Gold Science and Technology
img

Wechat

Adv. Search
Online Submission Peer Review Office Work

Gold Science and Technology ›› 2019, Vol. 27 ›› Issue (4): 565-572.doi: 10.11872/j.issn.1005-2518.2019.04.565

• Mining Technology and Mine Management • Previous Articles     Next Articles

Study on Blasting Parameters of Pre-reserved Smooth Blasting Layer Under In-situ Stress and Double Damage

Weihua WANG1(),Tengfei SUN1(),Xitao LIU2   

  1. 1. School of Resources and Safety Engineering，Central South University，Changsha 410083，Hunan，China
    2. Jiaojia Gold Mine，Shandong Gold Mining (Laizhou) Co. ，Ltd. , Laizhou 261400，Shandong，China
  • Received:2018-11-07 Revised:2019-03-22 Online:2019-08-31 Published:2019-08-19
  • Contact: Tengfei SUN E-mail:2071731032@qq.com;1772531078@qq.com

RichHTML

1

PDF (PC)

617

Abstract:

For underground mining，the reserved blasting layer for secondary blasting can ensure the contouring effect of the roadway face and reduce the surrounding rock damage.When using the reserved photo-explosive layer for roadway blasting，the influence of the initial stress field redistribution on the blasting crack propagation，the damage of the inner ring blasting to the reserved photo-explosive layer，and the stress wave during the blasting of the photo-explosive layer should be considered.Based on the interaction theory of ground stress，stress wave and explosive gas，the parameters of the secondary blasting of the reserved photo-explosive layer are optimized.The influence of the thickness of the reserved photo-explosive layer on the redistribution of ground stress and the influence of the secondary stress on the crack propagation of the explosion are analyzed.It is known that the secondary stress will inhibit the crack propagation and the thickness of the photo-explosive layer and the secondary stress are positive correlation，therefore，in the construction of the project，the thickness of the photoburst layer should be reserved for the secondary blasting.The thickness of the blast layer should not be too large.The analysis should not consider the damage，consider one damage and consider the double damage conditions，the axial non-coupling coefficient and the blasthole.The change in the size of the gap makes it possible to appropriately increase the axial uncoupling coefficient and the blast hole spacing in consideration of the damage.Taking the deep mining project of Jiaojia gold mine as the background，compared with the blasting effect before and after the optimization of blasting parameters，it can be seen that considering the ground stress and damage in deep mining，the porosity and cost can be improved.The research results provide a theoretical basis for the standardization of underground mining blasting，which can provide reference for similar projects.

Key words: double damages, crustal stress, hole spacing, uncoupling coefficient, blasting layer

CLC Number: 

  • TU45

Fig.1

Stress distribution of primary rock and secondary rock under smooth blasting condition"

Fig.2

Stress distribution between adjacent gun holes in the reserved optical explosion layer"

Fig.3

Relation between the thickness of the reserved optical explosion layer and the stress in the direction of the adjacent peripheral holes"

Fig.4

Blasting damage cloud map"

Fig.5

Effect of the thickness of photodetonation layer on the axial uncoupling coefficient under different conditions"

Fig.6

Influence of axial uncoupling coefficient on the spacing of adjacent peripheral holes under different conditions"

Fig.7

Diagram of site construction and blasting results"

1 马芹永 .光面爆破炮眼间距及光面层厚度的确定[J].岩石力学与工程学报，1997，1（6）：590-594.
Ma Qinyong .Definition of hole space and burden in smooth blasting[J].Chinese Journal of Rock Mechanics and Engineering，1997，1（6）：590-594.
2 费鸿禄，洪陈超 .应力波和爆生气体共同作用下裂隙区范围研究[J].爆破，2017，34(1)：33-36，107.
Fei Honglu ， Hong Chenchao . Study on crushed and fracture zone range under combined action of stress and detonation gas[J]. Blasting，2017，34(1)：33-36，107.
3 杨仁树，丁晨曦，王雁冰，等 .爆炸应力波与爆生气体对被爆介质作用效应研究[J].岩石力学与工程学报，2016，35(增2)：3501-3506.
Yang Renshu ， Ding Chenxi ， Wang Yanbing ，et al . Action-effect study of medium under loading of explosion stress wave and explosion gas[J].Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.2)：3501-3506.
4 徐颖，孟益平，宗琦，等 .断层带爆炸裂隙区范围及裂纹扩展长度的研究[J].岩土力学，2002,23(1)：81-84.
Xu Ying ， Meng Yiping ， Zong Qi ，et al .Study on range of cranny and length of fissure expansion in fault zone[J]. Rock and Soil Mechanics，2002,23(1)：81-84.
5 胡建华，杨春，周炳任，等 .巷道压顶光面爆破裂隙扩展模拟及参数优化[J].黄金科学技术，2017，25(2)：45-53.
Hu Jianhua ， Yang Chun ， Zhou Bingren ，et al .Simulation of fracture propagation and optimization of parameters for smooth blasting of coping in roadway[J]. Gold Science and Technology，2017，25(2)：45-53.
6 谢全敏，殷建强，杨文东，等 .基于Hoek-Brown方程的边坡光面爆破参数设计方法[J].中国铁道科学，2017，38(2)：1-5.
Xie Quanmin ， Yin Jianqiang ， Yang Wendong ，et al .Design method for slope smooth blasting parameters based on hoek-brown equation[J].China Railway Science，2017，38(2)：1-5.
7 戴俊 .深埋岩石隧洞的周边控制爆破方法与参数确定[J].爆炸与冲击，2004,24(6)：493-498.
Dai Jun . The controlled contour blasting technique and its parameter determination for rock tunnel at depth[J]. Explosion and Shock Waves，2004,24(6)：493-498.
8 戴俊，杨永琦 .光面爆破相邻炮孔存在起爆时差的炮孔间距计算[J].爆炸与冲击，2003,23(3)：253-258.
Dai Jun ， Yang Yongqi .Calculation of shot hole separation in smooth blasting[J]. Explosion and Shock Waves，2003,23(3)：253-258.
9 戴俊，杨永琦 .软岩巷道周边控制爆破的研究[J].煤炭学报，2000,25(4)：374-378.
Dai Jun ， Yang Yongqi . Study on the controlled perimeter blasting for drift in soft rock[J]. Journal of China Coal Society，2000,25(4)：374-378.
10 宗琦，陆鹏举，罗强 .光面爆破空气垫层装药轴向不耦合系数理论研究[J].岩石力学与工程学报，2005,24(6)：1047-1051.
Zong Qi ， Lu Pengju ， Luo Qiang . Theoretical study on axial decoupling coefficients of smooth blasting with air cushion charging construction[J].Chinese Journal of Rock Mechanics and Engineering，2005,24(6)：1047-1051.
11 Satapathy S .Dynamic spherical cavity expansion in brittle ceramics[J].International Journal of Solids and Structures，2001(38)：5833-5845.
12 Sher E N ， Aleksandrova N I .Dynamics of microfailures in elastic zone during explosion of spherical charge in rock[J].Journal of Mining Sciences，2001(5)：475-481.
13 白羽 . 地应力影响下岩石爆破损伤模型及其数值试验[D].沈阳：东北大学，2014.
Bai Yu .Blasting Damage Model and Numerical Test of Rock under Effect of in situ Stress[D]. Shenyang:Journal of Northeastern University，2014.
14 付玉华，李夕兵，董陇军 .损伤条件下深部岩体巷道光面爆破参数研究[J].岩土力学，2010，31(5)：1420-1426.
Fu Yuhua ， Li Xibing ， Dong Longjun . Analysis of smooth blasting parameters for tunnels in deep damaged rock mass[J]. Rock and Soil Mechanics，2010，31(5)：1420-1426.
15 陈俊桦，张家生，李新平 .基于岩石爆破损伤理论的预裂爆破参数研究及应用[J].岩土力学，2016，37(5)：1441-1450.
Chen Junhua ， Zhang Jiasheng ， Li Xinping .Study of presplitting blasting parameters and its application based on rock blasting-induced damage theory[J]. Rock and Soil Mechanics，2016，37(5)：1441-1450.
16 吴小萍，唐冬冬，费广海，等 .爆破损伤效应对浅埋隧道稳定性的影响[J].华中科技大学学报(自然科学版)，2016，44(12)：25-30.
Wu Xiaoping ， Tang Dongdong ， Fei Guanghai ，et al .Effects of blasting induced damage on the stability of shallow tunnels[J].Journal of Huazhong University of Science and Technology(Natural Science Edition)，2016，44(12)：25-30.
17 杨小林，王树仁 .岩石爆破损伤断裂的细观机理[J].爆炸与冲击，2000,20(3)：247-252.
Yang Xaolin ， Wang Shuren . Meso mechanism of damage and fracture on rock blasting[J].Explosion and Shock Waves，2000,20(3)：247-252.
18 高磊 .矿山岩体力学[M].北京：冶金工业出版社，1979：84-87.
Gao Lei .Mine Rock Mass Mechanics[M].Beijing：Metallurgical Industry Press，1979：84-87.
19 李夕兵 .凿岩爆破工程[M].长沙：中南大学出版社，2011.
Li Xibing .Rock Drilling and Blasting Engineering [M].Changsha：Central South University Press，2011.
20 汪旭光 .爆破设计与施工[M].北京：冶金工业出版社，2011.
Wang Xuguang .Blasting Design and Construction[M].Beijing： Metallurgical Industry Press，2011．
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] HU Qin-Xia, LI Jian-Zhong, YU Guang-Meng, XIE Yan-Fang, ZHANG Ku-Xiao. Discussion on Gold Ore Point of Bailongjiang Metallogenic Belt[J]. J4, 2010, 18(3): 51 -53 .
[2] JIANG Qi, WANG Rong-Chao. [J]. J4, 2010, 18(4): 37 -40 .
[3] ZHANG Feng-Xia, CHENG You-Fa, ZHANG Zhi-Gang, YAN Fei. [J]. J4, 2010, 18(4): 75 -79 .
[4] LIU Yu-Meng, LIU Nan, ZHANG Jie, SONG Yu-Bei, GONG Long-Ji, WANG Gang, LIU Xiao, ZHANG Hai-Fang. Study on Structure Characteristics and Ore-prospecting Direction of Yinggezhuang Gold Deposit[J]. J4, 2010, 18(6): 26 -29 .
[5] GENG A-Jiao, DUAN Jian-Hua. Analysis on the Ore-controlling Factors and Prospecting of Manzhanggang Gold Mine[J]. J4, 2010, 18(6): 34 -37 .
[6] ZHANG Zhiguo, HU J iuhai, L IU Tao. Geolog ical Features and Prospecting  Direction of Pangka imen Gold Deposit, Middle of Daxing′anling[J]. J4, 2008, 16(1): 43 -47 .
[7] ZHAO hai, CHUI xuewu, XUN lunxian. Discussion On Geology and Isotope Characters of J iusangou Gold Deposit  in Wangq ing, J ilin Prov ince[J]. J4, 2008, 16(1): 48 -51 .
[8] ZHANG Huaquan，ZHANG Weixin，LI Hongjie. Ore—-formation Conditions and Exploration Orientation of the Gold Deposite in Jiaolai Basin，Shandong Province[J]. J4, 2008, 16(2): 12 -17 .
[9] LIU Tao，YAN Yongsheng. Geological Characteristics and Analysis of the Regional M ineralizing Conditions of Sanshierzhan Gold Deposit in Shabaosi Gold Field，Heilongjiang Provinc[J]. J4, 2008, 16(2): 33 -36 .
[10] LIANG Guoqing，CHEN Yingfu，XU Xuming，BAI Junwu，PAN Zhimin. Structural Environment and Emplacement M echanism of Xiaoyingzi Terrene，Hebei Province[J]. J4, 2008, 16(2): 43 -45 .

©2018 Gold Science and Technology　

Telephone：0931-8277791　

E-mail: hjkx@lzb.ac.cn Postcode：730000　

Powered by Beijing Magtech Co. Ltd

陇ICP备17001318号-1