标题：Study on the critical exponent of the rock burst risk with method of drilling bits in island working face
作者：Gu Shitan; Huang Ruifeng; Jiang Bangyou; Zhang Rui
作者机构：[Gu Shitan; Huang Ruifeng; Jiang Bangyou; Zhang Rui] Shandong Univ Sci & Technol, Coll Resources & Environm Engn, Qingdao 266590, Shandong, Peoples R 更多
会议名称：3rd International Workshop on Mine Hazards Prevention and Control
会议日期：NOV 19-21, 2013
来源：3RD INTERNATIONAL WORKSHOP ON MINE HAZARDS PREVENTION AND CONTROL
关键词：working face; method of drilling bits; critical exponent; rock burst
摘要：Rock burst is a typical coal or rock dynamic disasters phenomenon and one of the worst natural hazards in coal mining. Drilling cuttings method is an effective way of evaluating the danger degree of it by testing dynamic characteristics presented in the process of drilling, relevant dynamic effects and the weight of pulverized coal, etc. through drilling 42-50mm diameter hole in compressed coal seam. Based on the principle of drilling effect, in this paper, relationship between coal stress and weight of pulverized coal were analyzed, and applicable index of rock burst was determined. Through drilling test in the coal face gateway along the tendency of coal seam and extracting the pulverized coal, normal weight of pulverized coal per meter was attained by statistical analysis and revision was carried on of it. And then critical exponent of the method of drilling bits was calculated which could be used to directing routine monitoring of rock burst.