SU1257227A1 - Method for determining maximum depth of posibble outburst manifestations for outburst-safe beds mined with outburst hazard evaluation - Google Patents

Description

The invention relates to the mining industry and can be used to determine the maximum. the depths of possible emissions from the development of non-hazardous formations with a prediction of emission hazards, after which these reservoirs are classified as non-hazardous, and no further hazard-based forecasting is carried out.

The purpose of the invention is to improve the accuracy of determining the maximum depth of the possible emission of emissions and reducing the value of the emission / hazard forecast.

The method is carried out as follows.

When drilling exploration wells with the help of core glands, at a certain interval LL, samples are taken at the depth of the coal seam and the natural gas content of the formation is measured. Then set the depth H, on which the gas carrier of the coal seam reaches the max.

Editor S. Lisin

Compiled by M.Gagulin

Tehred I.Popovich; Corrector B, But ha

Order 4892/27 Circulation 436Subscription

VNIIPI State Committee. The USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Projects:, 4

the maximum value, and the ratio H,, H + 0.5 determines the maximum OC

depth of potential emissions.

An example. When developing a non-hazardous formation 84 at the mine from a depth of 500 m, an outburst hazard prediction is carried out. In order to determine the maximum depth of possible emissions during the development of this reservoir, exploratory wells are drilled, samples are taken using core glands and the natural gas content of the coal reservoir is measured at a certain interval h 100 m depth of the reservoir. It has been established that the maximum gas content of the coal seam is reached at a depth of 700 m. The maximum depth of the possible emissions during the development of the reservoir is determined by the ratio, H + 0.5 uh 700 .- "+ 0.5-100 750 m. According to the proposed the method below the development depth of 750 m on formation 4 should be excluded.

Claims (1)

METHOD FOR DETERMINING THE MAXIMUM DEPTH OF THE POSSIBLE MANIFESTATION OF EMISSIONS IN NON-EMISSIBLE FORMES DEVELOPED WITH AN EMISSION FORECAST, including well drilling, measuring the natural gas content of a coal seam, which distinguishes with the aim of determining the maximum cost, which makes it possible to determine the maximum depth and gas emission potential the gas content of the coal seam is measured by the depth, while the interval of the depth of measurement of natural gas content is set and maximum depth of the coal seam gas content, and the maximum depth possible existence of emission is determined by the ratio ^H H Max = + 0,5 Ah, where H _Max - maximum depth _WHO-Q can display vybro- cos SB, M ', H - the depth of the maximum gas content of the coal seam, m; Ah is the interval of the depth of measurement of the gas • content of the coal seam, m. SU "., 1257227 t