Directional cracking device for coal mines

Abstract

The invention relates to a directional cracking device for coal mines, which comprises two strip-shaped cambered bottom supporting plates fastened with each other oppositely, at least one pair of horizontal hydraulic cylinders are arranged between the two bottom supporting plates, the roots of the pair of hydraulic cylinders are connected, push rods are symmetrically articulated with the tail end of the piston rod of each hydraulic cylinder, the other ends of the push rods are respectively articulated with the inner surfaces of the strip-shaped cambered bottom supporting plates, an oil inlet tube of each hydraulic cylinder is communicated with an oil inlet main, and an oil outlet tube of each hydraulic cylinder is communicated with an oil outlet main. By utilizing a plurality of small hydraulic cylinders as pushing power, the directional cracking device applies expanding pressure on the sidewall of a coal bed borehole by means of the bottom plate on one end of each hydraulic cylinder and the pushing plate or top plate on the other end of each hydraulic cylinder, so that cracks can be produced in the bore hole to facilitate further mining. The directional cracking device is highly convenient to operate, and greatly increases the working efficiency and the mining efficiency. The directional cracking device is safe and reliable, and cannot pollute and destroy the working environment.

Description

technical field [0001] The invention relates to an auxiliary tool for coal mine development, in particular to a directional fracturing device for coal mines. Background technique [0002] In the current coal mining process, it is necessary to drill holes in the coal seam with a drilling tool, then use a high-pressure water gun to draw water into the hole, and use the pressure of the high-pressure water gun to crack the hole wall in the drill hole for further mining. There are many disadvantages in this method. First, the sealing problem after the high-pressure water gun is inserted into the drill hole cannot be solved well. It takes very tedious fixing work to securely seal the high-pressure water gun to the orifice. There are still two common problems in this way. One is that it takes a long time to seal and fix, which affects the mining progress, and the other is that the sealed and fixed structure is still not firm, and the water gun often breaks away after the water pres...

AI Technical Summary

Problems solved by technology

There are many disadvantages in this method. First, the sealing problem after the high-pressure water gun is inserted into the drill hole cannot be solved well. It needs very tedious fixing work to firmly seal and fix the high-pressure water gun on the orifice. There are still two common problems in this way. One is that it takes a long time to seal and fix, which affects the mining progress, and the other is that the sealed and fixed structure is still not firm, and the water gun often breaks away after the water pressure increases, causing the drill hole to be destroyed and re-drilled. Even cause the coal seam around the borehole to outburst

Another disadvantage of using high-pressure water guns is that it will inevitably cause problems such as water accumulation in the mining environment, which will affect further mining work.

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