文档介绍：Trans. Nonferrous Met. Soc. China 24(2014) 12551261Spatial structure evolution of overlying strata andinducing mechanism of rockburst in coal mineLin-ming DOU1, Xue-qiu HE2, Hu HE3, Jiang HE1, Jun FAN1 1. State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology, Xuzhou 221116, China;2. China Academy of Safety Science and Technology, Beijing 100012, China;3. School of Resource and Earth Science, China University of Mining and Technology, Xuzhou 221116, ChinaReceived 10 July 2013; accepted 29 December 2013Abstract: Spatial structure of overlying strata existed and evolved dynamically with the exploitation scope (boundary conditions)changes in coal mines and to induce rockburst. Based on the “key strata” theory, the integrated spatial structure of overlying stratawas put forward, which posed of “OX” structure in the plane section and “F” structure in the vertical section. Theformation and ongoing instability of the “OX” and “F” structures were called as dynamic evolution cycle of the overlying basic categories of “OX”, “F” and “T” structures were defined, and the strata behaviors of each spatial structure wereanalyzed. According to energy theory, mechanism of rockburst induced by spatial structure instability was discussed. The researchexpanded the scope of traditional ground pressure theory and provided a guide for the preventi