Shear fork telescopic type surface drilling water jet coal mining nozzle device and use method

Abstract

The invention discloses a shear fork telescopic type surface drilling water jet coal mining nozzle device and a using method. The shear fork telescopic type surface drilling water jet coal mining nozzle device comprises a barrel-shaped cover shell fixedly installed at the bottom of a high-pressure conveying pipe, a radial telescopic arm arranged in the barrel-shaped cover shell and a nozzle assembly installed at the outer side end of the radial telescopic arm; the radial telescopic arm is of a shear fork type telescopic structure and comprises an inner installation frame, a shear fork type telescopic assembly and an outer installation frame, a sliding block lifting driving mechanism capable of driving a first sliding block of the inner installation frame to slide up and down along a first lifting guide mechanism of the inner installation frame is further arranged in the barrel-shaped cover shell, and when the first sliding block of the inner installation frame is located at the upper limit position or the lower limit position of the first lifting guide mechanism of the inner installation frame, the shear fork type telescopic assembly completely retracts into the barrel-shaped cover shell. According to the shear fork telescopic type surface drilling water jet coal mining nozzle device, the effective spraying distance of the nozzle can be effectively increased, the coal mining area range of a single ground drilling well can be greatly increased on the premise of not increasing the construction cost of surface drilling, the coal mining efficiency is improved, and the mining cost is reduced.

Description

technical field [0001] The invention relates to a water-jet coal mining nozzle device and its use method, in particular to a scissor telescopic ground drilling water-jet mining nozzle for hydraulic coal mining in near-horizontal coal seams that are easy to protrude underground and have high safety risks. A coal sprinkler device and a use method belong to the technical field of coal mining. Background technique [0002] Energy is the cornerstone of the development of human society and an irreplaceable basic industry. my country is "lack of gas, less oil, and relatively rich in coal resources." The Chinese Academy of Engineering predicts that the proportion of coal in primary energy consumption will remain at about 50% in 2050. Therefore, Coal will still dominate my country's primary energy consumption for a long time to come. However, the disadvantages of traditional underground coal mining are becoming more and more prominent. On the one hand, with the exhaustion of shallow ...

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Problems solved by technology

The water jet coal mining nozzle device is an important part of the ground drilling hydraulic mining technology. It determines the mining range of a single well and can greatly affect the economy and efficiency of drilling hydraulic mining. The coal mining range of the water jet coal mining nozzle device is mainly affected by However, even if the water pressure is increased as much as possible and the structure of the nozzle is optimized, the impact force generated by the water jet will gradually attenuate with the increase of the spray distance. Therefore, the conventional ground drilling The actual coal mining area is relatively small, usually within a radius of 2 to 5m. For the "chicken nest coal" with a large distribution area, more ground drilling is usually required, resulting in an increase in mining costs and a decrease in coal mining efficiency. , affecting its application and promotion

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