A method for determining the storage capacity of underground reservoirs in open-pit coal mines

Abstract

The invention discloses a method for determining storage capacity of an open coal mine underground reservoir, and the method comprises the steps of: (1) collecting length L1 and width of W1 of the upper bottom, length L2 and width W2 of the lower bottom and height H of the open coal mine underground reservoir, and calculating the space volume V1 of the open coal mine underground reservoir; (2) collecting mass m and density rho of backfill materials in the open coal mine underground reservoir, and calculating the volume V2 of the backfill materials; (3) collecting area s and thickness h1 of a purifying and filtering layer of the open coal mine underground reservoir, and calculating the volume V3 of the purifying and filtering layer; (4) collecting thickness h2 of a waterproof layer of the open coal mine underground reservoir, and calculating the volume V4 of the waterproof layer; and (5) calculating the storage capacity V of the open coal mine underground reservoir. By adopting the method, the traditional complicated measuring operation of the underground reservoir is simplified, the measurement difficulty of the storage capacity of the open coal mine underground reservoir is reduced, the labor cost is saved and the data support is provided for storage capacity monitoring and water resource distribution at the same time.

Description

technical field [0001] The invention relates to a method for determining the capacity of a reservoir, in particular to a method for determining the capacity of an underground reservoir in an open-pit coal mine. Background technique [0002] The underground reservoirs of open-pit coal mines are different from the general underground reservoirs. Common underground reservoirs use the existing underground space or coal mine goaf, while the underground reservoirs of open-pit coal mines are constructed manually. The semi-enclosed area enclosed by the bottom or a certain step is the underground space formed after backfilling. [0003] The traditional calculation method of reservoir capacity and underground reservoir capacity usually needs to measure parameters such as the volume of water storage body and gravity water supply, which is cumbersome and difficult to measure. Taking the underground reservoir with porous medium as the water storage space as an example, the traditional un...

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Problems solved by technology

[0003] The traditional calculation method of reservoir capacity and underground reservoir capacity usually needs to measure parameters such as the volume of water storage body and gravity water supply, which is cumbersome and difficult to measure. Taking the underground reservoir with porous medium as the water storage space as an example, the traditional underground reservoir capacity The determination method needs to measure the volume of the water storage body and the water supply degree of the medium. The volume of the water storage body is equal to the product of the average thickness of various water storage bodies in the reservoir area and the water surface area. The average thickness needs to be obtained through geophysical prospecting or drilling. engineering, but the water supply needs to drill holes to sample various water storage bodies respectively, and carry out a large amount of corresponding measurement work in the laboratory to obtain it. It can be seen that the measurement work of the reservoir storage capacity measurement method in the prior art is very cumbersome and difficult. larger

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