上向水平分层充填体的强度模型及应用

上向水平分层充填采矿法是国内外应用广泛的一种采矿方法,充填体的主要作用是提供上向回采的工作平台,充填体强度需满足高效无轨设备的运行条件。为了更准确地分析上向水平分层充填体的作用机理,以建立更合适的上向水平分层充填体强度模型,本研究将充填体分为胶结层和尾砂充填体2部分进行研究。通过对无轨设备动荷载下充填体的作用机理和受力分析,参照路基路面工程中关于路基路面的设计原理,选取半正弦脉冲荷载来表示车辆荷载模型轮载的动态作用,运用弹性力学方法建立了相应的充填体强度模型,总结出无轨设备荷载下胶结充填体厚度的设计方法。并应用于大红山铜矿西矿段上向水平分层充填体的强度设计的胶结层的厚度设计,实践证明该模型是合理可靠的。

Strength Model of the Upward Horizontal Slicing Backfilled Body and Its Application

The upward horizontal slicing mining method is a kind of mining method widely used at home and abroad，and the main purpose of backfilled body is to provide the upward mining work platform.The strength of backfilled body should fulfill the operating conditions of efficient trackless equipment.In order to analyze the mechanism of the upward horizontal slicing backfilled body more accurately，and to establish a more appropriate strength model of the backfilled body，the backfilled body are classified into two parts to make study，namely the cemented layer and the tailing backfilled body.According to the action mechanism and the stress analysis of backfilled body under the vehicle dynamic load，a half sine pulse load is selected to represent the dynamic role of wheel load vehicle load model，by referring to subgrade and pavement design principle in subgrade pavement engineering.The corresponding strength model is worked out using elastic mechanics method，and the thickness design method of the cemented backfilled body under trackless equipment load is concluded.This model is applied in the strength design for the upward horizontal slicing backfilled body of west ore block in Dahongshan copper mine.The practice proves that this model is reasonable and reliable.