Abrasive jet flow coal mining machine with maximum mining height capable of being increased

Abstract

The invention discloses an abrasive jet flow coal mining machine with the maximum mining height capable of being increased. The abrasive jet flow coal mining machine comprises an abrasive jet generator, a power box, a console and a hydraulic pump station which are sequentially installed in a machine body, the two sides of the machine body are each provided with a height adjusting oil cylinder anda cutting arm, each cutting arm is connected with a piston rod of the height adjusting oil cylinder on the same side with the cutting arm, the height adjusting oil cylinders communicate with a hydraulic pump station, and the abrasive jet generator communicates with a first high-pressure nozzle and a second high-pressure nozzle on the cutting arms on the two sides through high-pressure hoses. Whenthe coal mining machine travels on a scraper in a reciprocating manner, a roller of the coal mining machine breaks down the coal rock, high-speed abrasive jet flow is formed at the first nozzle and the second nozzle, the ejected high-pressure abrasive jet flow can cut out two sections on the coal rock, the formed lower section enables the coal rock to be suspended, and the suspended coal rock canfreely fall down under the effects of coal bed energy storage release, mining disturbance and dead weight. The abrasive jet flow coal mining machine is large in coal seam mining thickness, high in adaptability, high in rock breaking capacity and small in generated dust amount.

Description

technical field [0001] The invention relates to an abrasive jet coal shearer whose maximum mining height can be increased. Without changing the diameter of the drum, the characteristics of the strong rock-breaking ability of the abrasive jet are fully utilized, so that the coal rock is cut and suspended, so that the coal seam Free fall under energy storage release, mining disturbance and its own gravity, suitable for rapid mining of complex coal seams such as coal seam thickness is uncertain. Background technique [0002] The energy industry is the basic industry of the national economy, and it is also a technology-intensive industry. "Safety, high efficiency, low carbon" embodies the characteristics of modern energy technology, and is also the main direction to seize the commanding heights of future energy technology. In 2015, the "BP World Energy Statistical Yearbook" pointed out that China is still the world's largest energy consumer, accounting for 23% of global consump...

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Problems solved by technology

[0003] At present, coal mining is mainly based on mechanical cutting of coal rocks. This mining method is difficult to mine effectively when encountering high coal seam coal rocks. It has poor adaptability to mining coal seam thickness and is not suitable for mining irregular coal seams. The work will cause serious wear and tear of the mining mechanism, and the amount of dust in the working flour is large, which makes it difficult to effectively improve the efficiency of coal and rock mining. Moreover, when cutting for a long time or encountering hard rock during the cutting process, it is easy to increase the temperature or generate sparks to cause gas Explosion, with immeasurable consequences

High-pressure water jet rock breaking is a rock breaking technology that uses high-energy "water arrows" to impact and break, erode and wedge. It has been used in oil drilling, mining and rock breaking projects, but the current water jet application is mainly Used as an aid for mechanical rock breaking, its structure is complex, the operation process is cumbersome, and the ability of pure water jet rock breaking is limited, which seriously restricts the rapid mining of coal and rock

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