Numerical Simulation Research on the Shape of Top Coal Drawn-Body in Gently Inclined Seam

Abstract:

The numerical model of top coal drawing in gently inclined seam is built based on PFC2d software. By comparing with the theory of drawn-body movement law, it can be obtained that the shape of top coal drawn-body accords with the theory of random medium movement. The research results show that the form of the shape equation of top coal drawn-body is uniform while the top coal caving angle is different. On the other hand, with the difference of top coal caving angle and drawing height, the shape of top coal drawn-body is differential at the meso scale, which depends on the parameters of the shape equation of top coal drawn-body.

• Periodical: Advanced Materials Research (Volumes 468-471)
• Pages: 2248-2254
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.468-471.2248
• Online since: February 2012
• Authors: Qiang Li, Wan Kui Bu, Hui Xu, Xiao Bo Song
• Keywords: Gently Inclined Seam, Numerical Simulation, Shape of Drawn-Body, Top Coal Drawing

References

[1] Haiyong Yu, Enli Jia and Rongchang Mu: the Basic Theory of the Caving Mining (China Coal Industry Publications, Beijing 1995). (In Chinese)

[2] Jian Wu: Energy of China Vol. 2 (1990), pp.25-29 (In Chinese)

[3] Binggang Ren, Qingju Ma and Yanqing Zang: China Comprehensive Mechanization Caving Mining (China Coal Industry Publications, Beijing 2002). (In Chinese)

[4] Zhongming Jin: Caving Mining Theory and Technology (China Coal Industry Publications, Beijing 2001). (In Chinese)

[5] Zhengfu Yang and Enbo Luo: Caving Mining Technology and Caving Mining Hydraulic Support (China Coal Industry Publications, Beijing 1995). (In Chinese)

[6] Yaoshe Xie, Xiaobo Song and Yanfeng Hu: Coal Science and Technology Vol. 36 (2008), pp.19-22 (In Chinese)

[7] Yunce Fan: Comprehensive Mechanized Caving Mining Technology (China Coal Industry Publications, Beijing 2003). (In Chinese)

[8] Litwiniszyn Jerzy: Arch. Mech. Stos. Vol. 8 (1956), pp.393-411.

[9] Yongjia Wang: the New Direction of the Theoretical Research of the Mine——the Random Medium Theory (Northeastern Industry Academy, Northeastern Industry 1962). (In Chinese)

[10] Fengyu Ren: Random Medium Theory and It's Application in the Mine (Metallurgical Industry Publications, Beijing 1994). (In Chinese)

[11] Dengpan Qiao, Wenzen Li and Da Zhang: China Mining Magazine Vol. 13 (2004), pp.56-60 (In Chinese)

[12] Xianrui Meng and Jianmin Li: Modern Caving Mining Theory and Practical Technology (China University of Mining and Technology Publications, Xuzhou 2001). (In Chinese)

[13] Yongqi Xu: Mining Engineering (China University of Mining and Technology Publications, Xuzhou 2003). (In Chinese)