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Geomechanics and Engineering Volume 13, Number 6, December 2017 , pages 997-1010 DOI: https://doi.org/10.12989/gae.2017.13.6.997 |
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Application of black box model for height prediction of the fractured zone in coal mining |
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Shichuan Zhang, Yangyang Li and Cuicui Xu
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| Abstract | ||
| The black box model is a relatively new option for nonlinear dynamic system identification. It can be used for prediction problems just based on analyzing the input and output data without considering the changes of the internal structure. In this paper, a black box model was presented to solve unconstrained overlying strata movement problems in coal mine production. Based on the black box theory, the overlying strata regional system was viewed as a \"black box\", and the black box model on overburden strata movement was established. Then, the rock mechanical properties and the mining thickness and mined-out section area were selected as the subject and object respectively, and the influences of coal mining on the overburden regional system were discussed. Finally, a corrected method for height prediction of the fractured zone was obtained. According to actual mine geological conditions, the measured geological data were introduced into the black box model of overlying strata movement for height calculation, and the fractured zone height was determined as 40.36 m, which was comparable to the actual height value (43.91 m) of the fractured zone detected by Double-block Leak Hunting in Drill. By comparing the calculation result and actual surface subsidence value, it can be concluded that the proposed model is adaptable for height prediction of the fractured zone. | ||
| Key Words | ||
| black box; overlying strata movement; fractured zone; regional system | ||
| Address | ||
| Shichuan Zhang, Yangyang Li and Cuicui Xu : College of Mining and Safety Engineering, Shandong University of Science and Technology, 579 Qianwanggang Road, Huangdao District, Qingdao, Shandong Province, 266590, China | ||