High ground stress tunneling unloading cutting device

Abstract

A high ground stress tunneling unloading cutting device comprises a cutting part connected to a rotating shaft. The cutting part is in a bullet shape. A plurality of pickaxe-shaped cutting teeth are arranged on the periphery of the cutting part. A first impact head and second impact heads are arranged in the cutting part, the first impact head extends in the axial direction of the cutting part, the outer end of the first impact head stretches out of the bullet top of the cutting part, the outer ends of the second impact heads stretch out of the peripheral surface of the cutting part, the inner end of the first impact head is connected to a first piston rod of a first hydraulic cylinder, the inner ends of the second impact heads are connected to second piston rods of second hydraulic cylinders, and the first hydraulic cylinder and the second hydraulic cylinders are connected to an oil inlet path in the rotating shaft through a three-position two-way reversing valve. Under control of the first hydraulic cylinder and the second hydraulic cylinder, the impact heads can impact front-end coal rock and side coal rock respectively, the coal rock can be impacted and unloaded in advance when the cutting part enters the coal rock longitudinally and cuts the coal rock transversely, and thus abrasion to the pickaxe-shaped cutting teeth in the coal rock cutting process can be greatly relieved.

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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