巷道底板锚固孔钻进泵吸反循环排渣数值试验

发布时间：2018-03-07 22:22

本文选题：底板锚固孔　切入点：双壁钻杆　出处：《采矿与安全工程学报》2017年01期 　论文类型：期刊论文

【摘要】：根据循环介质(水)泵吸反循环排渣原理,建立底板锚固孔钻进排渣双壁钻杆模型,利用流体分析软件FLUENT对具有不同横截面尺寸双壁钻杆进行流体排渣过程数值试验研究,并以排渣效率为指标优选出双壁钻杆最优横截面尺寸。运用正交设计试验中方差分析法对影响双壁钻杆排渣效率的各因素进行详尽分析研究得知:随着循环介质进口水流量的增大,排渣效率不断提升;在一定范围内水渣混合物出口压力及钻孔深度对排渣效率的影响不明显;双壁钻杆泵吸反循环排渣系统的最优工况条件为:循环介质进口水流量为2 l/s、水渣混合物出口压力为-90 k Pa。井下底板锚固孔钻进排渣工业性试验取得了一定成效,说明流体排渣数值模拟方法能够实现双壁钻杆结构尺寸优化,并对现场钻进工作具有一定的指导意义。
[Abstract]:According to the principle of suction and reverse circulation slag discharge by circulating medium (water) pump, a double-wall drilling pipe model for bottom plate Anchorage hole drilling is established, and the fluid discharge process of double-wall drilling pipe with different cross section size is studied by using fluid analysis software FLUENT. The optimum cross section size of double-wall drill pipe is selected with slag discharge efficiency as the index. The factors affecting the efficiency of double-wall drilling pipe are analyzed and studied in detail by using variance analysis method in orthogonal design experiment. It is found that: with circulating medium. An increase in the flow of imported water, The effect of outlet pressure and drilling depth on slag discharge efficiency is not obvious in a certain range. The optimum working conditions of double-wall drilling pipe pump suction reverse circulation slag discharge system are as follows: the inlet water flow rate of circulating medium is 2 L / s, the outlet pressure of water slag mixture is -90 kPa. the industrial test of bottom plate anchoring hole drilling and slag discharging has achieved certain results. The results show that the numerical simulation method of fluid slag discharge can realize the optimization of the structure size of double-wall drilling pipe, and it has certain guiding significance for the field drilling work.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;天地科技股份有限公司开采设计事业部;中国矿业大学(北京)化学与环境工程学院;
【基金】：国家科技支撑计划项目(2012BAB13B02) 国家自然科学基金煤炭联合基金重点项目(U1261211)
【分类号】：TD327.3

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