30results about How to "Reduce drilling depth" patented technology

The invention discloses a segmented mining method which comprises the following steps: (1) segmenting an ore body into a panel and middle segments, dividing the panel into ore blocks, dividing the ore blocks into rooms and space pillars, dividing the ore body into middle segments along a height direction of the ore body and dividing each middle segment into sections, wherein the height of the middle segments is 50 to 60 m, the height of the sections is 14 to 20 m, the length and the width of the ore blocks are 80 to 100 m and 30 to 60 m respectively, the length and the width of the rooms in the ore blocks are 60 to 80 m and 15 to 30 m respectively, and the width of the ore pillar is 15 to 30 m; (2) stoping the units of the rooms: a step of stoping by using a segmented open-stope method and ore drawing by using a manner of bundle-hole combined funnel blasting; (3) cementing and filling mined rooms; (4) stoping the units of the space pillars, wherein stoping of a unit of the space pillars is carried out after stoping, cementing and filling of adjacent units of the rooms at two sides of the unit of the space pillars is finished; and (5) filling mined space pillars with water and sediment. The mining method can be used for large scale high efficiency mining of plateau ores.

The invention provides a hot-stamping die for an anticollision beam, comprising an upper die and a lower die, wherein the upper and lower dies mainly comprise combined convex/concave dies, cooling systems and a cooling seal ring. The blocks of the combined convex/concave dies avoid the corners and are staggered relatively. The cooling systems adopt drill holes, wherein the diameter of the holes is 8-30mm and the peaks of the holes are 3-10mm distant from the profiles; the two ends of the holes are sealed after hole drilling; runway type water troughs are processed near the places where the block dies are 10-50mm distant from the two end faces; the cooling water enters from one water trough and flows out of the other water trough; and seal grooves are arranged on the cooling water troughs and the cooling water troughs are provided with the seal ring and are externally connected with cooling water pipes.

The invention relates to a special anti-cracking bentonite-based composite drill hole backfill material for a ground source heat pump. The special anti-cracking bentonite-based composite drill hole backfill material comprises the following components in parts by weight: 200 parts of bentonite, 800 parts of quartz sand and 0.9 kg/m<3> of motar/concrete crack-resistant fibers. The special anti-cracking bentonite-based composite drill hole backfill material disclosed by the invention can be used for improving a large quantity of cracks caused by intergranular cohesion change and nonuniform expansion and contraction in the drying and wetting circulating process of a bentonite-quartz sand type drill hole backfill material and preventing the surface water from being downwards infiltrated by closely filling a drill hole. The special anti-cracking bentonite-based composite drill hole backfill material disclosed by the invention can be used for reducing the heat resistance inside the drill hole due to good engineering characteristic when adopted for filling the drill hole, and can be used for reducing the depth of the drill hole and the length of a U-shaped pipe, thus reducing the initial assembly cost of the ground source heat pump and being contribute to the popularization and application of a ground source heat pump air-conditioning system which is low in energy consumption and environmentally friendly.

The invention discloses an angle-adjustable engineering geological drilling rig. The engineering geological drilling rig comprises a base, a rotary tower, a winding machine and a drill rod component, wherein the bottom end of the rotary tower is hinged to the base and is provided with a tower locating device, and a fixed pulley is arranged at the top of the rotary tower; the winding machine is fixedly arranged on the base, a steel wire rope connected with the winding machine bypasses the fixed pulley and is connected with the drill rod of the drill rod component so as to realize punching promotion; the drill rod component is connected with the base through a detachable drill rotating disk, the rotating plane of the drill rod component is parallel to the rotating plane of the rotary tower, and a travelling device is arranged at the bottom of the base. According to the angle-adjustable engineering geological drilling rig, the existing engineering geological drilling rig can be improved, and the angle-adjustable engineering geological drilling rig is reasonable in structure, low in cost and high in usability; furthermore, inclined holes in any angle can be drilled by adjusting the angle between the rotary tower and the drill rod component, so that the work efficiency of the engineering geological drilling rig is greatly improved.

The invention provides a dual-U-shaped tubular heat exchanger for a soil source heat pump system. The dual-U-shaped tubular heat exchanger comprises a dual-U-shaped tube, multiple layers of heat tubeassemblies are axially and evenly arranged on the outer all of each vertical tube of the dual-U-shaped tube at intervals, the inner side ends of the heat tube assemblies penetrate through the outer walls of the vertical tubes to be inserted into the vertical tubes, and sealing treatment is conducted on the joints of the inner side ends of the heat tube assemblies and the outer walls, wherein annular heat tubes or multiple heat tubes can be adopted as the heat tube assemblies. According to the dual-U-shaped tubular heat exchanger for the soil source heat pump system, heat exchange between a medium in the U-shaped tube and soil is strengthened through the good heat conduction property of the heat tubes, the heat exchange efficiency is obviously improved, therefore, the drilling depth can bedecreased, then investment is reduced, and most of the heat exchange process is completed in the shallow stratum.

The invention relates to the building wall insulation system construction technology, and specifically refers to a pre-fixed plate system wall insulation system construction technology; the core of the technology is to use a drilling, pre-buried or bonding mode to lead out vertical outward thread rod from a base wall; the thread rods are bonded or hung with one or more layers of insulation plates; an outer side of the insulation plate is provided with thread caps in a screwing or knocking mode, thus firmly fixing the insulation plates on the base wall; then later polishing-plastering netting steps are followed. The pre-fixed plate system wall insulation system construction technology solves seepage and virtual fixation disadvantages of the conventional technology, optimizes a construction flow, ensures engineering quality, reduces construction cost, and has wide application in civil building and cold storage engineering.

A semiconductor structure includes an insulating layer, a plurality of stepped conductive vias and a patterned circuit layer. The insulating layer includes a top surface and a bottom surface opposite to the top surface. The stepped conductive vias are disposed at the insulating layer to electrically connect the top surface and the bottom surface. Each of the stepped conductive vias includes a head portion and a neck portion connected to the head portion. The head portion is disposed on the top surface, and an upper surface of the head portion is coplanar with the top surface. A minimum diameter of the head portion is greater than a maximum diameter of the neck portion. The patterned circuit layer is disposed on the top surface and electrically connected to the stepped conductive vias.

The invention relates to the field of railway bridges, in particular to a calculation method for the allowable single pile bearing capacity of following drilling method railway tubular piles. The calculation method is characterized by at least including the steps of calculating the allowable bearing capacity of each of soil around the tubular piles, soil around expansion head piles and soil on the bottoms of hole expansion piles, and combining the allowable bearing capacity for obtaining the allowable single pile bearing capacity of the following drilling method railway tubular piles. The calculation method has the advantage of realizing calculation of the allowable single pile bearing capacity of the following drilling method tubular piles. Compared with bored piles, the tubular piles have the advantages that the allowable single pile bearing capacity of the tubular piles can be effectively increased through the method, the pile length can be greatly reduced, the drilling depth can be reduced, the construction progress can be quickened, and the foundation construction period can be shortened. The economic benefit and the social benefit are remarkable.

The invention particularly relates to a construction method for improving the anti-pulling performance of a twisted steel anchor rod. The problems that when an existing construction method of the twisted steel anchor rod is applied, the length of an anchoring section exceeds the actual requirement by a large amount, resources are wasted, and labor and time are wasted are solved. The construction method for improving the anti-pulling performance of the twisted steel anchor rod comprises the following steps that S1, a plurality of vertical rib column grooves are vertically formed in the wall ofsurrounding rock; S2, a plurality of anchor rod holes are drilled in the bottom wall of each vertical rib column groove; S3, a plurality of anti-pulling resistance blocks are installed on the anchoring section of each twisted steel anchor rod; S4, the twisted steel anchor rods are placed into the anchor rod holes, and cement mortar is poured into the anchor rod holes; S5, steel bars of vertical rib columns and panels are bound, formwork erecting is conducted, and concrete is poured; and S6, the ends of the twisted steel anchor rods are sealed and anchored on the outer sides of the panels. Theconstruction cost is reduced, the construction progress is accelerated, and the method can be suitable for stone excavation high slope stability protection engineering and can be applied and popularized in similar engineering.

The invention relates to a wedge type inner anchor head, which comprises an anchor rod, multiple wedge blocks arranged surrounding the circumference of the outer wall of the anchor rod, and wedge seats sleeving the anchor rod, wherein one side, close to the outer wall, on the bottom part of each wedge block is hinged to the anchor rod; the wedge seats are located below the wedge blocks; the top surface of each wedge seat comprises a No.1 inclined plane, a horizontal plane and a No.2 inclined plane which are connected sequentially; the No.1 inclined plane and the No.2 inclined plane of each wedge seat are symmetrically arranged on two sides of the corresponding horizontal plane; included angles respectively formed between each No.1 inclined plane and the axis of the anchor rod as well as between each No.2 inclined plane and the axis of the anchor rod are acute angles; the anchor rod penetrates through the wedge seats through the horizontal planes so as to extend to the outer parts of the wedge seats. The wedge type inner anchor head is not only safe and reliable, and good in durability, but also beneficial to ensuring the anchoring force of the inner anchor head.

The invention discloses a handheld back bolt punching machine. A drilling angle die machine rotates to drive a drill bit to rotate, a limiting knob is rotated, the distance between a limiting block atthe lower end of a limiting screw and a punching face is adjusted, and therefore the punching depth is adjusted. A drilling connecting rod handle is downwards pressed, the drill bits conducts punching, and a hole expanding motor is a speed reducing motor. An upper oblique cutting block is driven, the engagement depth of the upper oblique cutting block and a lower oblique cutting block determinesthe deflection range, and the deeper the engagement is, the smaller the deflection is. The deflection hole expanding technology is completed by adjusting the engagement depth of the upper oblique cutting block and the lower oblique cutting block, the limiting depth of an adjusting rod is adjusted by rotating an adjusting screw, and the adjusting screw is locked through a locking knob after adjustment is completed. A deflection connecting rod handle is downwards pressed so that the engagement depth of the upper oblique cutting block and the lower oblique cutting block can be reduced, the drillbit is driven to do deflection movement, and the hole expanding effect is achieved. The engagement depth of the upper oblique cutting block and the lower oblique cutting block is adjusted through thedeflection connecting rod handle, and therefore the function of controlling the hole expanding diameter is achieved.