Coal mine underground isolated soft rock mass supporting device used in dynamic pressure environment

Abstract

The invention discloses a coal mine underground isolated soft rock mass supporting device used in a dynamic pressure environment and relates to a roadway supporting device. The coal mine underground isolated soft rock mass supporting device used in the dynamic pressure environment solves the problem that isolated soft rock mass and roadways are prone to deformation under the influence of mine pressure. According to the coal mine underground isolated soft rock mass supporting device used in the dynamic pressure environment, an isolated soft-rock roadway supporting device is provided with a first anchor net, a first anchor rod, a first U-shaped shed, a first grouting anchor rod and a first anchor cable, a soft-rock roadway intersection supporting device is provided with a second anchor net, a second anchor rod, a second U-shaped shed, a second grouting anchor rod, a second anchor cable and a second anchor cable beam, and a roadway intersection soft rock mass supporting device is provided with a first anchor net, a first anchor rod, a first U-shaped shed, a first grouting anchor rod, a third anchor cable, an I-beam and a first U-shaped shed. The coal mine underground isolated soft rock mass supporting device used in the dynamic pressure environment is simple in structure, convenient to construct and capable of greatly improving the mining resistance of soft rock mass.

Description

technical field [0001] The invention relates to a roadway supporting device, in particular to an isolated island soft rock mass supporting device under the dynamic pressure environment of a coal mine. Background technique [0002] At present, some coal mines have poor geological conditions, difficult mining techniques, and mining-skip layouts. The working face of the island soft rock mass is affected by the goaf on both sides. Under the combined effects of high ground stress, structural stress, and mining stress , the mine pressure in the two lanes is extremely strong, the rockburst occurs frequently, the support is broken, the roadway deforms quickly, the bottom drum is serious, the maintenance is difficult, and the advancing speed of the working face is seriously slowed down. The traditional shed support can no longer meet the mine pressure. Show strong roadway requirements. [0003] However, after adopting the traditional roadway support technology in the coal mine, the ...

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Problems solved by technology

[0002] At present, some coal mines have poor geological conditions, difficult mining techniques, and mining-skip layouts. The working face of the island soft rock mass is affected by the goaf on both sides. Under the combined effects of high ground stress, structural stress, and mining stress , the mine pressure in the two lanes is extremely strong, the rockburst occurs frequently, the support is broken, the roadway deforms quickly, the bottom drum is serious, the maintenance is difficult, and the advancing speed of the working face is seriously slowed down. The traditional shed support can no longer meet the mine pressure. Show strong roadway requirements

[0003] However, after adopting the traditional roadway support technology in the coal mine, the service life of the roadway around the soft rock mass of the island is as short as two months, and the longest time is no more than two years. The general roadway support technology makes the roadway in the coal mine In use, it is easy to fall into a vicious cycle of repairing the roadway after the deformation of the roadway, re-deformation of the repaired roadway, and repair after re-deformation

On the one hand, the repeated maintenance of the roadway will cause a lot of waste of manpower and material resources, and increase the production cost of the enterprise; on the other hand, it will also seriously affect the production progress of the coal mining enterprise; lead to safety hazards for underground workers

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