爆破荷载下新型胶凝原料胶结分级尾砂充填采场的动态响应分析  

Dynamic Response of New Cementitious Material Pasted Backfill under Explosion Loading

作　　者：何文[1] 秦政 王成[2] 赵奎[1] 石文芳[1] 宁建国[2] HE Wen;QIN Zheng;WANG Cheng;ZHAO Kui;SHI Wen-Fang;NING Jian-Guo(School of Resources and Environmental Engineering, Jiangxi University of Science and Technology ,Ganzhou 341000, China;State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《高压物理学报》2017年第6期803-812,共10页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(51604127);江西省重点研发计划重点项目(20161BBG70077);江西省自然科学基金(20171BAB206021)

摘　　要：某矿山在下向分层胶结充填采矿法中拟采用新型胶凝原料GSX代替水泥,为了研究爆破振动是否对新型尾砂胶结充填体顶板造成损伤,在爆破振动试验、理论基础分析、实验结果回归分析的基础上,采用FLAC3D软件模拟了回采进路巷道顶板充填体在爆破振动荷载下的动态响应,对3种方案制备的充填体(水泥胶结充填体、灰砂比为1∶6和1∶12的新型尾砂胶结充填体、灰砂比为1∶8的新型尾砂胶结充填体)的稳定性进行对比。模拟结果表明:当爆破振动荷载相同时,水泥胶结充填体和新型尾砂胶结充填体在x、y、z方向的峰值振速差别不大;灰砂比为1∶6和1∶12的新型尾砂胶结充填体的振速略大于水泥胶结充填体,且差值在6.8%以内;灰砂比为1∶8的新型尾砂胶结充填体的振速略小于水泥胶结充填体。因此,以GSX胶结剂为新型胶凝原料,选用两种充填方案,均可达到原工程爆破设计要求。To study the effect of the explosion caused vibration on the roof of the pasted backfill, which use a new cementitious material agent as the backfilled agent in substitution of cement in the down- ward slicing drift mining, we first conducted blasting test, theoretical analysis and test data regression analysis, and then simulated the dynamic response of the new pasted backfill under explosion loading using the FLACaD software. The simulation results show that, under the same explosion loading, the peak particle velocities in x,y,z directions of the new pasted backfill with cement-sand ratio 1 ： 6 and 1 ： 12 is slightly larger than those of the cemented pasted backfill and their difference is within 6.8%; while the peak particle velocities of the new pasted hackfill with cement-sand ratio 1 ： 8 is slightly lower than those of the cemented pasted backfill. It can thus be concluded that the new cementitious material agent can be used for backfill mining with the requirements equally well satisfied of the origi- nal engineering blasting design.

关 键 词：爆破荷载 胶结充填体 FLAC3D模拟 顶板稳定性 

分 类 号：O383.1[理学—流体力学] TD85[理学—力学]