Hydraulic Roof Support Details

The hydraulic roof support is a structure used to control the pressure of the coal mining face. The mining ballast acts on the hydraulic support in the form of external load. In the mechanical system of the interaction between the hydraulic support and the surrounding rock of the mining face, if the combined force of the supports of the hydraulic support and the combined force of the external load acting on the hydraulic support by the roof are exactly the same line, the hydraulic support is very suitable for the surrounding rock of the mining face .

Hydraulic roof support is an important part of fully mechanized mining equipment. It can reliably and effectively support and control the roof of the working face, isolate the goaf, prevent the gangue from entering the working face and push the conveyor. It is used in conjunction with coal mining machines to realize comprehensive mechanization of coal mining, solve the contradiction of roof management lagging behind coal mining in mechanized coal mining, further improve and increase the efficiency of coal mining and transportation equipment, reduce the labor intensity of coal workers, and ensure Safety of coal miners' lives.

Classification of hydraulic supports

There are many types of hydraulic supports. According to the interaction with surrounding rock, they can be divided into three types: support type, shield type and support shield type;

According to the moving method, it can be divided into two types: integral self-moving type and step forward moving type;
According to the place of use, it is divided into two types: working surface support and end support;
According to the thickness of the coal seam and the mining method, it is divided into a networked support and a hydraulic support for the top coal caving.

Performance characteristics of hydraulic supports:

In recent years, the research and development of hydraulic supports in our country has developed rapidly, from basically relying on imports to developing by self-designing and self-manufacturing, with a wide range of varieties, complete functions and reliable quality.

Important performance characteristics:

1. Good vertical and horizontal stability;

2. Strong protection performance;

3. Fast moving frame;

4. Strong adaptability to the top plate.

Supporting and shielding hydraulic roof support product introduction:

The supporting and shielding hydraulic roof support is a type of support developed after the supporting support and the shielding support. It can be applied under the conditions of broken roof, medium stable roof, stable roof and soft roof. The supporting and shielding bracket is mainly a kind of bracket which is mainly used for support and also has the function of shielding.

The supporting and shielding type bracket includes 6 major structures, namely: coal seam, the position of the front end of the roof beam, the roof beam, the shield beam, the base and the pillar. The rear part of the base is hinged with the front and rear connecting rods, and the front welding ear plate is used to install the push jack. The other end of the push jack is connected with the working surface conveyor. Through the expansion and contraction of the push jack, the pushing and sliding movement and the moving frame are realized.

Supporting and shielding hydraulic support product features:

(1) The supporting capacity is large, the top beam is in good stress state, and the top cutting performance is strong.

(2) It has a shield beam, which can effectively separate the working area and the goaf area to prevent the gangue from passing people.

(3) The support has good stability and a large working space, which is convenient for ventilation and pedestrians.

(4) The structure is relatively complicated, the steel consumption is large, and the cost is high.

Supporting and shielding hydraulic support product advantages:

One of the advantages of the support shield is that the vertical support force is far away from the coal wall, which means that the support effect of this type of support will be better for the roof protruding from the rock surface. In addition, its contact pressure with the top and bottom plates is relatively uniform, and the maximum contact pressure is relatively small, which has high stability. However, the multiple thrust paths generated by the front and rear pillars of the shielded hydraulic support affect the support effect of the support in the formation prone to voids. The thrust of the rear pillar of the support causes the top beam to produce a counterclockwise rotational displacement, thereby reducing the non-contact area between the top beam and the bottom plate, making the top slab more hollow, and causing the front pillar to bear all pressure loads. Decrease supporting capacity.