三鑫金铜矿保安矿柱回收合理充填体强度研究

Research on the reasonable filling body strength for the recovery of security ore pillars in Sanxin Gold Copper Mine

为安全回收三鑫金铜矿的保安矿柱并保证充填采场的稳定性,对采场的合理充填体强度进行理论计算,并对不同充填体强度(灰砂比)下采场稳定性进行了数值模拟,确定了合理充填体强度。结果表明:采场充填体所需合理强度主要与采场长度和充填体高度有关,对于长度20~60 m、高度40 m的保安矿柱采场,充填体强度需达到3.5 MPa以上,其周边区域岩移量不超过2 mm,在设计规范允许的范围内,能够保障安全。

In order to safely recover the security ore pillars in Sanxin Gold Copper Mine and ensure the stability of filled stope,theoretical calculations were conducted on the reasonable filling body strength in the stope.Numerical simu-lations were performed on the stope stability under different filling body strengths(cement-sand ratio)to determine the reasonable range of filling body strength.The results indicate that the required strength of the filling body in the stope is mainly related to the length of the stope and the height of the filling body.For security ore pillar stopes with lengths ranging from 20 m to 60 m and a height of 40 m,the filling body strength needs to be above 3.5 MPa.The surrounding rock displacement should not exceed 2 mm,which falls within the allowable range specified by design standards,ensuring safety.