Coal seam group mining and top plate and goaf water dynamic seepage three-dimensional simulator

Abstract

The invention provides a three-dimensional simulation device for coal seam group mining and water dynamic seepage in the roof and goaf, including a test bench, a rock-soil layer for testing, a mobile observation device for the ground surface, and a water source supply for the aquifer of the rock-soil layer For the device, the upper coal seam and the lower coal seam of the rock and soil layer used for the test are replaced by a hydraulic pillow structure and/or a jacking jack structure, and the hydraulic pillow structure realizes the mining of the simulated coal seam through a side pulling power device arranged outside the test bench. The present invention is provided with a hydraulic pillow structure replacing the upper layer coal and mining and a lifting jack structure replacing the lowermost layer coal and mining in the test frame, which can accurately grasp the direction and tendency of the upper layer coal and the lower layer coal after mining. The law of supporting pressure distribution; The water replenishment structure provides the required amount of water for the aquifer, so that the coal mining and the continuous water supply of the aquifer can be carried out simultaneously, and the effects of effectively simulating the three-dimensional roof dynamic movement damage and fracture seepage of multi-coal seam mining in the area can be realized.

Description

【Technical field】 [0001] The patent of the invention relates to a three-dimensional simulation device for dynamic seepage of water in a roof and a goaf during coal seam group mining, and belongs to the technical field of mining engineering experiment research. 【Background technique】 [0002] The coal mine itself is a large kilometer-level geological body, and the surrounding rock environment of the coal mine roadway is complex. The 3D simulation device for coal seam group mining and roof water dynamic seepage can reduce a large geological body into a small indoor 3D model body through similar proportions. , and through excavation to obtain the movement, destruction, cracks, seepage and other laws of rock and soil layers, so as to provide technical guidance for coal mine safety. At present, coal seam mining simulators are mostly single-plane two-dimensional solid-phase simulators. With the frequent occurrence of disasters and accidents caused by multi-coal seam mining and coa...

AI Technical Summary

Problems solved by technology

At present, most coal seam mining simulators are single-plane two-dimensional solid-phase simulators. With the frequent occurrence of disasters and accidents caused by multi-coal seam mining and coal mine water inrush in Northwest China, the existing single-plane two-dimensional solid phase simulators cannot Roof damage, roof and goaf seepage problems in the 3D mining of the simulated area. Second, the trend and tendency of the upper and lower seam coal cannot be accurately grasped in the case of multi-coal seam mining.

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