Hydraulic and earth engineering – Miscellaneous
Patent
1980-02-13
1982-09-28
Taylor, Dennis L.
Hydraulic and earth engineering
Miscellaneous
405260, 405288, 173 22, E21D 1100
Patent
active
043516254
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an apparatus for automatic bolting in rock reinforcement operations, the apparatus comprising a drill, an injector and a bolting machine.
Prior art apparatuses of the above-mentioned type work with separate supply assemblies for each working phase, that is to say, drilling, injecting and bolting and tightening. Moreover, different bolt lengths may not optionally be utilised without replacement of the supply assemblies. The three separate supply assemblies are mounted on a common shaft which, during the working phase, is brought into abutment against the rock face. This prior art apparatus possesses certain disadvantages. The supply assemblies are of great weight which entails that movability of the apparatus is restricted such that but a few bolt insertion operations can be effected at one and the same machine positioning. Accuracy in the change of working phase is very poor and the equipment requires heavy vehicles and, thereby, also large diesel engines, which entails a dangerous increase in the exhaust gas discharge from the rock chamber. Furthermore, the distance between the apparatus and its point of operation on the rock face is short, which, from the point of view of safety, is disadvantageous.
The object of the present invention is to realise, while avoiding the above-mentioned disadvantages, an apparatus for automatic bolting in rock reinforcement operations, the apparatus being simple and reliable in its construction and function.
A further object of the present invention is to realise an apparatus which may be incorporated in existing drilling and bolting assemblies for rock chambers.
The objects are achieved according to the invention in that the apparatus comprises a supply beam, a machine carriage which is movable along the supply beam, a linear machine shifter switch by means of which the drill and the bolting machine are movable on the machine carriage and which is shiftably disposed along and lockable on the supply beam for different bolt lengths, a working position adjustment device which has sockets for accommodating a drill bit and the forward end of the hose of an injector, a bolt and a positioning rod fixedly disposed at the forward end of the supply beam, the rod being brought into abutment against the rock face in order to direct, by means of the apparatus, in sequence, the bit, the hose and the bolt at a point on the rock face for the purposes of accomplishing the contemplated rock reinforcement operation.
Thus, the present invention provides an apparatus of low weight which, consequently, has a broad range of movement and may carry out a great number of bolting operations at one and the same machine positioning. Furthermore, the apparatus displays great accuracy in change of working phase. Finally, the distance between the machine and the point of operation is considerably greater than in prior art apparatuses.
Because the equipment according to the invention is light in weight, it is possible to use light vehicles with small diesel engines. Furthermore, because the linear machine shifter switch is mounted on a machine carrier which may be moved along the supply beam, it is a simple operation to preset any optional bolt length for the rock face in question.
The nature of the present invention will be more readily understood from the following brief description of the accompanying drawings, which show one preferred embodiment, and discussion relating thereto.
FIG. 1 shows a bolting assembly with an apparatus according to the invention, the solid lines of the drawing showing the apparatus in the lowered position and the broken lines showing the apparatus in a substantially vertical position;
FIG. 2 is a plan view of the apparatus; and
FIG. 3 is a cross-section taken along the line 3--3 in FIG. 2.
FIG. 1 shows an apparatus 1 according to the invention for automatic bolting in rock reinforcement operations. The apparatus 1 is mounted on a vehicle 2 in which the operator sits protected during the entire rock reinforcement operations. The apparatus 1 com
REFERENCES:
patent: 2738081 (1956-03-01), Lee
patent: 3218893 (1965-11-01), Madison et al.
patent: 4226559 (1980-10-01), Prebensen
patent: 4229124 (1980-10-01), Frey et al.
Forssell Ake
Selestam Berndt
Winnersjo Per A.
Linden-Alimak AB
Taylor Dennis L.
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