ABSTRACT
The winch chamber in No. 1 Mining Area of Yangzhuang Mine was founded in 2006 bearing the
1 Mining feeding task and discharging gangue. Since October 2010, field workers have found that there were some cracks in the winch chamber accompanied by slagging off, this phenomenon was particularly fiercer in March 2012. The layer of winch chamber roof fell off seriously, causing tuck net phenomenon obviously with reinforced metal mesh tearing and steel strip breaking. As shown in Figure 1, the floor heave of winch chamber became serious, leading to a serious distortion, and making the winch can’t use normally. In order to ensure safety production and avoid the passive situation of the heavy casualties and the stagnation of production, we must study the failure mechanism of winch chamber and adopt comprehensive and effective measures to control it. The failure mechanism was complex. Many researchers at home and abroad have made a lot of researches and have gained great achievements on listening comprehension studies. Manchao He and Xiaoming Sun etc (He et al. 2002, He et al. 2004, Jiang et al. 2005, Jia 2006) put forward a standpoint that weak surrounding rock layers has a great influence on the stability of surrounding rock by analyzing the structure of surrounding rock. Lijun Han (Wang et al. 2005, Li et al. 2012) studied the influence on the stability of surrounding rock and concluded that high content of clay mineral composition was easy to cause damage of surrounding rock. Hongpu Kang (He et al. 2004, Kang 2005
& 1993, Jiang et al. 1994) put forward a point of view that scientific and rational support system can effectively control the surrounding rock deformation and failure by discussing the relationship between the parameters and the stability of surrounding rock. By using the numerical analysis software to simulate the influence of external disturbances on the stability of surrounding rock, Chunan Tang (Zhu et al. 2005, Tang et al. 2003, Xu et al. 2002, Zuo et al. 2006) analyzed the failure mechanism of roadways. In view of the damage conditions of surrounding rock of winch chamber, this paper proposed to study the deformation and failure mechanism of surrounding rock by lab and numerical analysis methods, in order to provide scientific basis of the strengthening of the winch chamber.
