公路下伏采空区稳定机理及注浆加固方法研究

Abstact工程硕士学位论文AbstractThepaperin order to the south Alfred chuang ofthe mine-out area in gongyi(focal copperhigh-speed to XiaoZiDian)reconstruction project as the research background,the influence ofby reconstructing highway roads along the mining area of the analysis of regional geologyand engineering geology,slow the movement regularity of surrounding rock of deeplyinclined coal seam,using the empirical formula calculation method and the numericalsimulation of GTS method of surface movement and deformation rule of surrounding rockand the contrast research,on the basis of the above goaf on the influence of highwayengineering and related results after grouting roadbed stability problem,research mainly drawthe following conclusion:the south Alfred chuang slowly inclined coal seam up the hill anddown the mountain direction is asymmetrical distribution,scope of overlying rock destructionuphill direction is greater than the downhill direction,pointing in the direction the mountainhorizontal displacement increases,pointing in the direction down the hill in the horizontaldirection,maximum tensile deformation in down direction,maximum compressivedeformation in the direction of the mountain.Maximum ground subsidence value is about1.408 m,horizontal displacement value of about 0.422 m,tilt value I in 20.0~23.3 mm/m,horizontal deformation value epsilon in 9.1 ~10.6 mm/m,curvature value K in 0.4~0.4mm/m.It is concluded that the surface according to the results of the numerical simulation ofcloud pictures maximum subsidence value the most is about 1.43 m,horizontal displacementvalue of about 0.78 m,the calculation results of two methods is far greater than the specifiedvalue,thus,south Alfred chuang coal mine belongs to the region.According to the result ofstress nephogram can draw after coal extraction,goaf end and end coal pillar appear obviousstress concentration phenomenon,empty area damage mainly shear failure;After the surfaceof the road,in the long run additional loads,near the gob area under load will produceinstability of coal pillar,generate additional subsidence,accelerate the residual deformation.Of goaf governance principles and related standards is analyzed,and the advantages anddisadvantages of mined-out area of general management method and makes a comprehensivecomparison to adapt to the characteristics and eventually determine grouting method for thefinal treatment plan,and use the GTS numerical simulation was carried out on thecharacteristics of stress and strain of surrounding rock after grouting contrast research,cloudresults show that the surface deformation compared to produce very big change before andafter grouting,grouting quantity of settlement of ground surface displacement decrease