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86results about How to "Improve damage" patented technology

Coal mine gob-side entry retaining side supporting method

The invention discloses a coal mine gob-side entry retaining side supporting method. The coal mine gob-side entry retaining side supporting method comprises the following steps of supporting the coal mine gob-side entry retaining side through intensive individual hydraulic supporting columns; constructing anchor cable supports for the gob-side entry retaining top plates based on the original rocker bolt supports, enabling the gob-side entry retaining to adopt double-line rocker bolt supports, enabling the distance between the rocker bolts to be 2 m and the row distance to be 2.2 m and enabling the anchor bolts which are close to one side of the coal wall to be installed along a certain inclination angle and the anchor bolts which are close to one side of a gob to be installed perpendicular to the top plates; constructing a row of single hydraulic supporting columns on the inner side of the intensive single hydraulic supporting columns after the designed pretress of the anchor bolts is achieved and enabling the column distance to be 1.2 to 1.5 m; enabling the insensitive single hydraulic supporting columns to be out successively from back to front and enabling supplement single hydraulic supporting columns and the installed anchor bolts to be formed into a gob-side entry retaining side auxiliary supporting system. The coal mine gob-side entry retaining side supporting method solves the problem that the gob-side entry retaining side supporting is difficult.
Owner:BEIJING HAOHUA ENERGY RESOURCE

Swimming exercise and low-fat diet coordinated intervention method for hypertensive rat in development stage

InactiveCN107751109AImprove damageMaintenance of learning and memory and hippocampal synaptic plasticityAnimal husbandrySwimming exerciseSynapse
The invention relates to a swimming exercise and low-fat diet coordinated intervention method for a hypertensive rat in the development stage. By means of the method, the defects are overcome that thecontent of the fat in an existing low-fat diet is uncertain, and the low-fat diet has negative effects on the neural development learning and memorizing functions of the hypertensive rat in the development stage. In the method, the swimming exercise (60 minutes a day and six days a week) and low-fat diet (the energy supply of the fat is 10.7%) coordinated intervention is provided, the neural development of the hypertensive rat in the development stage is ensured, and meanwhile, the blood pressure decreasing effect is achieved. The blood pressure decreasing effect of the coordinated intervention method on the hypertensive rat in the development stage is better than that of a separate swimming exercise or low-fat diet method on the hypertensive rat in the development stage, meanwhile, the damage of the low-fat diet to the spatial learning and memorizing ability and the hippocampal neural synapse plasticity of the rat is reduced, and the neural development learning and memorizing functions of the hypertensive rat in the development stage are promoted.
Owner:TIANJIN MEDICAL UNIV

Upper step base plate minimally invasive blasting structure and minimally invasive blasting excavation method for maintaining tunnel step stability

The invention relates to the technical field of related tunnel construction, in particular to an upper step base plate minimally invasive blasting structure. A base plate hole is formed in a base plate area of an upper step; the base plate hole comprises bottom angle holes positioned at two horizontal ends, and a middle hole set positioned between the two bottom angle holes; the bottom angle holesadopt detonating cord explosive string structures; a horizontal adjacent hole adopts an air interval explosive loading structure; a vertical adjacent hole is designed according to a conventional light blasting hole; the middle holes beyond the horizontal adjacent hole adopt continuous explosive loading structures; the base plate hole blasting sequence is from middle in sequence; one section of afirst blasthole on an adjacent upper row is behind; through design of hole net parameters of the base plate hole, the explosive unit consumption, the explosive loading structures and the blasting network, the lower step free surface damage degree of the base plate hole is improved; and the rock looseness is better after blasting of the base plate hole, so that the base plate blasting minimally invasive molding in a micro step method is realized.
Owner:中铁二局第二工程有限公司

Inner case separately opened safe case

The invention relates to an inner case separately opened safe case. The inner case separately opened safe case comprises a housing and a support arranged inside the housing, wherein the housing is anairtight cavity with an opening in one side, the inside of the support is provided with a core unit which is equally divided into four square storage cavities, the rear end of every storage cavity isprovided with a hydraulic rod which is controlled by a switch plate above the support, and one side of the support is movably connected with two doors which can close the opening of the housing; the top of the support is slidingly connected with a motor which drives a motor shaft to rotate, the motor shaft is provided in a sleeve mode with a first worm and a second worm, in which pawls are hinged,the motor shaft is also fixedly provided with a ratchet wheel matched with the pawls, and by means of the ratchet wheel, the first worm and the second worm rotate in opposite directions; the first worm is driven by a rotating module to drive a laser source to move, the laser source controls the switch plate, and the second worm drives the doors to open and close through an opening and closing module. The inner case separately opened safe case is small in space occupation and high in safety coefficient, and with multiple storage spaces in one safe case, enables multiple users to separately usedifferent storage cavities.
Owner:温岭市山市金德利电器配件有限公司
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