Boring or penetrating the earth – With below-ground personal accommodation
Patent
1989-09-12
1990-10-02
Neuder, William P.
Boring or penetrating the earth
With below-ground personal accommodation
175 53, E21B 4100
Patent
active
049601750
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement in an assembly for raise mining or the like, said assembly including a drive support carrying a drive means for driving the drive support along a guide carrying the same, said guide being attached to the drift wall and being successively lengthened as drift driving proceeds, said drive support carrying at least one drill rig intended for mechanized drilling, and an operator's and service platform.
When introduced, the now well known raise lift implied a considerable progress within the technique of driving long raises and upwardly inclined tunnels. The work is carried through from a platform, which is carried by and drivable along a guide attached to the drift wall and being successively lengthened concurrently with the drift driving. The platform serves both as a working platform and as transport lift. The work is started from a horizontally extending service drift, to the roof of which the first guide sections are attached, and the driving is thereafter carried through successively upwardly from it, curved guide sections being then provided at the transition. The work is carried through in a number of cycles including the following working steps:
(1) Drilling a number of loading holes upwardly in the top roof of the raise.
(2) Loading these holes.
(3) Blasting. Before blasting the raise lift is driven down for protection in the service drift.
(4) Ventilation. Carbon monoxide, nitrogenous gases and fine dust originating from the blasting, is removed by spraying a mixture of water and air from the top of the guide.
(5) The assembly is driven up to the newly blasted area, where so called scaling is done and a new guide section is mounted.
The above described technique implied considerable improvements from the efficiency and security point of view. The drift driving could thus be done considerably faster than what had been possible earlier, and the working environment and security for the working staff was increased.
Due to the continuously increasing demand for further improved efficiency and working environment further developments of the raise lift have been suggested, i.e. striving towards the introduction of drill boom rigs for mechanised drilling for replacing the manually operated drill machines used hitherto. Besides obvious advantages such as faster drilling and shorter time between the drill holes, the use of such drill rigs implies that the inner ends of the drill holes with great precision can be located in essentially the same plane, which minimizes the required scaling work. Of course, this also contributes to decreasing the physical strain on the working staff. Another working environment improving factor is that the obvious risk for the occurrence of cronical injuries due to transmitted vibrations from the manually operated drill machines is eliminated. Furthermore a greater uniformity with respect to efficiency is secured, since the choice of drill steel length, or of change from a shorter drill steel to a longer one in one and the same drill hole is no longer affected by the will, skill or physical ability of the operator.
Despite the above advantages raise lifts with mechanized drill equipment have been used to a very little extent thus far due to economical and constructive reasons. The drill equipment, being also expensive per se, requires expensive reinforcements of the guides and the frame portions of the raise lift carrying the drill equipment and the operator's platform, a fact that has, thus far, not been possible to be compensated for, by use to the full extent of the inherent advantage of a drill boom rig to be able to work with coarser and longer drill steels. More particularly this has been prevented by the fact that the height dimension of the drill equipment is limited by the necessary minimum distance of the operator's platform from the drift top roof for enabling supplementary works, such as scaling. Attempts thus far to solve this problem have not been successful.
The object of the present invention is to provide an arrangeme
REFERENCES:
patent: 4527640 (1985-07-01), Sainio
Alimak AB
Neuder William P.
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