115 results about "Seismic safety" patented technology

The present invention discloses a detection method of coal mine underground reservoir coal pillar dam body earthquake safety. The method comprises the following steps of 1: establishing a numerical value model for a to-be-detected coal mine underground reservoir; 2: utilizing a numerical value simulation method to analyze, primarily determining the possibly damaged positions Ai on a coal pillar dam body of the coal mine underground reservoir on an earthquake condition; 3: designing a similar material physical model according to a numerical value result in the step 2, and carrying out a vibration test on the similar material physical model; 4: obtaining the shearing stresses tau i of the damaged positions Ai according to a vibration test result in the step 3; 5: calculating the earthquake safety coefficients Ki of the damaged positions Ai. The method of the present invention can evaluate the seismic safety of the coal mine underground reservoir coal pillar dam body on the mine earthquake or earthquake condition, and can give out a quantitative evaluation result of the coal mine underground reservoir anti-seismic property by aiming at the structure of the coal mine underground reservoir, and combining the rock breaking theory, the numerical value simulation method and the physical model test.

The present invention relates to an overturning operating disassembly type bevel edge earthquake safety door which can still be opened under the condition that door and windows are extruded to be jammed in earthquake. The earthquake safety door consists of a transversely overturning operating disassembly type bevel edge earthquake safety door and an up-down overturning operating disassembly type bevel edge earthquake safety door. The components of the two doors are all provided with a safety door surrounding pane. The inner edge of the pane is a bevel and is provided with a bevel demountable safety door, the edges of which are all bevels which are matched with the inner edge bevel of the connected pane. Four bolts, pins which are movably connected with connecting rods, a safety door disassembly operating rod, an overturning shaft and two operating bolt flexible overturning plates are arranged in the bevel demountable safety door. Four connecting rods are extended from two overturning plates and are provided with four pins by movable connection. Four connecting rods are mounted with four bolt springs and four spring catch bases. Four movable bolts are exactly opposite to four bolt holes, a doorframe, etc. The invention has the characteristics and advantages that the overturning operating disassembly type bevel edge earthquake safety door is just as adding a safety door in the ordinary door; people can pass through the safety door usually, the difference lies in that the safety door is connected with the pane bevel by the bevel; according to the theory that the bevel is not jammed easily by extruding slide, when earthquake occurs, the ordinary door is extruded, deformed and jammed and can not be opened, the bevel demountable safety door can also be opened; the safety door is simple and fast for operating and also has the prior nice and theftproof functions.

A large-corner high-friction shock-absorbing and shock-isolating support comprises a left laminated rubber block and a right laminated rubber block, a bottom plate, a lower seat board, a middle seat board, an upper seat board, a low-friction-coefficient friction pair, a high-friction-coefficient friction pair, a shearing pin, a stopper and a vertical follower mechanism, wherein horizontal displacement occurs between the upper seat board and the bottom plate, and the laminated rubber block has shearing deformation for providing a restoring force; both the stopper and the shearing pin are used for bearing the horizontal force; the stopper has relatively high designed bearing capacity and cannot be destroyed under the action of any earthquake; the shearing pin has relatively low designed bearing capacity and can be sheared under the action of a great earthquake; the low-friction-coefficient friction pair is used for meeting requirements of corners; the high-friction-coefficient friction pair is used for dissipating earthquake capability. The large-corner high-friction shock-absorbing and shock-isolating support provides vertical bearing capacity and horizontal bearing capacity in normal use, can meet the requirement for deformation of relatively big corners of a long-span bridge and a long-span spatial structure, effectively reduces the seismic response of a bridge structure under the action of the earthquake, and ensures the anti-seismic safety of the bridge.

The invention belongs to the technical field of anti-seismic safety and particularly relates to a multidimensional composite tensile-bearing-type anti-seismic joint device. The multidimensional composite tensile-bearing-type anti-seismic joint device is constituted by a special-shaped steel base, an anchoring component, a spherical cage universal coupling, damping and energy-consumption tensile-bearing rods, a bolt, an aluminum alloy cover plate, a rubber damping pad and rubber strips. The anchoring component and a concrete beam are poured together, so that the special-shaped steel base and the concrete beam are connected into a whole; one end of the aluminum alloy cover plate is connected with the special-shaped steel base through screws, and gaps between the aluminum alloy cover plate and the special-shaped steel base are filled with the rubber strips. The special-shaped steel base and a net-shaped composite damping and energy-consumption unit are connected through the spherical cageuniversal coupling, and the composite damping and energy-consumption unit is constituted by a large quadrilateral structure constituted by the damping and energy-consumption tensile-bearing rods, andthe rubber damping pad arranged in a quadrangle in a filled mode. Multidimensional change of anti-seismic joint deformation can be achieved in the vibrating direction, the material property is sufficiently utilized, the anti-seismic and damping efficiency is improved, and the good composite damping effect is achieved.

The invention discloses a liftable double-layer anti-seismic safe bed. The liftable double-layer anti-seismic safe bed is mainly used for protecting a sleeping person when earthquake occurs and comprises a bed frame, a controller, an upper protection structure, a rotatable bed plate structure and a liftable bed plate. A person is dropped into the bed and upper and lower layers are turned over to form a triangular protection bed plate structure so that the bed strength is improved. Most of parts are connected through threads or hinges so that installation and use are convenient. The liftable double-layer anti-seismic safe bed utilizes the principles of the motion dead point and the triangular structure stability so that the whole bed strength is greatly improved. The liftable double-layer anti-seismic safe bed solves the problem that the existing anti-seismic bed is heavy, has poor anti-seismic effects, is mounted through complicated processes and is expected to be promoted and applied.

The invention relates to a rotating thin-shell duplex type house anti-seismic safety survival facility manufactured by thin plates, which comprises two hemispheres arranged at two ends, the two hemispheres are connected into an integral structure through a middle cylinder body, a door is arranged on the middle cylinder body and a ladder is arranged at the lower part of the door; and the lower parts of the two hemispheres are connected with leg seats respectively, distributors for impact pressure uniform distribution are arranged at the upper parts of the two hemispheres, laminated plate springs are arranged at the upper parts of the distributors for impact pressure uniform distribution and friction shock absorbers are arranged at the upper parts of the laminated plate springs. After the rotating thin-shell duplex type house anti-seismic safety survival facility manufactured by the thin plates is well assembled, the friction shock absorbers at the upper part pushes against the lower surface of a reinforced concrete prefabricated plate of a roof or a beam of a one-storey house, when the wall goes down and the house is collapsed during an earthquake, impact force on the house is firstly born by the friction shock absorbers, after shock absorption and cushioning, the impact force is greatly weakened, then the impact force is attenuated by the laminated plate springs, the remainingimpact force is shared by a shock absorption rubber pad between units and the distributors for impact pressure uniform distribution are further used for uniformly distributing the remaining impact force onto the pressure bearing plate units.

The invention belongs to the field of petroleum and natural gas fracturing transformation, and relates to a step type pulse circulation temporary plugging complex fracture network fracturing method for a deep low-permeability reservoir. The method includes the steps of ground and borehole preparation; perforation; cracking; complex fracture network generation; sand adding; temporary plugging; circulation pulse fracturing and the like. A pulse hydraulic energy generation tool with a bottom seal is matched, and a complex fracture network is formed in the deep reservoir through pulse circulationimpact fracturing, fatigue damage and temporary plugging steering, so that the problem that the complex fracture network is difficult to form in the deep reservoir is solved, the induced microseism amplitude is reduced under the low crack initiation fracturing condition, and the fracturing transformation operation efficiency, effectiveness and earthquake safety are improved. The step type pulse circulation temporary plugging complex fracture network fracturing method for the deep low-permeability reservoir is also suitable for repeated fracturing transformation of the low-permeability reservoir.