56results about How to "Reduce local damage" patented technology

The invention discloses a composite fracturing and uniform permeability-improving method for tree-like boreholes in coal seams of an underground coal mine. The composite fracturing and uniform permeability-improving method is suitable for permeability improvement of soft low-permeability coal seams, and is characterized in that a gas exhausting and mining hole serve as a mother hole, uniformly distributed self-advancing boreholes serve as tree-like son boreholes, and a tree-like borehole net is subjected to hole-sealing fracturing. Compared with a conventional hydraulic fracturing method, the composite fracturing and uniform permeability-improving method can realize uniform fracturing of the low-permeability coal seams to enlarge the fracturing range of single crossing boreholes, so that uniform permeability improvement is achieved, and the shortcomings that the crossing boreholes subjected to conventional hydraulic fracturing are low in utilization ratio, and a single major fracture can damage top and bottom beds are overcome. The composite fracturing and uniform permeability-improving method is simple to operate, large in permeability improvement range and good in permeability improvement effect and provides a guarantee for safety production of the underground coal mine.

The present invention relates to an open-pit mine excavation process, in particular, it relates to an open-pit mining process capable of quickly discharging earth to protect bank and making ecological restoration. It is characterized by that in one end of open-pit mine or its middle said invention adopts a conventional method, if the stripping and mining operation of initial stripping working face is completed, on the deposit mining direction the mining working face can be divided into left side zone, medium zone and right side zone, then they are further divided into several smaller subsections, every subsection can be used as an unit, on every subsection the processes of stripping, mining, backfilling and banking, cultivating-greening or covering with concrete are progressively adopted so as to implement the invented open-pit mining process.

The invention provides process for making contra-soluble nano-dispersions of at most sparingly-soluble materials in a soluble carrier material comprising the steps of: (i) providing a single phase mixture of: a) a solvent or a mixture of miscible solvents, b) at least one carrier material soluble in solvent (a), said carrier material being also contra-soluble to payload material (c) and solid at ambient temperature, c) at least one a payload material which is soluble in solvent (a), and, (ii) drying the mixture to remove solvent (a) and thereby obtain the carrier material (b) in solid form with payload (c) dispersed therein as nanoparticles.

The invention discloses composite fracturing and uniform permeability increasing equipment for treelike drilling in a coal seam of an underground coal mine. The whole equipment can be divided into a hole forming system and a fracturing system. The hole forming system comprises a drilling machine, a drill stem, a drill bit, a support, a water tank, a high-pressure pump, a winch, a propelling mechanism, a chuck, a high-pressure hose, a self-propelled drill bit and the like. The fracturing system comprises the water tank, the high-pressure pump, a pressure meter, a high-pressure rubber pipe, a hole sealing device and the like. The composite fracturing and uniform permeability increasing equipment is suitable for carrying out volume fracturing on the coal seam of the underground coal mine, can reach the effects of carrying out uniform permeability increasing on the coal seam and increasing the gas extraction rate, and is easy to operate and good in economic performance.

The invention discloses a three-way limiting buffering bridge anti-seismic stop dog structure and an arranging and installing method. The bridge anti-seismic stop dog structure comprises a steel corbel, a stop dog lower structure and a stop dog upper structure; the steel corbel is fixed to the side face, in the bridge axial direction, of the top of a pier close to a bridge movable supporting base, the stop dog lower structure is fixed to the top of the steel corbel through bolts, a groove is formed in the lower portion of the stop dog upper structure, the stop dog upper structure is fixed to the bottom of a main beam of the bridge through bolts, and an impact block is arranged on the upper portion of the stop dog lower structure. Relative large displacement between a beam body and the pier in the bridge axial direction, bridge transverse direction and vertical direction can be effectively limited, damage to the movable supporting base and expansion joints is reduced, and the beam body is prevented from falling in the bridge axial direction and bridge transverse direction and prevented from vertically getting away from the supporting base to cause damage on the supporting base, beam cocking damage and vertical impact damage between the beam body and the supporting base. The three-way limiting buffering bridge anti-seismic stop dog structure is simple in structure, convenient to construct, easy to repair and replace and suitable for new and old bridges.

The invention discloses post-tensioning self-resetting joints capable of multi-stage energy dissipation and an assembling method for the post-tensioning self-resetting joints. The joints can slide relative to one another, and provide energy dissipation under small deformation through a mode of unilateral friction between a T-shaped piece and a beam flange, with increasement of deformation of openings of the joints, an SMA damper connected with a T-shaped plate begins to enter a phase transition energy dissipation phase, and introduced metal damping cannot increase residual deformation of the joints at the same prestress level; and for avoiding the characteristic of low redundancy of the post-tensioning joints, contact pressure-bearing of a bolt rod connecting the T-shaped piece and the beam flange and the oblong hole wall of the beam flange is allowed through an oblong hole, and under extreme conditions, collapse can be effectively resisted. According to the post-tensioning self-resetting joints, under small to middle seisms, friction damping is used for energy dissipation, energy dissipation in a combined energy dissipation mode can be realized by cooperating with SMA phase transition under middle to large seisms, and by means of post-tensioning prestress reinforcements, complete resetting is realized; and under the extreme conditions, joint force transfer is transformed intocollapse resistance in a hole wall pressure-bearing mode, and multi-stage energy dissipation and the multi-redundancy property are realized.

The invention discloses a universal through-endoscope puncture instrument for multiple organs. The universal through-endoscope puncture instrument for the multiple organs comprises a V-shaped component, a flexible plastic tube, a flexible needle tube, a guide wire and an external fixator. The universal through-endoscope puncture instrument with the fixed length is applicable to puncture suction through an alimentary canal ultrasonic endoscope, applicable to puncture suction through a trachea ultrasonic endoscope, and also applicable to intravascular injection, submucosal injection, deep biopsy and the like through a common direct-sight endoscope, and the requirement that the guide wire can be not pulled out in the process of puncture is met.

The invention relates to a bridge bearing platform composite material collision post, comprising a composite material shell (5); the bridge bearing platform composite material collision post is characterized in that: the vertical wall of the composite material shell (5) is composed of a composite material surface layer (1), a sandwich material layer (2) and a resin based fiber sandwich composite material inner layer (6), the sandwich material layer (2) is clamped between the composite material surface layer (1) and the resin based fiber sandwich composite material inner layer (6), a filling material layer (3) is filled in the composite material shell (5), mounting ears (7) are formed by respectively extending to two sides, facing to one surface of the bridge bearing platform, a mounting hole (4) which is used for being penetrated by a bolt to fix the collision post on the bridge bearing platform is arranged on the mounting ear (7); the bridge bearing platform composite material collision post has simple structure, reliable and perfect anti-collision function and long service life, and is convenient for maintenance and repair.

A preparation method for bone-ash ceramic comprises the following steps: preparing raw materials, specifically performing mechanical beating on raw materials, sieving with a 200 mesh sieve for usage; performing mixing pulping on the prepared raw materials for usage; utilizing pressure to form a green body; drying at 500-600 DEG C; after drying is performed, placing at 0-5 DEG C for 1-2 h; glazing at normal temperature; and putting in a kiln and sintering for forming. According to the preparation technology, roasting for obtaining a green body can be finished at a relatively low temperature, and the prepared bone-ash ceramic has excellent heat stability, high qualified rate and low production cost.

The invention provides application of a traditional Chinese medicine composition in preparing medicine for treating and/or preventing laryngo-pharyngeal reflux. The traditional Chinese medicine composition comprises, by weight, 10-12 parts of pinellia ternate preparata, 12-15 parts of poria cocos, 9-12 parts of mangnolia officinalis, 6-15 parts of ginger and 6-10 parts of perfilla leaf.

The present invention provides a display device. By setting opposite surfaces of the substrate and the hard coat layer of the glass cover plate as uneven structures, not only flatness of the glass cover plate can be ensured, but also stress can be dispersed under point impact. Meanwhile, upper and lower sides of the protection layer are provided with uneven structures at the same time, such that the stress can also be diffused, and the buffer layer is formed by flattening the upper and lower sides of the protection layer to make the entire buffer layer smoother. The display device of the present invention can increase resistance to point impacts and reduce local injuries.

The invention relates to a bridge anti-seismic chock block invention field, and specifically relates to a bridge prefabricated may reset energy dissipation anti-seismic check blocks. The device comprises a back plate, a front plate, a U-shaped plate, a connecting rod, a spring, a soft steel, a bolt, a gasket, a stiffening rib, a bolt hole, a track; the front plate back plate consists of a plurality of sleeved with a spring, the connecting rod and the front plate are welded, the other end of the connecting rod passes through the corresponding hole on the back plate through a bolt after the backing plate at the limit connecting rod is pulled out of the back plate, the left side and the right side plate of the U-shaped plate is provided with a plurality of bolt holes, the baffle block throughthe bolt connected to the cover beam, and this connection can be fabricated connection mobility. According to the device, compared with the traditional stop block, the structure is simple, the stressis clear, the conventional check block and a main beam of the rigid collision into flexible collision, slowing down the seismic action on the main beam and the baffle block, reducing the impact of the stop block and the local damage of the main beam.

The invention discloses local anesthesia gel preparation and a preparation method thereof. The local anesthesia gel preparation is prepared from, by weight, 8-20 parts of Celastrus orbiculatus, 8-20 parts of benzoin, 2-2.8 parts of bee venom, 0.1-2.0 parts of etamsylate, 0.3-1.0 part of benzoate, 3-5 parts of menthol, 2-3.6 parts of diclofenac, 1.0-1.5 parts of sodium fusidate, 1.5-3.5 parts of local anesthetic, 2.3-4.0 parts of viscous polymer, 0.05-0.3 part of preservative, 0.05-0.1 part of antioxidant, 0.2-0.6 part of surfactant and 10-16 parts of gel matrix. The local anesthesia gel preparation can be used for local administration of trauma or during small external surgery, can play a good role in controlling pain, resisting bacteria, diminishing inflammation and preventing wound infection, can reduce local damage, has high affinity with skin and is convenient to use and quick in action; anesthetic action generated by the local anesthesia gel preparation can quickly seep into collenchyme and can last for a long time, and the local anesthesia gel preparation is safe and nontoxic, simple in preparation process and low in cost.

The invention provides application of a traditional Chinese medicine composition in preparing a medicine for treating and/or preventing laryngopharyngeal reflux. The traditional Chinese medicine composition is prepared from the following raw medicines in parts by weight: 10-12 parts of prepared pinellia tuber, 12-15 parts of tuckahoe, 9-12 parts of officinal magnolia bark, 6-15 parts of ginger and 6-10 parts of perilla leaves.

The invention discloses a novel anti-collision column which comprises a square column body and further comprises four anti-collision plates and three or more compressed springs. The outer side surfaceof each anti-collision plate is a rubber layer, the anti-collision plates are matched with the side surface of the square column, the anti-collision plates are connected to the peripheral surface ofthe square column body through the compressed springs, the two ends of the compressed springs are fixedly connected between the inner side surfaces of the anti-collision plates and the square column body correspondingly, and the compressed springs are uniformly distributed on the inner side surfaces of the anti-collision plates. The problems that in the prior art, the requirements for the strengthand the rigidity of the column are high, and local damage is likely to cause are solved.