Engineering practice and theoretical progress of top-coal caving mining technology in China
WANG Jiachen
Abstract：This paper summarizes the engineering practice of longwall top-coal caving (LTCC) in China in the past 35 years,which can be divided into three stages:exploratory stage,promotes application stage,expands stage,mature and output stage.LTCC has become a representative technology and achievement of Chinese coal mining practice around the world.The theoretical research and progress of LTCC are summarized as the stage of reference,the stage of exploration and the stage of innovation.Innovative theoretical achievements in the field of top-coal drawing law are introduced and some directions of the theoretical research of LTCC in the stage of innovation are proposed.For example:the fracture mechanism of top-coal,the drawing law of the loose top-coal,the relationship between the support and the surrounding rock,the strata movement law,the supporting mechanism of full coal roadway,basic economics of LTCC,etc.In-depth theoretical research can further guide the improvement of LTCC technology and expand its application.
Keywords：longwall top-coal caving (LTCC)theoretical researchengineering practicecaving mechanisms of top-coalrepresentative technology
Publication Date：2018-01-01