2results about How to "Improve construction conditions" patented technology

The application provides an open pit end slope coal spontaneous combustion advanced treatment method, and belongs to the technical field of coal safe mining, and comprises the following steps: determining a coal spontaneous combustion advanced treatment width B1 according to the stability coefficient of a slope in an initial state and a preset first step length; determining a coal spontaneous combustion treatment width B2 according to the stability coefficient of the slope in the initial state and a preset second step length; when the coal spontaneous combustion advanced treatment width B1 is greater than the coal spontaneous combustion treatment width B2, then the above steps are repeated, the coal spontaneous combustion treatment width B2 is gradually increased according to the preset second step length, and when the coal spontaneous combustion advanced treatment width B1 is less than or equal to the coal spontaneous combustion treatment width B2, the final coal spontaneous combustion treatment width is determined as the current coal spontaneous combustion treatment width B2. The application can effectively use the discarded materials to replace and fill the end slope coal seam with high spontaneous combustion tendency in advance, mine a large amount of end slope coal resources, save a large amount of discarded space, and facilitate construction conditions.

The application discloses a main bridge steel structure construction method and relates to the technical field of bridge construction. The specific steps comprise the following steps: dividing regions, installing baffle plates and pier columns, installing steel pipe piles and platform support columns, installing inter-column supports and sliding beams to form sliding tracks, repeatedly constructing the south bank, completing platform support covering a river, installing lower chord rods and lower bridge decks, installing upper chord rods and upper bridge decks, installing upper-layer cantilevers and lower-layer cantilevers, assembling sliding units, repeatedly assembling sliding units until closure, hoisting the last sliding unit and completing installation of the main bridge steel structure. The construction method can reduce operation risks, shorten construction period, save materials and reduce costs.