ABSTRACT
KEYWORDS: Mining induced stress shell, fully mechanized top-coal caving, ground control, advancing velocity, pillar width
1. INTRODUCTION
Because of the high output and high efficiency compared with the slicing mining method, the fully mechanized top-coal caving (FMTC) and large mining-height (LMH) method are, at present, popular for thick coal seams in China. With regard to top-coal caving technology, abundant and fruitful researches have been done in the domain of rock pressure control in recent years (Jin 2001, Lu et al. 2002, Qian et al. 2003, Xie et al. 2006, Xie 2007, Yang 2007, Peng 2008, Yuan 2008). The Huainan and Huaibei coal mine is one of Chinese energy bases and plays an important role in economy development of Anhui province. With mining technology development, especially FMTC and LMH are applied and popular in mining thick coal seam, and that not only results in safety and high efficiency mining, but also needs foundational theory research to solve mining induced problems, such as strata behavior, support invalidation, rock burst, methane explosion and so on.
