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Time-dependent lateral pressure of the filling barricade for roadway cemented backfill mining technology
Mechanics of Time-Dependent Materials ( IF 2.5 ) Pub Date : 2019-01-07 , DOI: 10.1007/s11043-018-09405-w
Xuejie Deng , Jixiong Zhang , Bern Klein , Benjamin de Wit , Junwen Zhang

The filling barricade is one of the key components of roadway cemented backfill systems and this research focuses on critical factors influencing the performance of these systems, particularly the lateral stress characteristics and the stability of the filling barricade. In this paper, a theoretical model is presented and applied to obtain and calculate the lateral pressures exerted on the filling barricade and to understand the effects of the filling process. It is found that the yield stress of cemented backfill increases with curing time and this relationship can be described as an increasing power function. The lateral stresses exerted on the filling barricade increase over time during the filling period but decrease over time during the waiting period. Both the maximum lateral stress exerted on the filling barricade and the decreasing amplitude decrease as the number of filling rounds increases. In the calculation case, the maximum lateral stress declines from 0.161 MPa to 0.0148 MPa when the number of filling rounds increases from one to six. From these results, the filling process with three rounds is determined to be the optimal process scheme. In the first round, the lateral stress increases to 0.0369 MPa during the filling period and decreases to 0.0146 MPa during the waiting period; In the second round, the lateral stress increases to 0.0368 MPa then decreases to 0 MPa; in the third round, the lateral stress of the filling barricade stays at 0 MPa.



中文翻译:

巷道胶结回填开采技术中充填路障的时变横向压力

填充路障是道路胶结回填系统的关键组成部分之一,本研究着重于影响这些系统性能的关键因素,尤其是侧向应力特性和填充路障的稳定性。在本文中,提出了一个理论模型并将其应用于获得和计算施加在填充路障上的侧向压力并了解填充过程的影响。发现胶结回填的屈服应力随固化时间的增加而增加,这种关系可以描述为功率函数的增加。施加在填充路障上的侧向应力在填充期间随时间增加,而在等待期间随时间减少。随着充填弹数的增加,施加在充填路障上的最大侧向应力和减小的幅度都减小。在计算情况下,当填充回弹数从1增加到6时,最大横向应力从0.161 MPa降低至0.0148 MPa。根据这些结果,确定三轮充填过程为最佳过程方案。在第一轮中,横向应力在填充期间增加到0.0369 MPa,在等待期间减小到0.0146 MPa。在第二轮中,侧向应力增加到0.0368 MPa,然后减小到0 MPa;在第三轮中,填充路障的侧向应力保持在0 MPa。当填充弹数从一增加到六时为0148 MPa。根据这些结果,确定三轮充填过程为最佳过程方案。在第一轮中,横向应力在填充期间增加到0.0369 MPa,在等待期间减小到0.0146 MPa。在第二轮中,侧向应力增加到0.0368 MPa,然后减小到0 MPa;在第三轮中,填充路障的侧向应力保持在0 MPa。当填充弹数从一增加到六时为0148 MPa。根据这些结果,确定三轮充填过程为最佳过程方案。在第一轮中,横向应力在填充期间增加到0.0369 MPa,在等待期间减小到0.0146 MPa。在第二轮中,侧向应力增加到0.0368 MPa,然后减小到0 MPa;在第三轮中,填充路障的侧向应力保持在0 MPa。0368 MPa,然后降低到0 MPa;在第三轮中,填充路障的侧向应力保持在0 MPa。0368 MPa,然后降低到0 MPa;在第三轮中,填充路障的侧向应力保持在0 MPa。

更新日期:2019-01-07
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