高海拔排水巷断层突水突泥前兆信息演化规律数值模拟  

Numerical simulation of the evolution law of precursor information of water and mud bursts on high-altitude drainage lane faults

作　　者：古鹏 林开森 李佳建 GU Peng;LIN Kaisen;LI Jiajian(Tibet Julong Copper Industry Co.,Ltd.,Lhasa 850200,China;University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]西藏巨龙铜业有限公司,拉萨850200 [2]北京科技大学,北京100083

出　　处：《有色金属（矿山部分）》2024年第4期81-86,共6页NONFERROUS METALS(Mining Section)

基　　金：“十四五”国家重点研发计划项目(2022YFC2905003)。

摘　　要：目的:以西藏巨龙铜矿穿破碎带排水巷道施工为工程背景,分析断层突水突泥前兆信息演化规律。方法:通过数值模拟,探究了流固耦合作用下排水巷道施工至破碎带过程中围岩位移、应力、塑性区以及渗流场的变化规律,分析了巷道穿断层破碎带突水突泥前兆信息演化规律。结果:结果表明:巷道掘进至破碎带时,掌子面位移发生突变性增大。同时破碎带发生应力扰动。围岩塑性区向破碎带方向扩展,破碎带内岩体发生塑性变形,与掌子面塑性区贯通。巷道掘进至破碎带时,围岩内渗流场发生明显变化,被揭露的破碎带形成排水口,围岩水压骤然减小,巷道内容易发生突水突泥事故。意义:本文研究结果为巨龙排水巷穿破碎带施工提供了理论参考。Purpose:To analyze the evolution law of precursor information of water and mud breakout on faults by taking the construction of drainage roadway through the fracture zone of Julong copper mine in Tibet as the engineering background.Method:Through numerical simulation,we investigated the changing rules of displacement,stress,plastic zone,and seepage field of surrounding rock during the construction of drainage roadway to the crushed zone under the effect of fluid-solid coupling,and analyzed the evolution law of premonitory information of water and mud breakout in the roadway through the crushed zone of the fault.Result:The results show that when the roadway is excavated to the fracture zone,the displacement of the palm face increases abruptly.At the same time,stress disturbance occurs in the fracture zone.The plastic zone of the surrounding rock expands in the direction of the crushing zone,and the rock body in the crushing zone undergoes plastic deformation,which is connected with the plastic zone of the palm face.When the roadway is excavated to the crushing zone,the seepage field in the surrounding rock changes obviously,the exposed crushing zone forms a drainage outlet,the water pressure of the surrounding rock decreases suddenly,and the roadway is prone to sudden water and mud accidents.Significance:The results of this paper provide a theoretical reference for the construction of Julong drainage road through the crushed zone.

关 键 词：高海拔 突水突泥 数值模拟 演化规律 流固耦合 

分 类 号：TD853.3[矿业工程—金属矿开采]