A double-drill full-hydraulic drill type pressure relief device and pressure relief method

Abstract

The invention discloses full-hydraulic drill type pressure relieving equipment with double drill bits and a pressure relieving method. The full-hydraulic drill type pressure reliving equipment and the pressure relieving method are applicable to tunneling operation on mine roadways with outstanding pressures or coal seam stress concentration. The full-hydraulic drill type pressure reliving equipment comprises a drilling tool assembly, an embracing claw assembly, an obliquity adjusting assembly, a main unit, a cooling assembly, anchor rod assemblies and a hydraulic assembly. The full-hydraulic drill type pressure relieving equipment and the pressure relieving method have the advantages that supporting and fixing effects can be realized by anchor rods, drilling and production angles can be adjusted by the obliquity adjusting assembly, and drilling pipes can be changed over, so that pressure relieving holes can be drilled and can collapse after drilling tools are withdrawn, and coal seam stress can be relieved; the holes can be stably formed and are high in drilled depths, pressures of coal can be sufficiently relieved, and high power phenomena such as large coal blasting during wall caving and coal breaking of the roadways can be eliminated; the contour lines of the roadways and coal and rock outside the roadways are complete and stable after the pressures are relieved, accordingly, the roadway construction cost and the dangerous level can be lowered, and the roadway tunneling efficiency can be improved; the full-hydraulic drill type pressure relieving equipment is hydraulically controlled, and accordingly the labor intensity can be relieved for workers; tunneling equipment such as tunneling machines can conveniently enter the roadways to work in the roadways owing to a narrow body of the full-hydraulic drill type pressure relieving equipment, and the flexibility of drilling machines can be improved by crawler travel units.

Description

technical field [0001] The invention relates to a double-drill full-hydraulic drilling type pressure relief device and a pressure relief method, which are especially suitable for low-gas mines in which stratum stress concentration exists in coal seams during roadway excavation. Background technique [0002] Affected by geographical factors, the coal seams in some parts of the country have relatively large formation stress. During roadway excavation, the concentration of formation stress is likely to cause prominent problems such as coal guns, which threaten the safety of workers and affect work efficiency. At present, domestic equipment to solve the problem of coal seam stress concentration includes hand-held drilling rigs, column drilling rigs, and rack-supported drilling rigs, etc., but these drilling rigs have small drilling diameters, poor hole stability, small drilling depth, and poor Problems such as low efficiency, inconvenient movement, and high labor intensity of wo...

AI Technical Summary

Problems solved by technology

[0002] Affected by geographical factors, the coal seams in some areas of the country have relatively large formation stress. During roadway excavation, the concentration of formation stress is likely to cause prominent problems such as coal guns, which threaten the safety of workers and affect work efficiency.

At present, domestic equipment to solve the problem of coal seam stress concentration includes hand-held drilling rigs, column drilling rigs, and rack-supported drilling rigs, etc., but these drilling rigs have small drilling diameters, poor hole stability, small drilling depth, and poor Problems such as low efficiency, inconvenient movement, and high labor intensity of workers

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