Mining Science and Technology (China)最新文献

Sliding mode control of chaos in the noise-perturbed permanent magnet synchronous motor with non-smooth air-gap 非光滑气隙噪声摄动永磁同步电机混沌的滑模控制

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.05.035

Ma Caoyuan , Wang Longshun , Yin Zhe , Liu Jianfeng , Chen Diyi

引用次数: 18

Simulating a fuzzy level controller for flotation columns 浮选柱模糊液位控制器的仿真

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.05.038

Liao Yinfei, Liu Jiongtian, Wang Yongtian, Cao Yijun

引用次数: 12

Land subsidence monitoring by D-InSAR technique D-InSAR技术监测地面沉降

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.05.030

Fan Hongdong, Deng Kazhong, Ju Chengyu, Zhu Chuanguang, Xue Jiqun

引用次数: 42

Design of comprehensive test system for detecting overlying strata mining-induced fractures on surface with radon gas 氡瓦斯采动地表裂隙综合检测系统设计

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.05.037

Zhang Wei , Zhang Dongsheng , Fan Gangwei

{"title":"Design of comprehensive test system for detecting overlying strata mining-induced fractures on surface with radon gas","authors":"Zhang Wei , Zhang Dongsheng , Fan Gangwei","doi":"10.1016/j.mstc.2011.05.037","DOIUrl":"10.1016/j.mstc.2011.05.037","url":null,"abstract":"<div><p>Based on radon gas properties and its existing projects applications, we firstly attempted to apply geophysical and chemical properties of radon gas in the field of mining engineering, and imported radioactive measurement method to detect the development process of the overlying strata mining-induced fractures and their contained water quality in underground coal mining, which not only innovates a more simple-fast-reliable detection method, but also further expands the applications of radon gas detection technology in mining field. A 3D simulation design of comprehensive testing system for detecting strata mining-induced fractures on surface with radon gas (CTSR) was carried out by using a large-scale 3D solid model design software Pro/Engineer (Pro/E), which overcame three main disadvantages of “static design thought, 2D planar design and heavy workload for remodification design” on exiting design for mining engineering test systems. Meanwhile, based on the simulation design results of Pro/E software, the stability of the jack-screw pressure bar for the key component in CTSR was checked with a material mechanics theory, which provided a reliable basis for materials selection during the latter machining process.</p></div>","PeriodicalId":100930,"journal":{"name":"Mining Science and Technology (China)","volume":"21 6","pages":"Pages 823-827"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mstc.2011.05.037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91499334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Seepage laws of two kinds of disastrous gas in complete stress–strain process of coal 煤全应力-应变过程中两种灾害性气体的渗流规律

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.06.023

Cao Shugang, Guo Ping, Zhang Zunguo, Li Yi, Wang Yong

{"title":"Seepage laws of two kinds of disastrous gas in complete stress–strain process of coal","authors":"Cao Shugang, Guo Ping, Zhang Zunguo, Li Yi, Wang Yong","doi":"10.1016/j.mstc.2011.06.023","DOIUrl":"10.1016/j.mstc.2011.06.023","url":null,"abstract":"<div><p>The similarities and differences in seepage flow evolution laws of CH<sub>4</sub> and CO<sub>2</sub> during complete stress–strain process of samples were comparatively analyzed. The results show that the seepage flow evolution laws of CH<sub>4</sub> and CO<sub>2</sub> are extremely similar during the stress–strain process, showing that the characteristic first decreased and then increased. A mathematical model was also established according to the relationship of seepage velocity and axial strain. However, due to the strong adsorption ability of CO<sub>2</sub>, the coal samples generated a more serious “Klinkenberg effect” under the condition of CO<sub>2</sub>. Owing to this, the CO<sub>2</sub> seepage flow resulted into occurrence of “stagnation” phenomenon during the late linear elastic stage II. In the strain consolidation stage III, the increment rate of CH<sub>4</sub> seepage velocity was significantly greater than that of CO<sub>2</sub>. In the stress descent stage IV, when the axial load reached the peak pressure of coal, the increment rates of CH<sub>4</sub> seepage velocity presented a turning point. But the changing rate of CO<sub>2</sub> seepage velocity still remained slow and a turning point was presented at one time after the peak of the strain pressure, which showed an obvious feature of hysteresis.</p></div>","PeriodicalId":100930,"journal":{"name":"Mining Science and Technology (China)","volume":"21 6","pages":"Pages 851-856"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mstc.2011.06.023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81463369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Study on the chaotic behavior of mining rock seepage system 矿山岩体渗流系统混沌行为研究

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.12.001

Wan Shiwen , Xu Jinhai , Li Chong

{"title":"Study on the chaotic behavior of mining rock seepage system","authors":"Wan Shiwen , Xu Jinhai , Li Chong","doi":"10.1016/j.mstc.2011.12.001","DOIUrl":"10.1016/j.mstc.2011.12.001","url":null,"abstract":"<div><p>One dimensional non-steady, non-Darcy flow of water in a rock stratum was reduced into a system described by six ordinary differential equations involving five controlling parameters. Through response computations and time series analysis, chaotic behavior in the reduced system was discussed in details. Firstly, the dynamical response of the reduced system under a set of parameters was calculated, and the power spectrum of the attractor was obtained through fast Lagrangian transformation; then the phase space was reconstructed by fixing embedding dimension to be 6 and delay time to range from 1 to 20, and the correlation dimension of the attractor was calculated based on the curves under the coordinates of logarithm of correlation integral vs. logarithm of covering radius; and lastly, the Lyapunov indices of the attractor were calculated by using Gram-Schmit’s orthogonalization method. The results show that the power spectrum of the attractor is continuous; the correlation dimension of the attractor is equal to 2.36; among the Lyapunov indices, LE1, LE2, LE3 are positive, LE5, LE6 are negative, and LE4 fluctuates near zero. All the analysis indicates that there may exist chaos in the system of non-steady, non-Darcy flow.</p></div>","PeriodicalId":100930,"journal":{"name":"Mining Science and Technology (China)","volume":"21 6","pages":"Pages 755-759"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mstc.2011.12.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90649005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Coal washing improvement by determination of optimal mixture of feed blends 通过确定最佳混合料来改善洗煤

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.06.024

Bahri Zahra , Shafaei Seyyed Ziaoddin , Kor Mohammad , Sereshki Farhang

引用次数: 4

Reliability of gas holdup measurements using the differential pressure method in a cyclone-static micro-bubble flotation column 旋流-静态微泡浮选柱压差法测定气含率的可靠性

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.06.026

Xia Wencheng, Yang Jianguo, Wang Yuling

引用次数: 5

Influence of microwave treatment under a hydrogen or methane atmosphere on the flotability of the macerals in Shenfu coals 氢气或甲烷气氛下微波处理对神府煤中矿物可浮性的影响

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.06.029

Zhao Wei, Yang Fusheng, Li Yuangang, Qu Jianlin, Zhou Anning

引用次数: 7

Evaluation of mine scale longwall top coal caving parameters using continuum analysis 用连续统分析法评价矿山规模长壁顶煤放煤参数

Mining Science and Technology (China) Pub Date : 2011-11-01 DOI: 10.1016/j.mstc.2011.06.027

Manoj Khanal, Deepak Adhikary, Rao Balusu

引用次数: 38