Reserach On Ground Collapse Geological Disaster Control Technology Caused By Abandoned Lnclined Shaft

This article have obtained the natural geographical situation,the nature of the mining area,by obtaining the basic mechanical parameters of the original soil mechanics laboratory experiment,combined with mine natural geographic profiles,governance mining properties and project management present situation and geological disasters,by theoretical analysis and numerical simulation calculation of the combined means,on abandoned slope induced ground collapse geological disaster control technology research and analysis,draw the following conclusions:(1)For a waste inclined shaft,in no supporting condition,the measured data and simulation data of settlement regularity is roughly in the same,a simple concrete branch supporting structure cannot meet the design requirements and specifications,the surface settlement data induced by abandoned inclined shaft with lining concrete is secondary developed by FLAC3D.With the distance from the abandoned inclined shaft,the surface settlement distance is nonlinear:In the short distance from the abandoned inclined shaft,surface settlement is relatively lage(fast),In the long distance,surface settlement is relatively slow.By the numerical simulation of filling into the abandoned inclined shaft 4 groups plan have been adopted,four filling effects,which are exerted to the distance of 15mn?30m?40m and 50m,are comparatively analysed.The result is that the economical and reasonable filling distance is 30m.(2)Filling material selection should be based on the specific situation of the mine,the rubble as filling material,although the size is not ideal,but in the mixed tailings and cement,has a good fluidity,and the rubble and tailings and other industrial wastes with cement ability,can well replace part of cement also,to achieve the purpose of reducing the cost,is the ideal material for mine filling;at the same time than paste material under the condition of the slump and compressive strength was measured with different,select the best mix for the concentration of 82%,namely:tail sand rubble:cement =1:1:0.25,this mix of compressive strength and slump is the best in the flow state,meet the construction requirements of pipeline transportation.(3)According to the design basis and desrgn principle of the control scheme,the control engineering design is obtained.From 1 to 5 abandoned mine are filled with different governance measures.to collapse body above the ground fissure do backfill,rock clean up the surface collapse.To formulate scientific and reasonable design of controlling scheme,chapter four branch branch of the former guard and filling support simulation effect and the actual testing data carries on the contrast analysis,found that simulation values of ground surface settlement curve trend is consistent with the measured values and surface accumulated settlement with from abandoned inclined well head distance increases to increase after the law of diminishing,in filling 30m near surface accumulated settlement reached the maximum value,the difference between the two is 0.222mm,comply with the design requirements and specifications,illustrates the design of control scheme with reality and can be used to treat waste slope problem.