Anti-shear, energy-absorbing, scour-increasing, resistance-increasing anchor cables and coupling anti-scourage method for supporting and unloading couplings in thick top-coal roadway

Abstract

The invention relates to the technical field of rock burst prevention and control, and provides a shear-resistant, energy-absorbing, scour-resistance-increasing anchor cable and a thick-top-coal roadway support and unloading coupling coupling anti-scour method. The anti-shear, energy-absorbing, anti-scorching and resistance-increasing anchor cable includes an energy-absorbing, anti-scorching and resistance-increasing device, an ear-type shear energy-absorbing tube; the ear-type shear energy-absorbing tube includes a second outer sleeve, a second inner sleeve, a metal interlayer , the metal interlayer includes arched bodies connected end to end, and reciprocatingly bent tooth-shaped members are provided at the joints of adjacent arched bodies. In this method, the construction parameters of anchor support and pressure relief are first determined; then the roadway roof anchor construction is carried out; then the large-diameter drilling is carried out for pressure relief construction; Risk area, seismic isolation and disturbance reduction zone; finally, the two sides of the roadway are anchored and pressure-relieved. The present invention can realize the overall energy absorption and anti-shear deformation of the anchor cable, unify the pressure relief measures of active anti-scouring and the anchoring measures of active protection, and realize the combination of anchor support-pressure relief and coupling anti-scouring of roadways with thick top coal.

Description

technical field [0001] The invention relates to the technical field of rock burst prevention and control in coal mine roadways, in particular to a shear-resistant, energy-absorbing, scour-increasing, resistance-increasing anchor cable and a method for coupling support and unloading couplings of thick-roof coal roadways. Background technique [0002] Rock burst is one of the most serious dynamic disasters in coal mines, which seriously threatens the safe production of underground mines. At present, with the increase of coal mining depth and mining intensity in my country, the occurrence frequency and disaster-causing degree of rock burst are increasing significantly. Statistics show that nearly 90% of rock bursts occur in roadways, especially for all-coal roadway excavation in thick coal seam mining. Bottom coal should not be left. If there is bottom coal, special control measures such as bottom plate pre-pressure relief must be taken. In this way, in thick and extra thick c...

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Problems solved by technology

[0005] The above invention patents have achieved creative design in terms of active pressure relief and anti-scour and anti-scourt anchoring support, but there are the following deficiencies: ① The unified design of the pressure relief measures for active anti-scouring and the anchoring measures for active protection have not been realized, so that anchoring cannot be realized Combined and coupled anti-shock function of support and pressure relief

② The energy-absorbing anchor material only considers the large deformation requirements of the anchor rod and anchor cable from the perspective of ideal stretching, and does not consider the shear deformation resistance and shear energy absorption after impact activation; Comprehensive consideration of damage characteristics, roadway roof and floor and other special structures, only the support body itself is considered, which cannot meet the anti-erosion requirements of thick roof coal roadway structures

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