Coal gangue leaching and immersion testing device under multi-field coupling effect

Abstract

The invention discloses a coal gangue leaching and immersion testing device under a multi-field coupling effect. The coal gangue leaching and immersion testing device comprises an inner barrel, an outer barrel, a leaching solution barrel and a leaching solution collector, wherein the inner barrel is divided into a leaching solution collection region and a leaching region for filling a testing material through filtering and penetration plates; a liquid inlet plate capable of bearing pre-set pressure is arranged above the leaching region and a liquid inlet hole is formed in the liquid inlet plate; the leaching solution collection region is connected with the leaching solution collector; the leaching solution barrel is connected with the liquid inlet hole of the liquid inlet plate through a pipeline; quantitative saline water is filled into the outer barrel; the inner barrel is arranged in the outer barrel; a semiconductor chilling plate is arranged in the outer barrel. The testing devicedisclosed by the invention has the advantages of simple structure, reasonable structure and convenience for utilization; the testing device can be used for simulating a leaching and immersion test ofgoaf solid filler under the multi-field coupling effect of a stress field, a seepage field, a temperature field, an acid-alkali field and the like; a collected leaching solution is used for carryingout a heavy-metal element dissolution testing experiment, and basic data information is provided for solving the environment protection problem of solid filling in a coal mine goaf.

Description

technical field [0001] The invention relates to an analysis experiment device for the precipitation of heavy metal ions after leaching and immersion of coal gangue filled in coal mine goaf, specifically a coal gangue leaching and immersion test device under multi-field coupling action, which is used in coal mine goaf Leaching and immersion test of filled coal gangue in a multi-field coupled environment. Background technique [0002] In recent years, the recoverable reserves of many mines in my country, especially the mines in the east, have dropped sharply, and they have to face the problem of "three-down" coal mining. According to statistics, only large-scale state-owned coal mines "three times" coal pressure amounted to 13 billion tons. At the same time, a large amount of gangue and other solid waste piled up on the surface of the mining area exceeds 4.5 billion tons, and is increasing at a rate of 150 million tons every year, causing many mining problems such as occupyin...

AI Technical Summary

Problems solved by technology

Because coal gangue is mostly used for solid filling coal mining in China, and the stacking time is long, the leaching and soaking of groundwater can dissolve the heavy metal elements in coal gangue, and then penetrate into the groundwater body, which can seriously cause water pollution.

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