A simulation analysis device and method for pressure regulation and ventilation in multi-layer goaf of coal seam group
A technology of simulation analysis and goaf, applied in mining equipment, mine/tunnel ventilation, mining equipment, etc., can solve the problems of large selection error of pressure regulation parameters, high debugging cost, lack of reasonable parameters and pressure regulation effect, etc.
Active Publication Date: 2019-12-03
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology
At present, methods of pressure regulation and ventilation in multi-layer mined-out areas of coal seam groups mostly use methods such as theoretical analysis, numerical simulation, or on-site debugging. There are problems such as too large errors in the selection of pressure regulation parameters or high debugging costs, and there is a lack of application of experimental methods to comprehensively Analysis and determination of reasonable parameters and effect of pressure regulation in working face and multi-layer goaf
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[0071] A simulation analysis device for pressure regulation and ventilation in multi-layer gobs of coal seam groups, the schematic diagram of its three-dimensional structure is shown in figure 1 , specifically including simulating the working face, simulating the roof strata, simulating the goaf in this layer, and simulating the upper gob;
[0072] in,
[0073] (1) The simulated working face includes air inlet pipeline 1, coal mining face pipeline 2, air return lane pipeline 3, simulated air window 5, colored smoke release box 6, and wind pressure sensor of simulated working face 7. The oxygen concentration sensor 8 of the simulated working face and the sulfur hexafluoride concentration sensor 9 of the simulated working face;
[0074] The air inlet pipeline 1 and the air return pipeline 3 are respectively arranged on both sides of the simulated working face, and are connected through the coal mining face pipeline 2, and the colored smoke release box is arranged at the air inl...
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The invention, which belongs to the field of coal mine disaster prevention and control, provides a simulated analysis device and method for pressure regulation and ventilation of a multi-level goaf ofa coal seam group. The device comprises a simulated working face, a simulated roof rock layer, a simulated local-layer goaf, and a simulated upper goaf. The simulated working face includes an inlet way pipeline, a coal mining face pipeline, a return air pipeline, a small fan, a simulated wind window, a color smoke release box, a wind pressure sensor, an oxygen and the sulfur hexafluoride concentration sensor. The simulated local-layer goaf and the upper goaf are glass steel box bodies with transparent glass balls filling the insides and are provided with multiple oxygen and sulfur hexafluoride concentration sensors and wind pressure sensors. Gas in the simulated working face, the local-layer goaf, and the upper goaf are set to have different colors. The air flowing rules and voltage regulation effects of the flowing fields of the working face and the multi-layer goaf are analyzed comprehensively, qualitatively and quantitatively by observing air flowing directions in various ventilation modes and real-time monitoring values of all sensors, thereby providing parameter guidance for engineering practice.
Description
technical field [0001] The invention belongs to the field of disaster prevention and control in coal mines, and in particular relates to a pressure regulation and ventilation simulation analysis device and method for multi-layer gobs of coal seam groups. Background technique [0002] Most of the mining areas in my country are coal seam groups, and after mining, multi-layer goafs are connected to each other. During the mining process of the lower coal seam working face, the traditional negative pressure ventilation method is used, which can easily cause the leakage of toxic and harmful gases such as gas and carbon monoxide in the upper multi-layer goaf, threatening the safe production of the working face. With the positive pressure ventilation method, the wind pressure at the working face is higher than that of the upper multi-storey goaf, and a large amount of fresh air flows into the goaf, which may easily cause spontaneous combustion of residual coal in the goaf or even a ...
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IPC IPC(8): E21F17/18E21F1/08
CPCE21F1/08E21F17/18
Inventor 张勋王鑫阳王继仁邓存宝金智新张大明王雪峰
Owner LIAONING TECHNICAL UNIVERSITY