(1. 江西理工大學(xué) 資源與環(huán)境工程學(xué)院，贛州 341000；
2. 江西理工大學(xué) 建筑與測繪工程學(xué)院，贛州 341000)
摘 要: 掌握全覆式離子型稀土礦山臨界注液范圍的計(jì)算方法對于合理確定礦山注液范圍具有重要意義。通過注液邊界將潛在滑坡體分為兩部分：注液區(qū)潛在滑坡體提供下滑力，未注液區(qū)潛在滑坡體提供抗滑力。基于黏性土土壓力的計(jì)算方法和簡化Bishop法，建立穩(wěn)滲狀態(tài)下礦山臨界注液范圍的理論模型，并基于數(shù)值計(jì)算結(jié)果和現(xiàn)場位移監(jiān)測結(jié)果驗(yàn)證理論模型的有效性。結(jié)果表明：首先，對于坡度為25°、30°或35°的簡單邊坡，臨界注液范圍理論模型計(jì)算值與數(shù)值模型計(jì)算值的相對誤差絕對值在20%以內(nèi)，相對誤差絕對值較小，初步說明臨界注液范圍理論計(jì)算模型的有效性；其次，對于某一現(xiàn)場邊坡，理論模型計(jì)算的邊坡安全系數(shù)與其邊坡位移變化規(guī)律吻合，再次說明了臨界注液范圍理論計(jì)算模型的有效性。
關(guān)鍵字: 離子型稀土礦山；下滑力；抗滑力；邊坡安全系數(shù)；臨界注液范圍
（1. School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. School of Architectural and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China）
Abstract:For completely covered ionic-type rare earth mine, it is of great significance to master the calculation method of critical liquid injection range for determining the reasonable liquid injection range. The potential landslide mass was divided into two parts by liquid injection boundary, the potential landslide mass in liquid injection area provides glide force, the potential landslide mass in uninjected liquid area provides anti-sliding force. Based on the earth pressure calculation method of cohesive soil and simplified Bishop method, the theoretical model of critical liquid injection range under steady seepage condition was established. The validity of the theoretical model was verified by numerical results and field displacement monitoring results. The results show that, first，for a simple slope with a slope of 25°, 30° or 35°, the absolute relative error between theoretical model calculation value and numerical model calculation value of critical liquid injection range is less than 20%, the absolute relative error is smaller, the validity of the theoretical calculation model of critical liquid injection range is preliminary explained. Second，for a field slope, the slope safety factor calculated by the theoretical model coincides with the variation of slope displacement, the validity of the theoretical calculation model of critical liquid injection range is explained again.
Key words: ionic-type rare earth mine; glide force; anti-sliding force; slope safety factor; critical liquid injection range
