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36results about How to "Relieve excessive stress" patented technology

Composite supporting system for coal mine rectangular gate roadway during pressure bump based on strong-releasing and strong-supporting theory

The invention discloses a composite supporting system for a coal mine rectangular gate roadway during pressure bump based on the strong-releasing and strong-supporting theory. The composite supportingsystem comprises a roof supporting system used for supporting a gate roadway roof, a side supporting system used for supporting the two sides of the gate roadway and a pressure-releasing groove formed in a floor of the gate roadway. The roof supporting system comprises a plurality of roof short anchor cables and energy absorption pieces; every two adjacent roof short anchor cables extending in the length direction of the gate roadway are connected through roof U-shaped channel steel, and roof pressure-releasing holes are formed in the roof; the side supporting system comprises a plurality ofside short anchor cables and energy absorption pieces; and every two adjacent side short anchor cables arranged in the height direction of the sides are connected through side U-shaped channel steel,and side pressure-releasing holes are formed in the two sides of the gate roadway correspondingly. The composite supporting system adopts the principles of strong-releasing and strong-supporting as well as shock absorption and energy absorption, overall deformation of the roadway can be effectively restrained, harm to personnel and equipment can be reduced when pressure bump occurs, and meanwhilefloor heave of the roadway is effectively restrained.
Owner:XIAN UNIV OF SCI & TECH

Foundation pile for building

The invention discloses a foundation pile for a building. The foundation pile comprises a pile driving frame, wherein the top of the pile driving frame is fixedly connected with a rammer; the upper surface of the pile driving frame is in sleeve connection with a pile body; the bottom of the pile body is movably connected with a pile head device; the pile head device comprises a pulling block and a chuck device; the outer surface of the bottom of the pile body is in sleeve connection with a pile head shell; the outer surface of the pile body is fixedly connected with the chuck device and the pulling block respectively; the pulling block is arranged in an inner cavity of the pile head shell and is adaptive to the inner cavity; a side pressing device is in sleeve connection with an opening of an inner wall of the pile head shell; the bottom end of the pile head shell is fixedly connected with a protection block; and a pressing block is arranged at the bottom of the inner cavity of the pile head shell. The invention relates to the technical field of buildings. According to the foundation pile for the building, the pile body is hit through the rammer so that the foundation pile for the building is pressed to move downward to enter soil; the pile head device is arranged at the bottom of the pile body so that the effect of protecting the bottom of the pile body in an underground high-pressure environment is realized.
Owner:李良容
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