|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Instability mechanism and control technology of soft rock roadway affected by mining and high confined water显示文摘Based on deformation and failure characteristics of the second belt conveyor roadway at level II of Zhuxianzhuang coal mine, laboratory experiments, numerical calculation and field test were adopted to analyze the composition and microstructure of mudstone, the law of mudstone hydration and its strength weakening induced by water, the characteristics of surrounding rock deformation and failure under the action of confined water. Results showed that montmorillonite clay minerals accounted for as much as 76% of mudstone, with a large number of pores existing in the microstructure. Besides, as the molecular structure of montmorillonite changed, mudstone microstructure damage occurred with the macroscopic manifestation of its rheological instability. Weakening degree of confined water on residual strength of mudstone was almost 50%. The instability mechanism of soft rock roadway caused by high confined water is that surrounding rock circulates the process of ‘‘fracture-seepage-mud ding-closed'' twice, which weakens its strength and leads to roadway instability. A combined support technology, namely the, ‘‘high-toughness sealing layer + hollow grouting cables + full-length anchoring bolts with deep borehole'' was proposed. Based on field observation, the soft rock roadway was controlled effectively, which also verified the effectiveness of new control technology for surrounding rock. | Li Guichen Jiang Zuohan Lv Chuangxin Huang Chao Chen Gui Li Mingyuan | 2015 | International Journal of Mining Science and Technology2015，25，4： | 11 |
| 2 | Emodin-induced apoptosis in human breast cancer BCap-37 cells through the mitochondrial signaling pathway显示文摘 | Zhiwei Huang Guichen Chen Ping Shi | 2008 | Archives of Pharmacal Research2008，，6： | 1 |
| 3 | Emodin-induced apoptosis in human breast cancer BCap-37 ceils through mitochondrial signa- ling pathway显示文摘 | Huang Zhiwei Chen Guichen Shi Ping | 2008 | Arch Pharm Res2008，31，6： | 1 |
| 4 | Determination of long-chain fatty acids in bryophyte plants extracts by HPLC with fluorescence detection and identification with MS显示文摘 | Jinmao You Xianen Zhao Yourui Suo Yulin Li Honglun Wang Guichen Chen | 2007 | Journal of Chromatography B2007，848，： | 1 |
| 5 | Numerical modeling on strain energy evolution in rock system interaction with energy-absorbing prop and rock bolt显示文摘The interaction mechanism between coal and rock masses with supporting materials is significant in roadway control, especially in deep underground mining situations where dynamic hazards frequently happened due to high geo-stress and strong disturbed effects. This paper is to investigate the strain energy evolution in the interaction between coal and rock masses with self-designed energy-absorbing props and rock bolts by numerical modeling with the finite difference method. The interaction between rock and rock bolt/prop is accomplished by the cables element and the interface between the inner and outer props. Roadway excavation and coal extraction conditions in deep mining are numerically employed to investigate deformation, plastic zone ranges, strain energy input, accumulation, dissipation,and release. The effect on strain energy input, accumulation, dissipation, and release with rock deformation, and the plastic zone is addressed. A ratio of strain energy accumulation, dissipation, and release with energy input a, β, γ is to assess the dynamic hazards. The effects on roadway excavation and coal extraction steps of a, β, γ are discussed. The results show that:(1) In deep high geo-stress roadways, the energyabsorbing support system plays a dual role in resisting deformation and reducing the scope of plastic zones in surrounding rock, as well as absorbing energy release in the surrounding rock, especially in the coal extraction state to mitigate disturbed effects.(2) The strain energy input, accumulation is dependent on roadway deformation, the strain energy dissipation is relied on plastic zone area and disturbed effects, and strain energy release density is the difference among the three. The function of energyabsorbing rock bolts and props play a key role to mitigate strain energy release density and amount, especially in coal extraction condition, with a peak density value from 4×10^(4) to 1×10^(4)J/m^(3), and amount value from 3.57×10^(8) to 1.90×10^(6)J.(3) When mining is advanced in small steps, the strain energy accumulation is dominated. While in a large step, the released energy is dominant, thus a more dynamic hazards proneness. The energy-absorbing rock bolt and prop can reduce three times strain energy release amount, thus reducing the dynamic hazards. The results suggest that energy-absorbing props and rock bolts can effectively reduce the strain energy in the coal and rock masses, and prevent rock bursts and other hazards.The numerical model developed in this study can also be used to optimize the design of energyabsorbing props and rock bolts for specific mining conditions. | Yang Hao Chunhui Liu Yu Wu Hai Pu Yanlong Chen Lingling Shen Guichen Li | 2023 | International Journal of Mining Science and Technology2023，33，10： | 0 |
| 6 | Early Warning Role of Data from Automatic Stations in Forecast of Dense Fog显示文摘Based on observation data from automatic stations in Lianyungang,visibility and weather situation of dense fog leading to a traffic accident in Lianyungang on April 15,2012 were analyzed firstly,and then changes of meteorological factors related to fog appearance and disappearance,such as wind speed,temperature and relative humidity,were discussed. The results showed that wind speed was below 2 m/s when fog occurred,and wind velocity reduced obviously before visibility deceased,appearing a trough. Fog appeared when temperature was nearly the minimum,and there was no great change in wind speed,but visibility went up gradually after temperature rose. The longer the duration of the minimum temperature,the longer the duration of the minimum visibility. Moreover,visibility would become low after temperature rose. | Zhang Honghua Zhang Liwen Chen Weiwei Wang Guichen Yang Hongmei Liu Hui | 2014 | Meteorological and Environmental Research2014，5，7： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员