Research On The Development Law And Initiation Mechanism Of Mine Slag Debris

Mine slag debris refer to the slag debris caused by the unreasonable heap of waste slag debris during mining activities,which is a typical of man-made debris flow.Compared with natural mudslides,the development of slag debris flow and the initiation mechanism has its own unique characteristics.This paper takes Xiao Qin Ling jin mining area as the research object to summarize the development law of mine slag debris through the investigation of the source of it.The distribution rule of mine slag debris is closely related to human activities.Compared with the nature water rock,the size of particles of slag heap is large and the span of its distribution is large too.Generally speaking,When the content of coarse grained soil particle size which is bigger than 5 mm is more than 70%,coarse grained soil will form the skeleton structure and its permeability will have obvious rise,and the particle size of the slag heap is bigger than 5 mm.This paper analyzes skeleton structure and its stability of souce of the slag heap by the gain flow's procedure of PFC,finding that the large size particles has formed obvious skeleton,that although the slag heap downhill feet is close to the natural angle of repose in the natural state,the interior of the slag heap does not force uneven phenomenon of stress concentration.It's obvious that the slag heap with good permeability is more stable under natural state.The initiation of mine slag debris is the key point in the mine debris flow.This paper researches the effects of rainfall and its initiation mechanism about the start under different condition of rainfall intensity.On the one hand,the slag heap is difficult to start under relatively small rain even if it rains for a long time,on the other hand,the rainfall effects the initiation of slag heap distinctly under the intense rainfall like rainstorm.