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《Coal Science and Technology》 2014-12
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Research on Actual Measurement of Surface Subsidence Law for Fully-Mechanized Top Coal Caving in Extra Thick Seam

GAO Chao;XU Nai-zhong;LIU Gui;NI Xiang-zhong;Coal Mining & Designing Department,Tiandi Science & Technology Co. ,Ltd.;Shanxi Zhongmei Dongpo Coal Co.,ltd.;  
In order to study law of surface subsidence under situation of shallow buried depth,medium thick bedrock and extra thick seam using fully- mechanized top coal caving method,an observation station was established on surface above No. 914 Working Face of Dongpo Coal Mine. By analyzing the measured data,a set of complete prediction parameters for surface subsidenceand angular parameters were obtained. Under this geology and mining condition,the authors studied its mobile angle parameters and the dynamic deformation characteristics. The results showed that the subsidence factor was 0. 74,the displacement factor was 0. 25,the major influence tangent angle was2. 95,and the main influence spread angle was 86. 5°. It is concluded that under this situation,the initial period is short; the active period of surface subsidence velocity is large and moves violently,and subsidence in the active period occupies a high ratio of the total movement period. Under situation of shallow buried depth and medium thick bedrock,law of surface subsidence for extra thick seam using fully mechanized top coal caving method has its particularity.
【Fund】: 国家重大科技专项基金资助项目(2011ZX05064);; 中国煤炭科工集团科技创新基金青年基金资助项目(2013QN001)
【CateGory Index】: TD327
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1 CHEN Jun-jie;WANG Li;GUO Yan-tao;Henan Polytechnic University;Xuchang Xinlong Mining Ltd.of Henan Province;;Obtaining parameters of probability integration method in observation of mine surface moving[J];Science of Surveying and Mapping;2014-03
2 WANG Xinfeng;GAO Mingzhong;Key Laboratory of Coal Mine Safety and High-efficiency Mining Cosponsored by Anhui Province and Ministry of Education,Anhui University of Science and Technology;Energy Sources and Safety School,Anhui University of Science and Technology;;Underground pressure behavior at fully mechanized mining face in thinner middle thick coal seam[J];Journal of Liaoning Technical University(Natural Science);2014-06
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