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以隆德煤矿为例,基于颗粒流和液体流2种流体力学理论,提出了预测突水溃沙流量的溃沙漏斗和突水口2种模型,探讨了地质钻孔导致隆德煤矿突水溃沙事故的形成机理和防治对策。主要研究结果包括:1)相比于溃沙漏斗模型,突水口模型预测的突水溃沙流量与现场推测数据更为接近,可以较好地揭示隆德煤矿地质钻孔导致的突水溃沙现象;其中,决定突水溃沙事故流量大小的2个关键因素为含水沙层的厚度和钻孔直径;2)建立了地表动态沉陷模型,地表溃沙漏斗中心点沉降值及影响半径均随时间的增长而增加,但加速度逐渐减小;3)提出了“采掘工程设计前,排查钻孔并封堵”的预防对策,以及“管道流变裂隙流,裂隙流变空隙流,最后注浆封堵”的治理对策。
Taking Lund Coal Mine as an example, based on the two fluid mechanics theories of particle flow and liquid flow, two models of water inrush and water inrush for predicting water inrush flow were proposed, and the water inrush caused by geological drilling in Lund Coal Mine Formation mechanism and prevention and cure measures of sand accident. The main results are as follows: 1) Compared with the model, the prediction of water inrush flow by the water inrush model is closer to the in situ speculation data, which can well reveal the water inrush caused by the geological drilling in Lund Coal Mine 2) The dynamic surface subsidence model was established. The sedimentation value and the radius of influence of the center of the earth-surface funnel were both as follows: Time increases, but the acceleration decreases gradually; 3) Preventive countermeasures such as “pipe rheology fissure flow, fissure rheological void flow, pre-excavation drilling and sealing” Final grouting block "management measures.