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锚杆支护对围岩碎裂区的作用分析 被引量:8
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作者 马全礼 代进 李洪 《矿山压力与顶板管理》 北大核心 2005年第1期42-43,46,共3页
本文对围岩碎裂区在锚杆支护作用下的影响及稳定性作了一些探讨。给出了锚杆支护的支护强度计算公式并讨论了碎裂区保持稳定与锚杆支护强度的关系。
关键词 锚杆支护 碎裂区 支护强度
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热化组分模型(TCM)中碎裂区特性研究
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作者 杜晓超 王朝稳 +1 位作者 熊伟 陈志勇 《三峡大学学报(自然科学版)》 CAS 2009年第6期110-112,共3页
在前期热化组分模型的讨论中,系统讨论了中心热化区的相关特性,而对两边碎裂区的相关性质还未充分讨论.在前期工作的基础上,进一步讨论了碎裂区的相关特性,初步定量得到了碎裂区变化规律,对TCM模型进一步进行了完善.
关键词 TCM RHIC能 碎裂区
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从高山乳胶室族事例研究强相互作用在碎裂区的特征
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作者 陈江川 陆穗苓 +1 位作者 朱清棋 霍安祥 《高能物理与核物理》 CSCD 北大核心 1995年第6期494-499,共6页
利用高山乳胶室小族事例,分析了族内簇射能谱指数与族的流强的关系.蒙特卡洛模型很好地再现了实验现象的主要特征,说明在1014—1015eV能区强相互作用在碎裂区的行为没有剧烈变化.
关键词 高山乳胶室 族事例 强相互作用 碎裂区
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高能强子相互作用的碎裂区行为
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作者 丁林塏 《高能物理与核物理》 CSCD 北大核心 1990年第5期399-406,共8页
在SppS能量,分析了强子相互作用的碎裂区是否存在Feynman scaling的问题.讨论了碎裂区scaling破坏的证据以及破坏的程度.对宇宙线超高能现象研究中经常使用的几类模型进行了检验和讨论.
关键词 强子 相互作用 碎裂区 宇宙线
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新型空心钢管支护与空心螺纹管支护的作用效果分析
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作者 冯世华 闫亚军 《现代矿业》 CAS 2023年第4期69-72,共4页
通过试验对比新型空心钢管支护与空心螺纹钢管支护对碎裂区的支护效果,为新型材料的应用提供参考。试验结果表明,新型空心钢管支护的应力相对于空心螺纹钢管减小了22.2%~28.6%,支护体周边的松动圈范围缩小了23.5%~36.4%;在支护期间,新... 通过试验对比新型空心钢管支护与空心螺纹钢管支护对碎裂区的支护效果,为新型材料的应用提供参考。试验结果表明,新型空心钢管支护的应力相对于空心螺纹钢管减小了22.2%~28.6%,支护体周边的松动圈范围缩小了23.5%~36.4%;在支护期间,新型空心钢管的支护应力随着碎裂区的增大而增加,其内部填充材料具有一定的缓冲作用,能够抑制碎裂区的快速发育,从而减小松动圈的范围。新型空心钢管支护技术在控制围岩变形上优势更明显。 展开更多
关键词 空心钢管 碎裂区 松动圈 支护应力
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Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China 被引量:5
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作者 MENG Chen NIU Jian-zhi +3 位作者 YIN Zheng-cong LUO Zi-teng LIN Xing-na JIA Jing-wei 《Journal of Mountain Science》 SCIE CSCD 2018年第3期519-531,共13页
Rock fragments have major effect on soil macropores and water movement. However, the characteristics of rock fragments and their relationship with macropore characteristics remain elusive in forest stony soils in nort... Rock fragments have major effect on soil macropores and water movement. However, the characteristics of rock fragments and their relationship with macropore characteristics remain elusive in forest stony soils in northern mountainous area of China. The objectives of this study are to(1) use Industrial Computed Tomography(CT) scanning to quantitatively analyze rock fragment characteristics in intact soil columns in different forest lands and(2) identify the relationship between characteristics of rock fragments and that of the macropores. Intact soil columns that were 100 mm in diameter and 300 mm long were randomly taken from six local forest stony soils in Wuzuolou Forest Station in Miyun, Beijing. Industrial CT was used to scan all soil column samples, and then the scanned images were utilized to obtain the three-dimensional(3 D) images of rock fragments and macropore structures. Next, theparameters of the rock fragments and macropore structure were measured, including the volume, diameter, surface area, and number of rock fragments, as well as the volume, diameter, surface area, length, angle, tortuosity and number of macropores. The results showed that no significant difference was found in soil rock fragments content in the 10-30 cm layer between mixed forest and pure forest, but in the 0-10 cm soil layer, the rock fragments in mixed forest were significantly less than in pure forest. The number density of macropores has significant negative correlation with the number of rock fragments in the 0-10 cm soil layer, whereas this correlation is not significant in 10-20 cm and 20-30 cm soil layers. The volume density of macropore was not correlated with the volume density of rock fragments, and there is no correlation between the density of macropore surface area and the density of rock fragment surface area. Industrial CT scanning combined with image processing technology canprovide a better way to explore 3 D distribution of rock fragments in soil. The content of rock fragments in soil is mainly determined by parent rocks. The surface soil(0-10 cm) of forest contains fewer rock fragments and more macropores, which may be caused by bioturbation, root systems, gravitational settling and faunal undermining. 展开更多
关键词 Rock fragment MACROPORE Forest stone soil Mountain area Industrial Computed Tomography
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Effect of heterogeneity on occurrence of zonal disintegration around deep underground openings 被引量:1
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作者 Jia Peng Zhu Wancheng Zhang Shichao 《International Journal of Mining Science and Technology》 SCIE EI 2014年第6期859-864,共6页
By utilizing the two numerical codes RFPA3 D and FLAC3 D, the effect of heterogeneity on failure mode and failure mechanism of rock around deep underground excavations under tri-axial stress is analyzed. It is found t... By utilizing the two numerical codes RFPA3 D and FLAC3 D, the effect of heterogeneity on failure mode and failure mechanism of rock around deep underground excavations under tri-axial stress is analyzed. It is found that zonal disintegration is a large scale shear-slip failure developed in deep surrounding rock mass under tri-axial stress, which is accompanied by a large amount of tensile failure. The distance between fractures and the number of fractures have a close correlation with the rock mass heterogeneity. With an increase of the homogeneity index of the rock mass, the distances between fractures decrease and the number of fractures increases. For an intact hard rock mass with relative high homogeneity, only failure mode characterized as v-shaped notches can be formed due to the intersection of intensively developed shear bands. None of the zonal disintegration can be formed due to the fact that with increasing homogeneity, the failure mechanism of rock mass is gradually dominated by shear failure rather than tensile failure. 展开更多
关键词 Deep rock mass Heterogeneity Zonal disintegration Failure mode
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