2results about How to "Avoid construction" patented technology

The utility model relates to a cold shrinkage type climbing increasing umbrella, insulating porcelain bottle and disconnecting switch, wherein the cold shrinkage type climbing increasing umbrella comprises: a climbing increasing umbrella, which comprises an umbrella skirt main body; a supporting body, which comprises a silk tube formed by winding a single fine wire according to a preset thread shape; the silk tube is attached to the inner wall of the umbrella skirt main body; the end of the silk tube is reserved with a silk head; wherein, in the expanded state of the climbing increasing umbrella, the umbrella skirt main body is sleeved on the supporting body, and the climbing increasing umbrella is supported and opened by the supporting body; the silk head is pulled to separate the fine wire, the supporting body is disassembled, and the climbing increasing umbrella is contracted. The utility model effectively increases the creepage distance of the insulator porcelain bottle, can further improve the insulating level of the porcelain bottle, and has no open fire and high-temperature heat source in the whole installation process, completely avoids the fire risk, and makes the climbing increasing umbrella safe in construction in the explosion-proof places such as the transformer substation and the oil refinery.

This invention belongs to the field of mining engineering technology, specifically disclosing a method for subsequent backfilling of a goaf in a gently dipping thick ore body. The backfilling method involves dividing the ore body vertically into multiple intermediate sections, each intermediate section into multiple segments along the strike, each segment into multiple ore block units along the dip, and each ore block unit into multiple stopes. Segmental vein roadways are arranged along the strike of the floor, and ore extraction ramps are arranged along the dip from these segmental vein roadways. Roof-cutting vein roadways are arranged along the strike of the roof, and roof-cutting ramps are arranged along the dip from these roof-cutting vein roadways. An ore extraction access road is constructed along the strike from the ore extraction ramps, and a drilling roadway is constructed along the strike from the roof-cutting ramps. Downward drilling is used in the drilling roadways to create blast holes and blast the ore, which is then extracted through the ore extraction access road. After mining is completed, a goaf is formed. Backfilling pipelines are laid through the roof-cutting vein roadways, roof-cutting ramps, and drilling roadways to the goaf before backfilling. This invention features reduced mineralization, high efficiency in mining, low cost, and high safety in stope mining.