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  

Simulation experiment of water-sand inrush during the mining of the shallow coal seam under roof aquifer with thin bedrock

作　　者：赵启峰[1,2] 张农[2] 韩昌良[2] 郭玉[2] 石建军[1] 殷帅峰[1] 潘东江 

机构地区：[1]华北科技学院矿井灾害防治河北省重点实验室,河北三河065201 [2]中国矿业大学深部煤炭资源开采教育部重点实验室矿业工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2017年第3期444-451,共8页Journal of Mining & Safety Engineering

基　　金：河北省高等学校科学技术研究项目(Z2017045);河北省省级科技计划自筹项目(16274108);国家自然科学基金项目(51404251;51674119)

摘　　要：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。Synthesizing the aquifer occurrence, coal mining conditions, and geological characteristics of rock mass structure mechanics, a simulation experiment device of water-sand inrush gas-liquid link- age was developed which includes simulation device of coal bearing strata with roof aquifer, pneu- marie-hydraulic interaction control device, and water＇pressure and volume monitoring device. The de- sign maximum injection pressure is 80 kPa, the precision monitoring of water pressure 1.0 kPa, and wa- ter level accuracy 1.0 mm. Through the simulation experiment of water-sand inrush channel during the mining of the shallow coal seam under roof aquifer in Shendong Coalfield, the overlying strata fracture development and distribution characteristic-s-of water-sand inrush channel were analyzed. The results have shown that along the working face advancing direction, the water-inrush channels developed inthree stages： the stage of gradual development, the stage of penetration linking channel formation, and the stage of water-sand inrush from the roof aquifer; the area of the overlying rock fracture and wa-- ter-sand inrush can be divided into three sections： the zone of overburden fractures gradual development, the zone of water-sand intrusion, and the zone of water-sand-intrusion blocking.

关 键 词：突水溃砂 气液联动 固流耦合 

分 类 号：TD35[矿业工程—矿井建设]