关键词: 浅埋煤层, 导水裂隙, 协调开采, 力学模型, 相似模拟

Abstract: The Wangjiagou coal mine is a typical shallow buried coal seam mine in northern Shaanxi. The groundwater is heavily distributed in the Sawaiwusu Formation aquifer, which may cause the aquifer to rupture and destroy the water body. In order to effectively inhibit the development of water-conducting fissures and maximize the protection of surface aquifers, based on the principle of coordinated mining, combined with mechanical models and similar material simulation tests, the coal mining method with limited height and retained coal pillars is used to coordinate the mining of the Wangjiagou coal mine. The development law of water fissure zone was studied.The research shows that, based on the coordinated mining mechanics model, the ultimate span of the main key layer is 75m, the spacing of the coal pillars is 70m, and the LCD<LAB can be kept stable. Under the condition of full mining, the overburden shows the two zones of the falling belt-water guiding fissure zone. Distribution, water-conducting fissure runs through the entire aquifer, and the high-coordinated mining overburden presents a “three-zone” distribution, and the water-conducting fissure is closed at the main key layer; the high-coordinated mining uses the support of the coal pillar to control the movement of the main key layer, and then Control the overlying rock movement, effectively inhibit the development of water-conducting fissures, reduce the height of the water-conducting fissure zone, and achieve green water-retaining mining.