斜井井筒涌水量预测方法及应用研究

发布时间：2018-04-26 22:32

本文选题：斜井井筒 + 临界角度　；参考：《西安科技大学》2017年硕士论文

【摘要】：对于煤矿生产建设而言,井筒涌水量的预测是至关重要的。井筒涌水量的预测方法有很多,但是对于斜井井筒涌水量的求算,尚无成型的完整理论体系,一般选用现有的立井或平巷计算公式进行预测。对于同一斜井,用这两种计算公式得出的是两个数值不同的涌水量,怎样合理的选取这两个数值,是工程设计中的难点。本文研究的主要内容和结论有:(1)在现有立井和平巷的计算理论基础上,结合前人提出的斜井适用的临界角度概念,根据水位分布方程与降水漏斗曲线形成条件,建立临界角度与其他影响参数之间的函数关系式,并分析主要影响参数。(2)当斜井井筒倾斜角度大于临界角度时,形成的降水漏斗曲线与立井井筒较为接近,可以在大井法理论的基础上推导分析。根据斜井井筒与立井井筒在形成降水漏斗过水断面的不同,分析推导出适用于斜井井筒倾角大于临界角度的计算公式。当倾斜角度为90°时,可将该公式还原为断面为半圆拱状的立井涌水量的计算公式;当倾斜角度为0°时,斜井井筒横断面面积趋于无穷大,理论上无法准确计算。(3)当斜井井筒倾斜角度小于临界角度时,会使得斜井井筒的左右两个部分不能形成相同的降水漏斗曲线,理论上在计算涌水量的过程中不适用大井法。此时可将斜井井筒视为平趴的“竖井”,在计算方法上与之前截然不同,将整个斜井井筒视为隔水地板为缓倾斜的平巷,用水平廊道法公式进行推导分析。当倾斜角度为0°时,还原为原有的水平廊道法计算公式;当倾斜角度为90°时,集水廊道长度在理论上趋近于无穷小,无法准确计算。(4)对薛庙滩煤矿副斜井的水文地质数据收集处理,根据计算出的临界角度值小于井筒实际的倾斜角度值,选择斜井井筒倾角小于临界角度的改良水平廊道法计算。得出该井筒涌水量的计算值,通过数值模拟软件GMS得到斜井井筒涌水量的模拟值,并与现场降水井水池流量汇总得出的真实值进行对比分析。利用潘家窑煤矿实际工程为算例分析,得到井筒倾角大于临界角度的改良大井法计算的涌水量数值。本文研究为斜井井筒在各种倾斜角度情况下,涌水量的预测提供了相应的理论,为研究区的防治水工作提供了一定的依据,并对进一步研究斜井井筒涌水量预测的问题提供了一定的参考。
[Abstract]:For coal mine production and construction, the prediction of wellbore water inflow is very important. There are many methods for predicting wellbore water inflow, but there is no complete theoretical system for calculating wellbore inflow in inclined wells. For the same inclined well, the two formulas are used to calculate two different values of water discharge. How to select these two values reasonably is a difficult point in engineering design. The main contents and conclusions of this paper are as follows: (1) on the basis of the existing calculation theory of vertical shaft and roadway, combining with the concept of critical angle of inclined shaft put forward by predecessors, according to the water level distribution equation and the formation condition of precipitation funnel curve, The functional relationship between critical angle and other influence parameters is established, and the main influencing parameters are analyzed. (2) when the inclined angle of inclined wellbore is larger than the critical angle, the precipitation funnel curve is close to that of vertical wellbore. It can be deduced and analyzed on the basis of the theory of large well method. According to the difference between inclined well and vertical wellbore in forming the cross section of precipitation funnel, a formula for calculating inclined angle of inclined shaft is derived. When the angle of inclination is 90 掳, the formula can be reduced to the formula for calculating the water inflow of vertical wells with semi-circular arch section, and when the angle of inclination is 0 掳, the cross section area of inclined shaft tends to infinity. When the inclined angle of inclined wellbore is less than the critical angle, it will make the two parts of inclined wellbore unable to form the same precipitation funnel curve. In theory, the large well method is not applicable in the calculation of water inflow. At this time, the inclined shaft can be regarded as a horizontal "shaft", and the calculation method is quite different from that before. The whole inclined well shaft is regarded as a horizontal inclined alley with a waterproofing floor, and the formula of horizontal corridor method is used to deduce and analyze it. When the angle of inclination is 0 掳, it is reduced to the original formula of horizontal corridor method, and when the angle of inclination is 90 掳, the length of catchment corridor approaches infinitesimal in theory. The hydrogeological data collection and processing of auxiliary inclined well in Xue Miao Tan Coal Mine can not be accurately calculated. According to the calculated critical angle value is less than the actual inclined angle value of wellbore, the improved horizontal corridor method with inclined shaft angle less than critical angle is selected. The calculated values of wellbore inflow are obtained, and the simulated values of wellbore inflow in inclined wells are obtained by numerical simulation software GMS, and are compared with the real values obtained from the summation of water flow in the field precipitation well pool. By using the practical engineering of Panjiayao coal mine as an example, the water inflow calculated by the improved large well method with inclined shaft angle greater than critical angle is obtained. The research in this paper provides the corresponding theory for the prediction of water inflow in inclined wellbore under various inclined angles, and provides a certain basis for the prevention and control of water in the study area. It also provides some reference for further research on prediction of wellbore water inflow in inclined wells.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD742

【参考文献】