Three-dimensional simulation test device for surface movement in underground coal mining and test method

Abstract

The invention discloses a three-dimensional simulation test device for surface movement in underground coal mining and a test method. The three-dimensional simulation test device comprises an outer frame, a pressurizing mechanism, a drawing mechanism and a coal-layer simulation part, wherein the coal-layer simulation part is arranged in the outer frame, and a coal-layer similar material also fillsthe upper surface of the coal-layer simulation part; the coal-layer simulation part comprises a plurality of coal mining blocks and a plurality of reserved coal pillar components; the pressurizing mechanism is arranged at the top part of the outer frame, and is connected with the outer frame by a pressurizing-position adjusting unit; the drawing mechanism is arranged at the bottom part of the outer frame, and is connected with the outer frame by a drawing-position adjusting unit. The three-dimensional simulation test device can be combined with a coal mining site to simulate irregular strip mining, and has the beneficial effects that the mining height is changeable, the mining speed is controllable, and pressurized pavement of similar materials is convenient.

Description

technical field [0001] The invention relates to the technical field of mine mining simulation tests, in particular to a three-dimensional simulation test device and test method for underground coal mining surface movement. Background technique [0002] With the continuous mining of coal resources in my country, the expansion of urban construction scale, and the increase of village relocation costs, the problem of coal mining has become an important factor restricting the sustainable development of coal mines. At present, many mines in the eastern part of my country are facing severe "three-down" coal pressure problems, and the amount of coal resources mined in mines is gradually decreasing. Strip mining is an effective method to solve coal pressure, that is, the area to be mined is divided into several strips reasonably, and the strips are mined and reserved in a planned order, and the reserved strips support the goaf Overlying rock mass in the area, thereby alleviating sur...

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Problems solved by technology

[0004] After searching, most of the existing simulation test devices for similar materials in coal mining are two-dimensional test benches (CN205642864U, CN204789567U) for simulating the movement of coal mine excavation roof and rock strata. limitations, and the simulation test is inevitably affected by manual excavation; some three-dimensional test devices are mostly box-type structures (CN204594982U,

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