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综合考虑含水层赋存、开采地质力学条件及煤岩体结构特征,自主研发了突水溃砂气液联动相似模拟实验装置,该设备包括含水层煤系地层模拟装置、气液联动调控装置和水压水量监测装置,设计最大注水压力80 k Pa,监测水压力精度1.0 k Pa,水位精度1.0 mm。通过神东矿区浅埋薄基岩含水层下煤层开采突水溃砂相似模拟实验,研究了采动煤岩体裂隙发育及突水溃砂导水通道分布特征,结果表明:沿工作面推进方向,突水溃砂通道发育过程划分为裂隙渐次发育阶段、裂隙贯通阶段和突水溃砂通道形成3个阶段;覆岩破断及突水溃砂区域划分为覆岩裂隙渐次发育区、水砂侵入区和水砂侵入阻断区3个区域。
Considering the occurrence of aquifers, the conditions of mining geomechanics and the structural features of coal and rock mass, a similar simulative experimental apparatus for gas-liquid interaction of water inrush was developed independently. The equipment includes aquifer stratigraphic simulator, gas-liquid interaction control device and Water pressure monitoring device, the design maximum water pressure 80 k Pa, monitoring water pressure accuracy of 1.0 k Pa, water level accuracy of 1.0 mm. Through the similar simulation experiment of water inrush, which is under the shallow buried - bedrock aquifer in Shendong Mining Area, the authors studied the distribution of fractured development and water inrush channel in water - bursting coal mining. The results show that: , The process of water-bursting sand passage is divided into three stages of gradual development of fractures, fissure penetration and water-bursting sand passage; the area of overlying rock rupture and water inrush is divided into gradual development of overburden fractures, Zone and water sand intrusion blocking zone 3 areas.