A high ground stress excavation unloading cutting device

Abstract

A high ground stress excavation and unloading cutting device, including a cutting part connected to a rotating shaft, the cutting part is in the shape of a bullet, the outer periphery of the cutting part is provided with a plurality of pick-shaped picks, and the cutting part is provided with a first The impact head and the second impact head, the first impact head extends in the axial direction of the cutting part, its outer end protrudes from the top of the bullet head of the cutting part, and the outer end of the second impact head extends out of the outer peripheral surface of the cutting part , the inner end of the first impact head is connected to the first piston rod of the first hydraulic cylinder, the inner end of the second impact head is connected to the second piston rod of the second hydraulic cylinder, the first hydraulic cylinder and the second hydraulic cylinder are connected through three The two-way reversing valve is connected to the oil inlet circuit inside the rotating shaft. Through the control of the first hydraulic cylinder and the second hydraulic cylinder, the impact head can realize the impact on the front and side coal rocks respectively, so that the cutting part can enter the coal rock in the longitudinal direction and cut the coal rock horizontally. The impact unloading of coal and rock is realized in advance, so as to greatly reduce the wear degree of the pick-shaped pick during the coal and rock cutting process.

Description

technical field [0001] The invention belongs to the technical field of excavation unloading and cutting, and in particular relates to a high ground stress unloading and cutting device for excavation. Background technique [0002] The roadheader is the key equipment for rapid tunneling in modern mines. With the continuous development of coal mine tunneling technology, the speed of the roadheader has been increasing, but it still cannot meet the production demand, which seriously restricts the efficient and high-yield operation of mines in our country. The existing roadheader cuts and breaks the coal rock through the rotation of the pick-shaped pick at the cutting part. However, considering the high hardness of the high-stress coal rock in the actual deep well, the pick-shaped pick The wear and tear of the roadheader is very serious, which greatly affects the operating efficiency of the roadheader and increases the operating cost, and cannot meet the needs of high-stress coal ...

AI Technical Summary

Problems solved by technology

[0002] The roadheader is the key equipment for rapid tunneling of modern mine roadways. With the continuous development of tunneling technology in coal mines, the speed of the roadheader continues to increase, but it still cannot meet the production demand, which seriously restricts the efficient and high-yield operation of mines in my country.

The existing roadheader cuts and breaks the coal rock through the rotation of the pick-shaped pick at the cutting part. However, considering the high hardness of the high-stress coal rock in the actual deep well, the pick-shaped pick The wear and tear of the roadheader is very serious, which greatly affects the operating efficiency of the roadheader and increases the operating cost, and cannot meet the needs of high-stress coal and rock cutting in deep wells

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