A device and method for increasing the thickness of a coal seam mined by a shearer by using an abrasive jet

Abstract

The invention discloses a device and method for increasing the thickness of a coal seam mined by a shearer by using an abrasive jet. The device includes a scraper and a double-drum shearer installed on the scraper. The double-drum shearer includes a drum, Cutting arm, height-adjusting cylinder and fuselage, the fuselage is equipped with abrasive jet generator, a cutting arm is connected to both sides of the fuselage, a height-adjusting cylinder is respectively installed on both sides of the fuselage, and the height-adjusting cylinder is connected with it. The cutting arms on the corresponding sides are connected, and a drum is arranged on one side of the end of the cutting arm. Several mechanical picks are arranged on the cylindrical outer wall of the drum. Two high-pressure nozzles II are also arranged on the cylindrical outer wall of the drum. The cutting arm One side of the end is connected to one end of the high-pressure nozzle frame, and the other end of the high-pressure nozzle frame is installed with a high-pressure nozzle I, and the high-pressure nozzle frame rotates relative to the connecting shaft of the cutting arm, and both the high-pressure nozzle I and the high-pressure nozzle II are connected to the abrasive jet generator . The invention has high coal-rock mining height, strong coal-rock crushing ability and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to a device and method for improving the thickness of coal seams mined by a shearer by using abrasive jets, which realizes section cutting of coal rocks, so that coal rocks are automatically broken by utilizing mining disturbances and their own weight. It is suitable for high seam coal rock or coal rock of complex coal seam. Background technique [0002] In 2015, "BP World Energy Statistical Yearbook" pointed out: China is still the world's largest energy consumer, accounting for 23% of global consumption and 61% of global net growth; coal resource consumption accounts for 66.03% of total consumption, and in the future For a long period of time, it has an irreplaceable position as the main energy source in my country. The Outline of the National Medium- and Long-Term Science and Technology Development Plan (2006~2020) clearly pointed out that it is urgent to strength...

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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. The adjustment flexibility for coal seam height is low, and it is not suitable for the mining of irregular coal seams. Time work will lead to serious wear of the mining mechanism, the amount of dust in the working flour is large, it is difficult to effectively improve the efficiency of coal and rock mining, and when cutting for a long time or encountering hard rock during the cutting process, it is easy to increase the temperature or generate sparks. The gas explosion caused 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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