黄金科学技术 ›› 2021, Vol. 29 ›› Issue (5): 669-679.doi: 10.11872/j.issn.1005-2518.2021.05.009

• 采选技术与矿山管理 • 上一篇    下一篇



  1. 中南大学资源与安全工程学院,湖南 长沙 410083
  • 收稿日期:2020-12-29 修回日期:2021-04-06 出版日期:2021-10-31 发布日期:2021-12-17
  • 通讯作者: 王少锋;
  • 作者简介:唐宇(1998-),男,湖南邵阳人,硕士研究生,从事深部硬岩破碎方面的研究工作。
  • 基金资助:

Analysis on Rock Breakage Characteristic and Its Influence Factors of Conical Pick Under Uniaxial Confining Stress

Yu TANG(),Shaofeng WANG()   

  1. School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China
  • Received:2020-12-29 Revised:2021-04-06 Online:2021-10-31 Published:2021-12-17
  • Contact: Shaofeng WANG;



关键词: 深部开采, 非爆机械化开采, 截齿破岩, 单向受限应力, 可切割性, 熵权法


With the gradual depletion of shallow resources,deep mining is an inevitable trend. However,the traditional drilling and blasting method has been difficult to meet the requirements of continuous,large-scale,safe,efficient and green resource exploitation in deep mining. Non-explosive mechanized mining based on cutting tool rock breaking will be one of the main alternative methods for deep mining. The cuttability of deep hard rock is the key factor to determine the non-explosive mechanical rock breaking. Therefore,we carried out the rock breaking experiment by conical pick and studied the rock cuttability under different confining pressures and rock properties. The experiment was performed on the TRW-3000 true triaxial electro-hydraulic servo test system designed and manufactured by Central South University. The system can simulate the stress conditions under uniaxial,biaxial and triaxial confining stress conditions. The maximum static load applied in XY and Z directions is 2 000 kN,2 000 kN and 3 000 kN respectively. The rock samples utilized in this experiment are granite,marble,red sandstone and phosphate rock,all of which are cubic rock samples with the size of 100 mm×100 mm×100 mm. In order to simulate the stress on the pillar to be mined,uniaxial confining pressure was applied to the rock sample on the Y-axis. The range of confining pressure of granite and marble is 0~120 MPa,that of red sandstone is 0~90 MPa,and that of phosphate rock is 0~100 MPa. Then,the rock breakage load is applied to rock specimen by conical pick through Z-axis,so as to cut the rock sample vertically. In the whole experiment process,the system recorded the load change on rock in the loading process automatically. According to the curve change,the peak indentation force and corresponding penetration depth of the pick were obtained,and the cutting work required for rock breaking could be obtained. Then,the specific energy of rock breaking could be calculated according to the cutting work and the volume of the spalling rock block. In addition,according to the ISRM standards,the uniaxial compressive strength and tensile strength of four types of rocks were obtained by uniaxial compression test and Brazilian splitting test. Then,the brittleness index of rock was obtained. The uniaxial compressive strength,brittleness index,peak indentation force and specific energy were normalized. Through regression analysis,the regression models of the relationships among the peak indentation force,rock strength characteristics and confining stress conditions,as well as the relationships among specific energy,rock strength characteristics and confining stress conditions were obtained. Finally,the entropy weight method was used to evaluate the influence weights of rock strength characteristics and confining stress conditions on the peak indentation force and specific energy. Through the above experimental study,regression analysis,and the weight determination,the necessary theoretical basis can be provided for the feasibility evaluation of non-explosive mechanized mining and the design of rock breaking parameter in deep mine. This study has important guiding significance for the realization of non-explosive mechanized mining in deep hard rock.

Key words: deep mining, non-explosive mechanized mining, rock breakage, uniaxial confining stress, rock cuttability, entropy weight method


  • TD80














Fc/kNEc/(10-3 J·cm-3Fc/kNEc/(10-3 J·cm-3Fc/F0Ec/E0Fc/F0Ec/E0







Abu Bakar M Z,Gertsch L S,Rostami J,2014.Evaluation of fragments from disc cutting of dry and saturated sandstone[J].Rock Mechanics and Rock Engineering,47:1891-1903.
Balci C,2009.Correlation of rock cutting tests with field performance of a TBM in a highly fractured rock formation: A case study in Kozyatagi-Kadikoy metro tunnel,Turkey[J].Tunnelling & Underground Space Technology, 24:423-435.DOI:
Balci C,Tumac D,2012.Investigation into the effects of different rocks on rock cutability by a V-type disc cutter [J].Tunnelling and Underground Space Technology,30:183-193.
Barton N,1999.TBM performance estimation in rock using QTBM[J].Tunnels and Tunnelling International,9:30-34.DOI:
Bilgin N,Algan M,2012.The performance of a TBM in a squeezing ground at Uluabat,Turkey[J].Tunnelling & Underground Space Technology,32:58-65.DOI:
Bilgin N,Copur H,Balci C,2012.Effect of replacing disc cutters with chisel tools on performance of a TBM in difficult ground conditions[J].Tunnelling & Underground Space Technology,27:41-51.
Chen Jingtao,Feng Xiating,2006.True triaxial experimental study on rock with high geostress[J].Journal of rock mechanics and Engineering,25(8):1537-1543.
Chen L H,Labuz J F,2006.Indentation of rock by wedge shaped tools[J].International Journal of Rock Mechanics and Mining Sciences, 43:1023-1033.
Copur H,Aydin H,Bilgin N,al et,2014.Predicting performance of EPB TBMs by using a stochastic model implemented into a deterministic model[J].Tunnelling & Underground Space Technology, 42:1-14.DOI: /10.1016/j.tust.2014.01.006.
doi: /10.1016/j.tust.2014.01.006
Dogruoz C,2010.Effect of Pick Blunting on Cutting Performance for Weak-moderate Rocks[D].Turkey:Middle East Technical University.
Dogruoz C,Bolukbasi N,2014.Effect of cutting tool blunting on the performances of various mechanical excavators used in low- and medium-strength rocks[J].Bulletin of Engineering Geology and the Environment,73(3):781-789.
Du Kun,2013.Study on the Failure Characteristics of Deep Rock and the Mechanism of Strain burst Under True Triaxial Unloading Condition[D].Changsha:Central South University.
Evans I,1974.Relative efficiencies of picks and discs for cutting rocks[C]//Proceedings of the Third ISRM Congress of the International Society for Rock Mechanics.Washington,D C:National Academy of Sciences.
Feng Xiating,Chen Bingrui,Ming Huajun,al et,2012.Evolution law and mechanism of rockbursts in deep tunnels:Immediate rockburst[J].Journal of Rock Mechanics and Engineering,31(3):433-444.
Feng Xiating,Wang Yongjia,1998.New development in researching rockburst induced by mining at great depth and its control strategies[J].China’s Mining Industry,7(5):42-45.
Geng Q,Wei Z Y,Meng H,2016.An experimental research on the rock cutting process of the gage cutters for rock tunnel boring machine(TBM)[J].Tunnelling & Underground Space Technology,52:182-191.
Gong Qiuming,She Qirui,Hou Zhesheng,al at,2010.Experimental study of TBM penetration in marble rock mass under high geostress[J].Journal of Rock Mechanics and Engineering,29(12):2522-2532.
He Manchao,Miao Jinli,Li Dejian,et al., 2007. Experimental study on rockburst process of deep granite samples[J].Journal of Rock Mechanics and Engineering,26(5):865-876.
Hucka V,Das B,1974.Brittleness determination of rocks by different methods[J].International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts,11(10):389-392.
Innaurato N,Oggeri C,Oreste P P,al et,2007.Experimental and numerical studies on rock breaking with TBM tools under high stress confinement[J].Rock Mechanics and Rock Engineering,40(5):429-451.
Li X B,Wang S F,Wang S Y,2018.Experimental investigation of the influence of confining stress on hard rock fragmentation using a conical pick[J]. Rock Mechanics and Rock Engineering,51:255-277.
Li Xibing,Cao Zhiwei,Zhou Jian,al et,2019.Innovation of mining models and construction of intelligent green mine in hard rock mine: In Kaiyang phosphate mine as an example[J].Transactions of Nonferrous Metals Society of China,29(10):2364-2380.DOI:
Li Xibing,Gu Desheng,2002.Disaster control and fragmentation mutation of high stress in deep mining of hard ore and rock [C]//Xiangshan Science Conference.Science Frontier and Future (Volume6). Beijing:China Environmental Science Press:192-201.
McFeat-Smith I,Fowell R J,1977.Correlation of rock properties and the cutting performance of tunneling machines [C]//Proceedings Conference on Rock Engineering,Newcastle Upon Tyne.UK:British Geotechnical Society and Department of Mining Engineering.
Rostamsowlat I,Richard T,Evans B,2018.Experimental investigation on the effect of wear flat inclination on the cutting response of a blunt tool in rock cutting[J].Acta Geotechnica,14:519-534.
Sun Jinshan,Chen Ming,Chen Baoguo,al et,2011.Numerical simulaiton of influence factors for rock fragmentation by TBM cutter[J].Geotechnical Mechanics,32(6):1891-1897.
Wang S F,Li X B,Du K,al et,2018.Experimental investigation of hard rock fragmentation using a conical pick on true triaxial test apparatus[J].Tunnelling & Underground Space Technology,79:210-223.
Wang S F,Li X B,Yao J R,al et,2019.Experimental investigation of rock breakage by a conical pick and its application to non-explosive mechanized mining in deep hard rock[J]. International Journal of Rock Mechanics and Mining Sciences,122:104063.
Wang Shaofeng,Li Xibing,Gong Fengqiang,al et,2021. Breakage characteristics and mechanized mining experiment in deep hard rock[J].Journal of Central South Unive-rsity(Science and Technology),52(8):2772-2782.
Xia Yimin,Wu Yuan,Guo Jincheng,al et,2014.Numerical simulation of rock-breaking mechanism by gage disc cutter of TBM[J].Journal of Coal Industry,39(1):172.
Yagiz S,2008.Utilizing rock mass properties for predicting TBM performance in hard rock condition[J].Tunnelling and Underground Space Technology,23:326-339.
冯夏庭,陈炳瑞,明华军,等,2012.深埋隧洞岩爆孕育规律与机制:即时型岩爆[J].岩石力学与工程学报, 31(3):433-444.
[1] 王少锋, 李夕兵. 深部硬岩可切割性及非爆机械化破岩实践[J]. 黄金科学技术, 2021, 29(5): 629-636.
[2] 景岳,王少锋,鲁金涛. 矿岩开挖松动区厚度预测及非爆机械化开采判据[J]. 黄金科学技术, 2021, 29(4): 525-534.
[3] 石勇,史秀志,丁文智. 基于改进熵权法—未确知测度模型的黄金洞尾矿库综合安全评价[J]. 黄金科学技术, 2021, 29(1): 155-163.
[4] 王猛, 史秀志, 张舒. 面向产能优化的地下金属矿山安全保障条件评价研究[J]. 黄金科学技术, 2020, 28(5): 753-760.
[5] 周科平, 侯霄峰, 林允. 基于综合决策云模型的围岩稳定性分级方法研究[J]. 黄金科学技术, 2020, 28(3): 372-379.
[6] 胡建华,徐朔寒,徐泽林,韩磊. 城市地下矿山采矿方法的数值与熵权耦合优选[J]. 黄金科学技术, 2019, 27(4): 513-521.
[7] 崔宇,李夕兵,董陇军,白吕. 玲珑金矿微震监测台网布设优化[J]. 黄金科学技术, 2019, 27(3): 417-424.
[8] 王春,王成,熊祖强,程露萍,王怀彬. 动力扰动下深部出矿巷道围岩的变形特征[J]. 黄金科学技术, 2019, 27(2): 232-240.
[9] 杨世兴,付玉华,占飞. 围压与料浆浓度对尾砂充填体峰后损伤演化研究[J]. 黄金科学技术, 2019, 27(1): 97-104.
[10] 陈冲,李夕兵,冯帆. 诱导巷道的围岩松动破坏区数值研究[J]. 黄金科学技术, 2018, 26(6): 771-779.
[11] 吴德明,杨珊,王喜梅. 一种改进的尾矿库安全和谐度方程评价方法[J]. 黄金科学技术, 2018, 26(5): 662-668.
[12] 卢富然, 陈建宏. 基于AHP和熵权TOPSIS模型的岩爆预测方法[J]. 黄金科学技术, 2018, 26(3): 365-371.
[13] 周海林,杨珊,陈建宏*. 黄金矿山清洁生产评价指标体系研究与应用[J]. 黄金科学技术, 2017, 25(5): 93-100.
[14] 贾敏涛,汪群芳,吴冷峻. 深部开采热环境控制技术研究现状及展望[J]. 黄金科学技术, 2017, 25(2): 83-88.
[15] 张洪山,宋文志,李秋涛,赵兴东,李洋洋,刘强. 山东金青顶矿区深部矿体开采诱发微震活动分析[J]. 黄金科学技术, 2016, 24(1): 76-79.
Full text



No Suggested Reading articles found!