Abstract
Chengmenshan Copper SulphurMine, one of the of the large-scale open pit mine in China, the engineering geology and hydrogeology in the Southern slope of t he mine is very complicated and the contact plane between two kinds of sandstone’s form soft-weak layer. Field investigations and reports by operators demonstrated that some instability problems might o ccur in the southern slope which is situated in zon e I and zone II. Southern slope was divided into six se ctions (I-0, I-1, I-2, II-0, II-1 and II-2) to make the analysis. Slope stability analyses using limit equi librium and numerical showed that the safety factor s of some section are very low (section I-0, I-1, I-2 ) as a result of this, failure is likely to happen. Therefore reinforcement is very important to increa se the safety factor of the three sections, two methods were used; Grouting to increase the slope c ohesion (c) and Pre-stressed Anchor then the factor of safety increased more than 1.15.
Highlights
The east, west and north side of Chengmenshan continues to increase the slope deformation and failure Copper-Sulfur mine is surrounded by lake’s water; the mode has close relationship with regional geological South side is only land and transportation road of the structure characteristics and the rock mass
Field investigations and reports by operators demonstrated that some instability problems might occur in the southern slope which is situated in zone I and zone II
According to the geotechnical study the mine was classified into 6 zones of engineering geology (I, II, III, IV, V and VI) as shown in “Fig. 3”
Summary
Of 1250 m, length of 1400 m and depth till 430 m). As the mining methods turning from open pit mining overall slopes angle is about 50°. Chengmenshan Copper Sulphur Mine “Fig. 1” is located in Chengmen County are F1 faults which run from east to west and anti-dip against the open pit near the southern slope. The slope which lies about 18 km far from the west-south of Jiu consists mainly of two kinds of sandstone’s of. Jiang Xi province, China, 6 km far from Yangtze River. Because of the weathering the contact plane between two kinds of Sandstone’s of Shamao formation (S3s) and Wutong formation has formed soft-weak layers a very low strength, the soft-weak layer is basically parallel to the dip of slope and seriously threat the stability of slope
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
