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| 1 | 深部软岩巷道深-浅耦合全断面锚注支护研究显示文摘基于对深部软岩巷道变形和破裂特征的长期监测结果,提出了以'中空注浆锚索和高强注浆锚杆'为核心的新型深-浅耦合全断面锚注支护技术体系.借助渗流力学理论建立了深-浅耦合锚注浆液的渗流基本方程,并结合COMSOL软件模拟再现了浆液在围岩内的渗透扩散过程.结果表明:注浆锚索和注浆锚杆所注浆液使巷道浅部围岩形成完整的锚注加固圈,而注浆锚索同时使巷道深部围岩形成局部锚注加固体,两者协调耦合作用,形成互为支撑的承载体,完善了深-浅耦合全断面锚注支护的理论体系和加固作用机理.现场监测证明该支护体系有效地控制了巷道围岩的变形与破坏. | 王连国 陆银龙 黄耀光 孙海洋 | 2016 | 中国矿业大学学报2016，45，1： | 71 |
| 2 | Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression显示文摘Pre-existing discontinuities change the mechanical properties of rock masses,and further influence failure behavior around an underground opening.In present study,the failure behavior in both Inner and Outer zones around a circular opening in a non-persistently jointed rock mass under biaxial compression was investigated through numerical simulations.First,the micro parameters of the PFC^(3D) model were carefully calibrated using the macro mechanical properties determined in physical experiments implemented on jointed rock models.Then,a parametrical study was undertaken of the effect of stress condition,joint dip angle and joint persistency.Under low initial stress,the confining stress improves the mechanical behavior of the surrounding rock masses;while under high initial stress,the surrounding rock mass failed immediately following excavation.At small dip angles the cracks around the circular opening developed generally outwards in a step-path failure pattern;whereas,at high dip angles the surrounding rock mass failed in an instantaneous intact rock failure pattern.Moreover,the stability of the rock mass around the circular opening deteriorated significantly with increasing joint persistency. | Yang Xuxu Jing Hongwen Chen Kunfu | 2016 | International Journal of Mining Science and Technology2016，26，4： | 6 |
| 3 | 煤体压剪破裂震源模型及远场震动特征显示文摘为了研究工作面煤体破裂造成的震动破坏效应,根据位错震源理论与动态断裂力学,建立了煤体压剪破裂震源模型,推导了煤体压剪破裂引起的震动位移场远场表达式.数值计算结果表明:随着煤体破裂速度的升高,远场P波、SH波和SV波的振幅逐渐增大.震动位移场远场空间分布特征显示P波分量主要集中在与破裂面成45°夹角的平面内,SH波和SV波分量主要集中在破裂面及其正交面内.在平行和垂直于破裂面的传播方向上,P波的衰减速度大于SH波和SV波且幅值小于SH波和SV波.工程实践中,需要注意防范P波对工作面巷帮造成层裂破坏和SH波、SV波对工作面两巷与顶底板结合处造成剪切破坏. | 冯俊军 王恩元 沈荣喜 陈亮 李学龙 李楠 | 2016 | 中国矿业大学学报2016，45，3： | 5 |
| 4 | 深埋隧道轴线合理布置与衬砌结构稳定性研究显示文摘深埋隧道常处于构造应力状态,且水平应力分布并不均匀。采用数值模拟和模型试验方法,研究自重应力场、水平大主应力与洞线平行和垂直、不同围岩级别隧道轴线选择对围岩和衬砌结构稳定性影响。水平大主应力与洞轴平行时,围岩最不利位置发生在边墙;水平大主应力与洞轴垂直时,围岩最不利出现在拱顶。水平地应力使得二次衬砌受力特征发生很大改变,自重应力条件下,衬砌首先发生裂缝部位为拱顶,发生压弯破坏,建议加强衬砌拱顶内侧纵向配筋,提高正截面抗拉能力。当大主水平应力与轴线垂直时,关键控制部位为墙脚,出现压剪破坏,应增设墙脚箍筋,提高抗剪承载力。规范提出隧道轴线宜与水平大主应力方向一致原则,是有适用条件的。研究成果可为深埋隧道设计、施工提供参考。 | 王俊奇 何本国 张有天 陈重华 | 2015 | 工程力学2015，32，12： | 4 |
| 5 | Dolomite fracture modeling using the Johnson-Holmquist concrete material model:Parameter determination and validation显示文摘In this paper,the Johnson-Holmquist concrete(JHC)constitutive model is adopted for modeling and simulating the fracture of dolomite.A detailed step-by-step procedure for determining all required parameters,based on a series of experiments under quasi-static and dynamic regimes,is proposed.Strain rate coefficients,failure surfaces,equations of state and damage/failure constants are acquired based on the experimental data and finite element analyses.The JHC model with the obtained parameters for dolomite is subsequently validated using quasi-static uniaxial and triaxial compression tests as well as dynamic split Hopkinson pressure bar(SHPB)tests.The influence of mesh size is also analyzed.It shows that the simulated fracture behavior and waveform data are in good agreement with the experimental data for all tests under both quasi-static and dynamic loading conditions.Future studies will implement the validated JHC model in small-and large-scale blasting simulations. | Michal Kucewicz Pawel Baranowski Jerzy Maachowski | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，2： | 4 |
| 6 | A numerical modelling approach to assess the behaviour of underground cavern subjected to blast loads显示文摘The paper gives an insight into the behaviour of large underground caverns which are subjected to blast loads. Caverns are generally constructed in hard rock formation which compels us to use blasting methods for the excavation works. Comparative study was done between models with intact rock mass and discontinuities to assess the stability of cavern as a result of blast loads. Numerical modelling was performed with 3 dimensional distinct element code(3 DEC) to analyse the performance of cavern walls in terms of displacement and to compute peak particle velocities(PPV) both around the cavern periphery and at surface of models. Results showed that the velocity wave with higher frequency exhibited large displacements around the periphery of cavern. Computation of PPV showed that model with horizontal joint sets showed lower PPV in comparison to model with intact rock mass. PPV values were also analysed on the surface for model consisting vertical joints spaced at 4 m intervals. Comparative study of PPV on surface vertically above the blast location between models with horizontal joints spaced at 4 m and vertical joints at 4 m intervals were conducted. Results depicted higher magnitudes of PPV for model with vertical joints in comparison to model with horizontal joints. | Saikat Kuili Vedala Rama Sastry | 2018 | International Journal of Mining Science and Technology2018，28，6： | 3 |
| 7 | 3-D discontinuum numerical modeling of subsidence incorporating ore extraction and backfilling operations in an underground iron mine in China显示文摘An underground iron mine in China has been used as a case-study to research the subsidence due to ore extraction and backfilling during open stoping operations. A 3-D discontinuum numerical model was built incorporating geologic complexities including faults and interfaces between different lithologies,and the stoping and backfilling sequence adopted from the mine plans. The stoping was carried out in two vertically stacked horizontal layers, with a total of 16 stopes. Large displacements of up to 50 cm were observed along the roof of the stopes, and a maximum surface subsidence of 22.5 cm was observed.Backfilling was found to eliminate subsequent displacements and subsidence. The extraction of the upper orebody was found to influence displacements in the lower orebody. Finally, a subsidence profile was constructed to show the subsidence at all locations along the length of the surface and region of influence on the surface. | Huang Gang Kulatilake Pinnaduwa H.S.W. Shreedharan Srisharan Cai Sijing Song Hongqing | 2017 | International Journal of Mining Science and Technology2017，27，2： | 1 |
| 8 | Preparation of Fine Cement Slurries by Wet-Ground Using a Pneumatic Colloid Mill显示文摘This study aims to investigate the preparation of fine cement slurries by wet-ground using a pneumatic colloid mill. A pneumatic colloid mill was designed and produced. Furthermore,ordinary Portland cement slurries were ground using the pneumatic colloid mill. Moreover,the fineness of ground cement slurries was studied. The particle sizes of ground cement slurries with various cumulated percent were all better than those of cement slurries before grinding. When water was used as the dispersant,the best average diameter of cement slurries was obtained by grinding for 10,and 15 min for cement slurries with water / cement ratio of 1∶ 1,and0. 9∶ 1,respectively. When ethanol was used as the dispersant,the particle sizes of all cumulated percent decreased gradually with the increasing grinding time,and the particle sizes of cumulated percent of D97 decreased rapidly with the increasing grinding time. The grinding effect of big particle sizes of cement slurries is better than that of small particle sizes. | 袁海滨 易伟欣 于弘奕 | 2015 | Journal of Donghua University(English Edition)2015，32，4： | 0 |
| 9 | Stability analysis and determination of rock pillar between two adjacent caverns in different regions of Asmari formation in Iran显示文摘Large underground caverns are commonly used in variety of applications. In many cases, because of the geomechanical limitations of dimensions and requirement of high volume, several parallel caverns are used. Plastic zone integration requires a larger rock pillar distance of theses adjacent caverns while economic and access reasons require smaller distance. In Iran many underground projects are located in West and South West. Asmari formation covers a large part of these regions. The stability of underground spaces that are constructed or will be constructed in this formation has been investigated. A proper cross section based on plastic analysis and a stability criterion has been proposed for each region. Finally, in each case, allowable rock pillar between adjacent caverns with similar dimension was determined with two methods(numerical analysis and fire service law). Results show that Fire Service Law uses a very conservative safety factor and it was proposed to use a correction factor for allowable distance based on application of underground space. | Abdollahipour Abolfazl Ghannadshirazi Hossein | 2014 | International Journal of Mining Science and Technology2014，24，5： | 0 |
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