44 results about "Plate fracture" patented technology

The invention provides an inverted-arch interlocked girder and a construction method thereof. The inverted-arch interlocked girder comprises a plurality of interlocked girder bodies and a plurality of inverted arch bodies. The plurality of the interlocked girder bodies are arranged in parallel, the plurality of the interlocked girder bodies and the plurality of the inverted arch bodies are in perpendicular lap connection and fixed through anchor rods and nuts, and the inverted arch bodies are disposed above the interlocked girder bodies. According to the inverted-arch interlocked girder and the construction method thereof, the interlocked girder bodies and the inverted arch bodies are in perpendicular lap connection and fastened through the anchor rods and the nuts, so that the support stability is guaranteed, the effective contact area between the inverted arch bodies and a base plate can be increased, the line contact is changed into net contact, the stress uniformity is increased, and base plate fractured rock is effectively prevented from projecting among support rows.

The invention provides a two-dimensional rational extrusion oil gas transporting poly-graphic physical simulation device. The two-dimensional rational extrusion oil gas transporting poly-graphic physical simulation device comprises a model main body for filling a two-dimensional material model, a cover plate and a pressing plate provided with a piston, wherein the cover plate is made of transparent glass and is provided with a supporting surface for supporting the two-dimensional material model; and the two-dimensional material model is positioned between the cover plate and the pressing plate provided with the piston, and the pressing plate provided with the piston is used for extruding the two-dimensional material model on the cover plate. According to the invention, the two-dimensional material model is compacted by the piston, the situation that the graphic cover plate fractures and an instrument is damaged because of overdosage compaction of the two-dimensional material model is avoided; the problem that model filling is failed due to obvious deformation or collapse generated by insufficient compaction of the two-dimensional material model is solved; and the problem of multi-solution of a transportation conduction system due to invisible deformation or collapse generated by insufficient compaction of the two-dimensional material model is solved, therefore the authenticity of experiment phenomenon and experimental result is ensured.

The invention proposes an oriented danger removing method for a high mine pressure roadway of a coal mine. According to the method, the mode that transverse (the cross section of the roadway) pressure relief and longitudinal (in the walking direction of the roadway) pressure relief are combined is adopted. A set of drill holes are arranged in the direction of the roadway at the interval of 5m, when the side pressure coefficient is larger than 1.5, a bottom plate can be extruded to move downwards after horizontal stress is decomposed on the drill holes in the side of the roadway, a bottom plate fracture area is formed through pressure relief blasting of the drill holes in the two sides so that stress transmitted from the deep portion of the base plate can be cut off, and development of a heaving floor is weakened; crushing belts are arranged in the roadway at certain intervals and have the functions of spring bodies, energy brought by the horizontal stress in the walking direction of the roadway is absorbed, and the heaving floor phenomenon of the roadway is solved fundamentally.