某地下水封洞库水幕多孔联合试验参数分析

Parameter Analysis of Multi-Hole Joint Test for Water Curtain of the Underground Water-Sealed Cavern

能源储备体系不仅是保障国家社会经济安全,应对突发事件的必要手段,更可以有效控制能源产品的价格,稳定供求关系。水幕系统水力效率试验中,多孔联合试验对水幕孔孔间水力传导效率进行直接判断,通过3个阶段的试验,得到水幕孔压力、流量等重要水力参数。在大量工程试验的基础上筛选出标准曲线,对水幕孔压力曲线进行定性评价。但由于此方法主观性强,识别上存在一定困难,因此难以推广成为评价标准。在洞库封存原理和水平水幕孔工作原理的前提下,将水平孔视为等强度的线汇,不考虑水平井井管中的流动对地下水渗流场的反作用,假设水幕层岩体为均值各项同性,通过对水幕孔周围裂隙水流态识别,结合Aberg关于洞室储存的水力梯度理论,推导出阈值求解路线。根据已知条件求解运营期的水幕系统临界效率值,通过线性函数拟合求解试验阶段的阈值,为定性评价水幕系统效率、优化系统结构提供了可靠的数据支持。数据分析的工程中,总结了一套适用于阈值法评价水幕系统的补孔原则。

The energy reserve system is not only a necessary means to ensure national socio-economic security and deal with emergencies, but also can effectively control the price of energy products and stabilize the relationship between supply and demand. For the multi-hole joint test, through 3 stages of test to judge the efficiency of hydraulic conductivity of rock, getting the water curtain hole important hydraulic parameters such as pressure, flow rate, and so on. Selecting standard curve on the basis of a large number of engineering test, qualitative evaluating water curtain hole pressure curve. But as a result of this method’s strong subjectivity, there is a certain difficulty in curve recognition, so it’s difficult to become an evaluation standard. Based on the principle of the underground storage principle and working principle of water curtain horizontal hole, regarding the horizontal hole streamline as the same strength wire transfer, regardless of the adverse effect for the groundwater seepage field by horizontal well, assuming that the water curtain layer rock is homogeneous isotropic medium, through the fissure water state recognition around the water curtain hole, combining with Aberg’ hydraulic gradient theory, deducing the solve method. According to the known conditions, the minimum efficiency value of water curtain layer in operation period is obtained, and the threshold value of test stage is obtained by linear function fitting, which provides reliable data support for qualitative evaluation of water curtain system efficiency and optimization of system structure. In the project of data analysis, summed up a set of suitable for threshold method to evaluate the water system hole supplemental principle.