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Soft–strong supporting mechanism of gob-side entry retaining in deep coal seams threatened by rockburst 被引量:9
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作者 Ning Jianguo Wang Jun +2 位作者 Liu Xuesheng Qian Kun Sun Bi 《International Journal of Mining Science and Technology》 SCIE EI 2014年第6期805-810,共6页
When gob-side entry retaining is implemented in deep coal seams threatened by rockburst, the cementbased supporting body beside roadway will bear greater roof pressure and strong impact load. Then the supporting body ... When gob-side entry retaining is implemented in deep coal seams threatened by rockburst, the cementbased supporting body beside roadway will bear greater roof pressure and strong impact load. Then the supporting body may easily deform and fail because of its low strength in the early stage. This paper established the roadside support mechanical model of gob-side entry retaining. Based on this model,we proposed and used the soft–strong supporting body as roadside support in the gob-side entry retaining. In the early stage of roof movement, the soft–strong supporting body has a better compressibility, which can not only relieve roof pressure and strong impact load, but also reduce the supporting resistance and prevent the supporting body from being crushed. In the later stage, with the increase of the strength of the supporting body, it can better support the overlying roof. The numerical simulation results and industrial test show that the soft–strong supporting body as roadside support can be better applied into the gob-side entry retaining in deep coal seams threatened by rockburst. 展开更多
关键词 deep coal seam Rockburst Gob-side entry retaining Soft-strong supporting body
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Construction Technology of Deep Foundation Pit Support in Municipal Civil Engineering Foundation Construction
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作者 Jun Huang 《Journal of Architectural Research and Development》 2023年第5期20-26,共7页
Municipal civil engineering is the key content of municipal construction,and the construction scale is usually large.The quality of the project plays an important role in the development of urban economy.Due to the ra... Municipal civil engineering is the key content of municipal construction,and the construction scale is usually large.The quality of the project plays an important role in the development of urban economy.Due to the rapid increase of high-rise buildings,skyscrapers and underground buildings,the construction technology of deep foundation pit support has gradually become an indispensable construction technology.Therefore,the selection of foundation pit support construction technology is crucial in ensuring that whether the foundation is firm and stable,and whether the subsequent construction activities can be carried out smoothly.In view of this,the article discusses the application of deep foundation pit support construction technology in municipal civil engineering,aiming to provide reference for subsequent projects. 展开更多
关键词 deep foundation pit support Civil engineering Foundation construction Concrete pouring pile technology Row pile support technology
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A study of support strategies in deep soft rock:The horsehead crossing roadway in Daqiang Coal Mine 被引量:14
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作者 Guo Zhibiao Yang Xiaojie +2 位作者 Bai Yunpeng Zhou Feng Li Erqiang 《International Journal of Mining Science and Technology》 SCIE EI 2012年第5期665-667,共3页
Geomechanics in deep mines becomes more complex and structural support in soft rock can be very difficult.Highly stressed soft rock subject to expansion deformation is particularly difficult to control.The Tiefa Coal ... Geomechanics in deep mines becomes more complex and structural support in soft rock can be very difficult.Highly stressed soft rock subject to expansion deformation is particularly difficult to control.The Tiefa Coal Industry Group Daqiang Coal Mine is used as an example.A ventilation shaft,à550 horsehead,is located in tertiary soft rock.Analysis of the reasons for deformation shows an intumescent rock,which is easily damaged.Field observations and theoretical analysis led to a design capable of stabilizing the rock.A combination of spray,anchors,anchor bolts,and soft corner coupled truss supports allowed the deformation to be controlled.This provides a model for similar designs when support of a horsehead roadway is required. 展开更多
关键词 deep well Soft rock Horsehead Deformation mechanical mechanism Coupling support
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Deformation control of asymmetric floor heave in a deep rock roadway:A case study 被引量:12
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作者 Sun Xiaoming Wang Dong +2 位作者 Feng Jili Zhang Chun Chen Yanwei 《International Journal of Mining Science and Technology》 SCIE EI 2014年第6期799-804,共6页
In order to control asymmetric floor heave in deep rock roadways and deformation around the surrounding rock mass after excavation, in this paper we discuss the failure mechanism and coupling control countermeasures u... In order to control asymmetric floor heave in deep rock roadways and deformation around the surrounding rock mass after excavation, in this paper we discuss the failure mechanism and coupling control countermeasures using the finite difference method (FLAC^3D) combined with comparative analysis and typical engineering application at Xingcun coal mine, It is indicated by the analysis that the simple symmetric support systems used in the past led to destruction of the deep rock roadway from the key zone and resulted in the deformation of asymmetric floor heave in the roadway. Suitable rein- forced support countermeasures are proposed to reduce the deformation of the floor heave and the potential risk during mining. The application shows that the present support technology can he used to better environmental conditions. The countermeasures of asymmetric coupling support can not only effectively reduce the discrepancy deformation at the key area of the surrounding rock mass, hut also effectively control floor heave, which helps realize the integration of support and maintain the stability of the deep rock roadways at Xingcun coal mine. 展开更多
关键词 deep rock roadway Asymmetric floor heave Numerical simulation Asymmetric reinforced support
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Rock roadway complementary support technology in Fengfeng mining district 被引量:3
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作者 Zeng Xiantao Jiang Yaodong +4 位作者 Jiang Cong Ma Zhenqian Zhan Shaojian Zhang Kexue He Changhai 《International Journal of Mining Science and Technology》 SCIE EI 2014年第6期791-798,共8页
This paper takes No.52 return uphill roadway of Yangquhe coal mine as a research project. Based on the research, especially its geological condition, indoor experiments, numerical simulation and theoretical analysis w... This paper takes No.52 return uphill roadway of Yangquhe coal mine as a research project. Based on the research, especially its geological condition, indoor experiments, numerical simulation and theoretical analysis were employed to determine the difficult coefficients of Yangquhe project. By using these means,the difficult coefficients of the deep rock engineering were determined. From a study of the effects of crustal stress and the roof mechanism on roadway stability, the transformation mechanism in Yangquhe coal mine has been determined. As a result of this research, the interactive support technology of prestressed cable mesh was developed and the technology tested in mining engineering, which proved to be feasible. 展开更多
关键词 deep mining Return airway Destruction mechanism High strength Complementary support
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