本文選題：斜井井筒 + 臨界角度　； 參考：《西安科技大學》2017年碩士論文

【摘要】：對于煤礦生產(chǎn)建設而言,井筒涌水量的預測是至關重要的。井筒涌水量的預測方法有很多,但是對于斜井井筒涌水量的求算,尚無成型的完整理論體系,一般選用現(xiàn)有的立井或平巷計算公式進行預測。對于同一斜井,用這兩種計算公式得出的是兩個數(shù)值不同的涌水量,怎樣合理的選取這兩個數(shù)值,是工程設計中的難點。本文研究的主要內容和結論有:(1)在現(xiàn)有立井和平巷的計算理論基礎上,結合前人提出的斜井適用的臨界角度概念,根據(jù)水位分布方程與降水漏斗曲線形成條件,建立臨界角度與其他影響參數(shù)之間的函數(shù)關系式,并分析主要影響參數(shù)。(2)當斜井井筒傾斜角度大于臨界角度時,形成的降水漏斗曲線與立井井筒較為接近,可以在大井法理論的基礎上推導分析。根據(jù)斜井井筒與立井井筒在形成降水漏斗過水斷面的不同,分析推導出適用于斜井井筒傾角大于臨界角度的計算公式。當傾斜角度為90°時,可將該公式還原為斷面為半圓拱狀的立井涌水量的計算公式;當傾斜角度為0°時,斜井井筒橫斷面面積趨于無窮大,理論上無法準確計算。(3)當斜井井筒傾斜角度小于臨界角度時,會使得斜井井筒的左右兩個部分不能形成相同的降水漏斗曲線,理論上在計算涌水量的過程中不適用大井法。此時可將斜井井筒視為平趴的“豎井”,在計算方法上與之前截然不同,將整個斜井井筒視為隔水地板為緩傾斜的平巷,用水平廊道法公式進行推導分析。當傾斜角度為0°時,還原為原有的水平廊道法計算公式;當傾斜角度為90°時,集水廊道長度在理論上趨近于無窮小,無法準確計算。(4)對薛廟灘煤礦副斜井的水文地質數(shù)據(jù)收集處理,根據(jù)計算出的臨界角度值小于井筒實際的傾斜角度值,選擇斜井井筒傾角小于臨界角度的改良水平廊道法計算。得出該井筒涌水量的計算值,通過數(shù)值模擬軟件GMS得到斜井井筒涌水量的模擬值,并與現(xiàn)場降水井水池流量匯總得出的真實值進行對比分析。利用潘家窯煤礦實際工程為算例分析,得到井筒傾角大于臨界角度的改良大井法計算的涌水量數(shù)值。本文研究為斜井井筒在各種傾斜角度情況下,涌水量的預測提供了相應的理論,為研究區(qū)的防治水工作提供了一定的依據(jù),并對進一步研究斜井井筒涌水量預測的問題提供了一定的參考。
[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 擄, 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 擄, 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 擄, it is reduced to the original formula of horizontal corridor method, and when the angle of inclination is 90 擄, 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.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD742

【參考文獻】

相關期刊論文 前10條

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本文編號：1807994