开切眼爆破掘进隐伏陷落柱滞后突水灾变规律研究  

Research on catastrophic law of delayed gushing water from subsided karst collapse column in the open-off cut blasting excavation

作　　者：杨宏飞 王文贞[2] YANG Hongfei;WANG Wenzhen(Yulin Shenhua Energy Co.,Ltd.,Yulin 719000,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]榆林神华能源有限责任公司,陕西榆林719000 [2]河南理工大学土木工程学院,河南焦作454000

出　　处：《矿业安全与环保》2023年第2期88-92,共5页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(5170818)。

摘　　要：为研究桃园煤矿1035开切眼爆破掘进过程中隐伏陷落柱的滞后突水灾变时空演化特征,基于爆破动荷载与流固耦合作用下围岩的渗透率突变特性,采用FLAC^(3D)软件对其应力、位移、塑性区,以及涌水量的变化规律进行数值模拟研究,探讨陷落柱影响带宽度对突水的影响。研究结果表明:在开切眼掘进工作面超过陷落柱中心10 m后,开切眼底板破坏塑性区将与隐伏陷落柱影响带贯通而导致陷落柱突水,其突水具有一定的滞后性、突发性及大量性;同时,只有当陷落柱影响带与桃园煤矿1035开切眼间距小于5 m时,开切眼爆破掘进才会引发突水事故。研究结果可为类似条件下的突水治理提供理论参考。In order to study the temporal and spatial evolution characteristics of the delayed gushing water of subsided karst collapse column during the blasting excavation process of 1035 open-off cut in Taoyuan Coal Mine,based on the permeability mutation characteristics of surrounding rock under the action of dynamic blasting load and fluid-solid coupling,the variation law of stress,displacement,plastic zone,and water inflow were numerically simulated by FLAC^(3D),and the influence of the width of the karst collapse column on gushing water was discussed.The research results show that:after the excavation face of open-off cut exceeds the karst collapsed column center by 10 m,the failure plastic zone of open-off cut floor will connect with the influence zone of subsided karst collapse column,resulting in gushing water from the karst collapsed column,and the gushing water has certain hysteresis,suddenness and large amount.At the same time,only when the distance between karst collapsed column impact zone and 1035 open-off cut of Taoyuan Coal Mine is less than 5 m,the open-off cut blasting excavation will cause a gushing water accident.The results can provide theoretical reference for gushing water treatment under similar conditions.

关 键 词：开切眼 隐伏陷落柱 滞后突水 爆破掘进 数值模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]