Deep seam strip mining and filling simulation test system and method

Abstract

The invention discloses a deep seam strip mining and filling simulation test system and method, relates to the field of preventing and treating deep rock fissure evolution and water inrush, and solves the important problem that the prior fundamental research is relatively insufficient on rock fracturing law of deep coal seam mining on high confined water, fissure evolution characteristics and inrush prevention by filling; the test system comprises a bearing box, a test model and a filling system; the test model is positioned in the bearing box and comprises a rock stratum and a coal seam positioned in the rock stratum, the rock stratum is made by laying similar material, a water confining device is arranged around the rock stratum, a plurality of sensors and a plurality of plastic balls loaded with calcium oxide particles are buried in the rock stratum, and the coal seam is simulated by arranging a plurality of loaded air bags. The test system can simulate the mining of coal seams under different ratios of extraction to reservation and different mining thickness, and can also provide the study on stress and displacement change law of roof and floor after the mining of coal seams under ratios of extraction to reservation and different mining thickness and after filling of a gob.

Description

technical field [0001] The invention relates to the evolution of deep rock mass fissures and the prevention and control of water inrush disasters, in particular to a deep coal seam strip mining and filling simulation test system and a simulation test method. Background technique [0002] The evolution of fissures in the deep floor rock mass and hydraulic coupling are the essential causes of water inrush at the working face. Studying the evolution law of deep floor rock mass rupture and fissures has scientific guiding significance for the safe mining of coal seams above confined water and the evaluation of water inrush disasters. The statistics of water inrush in existing mining areas show that more than 80% of water inrush events are related to fault structures, and water inrush rarely occurs under the condition of a complete floor. High ground stress, mining disturbance and high confined water are more likely to lead to the activation of floor faults, resulting in rock mas...

AI Technical Summary

Problems solved by technology

[0003] Many scholars at home and abroad have done a lot of research work on the evolution law of floor cracks in coal seam mining above confined water, and achieved a ser

Images