第 47卷 第 1期 西安建筑科技大学学报 (自然科学版)
201 5年2月 J．Xi’an Univ．ofArch．＆Tech．(Natural Science Edition)
DOI：10．15986／j．1006—7930．2015．01．019
V01．47 No．1
Feb．2O15
岩 爆 倾 向 岩 石 巷 帮 钻 孑L爆 破 卸 压 的 静 态 模 拟
李 俊 平 ， 王 红 星 ， 王 晓 光 ， 程 贤 根
(西安建筑科技大学材料与矿资学院，陕西 西安 7 1 0055)
摘要：冲击地压、大变形或分区破裂化正成为我国深部开采的难题．高地压是导致冲击地压、大变形或分区破裂化的根源．钻
孔爆破卸压是转移或释放高地压的有效措施 ．以厂坝铅锌矿灰岩为样本，应用FLAC。。静态模拟巷道掘进中巷帮钻孔卸压的
钻孔间距、钻孔深度及有无孔底爆破的卸压效果．研究表明：巷道埋深越深，支承压力越大，钻孔间距也将越大；钻孔深度
介于支承压力峰值与支承压力区最大宽度所处的位置之间；仅钻孔而不孔底爆破的卸压效果不明显．上述研究规律应用于文
峪金矿、豫灵镇某万米平巷和东桐峪金矿的灰岩、大理岩巷道掘进，成功控制了岩爆飞石 ．巷道穿过无岩爆倾向的岩石，如
煌斑岩时，尽管不会发生岩爆，但是将它们的钻孔间距、钻孔深度较岩爆倾向地段增大 0．5～1．0 m并类似孔底爆破，可以确
保支承压力持续向围岩深部转移或部分释放，避免巷帮因应力集中而发生开裂或片帮．
关键词 ：采矿工程；岩爆控制；支承压力；爆破卸压；钻孔卸压；钻孔爆破卸压；数值模拟
中图分类号：TD324 文献标志码：A 文章编号：1006—7930(2015)01—097—06
Static num erical sim ulation of drilling ＆ blasting pressure relief of
burst—prone rocks in tunnel wall
LIJunping，WANG Hongxing，WANGXiaoguang，CHENGXiangen
(School ofMaterials and Mineral Resources，Xi’an University ofArchitecture and Technology,Xi’all 710055，China1
Abstraet：Rockburst，large de formation and zonal fracturing are becoming technical problems for deep mining in China．High ground pressure is the root cause of rockburst。large deformation and zonal fracturing．Moreover drilling and blasting pressure relief
is an effective measure for transferring the abutment pressure Deak to deep rock masses and release part concentrated stress．Taking Changba lead zinc mine limestone as a sample．the drilling space and depth for drilling pressure relief in tunnel wal1．and the effects
of stress relief with and without bottom—blasting are numerically simulated by FLAC ．Research shows that the deeper overbur—
den．the greater abutment pressure，and the borehole space should be larger．The drilling depth for blasting pressure relief lies be—
tween the position of abutment pressure peak and the maximum width of abutment pressure zone．In addition，the pressure relief
effect is insignificant as compared with drilling without borehole bottom blasting．The contro1 measures following the above men— tioned research rules are applied at limestone and marble tunnels in Wenyu gold mine．a myriameter adit in Yuling town and
Dongtongyu gold mine．Though rock burst does not occur when tunnelling in no burst·prone rock masses，such as lamprophyre，due to their borehole space and depth increasing 0．5-1．0 m than the location where distressing is needed．it can also reach a
岩爆倾向岩石巷帮钻孔爆破卸压的静态模拟（论文）.pdf
