Study The Control Action Of Different Mining Methods On Slope Research

Coal mining caused a wide range of mining subsidence,the existence of mined-out area leads to the instability and failure of overlying rock mass structure,and gradually affect the stability of the slope surface.Under the condition of rainfall or earthquake can easily lead to the occurrence of landslides,the occurrence of landslide to threaten the safety of life and property of the people around.Landslides caused by coal mining is not a simple goaf collapse or landslide problems,past just focus on the study of surface movement and ground subsidence,and correlation of slope and goaf collapse,coordination involving relatively small.Accurately,therefore,study the formation mechanism of mining landslide disaster and mining mode for the control function is to reduce the mine slope landslide disaster,rational utilization of mineral resources,the key to improve the mine environment,its research is of great economic value and social significance.In this paper,first of all,the main types of mining landslide and paper summarizes common failure mode,and the types of mining landslide are analyzed.Before and after the second from drilling,topography and geological conditions,the mechanics characteristics of slope rainfall factors and underground mining such as a direct relationship with the slope sliding Angle analysis the formation mechanism of mining landslide,the results show that the forming process of mining landslide is divided into five stages: coal mining stage-central subsidence stage,trailing edge cracking stage,leading edge shearing stage,stage of landslide.On the basis of above analysis,according to the actual situation of mining landslide in the study area to establish relevant numerical model of the mining conditions of coal seam displacement,stress and strain of the slope body and so on were analyzed.The results show that the gob roof overburden after the formation of the overall sinking,and rock mass above the border effect tensile load,make its produce cracking damage.Roof subsidence after gradually affect the stability of the slope surface,causing the trailing edge of slope body and produce tensile cracks,central slope are produced by bending deformation and accelerate the peristalsis of the slope,the slope toe is driven by the upper slope resulting shear deformation.In the study area mining landslide as a typical example,simulation mining landslide under different mining way of the change of the displacement,stress and strain,discusses the control action of different mining methods on landslide deformation.Compared results show that the consequent all adopt reverse all adopt more conducive to the formation of the landslide,while both ends approximation type clean mining than central dispersive all adopt more effective control of slope deformation;Strip mining coal pillar can used to prevent sinking of slope above the effectively reduce the stress of the roof strata,but this way of coal recovery rate is relatively low,easy to cause waste of coal resources;Filling mining(that is,adopt the method of charging is the ability to maximise recovery rate and the stability of the slope above the coal mining method,filling body into making roof of coal seam curvature interference significantly reduced,greatly reduce the sedimentation of the upper rock mass,and effective control of slope stress distribution.