收稿日期: 2018-04-22
修回日期: 2018-06-16
网络出版日期: 2018-10-17
基金资助
国家自然科学基金面上项目“采场充填体的三维应力解析及其强度设计理论”(51774040);和国家自然科学基金青年基金项目“大体积松散体水泥—水玻璃浆液可控灌注机理实验研究”(41602365)
Experimental Study on the Law of Flow and Segregation of Filing Slurry in Stope
Received date: 2018-04-22
Revised date: 2018-06-16
Online published: 2018-10-17
为研究采场充填料浆流动规律及充填料浆离析分层对充填体强度的影响规律,开展了充填料浆流动相似模拟试验及采场原位充填体力学强度测试试验,研究结果表明:单点下料时充填料浆流动终态坡面趋向于正态分布。流动过程中充填料浆产生离析分层现象,主要表现为充填体物料的粒径沿料浆流动方向呈先增大后减小的趋势,充填体强度沿料浆流动方向呈先减小后增大再减小的倒转“S”形趋势。采场原位充填体强度在下料口附近与标准试块强度接近,在采场中间位置附近的充填体强度最小,在距离下料点采场长度7/10左右的位置充填体强度达到最大值。研究成果能够为充填采场下料管的数量及位置设计提供依据,从而保证充填体的整体质量。
史采星 , 郭利杰 , 陈鑫政 . 采场充填料浆流动与离析规律的试验研究[J]. 黄金科学技术, 2018 , 26(4) : 520 -527 . DOI: 10.11872/j.issn.1005-2518.2018.04.520
In order to study the flow law of filling slurry and the influence of filling slurry segregation on the strength of filling body,the simulation test of filling slurry flow and the mechanical strength test of the filling body in situ were carried out,which showed that the terminal slope of the filling slurry flow tends to the normal distribution.Segregation stratification generated in the process of filling slurry flow is mainly manifested as the particle size of the filling material decreases with the flow direction of the slurry,the filling strength decreases with the flow direction of the slurry flow,and in the trends of decreasing-increasing-decreasing as "S" inverted.The strength of the filling body is close to that of the standard test block in the vicinity of the feed opening,while the filling strength is the minimum near the middle of the slope,length at location near 7/10 of slope,the maximum.The research results can provide the basis for the design of the quantity and location of the filling pipe in the filling slope,so as to ensure the whole quality of the filling body.
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