Double telescopic hydraulic flexible shield support frame and method

Abstract

The invention relates to a double telescopic hydraulic flexible shield support frame and method. The support frame comprises an upper pushing plate, a shied beam, a first jack, a second jack, a lowersupport plate, threading holes and a steel wire rope. The upper pushing plate, the shied beam and the lower support plate are connected sequentially end to end through hinges. The first jack and the second jack are movably installed between the upper pushing plate and the shield beam as well as between the shield beam and the lower support plate correspondingly. The threading holes are welded to the upper pushing plate, the shield beam and the lower support plate. The steel wire rope can penetrate through the threading holes to connect a plurality of support frames, so that the support framesform a rigid whole. The method has the advantages of high support strength and high flexibility. The angle of the support frame can be adjusted according to the angles of different coal seams, installation and disassembly are convenient, and adaptability is wide.

Description

technical field [0001] The invention belongs to the technical field of coal seam mining, and in particular relates to a double telescopic hydraulic flexible shielding support and a method. Background technique [0002] The reserves of steeply inclined or high-dip coal seams are relatively high in my country, accounting for about 15% to 20% of the country's total coal reserves. Compared with the gently sloping coal seam, the geological condition of the steeply sloping coal seam is poor. With the deepening of mining, the roof will suddenly sink or even collapse, which is easy to cause a large area of ​​overhanging roof in the rear goaf, resulting in air leakage and air leakage in the gob. Gas gathering, etc. And in the process of collapse, the air pressure increases instantaneously, which causes the rapid increase of rock burst pressure, which damages the stability of surrounding rock and coal seam, and poses a serious threat to the safety of machinery, equipment and personne...

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Problems solved by technology

Traditionally, the support for coal seams generally adopts two forms of pit wood support or single pillar support, but these two support methods have defects such as high labor intensity, low support strength, poor safety conditions, and low labor efficiency.

In recent years, with the improvement of coal mining technology, fully mechanized mining and high-grade coal mining methods have also been adopted in the mining of steeply inclined coal seams. However, due to the characteristics of steeply inclined coal seams, these coal mining methods have many problems in practical application, such as high cost and low mining efficiency. low, labor intensive

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