Overburden Failure Law of Fully Mechanized Repeated Mining

doi:10.3969/j.issn.0253-2336.2001.01.009

Abstract：Completed coal mining problems under three circumstances means that a coal mining face has many coal mining problems or many tasks under water bodies, building structures, and railway line. Due to a coal mining system under the three circumstances is a series of dynamic effects of overburden, ground surface, building structure and material element caused by artificial mining. Therefore the mining system is the other organized artificial system. The author shown a engineering project case. There is a water bearing stratum 25 m above the roof of the seam. The thickness of the seam is 2.5 m. On the ground surface, there are building structures needed to be protected. The paper structured a systematic physical model base on other organization theory. Then with systematic simulink software, a systematic mathematics model was built. With operation of the systematic mathematics model, a optimum limited mining depth (of 1.64 m) and optimum coal mining face terminated line (133 m to building structures) of the face to prevent the water inrush and building failure were obtained. The results shown that the method is simple and rational. The processing is direct and the calculation is samll.