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| Study on the influence factors on the stability of the direct roof of fully mechanized mining face |
| Zhang Shoubao， Liu Yangfei， Zhang Yongxin， Bai Pengpeng， Yang Zhaoxi, Wang Chen |
| School of Safety and Resources Engineering, China University of Mining and Technology, Beijing 100083, China |
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Abstract In order to ensure safe and efficient production of coal mine，the stability model of fully mechanized face was established by using FLAC3D numerical simulation software. The control variable method was used to obtain the direct roof subsidence values under the conditions of different hydraulic support resistance，different end-face distance and different direct roof thickness, furthermore the relationships between the stability of the direct roof and its influence factors were drawn out such as support resistance, end-face distance and direct roof thickness, providing a theoretical basis for the safe production of coal face.
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