An Abrasive Jet Shearer with Increased Maximum Mining Height

Abstract

The invention discloses an abrasive jet coal shearer whose maximum mining height can be increased. High oil cylinder and a cutting arm, the cutting arm is connected with the piston rod of the height adjustment oil cylinder on the same side, the height adjustment oil cylinder is connected with the hydraulic pump station, and the abrasive jet generator is respectively connected to the cutting arms on both sides through the high pressure hose. The high-pressure nozzle I and the high-pressure nozzle II are connected. When the shearer reciprocates on the scraper machine, the shearer drum breaks the coal and rock, and forms a high-speed abrasive jet at the nozzle I and nozzle II. The high-pressure abrasive jet will cut two sections on the coal rock. The lower section of the coal seam makes the coal rock suspended in the air, and the suspended coal rock will fall freely under the action of the energy storage release of the coal seam, mining disturbance and self-weight. The abrasive jet shearer of the present invention has the advantages of large coal seam thickness, strong adaptability, strong rock breaking ability and less dust generated.

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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