Device and method for improving thickness of coal seam exploited by coalcutter by using abrasive jet

Abstract

The invention discloses a device and a method for improving the thickness of a coal seam exploited by a coalcutter by using an abrasive jet. The device comprises a scraper and a double drum coalcuttermounted on the scraper. The double drum coalcutter comprises drums, cutting arms, height adjusting oil cylinders and a body. An abrasive jet generator is loaded to the body, the cutting arms are separately connected to two sides of the body, the height adjusting oil cylinders are mounted on two sides of the body separately, the height adjusting oil cylinders are connected to the cutting arms on the corresponding sides, the drums are arranged on one sides of the end parts of the cutting arms, a plurality of mechanical picks are arranged on the cylindrical outer walls of the drums, two high pressure nozzles II are also arranged on the cylindrical outer wall of each drum, one sides of the end parts of the cutting arms are connected to one end of a high pressure nozzle rack, a high pressure nozzle I is mounted at the other end of the high pressure nozzle rack, the high pressure nozzle rack rotates relative to the connecting shafts of the cutting arms, and the high pressure nozzles I and II are connected to the abrasive jet generator. The device is high in coal exploiting height, high in coal crushing ability and high in 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, the 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 streng...

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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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