) METHOD OF PREVENTION OF EMERGENCY COAL AND GAS EMISSIONS IN CLEANING AND PREPARATORY

one

The invention relates to the mining industry and can be used to prevent the sudden release of coal and gas in the mine workings.

There is a method of dealing with sudden emissions in the development workings, which consists in the high-pressure humidification of coal seams through a system of advanced wells drilled along the generation axis 1.

The disadvantage of this method is the necessity of drilling a large number of wells and the absence of degassing of the coal seam.

A known method for combating sudden emissions of coal and gas consists in drilling degassing wells, sealing them and sucking methane through degassing wells connected via pipelines to mobile underground vacuum pumps 2.

The disadvantage of this method is the relatively low efficiency in those cases where the vibro-hazard of the formation is caused by a change in the stress state in the near-bottom part of the coal seam.

DEVELOPMENTS

The purpose of the invention is to reduce costs and increase the effectiveness of measures to prevent emissions.

The goal is achieved by degassing the reservoir by vacuuming through perforated anchors, which periodically catch into the coal seam to a depth exceeding the reference pressure zone, after which the reservoir is hydrofluxed by

, d layer of fluid under pressure through perforated anchors.

FIG. 1 shows a face with anchors installed; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. I.

Claims (2)

Hollow anchors 3, made in the form of a perforated pipe with openings 4, a tip at the head of the anchor and fitting 5 in the tail section, are removed into the reservoir 1 from the production of 2 hydromasters, the anchor length is chosen so that the tip goes beyond the reference pressure zone, after what is done by degassing reservoir 1 by vacuuming with a mobile vacuum pump, and then through the hollow anchors 3 the reservoir is hydrofluidized by injecting fluid into the reservoir through the anchors. After excavation, the exposed ends of the anchors are pushed into the formation, thus ensuring their reuse. The proposed method can be used to prevent sudden emissions in the construction of niches for combines during cleaning operations. The proposed method provides an increase in the effectiveness of anti-blowout measures by eliminating the process of drilling wells for degassing the reservoir and hydraulically loosening it and allows for degassing the reservoir and its moistening at the same time. Claims A method for preventing sudden coal and gas emissions in cleaning and developmental workings, including degassing a coal seam, characterized in that, in order to reduce costs and increase the efficiency of emission prevention, degassing is carried out by vacuuming through perforated anchors that periodically crush into a coal seam. depth exceeding the reference pressure zone, after which the reservoir is hydrofluxed by injecting fluid into the formation under pressure through perforated anchors. Sources of information taken into account in the examination 1. Instructions for the safe conduct of mining operations on formations prone to sudden emissions of coal, rock and gas. M., “Nedra, 1977. 2. Instructions for the safe conduct of mining operations on seams prone to sudden emissions of coal, rock and gas. M., IGD them. A. A. Skochinsky, 1980 (prototype)