摘要
阿舍勒铜矿采用大直径深孔阶段空场嗣后充填法回采工艺,矿房充填体作为二步骤采场回采时的围岩,其强度和稳定性关系到二步骤采场回采的安全和经济效益。以0 m中段北1#采场为试验采场,采用多种理论计算方法对矿房充填体的稳定性进行了计算和分析。建立数值计算模型,基于Phase 2软件从位移、应力及塑性区进行模拟计算。结果表明,矿房采场的设计充填强度能满足二步骤采场回采强度要求。采场开挖后,其两侧帮充填体整体位移量较小,最大主应力普遍小于充填体的极限抗压强度,塑性区分布范围有限,且拉伸破坏区域未出现大范围相互贯通,矿房充填体稳定性较好,二步骤开采出现充填体大范围垮塌、冒落的可能性小。
The large-diameter long-holes stage open stope and backfill method is used in Ashele Copper Mine.The filling body is used as the surrounding rock of the two-step mining,and its strength and stability are related to the safety and economic benefits of the two-step mining.In this paper,a variety of theoretical calculation methods were used to calculate and analyze the stability of the filling body in the 0 m middle North 1#mining room.The numerical calculation model was established,and the simulation were carried out from the displacement,stress and plastic zone based on Rocsience-phase 2 software.The comprehensive analysis shows that the designed filling strength of the mining filed was reasonable for the two-step mining.After the excavation of the test stope,the overall displacement of the filling body on both sides was small,and the maximum principal stress was generally less than the ultimate compressive strength.The distribution range of the plastic zone was limited,and the tensile failure area did not appear to be interconnected in a large range,indicating that the stability of the filling body was reliable and the possibility of large-scale collapse and caving of the filling body was small in the two-step mining.
作者
文兴
赵亮
黄敏
WEN Xing;ZHAO Liang;HUANG Min(Changsha Institute of Mining Research,Changsha 410012,China;State Key Laboratoriy of Metal Mine Safety Technology,Changsha 410012,China)
出处
《矿冶》
CAS
2021年第4期1-6,19,共7页
Mining And Metallurgy
基金
国家重点研发计划重点专项(2017YFC0S04106)。
关键词
阿舍勒铜矿
充填体
数值模拟
稳定性分析
二步骤回采
Ashele Copper Mine
filling body,numerical simulation,stability analysis,two-step mining
