Study On Failure Mechanism And Stability Of Deformation Of A Coal Mine Industrial Site In Loess Slope

Loess slope deformation and failure is the supergene geological phenomena common human engineering activities in loess area, serious harm. Especially the construction of coal mine industrial site in loess area, loess slope caused by slope excavation, the mechanical vibration, the effect of rainfall and other deformation directly threatens the security of industrial sites. Here is a selection of typical loess slope coal industry as the research object, by means of the field survey, investigation, experiment, calculation method of simulation, theoretical analysis, evaluation and numerical, and obtained some valuable results, conclusions listed, including:①Prepare for the workshop-coal bin slope forming process, deformation characteristics of the deformation and failure mechanism, to "cut the foot--compression cracking--extrusion--dislocation--mine industrial site of loess slope stability"②When filling materials in the soil mass crack,:Cmalan=0-5kpa,(p malan=40～60°;CLishi=0～5kPa, lishi=40～60°;Cpaleosol=0～5kPa, paleosol=40～60°; When the soil moisture content10%:Cmalan=16～24kPa, malan=28～30°;CLishi=20～24kpa,lishi=34～36°; Cpaleosol=30～42kPa, paleosol=28～31°;When the soil infiltration:Cmalan=12～16kPa,phi malan=23～25°;CLishi=16～20kpa, lishi=28～30°;C=20-26kpa,φ paleosol=8～16°.③In view of the multilevel ladder loess slope stability evaluation excavation site in the construction of the proposed a new evaluation way:according to different properties of different part of the slope soil to determine the basic physical properties and shear strength of the slope; single-stage slope, multi-stage slope and overall slope stability evaluation of different slope, obtain the whole and local stability evaluation results; using a variety of stability evaluation method to calculate and study the overall slope comparison, the transfer coefficient method on loess slope stability evaluation more reasonable;④Study of slope rainfall seepage simulation, results and conclusions:the process of rainfall, slope in the first six big platform first appeared on pore water pressure, and with the increase of time, the porosity of the soil surface water with single-stage slope surface soilpenetration to multistage slope development gradually.the influence of water on the slopestability of main performance is: on the top of the slope, platform or at the foot of the slopeformed certain weak zone, reduce its shear strength, the subsequent instability.