Oil storage depot, oil storage method and construction method in closed pit mine main road

Abstract

The invention relates to an oil storage depot for a main roadway of a coal mine in a closed pit, an oil storage method thereof and a construction method thereof, pertaining to the technical field of oil storage. Problems of a conventional underground oil storage depot such as great construction difficulty, high cost, damage of high-frequency alternating stress upon a depot body during injection-production are resolved. The oil storage depot comprises a depot body and an artificial dam body. The depot body is built in the main roadway of the coal mine in the closed pit. The artificial dam bodyis used for sealing the depot body. The depot body comprises an overall structure composed of surrounding rocks of the main roadway, a concrete spray layer and a steel plate layer. The top of the depot body is equipped with an injection and oil extraction pipeline and a pressure-regulating pipeline. The bottom of the depot body is equipped with a water drawing and injection pipeline. The injectionand oil extraction pipeline and the water drawing and injection pipeline are both equipped with electric control valves. The electric control valves can regulate flow amount of oil in the injection and oil extraction pipeline and flow amount of water in the water drawing and injection pipeline so as to control the total volume of oil and water in the depot body to remain unchanged. Provided are an oil storage method thereof and a construction method of the oil storage depot. Therefore, utilization rate of underground space is increased. Construction difficulty and cost are lowered. Service lifetime of the oil storage depot is prolonged.

Description

technical field [0001] The invention relates to the technical field of oil storage, in particular to an oil storage depot in a closed mine shaft, an oil storage method and a construction method. Background technique [0002] Coal is the main energy source in my country, and more than 90% of my country's coal mines are underground mining. According to statistics, as of 2016, the total excavation footage of my country's key coal mines is about 8338km. After long-term large-scale mining, the coal resources of many coal mines tend to be exhausted, or have been exhausted and closed, or closed due to policy, thus forming coal mines to be transformed. In the process of construction and production of coal mines, a large amount of space will inevitably be generated. In addition to the mining roadway at the working face, the underground roadway development and preparation roadway support conditions are good and relatively stable. After the mine is closed, if the mine is closed directl...

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide an oil storage depot in a closed mine shaft, an oil storage method and a construction method, which are used to solve the problems of difficulty in building existing underground oil depots, high cost, difficult adjustment of storage capacity and problems of injection and production of oil depots. During the process, oil (crude oil) is in contact with air for a long time to deteriorate, and high-frequency alternating stress causes damage to the storage body of the oil storage depot.

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