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Analysis of stability of coal pillars with multi-coal seam strip miningZHANG Li-ya, DENG Ka-zhong, ZHU Chuan-guang, XING Zheng-quan(Jiangsu Key Laboratory of Resources and Environmental Information..., the researches on the laws of the geological mining factors to upper and lower pillar’s stability are still deficient in multi-coal seam strip mining at present. Based on the three dimension fast Lagrangian......
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CONTROLLED BLASTING RESEARCH FOR SHAPEN CUTTING OF STRUCTURAL DECORATION STONE刘清荣摘 要:<正> This paper analyses the fragmenting principleof static blasting agent (SBA) and the action ofits cutting fragmentation. Using SBA for stermingmaterial proved very useful and advantageous. Herewe analyse in detail the cutting action of pre-stress and stress......
J. Cent. South Univ. (2021) 28: 1724-1736 DOI: https://doi.org/10.1007/s11771-021-4729-3 Stress-strain-acoustic responses in failure process of coal rock with different height to diameter ratios...-Verlag GmbH Germany, part of Springer Nature 2021 Abstract: Residual coal pillars play an important role in mining the adjacent coal seam safely, managing the gobs and maintaining the stability......
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Research on Decalcification Degradation Process of Cement Stone余海燕,YANG Jiujun,RONG Hui摘 要:An accelerated laboratory method(saturated ammonium nitrate solution immersion method) was used to analyze the degradation of cement decalcification process. By studying the changes of intensity, volume, elastic modulus, quality, p H value, the Ca/Si, and mineral......
如图5所示.图中,实心表示开裂前石材应变,空心表示开裂后石材应变.可见,素石板,预制CFRP筋增强板加固试件和表层嵌埋CFRP筋加固试件的截面应变分布和发展规律基本相同,均满足平截面假定. 图5 石板跨中截面应变分布 Fig. 5 Representative stone strain distribution at midspan 石板开裂前,跨中石材应变沿板高基本呈线性分布,在相同荷载水平下...]. 工程抗震与加固改造, 2009, 31(6): 47-51. GUO Zixiong, HUANG Qunxian, CHAI Zhenling, et al. Study and prospect of disaster prevention technology of stone masonry structures[J]. Earthquake Resistant Engineering......
High temperature dephosphorization behavior of monazite concentrate with charred coal XING Peng-fei(邢鹏飞), ZHUANG Yan-xin(庄艳歆), TU Gan-feng(涂赣峰), GUO Jing(郭 菁) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China Received 17 December 2009; accepted 27 April 2010 Abstract: Dephosphorization behavior of monazite concentrate with charred coal at high temperature......
J. Cent. South Univ. (2016) 23: 2336-2345 DOI: 10.1007/s11771-016-3292-9 Effects of thermal treatment on physical and mechanical characteristics of coal rock YIN Tu-bing(尹土兵)1, WANG Pin(王品)1, LI Xi... University of Science and Technology, Xiangtan 411201, China Central South University Press and Springer-Verlag Berlin Heidelberg 2016 Abstract: To study the physical and mechanical properties of coal......
Damage statistical mechanics model of top coal in steep top caving coalPingwu Shi, Xingping Lai, and Zhaoning GaoSchool of Enengy, Xi’an University of Science & Technology, Xi’an 710054... mechanics model of horizontal section height in the top caving was constructed in the paper. The influence factors including supporting pressure, dip angle and characteristic of coal on horizontal......