China University of Mining and Technology

Pingdingshan Tianan Coal Mining Co., Ltd

China Pingmei Shenma Energy and Chemical Industry Group Co., Ltd

Xuzhou Zhongan Science & Technology Co., Ltd.

Jianguo Zhang

Jixiong Zhang

Qiang Zhang

Hao Yan

Weiqing Zhang

Qiang Sun

Wei Yin

Disclosed is a method for designing supporting parameters of a transition support for a mixed mining face of filling and fully-mechanized mining. The method includes: first, determining a total length of a mixed mining working face and a length of a filling section according to requirements of a coal mining production capacity of the mixed mining working face and a filling capacity of the filling section working face; then, establishing a mixed mining numerical model of filling and fully-mechanized mining by using three-dimensional distinct element software, and simulating and calculating a caving height of a roof of a transition section and a stress influence range of the transition section when a filling rate of a mined-out area of the filling section changes; based on a result of numerical simulation and calculation, performing curve fitting according to a correlation coefficient to obtain a functional relationship between the filling rate and the caving height and a functional relationship between the filling rate and the stress influence range of the transition section; and finally designing supporting parameters of a transition support in combination with actual engineering geological parameters. The method can provide a reference for supporting design of a support, and enables a smooth transition between a filling support and a fully-mechanized mining support for a mixed working face, thereby further enriching filling mining theories and expanding the application range of filling mining.

Method for designing supporting parameters of transition support for mixed mining face of filling and fully-mechanized mining

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Henan, China

Jianguo Zhang