The Suitability Research Of The Affect Of Pressure Coal Mining Of Highway Under The Condition Of Complex Geological Structure

When the highway corridor by the terrain and the limits, taking into account thecosts arising choose other routes increases and security issues, the inevitable pressureof overlying coal resources across the region as the only economically reasonablesolution. Coal is one of today’s major energy, which makes the highway morepressure overlying coal mining value and practical significance. The highway is partof a linear structure, generally there on the highway bridges, viaducts, tunnels andother buildings, vehicles running speed, high density, so the buildings on the highwayand is extremely sensitive for mining subsidence, the current domestic highwayoutside the adaptability of mining influence a systematic study yet.Chongqing Nan Wan Expressway is such a pressure overlying coal resources ofthe highway, nanchuan to Wansheng expressway opened to traffic, road sectionswithin about20km wide range of pressure overlying coal resources, resulting in somesections will be affected by the impact of mining while most of the sections locatedabove Ida, will be affected by mining directly affected. In order to fully understandthe main highway facilities (lines, bridges, tunnels, etc.) affected by mining extentthat the road to ensure safe passage of the premise, as many mined coal resources andcreate more economic benefits, this paper intends to adopt scientific projected theorypredict different mining subsidence of ground surface inclination, displacement anddeformation, and then come to the roadbed, bridge piers and each point of the layoutof the tunnel public point movement and deformation data, through the highways,bridges and tunnels critical movement and deformation comprehensive analysis anddemonstration, to complete the South Wan freeway sections of coal mining influenceadaptation assessments, and for the highway and on how to make buildings moreefficient to adapt the impact of mining, to take the necessary measures to adaptmining induced subsidence and deformation, for a similar design and construction ofhighways provide a useful reference. The main contents include:①Recalled the pressure of coal mining influence future research situation,summed up the country for a case of bridges and railways in mining movement anddeformation under the influence, proposed to carry out coal mining freewaysystematic study of the need for adaptability and general research ideas;②Chongqing Nan Wan Expressway is a typical example, carried out on sectionsaddress structural, stratigraphic, hydrological survey and location of coal distribution analysis of the relationship with the highway, the section discusses the structure of thecoal distribution and address complex;③Summarizes research at home and abroad is expected to surface subsidencetheory, proposed for the calculation of the theoretical research, the establishment oftwo coal seams dip the mathematical model, and analyze the expected residualdeformation effect on the settlement;④In close connection with China’s "three down" mining standards, according totheoretical calculations of the expected position of points obtained movement anddeformation data, mapping sinking contour graphs, determine the scope of mining;⑤Through systematic summary of future mining on highways, bridges andtunnels movement and deformation effects, obtained roadbed subsidence affecting thehorizontal level, the level of distortion, tilt and stability, subsidence and horizontaldeformation of bridges, tunnels tilt and deformation is critical deformationcharacteristics affecting mining conclusions. On the roadbed, bridges, tunnels andcritical deformation characteristics were analyzed for whether they can adaptregulatory requirements, draw conclusions mining influence adaptability, and futuremining area on the highway and building design proposals and concluded.