钻孔导致突水溃沙事故机理及防治对策研究

发布时间：2018-06-30 02:46

本文选题：地质钻孔 + 突水溃沙　；参考：《采矿与安全工程学报》2015年02期

【摘要】：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。
[Abstract]:Taking Longde Coal Mine as an example, based on two kinds of fluid mechanics theories, particle flow and liquid flow, two kinds of models for predicting water and sand bursting discharge are put forward. The formation mechanism and prevention measures of water and sand bursting accidents caused by geological boreholes in Longde Coal Mine are discussed. The main results include: (1) compared with the blow-up funnel model, the water burst discharge predicted by the water burst model is closer to the predicted data, which can better reveal the phenomenon of water and sand bursting caused by geological boreholes in Longde coal mine. The dynamic subsidence model is established for the two key factors determining the discharge of water bursting sand accident: the thickness of water-bearing sand layer and the diameter of borehole. The settlement value and the influence radius of the center point of the surface collapsing funnel increase with the increase of time. However, the acceleration decreases gradually) and puts forward the preventive countermeasures of "check boreholes and seal before excavation engineering design", as well as the treatment countermeasures of "pipe rheological fissure flow, fracture rheological void flow and final grouting plugging".
【作者单位】：中国矿业大学矿业工程学院深部岩土力学与地下工程国家重点实验室;山西省国新能源发展集团有限公司;
【基金】：国家重点基础研究发展计划(973)项目(2013CB227900) 中国矿业大学深部岩土力学与地下工程国家重点实验室博士后基金项目(PD1301) 江苏省自然科学基金项目(BK20140213) 国家自然科学基金项目(51374197)
【分类号】：TD745

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