發(fā)布時間：2018-01-24 00:37

  本文關鍵詞： 地下暗河 熱水巖溶 離層水體 二次導升 安全開采　出處：《中國礦業(yè)大學（北京）》2013年博士論文　論文類型：學位論文

【摘要】：峨眉地幔熱柱的活動使玄武巖在本區(qū)缺失、隔水層變薄，使地下水一度處于超臨界狀態(tài)，CaCO3的溶解度提高了95%，巖溶很發(fā)育，并發(fā)展為深部暗河。區(qū)域水位異常是裂隙偏流所致，窄縫內水位較高，寬縫內的較低。自建的模型和材料、數(shù)值模擬顯示覆巖滲透系數(shù)與裂寬增量3次方程正比，覆巖長興灰?guī)r底部易形成離層，離層區(qū)底板完整可儲水；底板最大主應力值采空區(qū)的邊長的平方、水壓成正比，和底板厚度的平方成反比。注水試驗、超聲波測試和模擬試驗證明底板可超前破壞，斷層破壞深度是完整底板的2倍，底板隱伏導水斷裂擴展即發(fā)生突水。認為迎著推進方向頂板施工鉆孔釋放了頂板離層水，預防暗河水害；縮小采礦尺寸，，加固底板隔水層，改造底板含水層和切斷導升斷裂，阻止導升擴展等方法可防治底板水害。
[Abstract]:The activity of the Emei mantle heat plume makes the basalt missing in this area and the water-insulating layer thinning. The solubility of CaCO3 in groundwater once in supercritical state has been increased by 95%, and the karst is very developed. The regional water level anomaly is caused by the fissure deviation, the water level in the narrow gap is higher, and the water level in the wide gap is lower. The numerical simulation shows that the permeability coefficient of overburden is proportional to the cubic equation of the increment of crack width, and the bottom of Changxing limestone of overburden is easy to be separated, and the bottom plate of the separated zone can store water completely. The side length of the mined-out area is directly proportional to the water pressure and inversely proportional to the square of the thickness of the bottom plate. Water injection test ultrasonic testing and simulation test prove that the bottom plate can be destroyed ahead of time. The depth of fault failure is twice as deep as that of the whole floor, and the water inrush occurs when the underground water conduction fracture spread on the floor. It is considered that the drilling hole in the face of the propelling direction releases the water from the roof to prevent the water damage from the dark river. Reducing the mining size, strengthening the water insulation layer of the bottom plate, reforming the bottom aquifer, cutting off the lift fracture and preventing the expansion of the guide can prevent and cure the water damage of the bottom plate.
【學位授予單位】：中國礦業(yè)大學（北京）
【學位級別】：博士
【學位授予年份】：2013
【分類號】：TD745

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