U-shaped steel supports are mainly used for mine tunnels, secondary support of mine tunnels, and support and support of mountain tunnels. The use of U-shaped steel brackets can effectively reduce the occurrence of accidents such as roof fall and sheet gangs, which is safe and reliable, and improves the stability of the mine ventilation system. The use of U-shaped steel retractable brackets can better solve the problem of heading support.
1. U-shaped steel bracket withstands large pressure, long support time, and has the characteristics of easy installation and deformation.
2. Compared with other rigid supports, U-shaped steel supports have the characteristics of shrinkability and stable and reliable bearing capacity, adapting to the load and deformation of soft surrounding rocks.
3. The U-shaped steel bracket has a high cross-section utilization rate, and the bracket is easy to support. The maintenance amount is small.
4.The U-shaped steel bracket has a high recycling rate, which reduces the use of pit wood and has obvious environmental benefits.
U25 steel bracket, U29 steel bracket, U36 steel bracket, 25U steel bracket, 29U steel bracket, 36U steel bracket
Mine support steel is a type of steel with a horizontal street like the English letter "U", and sometimes the horizontal street has the shape of the Japanese letter "ひ". Mine supporting steel is mainly used for mine support. U-shaped steel brackets can be made according to drawings, and the quality is stable, safe and reliable.
|Serial number||Model Name||Height (mm)||Thickness (mm)||Theoretical weight (kg / m)|
|1||18U mining support steel||99||10||18.96|
|2||25U mining support steel||110||17||24.76|
|3||29U mining support steel||124||16||29|
|4||36U mining support steel||138||17||36|
The single hydraulic prop is suitable for inclined coal seam mining face with coal seam inclination angle less than 25 ° -35 °. The adaptable coal seam roof and floor conditions are: backward roof does not affect the recovery of the pillar, the floor should not be too soft, and the pillar is pressed into the floor without depth Deteriorate the integrity of the bottom plate, otherwise the base should be enlarged. When the coal is used in a softer blasting working face, protective measures are taken on the surface of the coating of the live cylinder to prevent collapse. When the pillar is matched with the wooden top beam or used as a point column, the top cover should be replaced with a column cap to avoid damage to the wooden beam.
New modern repair methods for single hydraulic props are based on polymer composite materials, of which the most mature application is the Meijiahua technology system. It has excellent adhesion and good pressure resistance. It can not only meet the production and use requirements under the above conditions, but also the operation process is simple and easy. There is no heat effect and the thickness of the coating is not limited. At the same time, the coating itself has excellent oil and corrosion resistance and self-lubricating functions, which ensure the wear resistance after repair, ensure the normal production of the enterprise, and avoid the deterioration of equipment components.
|Serial number||Model Name||Height (mm)||Working stroke (mm)||Rated resistance (kn)||Working pressure (MPA)||Initial support force (KN)||Hydraulic cylinder diameter|
|1||DWB22 lightweight single hydraulic prop||2240||570/820||30||3.8||30||100|
|2||DWB25 light single hydraulic prop||2500||570/820||30||3.8||30||100|
|3||DWB28 light single hydraulic prop||2800||570/820||30||3.8||30||100|
|4||DWB35 light single hydraulic prop||3150||570/820||30||3.8||30||100|
Suspension type single hydraulic prop is a type of external injection type single hydraulic prop, but it has a significant advantage over external injection type single hydraulic prop, that is, the DWX type single hydraulic prop adopts the principle of plunger suspension technology to suspend The force reaches four-fifths of the working resistance, and the force on the column is only one-fifth. The DWX pillar three-purpose valve is set on the handle body. During the injection, the three-purpose valve does not rise with the rise of the movable pillar of the pillar. , Easy to operate, safe and reliable.
DWX type pillars are no longer provided with arc welding seams which are difficult to guarantee on the pillars, which also improves the strength and reliability of the pillars, avoids hidden dangers such as roof fall caused by weld fractures, and ensures the safety of workers.
Double telescopic suspension type single hydraulic prop is a new generation single-face support product developed by China University of Mining and Technology. It is the supporting equipment of high-end mechanized mining face and the end support equipment of fully-mechanized mining face. It is suitable for roof support of coal mining face, head roof support of fully mechanized mining face, and advanced support for roadway tunneling. Suspension type single hydraulic prop is a type of external injection type single hydraulic prop, but it has a significant advantage over external injection type single hydraulic prop, that is, the DWX type single hydraulic prop adopts the principle of plunger suspension technology to suspend The force reaches four-fifths of the working resistance, and the force on the column is only one-fifth. The DWX pillar three-purpose valve is set on the handle body. During the injection, the three-purpose valve does not rise with the rise of the movable pillar of the pillar. , Easy to operate, safe and reliable.
1. With strong anti-eccentricity and greater stability. 2.High reliability
3. Light weight 4. Large working stroke 5. High strength 6. Easy to use
7. Low repair and maintenance costs 8. Use neutral water
Single hydraulic props are generally divided into external injection type single hydraulic props, internal injection type single hydraulic props, suspension type single hydraulic props, and friction props. The internal injection type single hydraulic prop has its own pump and the same. When it is supported, it can quickly rise the column by shaking with a hand crank. The working fluid is not discharged when the column is lowered, which can better protect the working environment, and is convenient and easy to manage. Flexible and simple to equip. At present, the main use is a cylinder diameter of 90mm, from the 0.6-3.15m, there are 12 specifications of the injection-type single hydraulic prop.
The general model is DN18-250 / 80, D is the single pillar, N is the inner injection type, 18 is the maximum height of the pillar is 1800mm, 250 is the working resistance of the pillar is 250kn, 80 is the cylinder diameter of 80mm.
Pipe joint anchor is also called “rock friction stabilizer”. Pipe joint anchor is a very specialized support product. It is an advanced material used for underground culvert roof and other engineering support. It has a simple manufacturing process and is easy to use. It has strong anchoring force, large tensile strength, and strong expansion force in the downhole anchor shotcrete support, so that the entire roof is integrated.
(1) Initial anchoring force: 3 ~ 7 tons;
(2) Pull-out load of pipe ring: 8 ~ 10 tons;
(3) Tensile strength of anchor pipe: 12 ~ 13 tons;
(4) The corrosion resistance is 20-30% higher than that of A3 steel, which is conducive to long-term use.
FRP anchor rod is made of glass fiber yarn, resin, curing agent, etc. through extrusion, drawing, and high temperature curing. The shape of the anchor rod body is full thread, and the thread is left-handed or right-handed. It has high tensile strength, easy to cut, does not damage the picks, does not generate sparks, safe coal mining efficiency, light weight, high corrosion resistance, flame resistance, antistatic performance, can be permanently supported, it is a substitute for metal anchors New composite reinforcement products.
|Serial number||Model Name||Tensile force of rod (kN)||Tensile strength of rod (MPa)||Bearing capacity of thread (kN)|
|1||FHJ-18 FRP anchor||140||650||50|
|2||FHJ-20 FRP anchor||180||620||80|
|3||FHJ-25 FRP anchor||185||510||80|
|4||FHJ-32 FRP anchor||285||480||120|
Plastic expansion sleeve anchors are called recyclable anchors. The specific models are 32 and 42. The plastic expansion sleeve anchors produced by our company are assembled from plastic cones and plastic expansion sleeves, metal rod bodies and accessories. Anchor. The plastic expansion sleeve anchor has light weight, small volume, compact structure, convenient installation, fast operation, long service life, large anchoring force, and metal rod body can be recycled and reused when it needs to be recovered.
The advantage is that the plastic cone is pulled by the metal rod body, so that the plastic expansion sleeve is tightly attached to the rock hole wall to achieve anchoring. The anchor rod abandons the traditional resin bonding mode and does not require an anchoring agent. Save money, reduce labor intensity, reduce transportation volume, save energy, reduce support costs, can be widely used in coal mine roadways, culverts, tunnels and other security support areas.
Left-handed ribless steel-reinforced resin anchor bolts have high strength, reasonable structure, large pre-tightening force, can automatically adjust the direction of stress, increase the restraining force on surrounding rocks, and can achieve rapid mechanical installation. Bolt strength is high, Reasonable structure, large pre-tightening force, can automatically adjust the direction of the force, increase the restraining force on the surrounding rock, and can achieve rapid mechanical installation
Right-handed anchor is also called equal-strength rebar anchor. It is a tool for measuring anchoring force. It has the characteristics of small size, light weight, easy to carry, simple operation, and safety. And other tunnel operations.
Rebar anchors are widely used in mine roadway support for coal mines, railways, and hydropower. The full-length and full-strength anchor bolts have the same strength, which is 40% higher than the carrying capacity of anchors of the same specifications. The scope of the anchor rods has been expanded to realize end anchors, extended anchors and full anchors; easy operation and low price.
The full-length and full-strength anchor bolts have the same strength, which is 40% higher than the carrying capacity of anchors of the same specifications. The scope of the anchor rods has been expanded to realize end anchors, extended anchors and full anchors; easy operation and low price.
The full length of the rod body has rolled continuous threads with equal strength throughout the length; a prestressed washer and a ball nut are provided at the fastening end.
Hollow Grouting Anchor Details 1. Anchor Head: The barbs on the anchor head can locate the anchor rod in the drilled hole and ensure that the rod body is well centered. 2. Anchor body: the most important construction in the assembly, which plays a major role in anchoring and supporting. 3. Stopper: Keep the grouting pressure during the grouting process so that the grout can fully fill the surrounding rock gap.
1. Combine the functions of the anchor rod and the grouting pipe into one. When grouting, it is a grouting pipe. After the grouting, it does not need to be dialed out to become an anchor rod.
2. The hollow design enables the anchor to realize the function of the grouting pipe and avoids the loss of mortar caused by the traditional construction process when the grouting pipe is pulled out.
3. The grouting is full, and pressure grouting can be realized, which improves the engineering quality.
4. The rod body is well centered, and the mortar can wrap the full length of the anchor body to avoid the danger of rust and achieve the purpose of long-term support.
5. Convenient installation, without the need to process the thread on site, it can easily install the pad and nut.
6. Combined with the special bolting grouting pump and grouting technology, it is the only anchoring system in China that completely solves many problems of traditional anchoring support.
The metal hinged top beam is a medium-sized top beam. The beam body is made of 8 # π steel butt welding, and the cross-section height of the beam body is 70. This type of top beam is an articulated top beam. It can be combined with various types of individual metal pillars to form a metal support. It is a high-strength top beam for coal mines to support in horizontal and gently inclined working faces. Because this type of roof beam cantilever supports the roof plate above the conveyor lane in front of the coal wall of the working face, there is a large unsupported space between the coal wall and the pillar. Therefore, it provides conditions for the adoption of new coal mining machinery and flexible conveyors to achieve general mechanization of coal mining. It is a necessary supporting equipment for high-end general mining and new high-end mining technology.
1: Material: 27simn
2: width 100mm. Height 90mm thickness: 8mm
3. When the bearing capacity is 700mm, the load is concentrated in the center of the beam;
4. Weld weight with weight of 0.7kg / m;
5.Add a specification for each 200mm difference in the model specifications
W steel belt and steel guard plate is a new type of mine support and tunnel support material. This product can be used with various anchors to organize and combine anchor brackets. It is widely used in coal mine underground roadways, railway tunnels, working faces, The support of tunnels and other fields in roads is more effective for handling unstable surrounding rocks.
1. The bending section modulus of W steel strip is increased by 37 times;
2, W steel strip steel increased about 70 times;
3. The hardening effect of the W-shaped steel strip during cold rolling improves the tensile strength by 12% -15%;
4. The W-shaped steel belt is easy to stick to the surrounding rock;
5. The W-shaped steel strip has a high cross-section utilization rate, saves materials, and has a low price.
The π-shaped steel beam is the most commonly used roof beam in the roadway support. The π-shaped steel beam is made of two π-shaped steels after heat treatment butt welding, and its name is therefore derived. π-type steel beams are mainly used for the roof support of coal mine tunnels or roadways, and a metal support is combined with a single pillar to support the roof beam.
(1) Strong overall support. For the influence of geological structure, the supporting effect of the broken roof is obviously better than that of the hinged roof beam.
(2) Wide range of mining schedule adaptation. The opening progress can be large or small, especially when the roof of the coal seam changes during the mining process. The maximum progress is more than 1m, which greatly improves the coal seam production capacity and the circulation output, thereby increasing the unit yield.
(3) The workload of the three railways is reduced. Because the π-beam support process and support process are continuous, it is difficult to lose the pillars on the working face, and when the hinged top beam is supported by the soft top, the hard top and single column are not provided. It takes a long time to cross the work surface from the soft gang to the hard gang and it is easy to lose. At the same time, the π-beam and the single column are always in the working state during the entire process, and there is no process of falling to the ground, which increases the initiative of the management of the three railways. Compared with the hinged top beam, the π-shaped beam eliminates the use of horizontal pins, which reduces the investment and the possibility of loss.