Method for exactly measuring storage capacity of mine underground reservoir

Abstract

The invention discloses a method for exactly measuring storage capacity of a mine underground reservoir. The method includes steps of drilling holes in a coal field, or confirming thickness of a coal seam and specific thickness of every rock stratum by referring to the existing geological materials; calculating respective caving water storage height and crack water storage height of a hard rock stratum and a weak rock stratum from bottom to top; collecting a breaking rising coefficient of a rock layer beneath the caving zone rock stratum, strike length and tending length of a gob; calculating the water storage of the rock stratum scales of the caving zone and the crack zone; measuring the water level of the mine underground reservoir through the real-time water level monitoring system; determining the height of the covered rock stratum from bottom to top according to the height value, and calculating the storage capacity of the mine underground reservoir. When the water level is changed, the change of the water reserve of the reservoir is acquired through the water level change, or key data such as the rest space of the reservoir is calculated; the method has important function in allocation of the reservoir and the prevention and control of the water resource.

Description

technical field [0001] The invention relates to a method for measuring the capacity of a reservoir, in particular to a method for accurately measuring the capacity of an underground reservoir in a coal mine. Background technique [0002] Coal mine underground reservoir is a rock mass void in the goaf formed by coal mining. Artificial dams are used to connect discontinuous safety coal pillars to form a reservoir dam, forming a relatively closed water storage space. At the same time, mine water injection facilities and water intake facilities are built. , making full use of the natural purification effect of goaf rock mass on mine water to realize underground storage and utilization of mine water. This technology has been successfully fully implemented in Shendong mining area. The storage capacity of underground reservoirs in coal mines is studied by multiplying the storage volume of the reservoir by the water storage coefficient, and the water storage coefficient is quoted fr...

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Problems solved by technology

[0003] The Chinese invention patent with the application number CN201210256976.6 discloses a method for determining the storage capacity of underground reservoirs in mines. To measure the storage capacity of underground reservoirs, a reference mine is required, and the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the reference well are required. It is consistent with the underground reservoir of the mine to be tested. How to quantify and calculate the consistency of these data is not sure for the time being. At the same time, if there are no mines with the same conditions, the practicability of this method will be greatly reduced, so a new method is urgently needed to accurately measure the storage capacity of underground water reservoirs

[0004] At the same time, and most importantly, we need to accurately measure the storage capacity of different reservoir depths, because the storage capacity is not linearly related to the water depth, and even varies greatly; the mine needs to know the accurate storage capacity of the reservoir at any time, according to the previous linear estimation , will cause a huge difference, because the area of ​​the gob is huge and the base is too large; therefore, it is particularly important to find a method that can accurately measure the storage capacity of the coal mine underground reservoir

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