Large-scale laboratory drag cutter experiments in hard rock

  • 18 Pages
  • 2.95 MB
  • English
U.S. Dept. of the Interior, Bureau of Mines , [Avondale, Md.]
Drag bits (Drilling and boring) -- Testing, Mining machinery, Rock mech
Statementby R.J. Morrell, D.A. Larson, and D.E. Swanson
SeriesReport of investigations / Bureau of Mines -- 9003, Report of investigations (United States. Bureau of Mines) -- 9003
ContributionsLarson, David A, Swanson, David E
The Physical Object
Pagination18 p. :
ID Numbers
Open LibraryOL16098081M

Additional Physical Format: Online version: Morrell, Roger J. Large-scale laboratory drag cutter experiments in hard rock. [Avondale, Md.]: U.S. Dept. of the. Get this from a library. Large-scale laboratory drag cutter experiments in hard rock. [Roger J Morrell; David A Larson; David E Swanson].

The Bureau of Mines conducted a series of laboratory experiments to test a cutting technique for hard rock using large-scale drag cutters. Cutting experiments were performed on rocks ranging in compressive strength f to 27, lb/in2, using large drag cutters from 3 to 6 in.

In width. The tests were conducted on a special test apparatus, called a ripper tester, which made a curvilinear cut. Additional Physical Format: Online version: Anderson, Sterling J. Laboratory comparison of drag cutting methods in hard rock.

Pittsburgh, Pa.: U.S. Dept. of the. Large-scale laboratory drag cutter experiments in hard rock / By Roger J. Morrell, David E. Swanson and David A. Larson. Abstract. Topics: Rock mechanics., Drag bits (Drilling and boring).

Large-scale laboratory drag cutter experiments in hard rock Roger J Morrell Large-scale laboratory drag cutter experiments in hard rock Roger J. Morrell Not in Library. 2 books Sterling J.

Anderson, 1 book J.

Description Large-scale laboratory drag cutter experiments in hard rock PDF

Geier, 1 book Wallace W. Roepke, 1 book David A. Larson, 1 book. A fundamental limitation on the use of machines for hard rock excavation is cutting tool wear. The development of cutting tools with extended tool life will have a major impact on the economic.

pulling of the bit. Steady state testing of early drag bits (Appl) and PDC cutters (Langveld, ) showed that both cutters and bits should last much longer than had been observed in the field.

The difficulty of obtaining long bit life in hard rock was discussed by Feenstra () where temperature. A series of field tests sponsored by Sandia National Laboratories has simultaneously demonstrated the hard- rock drilling performance of different industry-supplied drag bits as well as Sandia’s new Diagnostics-While- Drilling (DWD) system, which features a novel downhole tool that monitors dynamic conditions in close proximity to the bit.

nificantly the forces acting on a drag bit cutting in hard rock nay lead to a more widespread use of this cheap efficient tool in hard rock applications. In addition, it is possible that water jets could be use.l to assist other methods of rockbreaking, for example disc cutters on various types of boring machines.

Cutter Laboratories was a family-owned pharmaceutical company located in Berkeley, California, founded by Edward Ahern Cutter in Cutter's early products included anthrax vaccine, hog cholera (swine fever) virus, and anti-hog cholera serum—and eventually a hog cholera vaccine.

The hog cholera vaccine was the first tissue culture vaccine, human or veterinary, ever produced. DOI: /S(01) Corpus ID: Experimental investigation on the breakage of hard rock by the PDC cutters with combined action modes @inproceedings{LiExperimentalIO, title={Experimental investigation on the breakage of hard rock by the PDC cutters with combined action modes}, author={X.

Li and D. Summers and Guadalupe Rupert and Px Santi}, year={} }. The bit of experiment is plotted as Fig (b), it is a coring bit made up of three cutters.

(a) XY-2B drilling rig (b)Model of a PDC Bit Fig.1ExperimentalEquipment Fig.2Cutters Cutting Rock Fig.3 Level diagram of PDC Cutters and Rock Wang Jiajun et al. Fig. 10 shows the laboratory apparatus used to perform the cutting experiments with both conventional disc cutters and the ODC.

Detailed laboratory experiments have now been completed cutting in four different rock types: sandstone, UCS=35 MPa; marble, UCS= MPa; granite, UCS= MPa; and norite, UCS= MPa.

The results are consistent.

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Int. Rock Mech. Mining Sci. Vol. 1, pp. Pergamon Press Printed in Great Britain. A LABORATORY INVESTIGATION OF ROCK CUTTING USING LARGE PICKS J.

BARKER Mining Research Establishment, N.C.B., lsleworth, Middlesex (Received 4 March ) Abstract--An account is given of an investigation of the efficiency of large slow-moving picks taking deep cuts in rock. Undercutting discs are disk shape cutters that are used like drag tools to undercut rocks.

When actuated, the disc cutter is also dynamically activated while being dragged across the rock surface. cutting tools like tunnel borers and longwall Experimental Procedure shearers. In these cutting and drilling machines, The laboratory drag-cutting experiments were the cutters are rigidly fixed to a cutterhead, which conducted on a heavy duty, 5 H.P., vertical drill rotates at a designed speed.

Rock cutting by drag picks involves complex mechanical processes which are hard to be represented with conventional strength tests. The most accurate method for rock cuttability assessment is to. The volume of rock generated and the cut length for each cut were calculated based on the geometry of the test bed and the position of the cutter as it entered the rock block.

Materials. Indiana and Kasota limestones were selected for these drag cutter tests because they could be effectively cut by the kerf-core and conventional cutting techniques.

Mechanical Hard Rock Mining. Mechanisation of mining operations has been of interest for decades to improve productivity and reduce cost. However, in hard rock mining applications, this has been impeded by the limitations of the existing mechanical rock fragmentation capabilities, being constrained power, limited strength of mechanical components and short cutter life.

The Bureau of Mines conducted drag cutting experiments in an effort to develop a method of preweakening the rock ahead of the kerf cutters in order to reduce high cutting loads and wear rates.

Get this from a library. Toward development of a hard-rock mining machine--drag cutter experiments in hard abrasive rocks. [Roger J Morrell; Richard J Wilson].

Details Large-scale laboratory drag cutter experiments in hard rock EPUB

Large-scale laboratory drag cutter experiments in hard rock. Report of Investigations no. Hard rock cutting and the development of a. Cutting oil for Barranca, Lortone and other brand Rock saws.

$ Saw Cutting Oil. Never run a diamond cutting blade dry as it can immediately damage your blade. Coolant oil should be kept clean and below degrees F.

Sludge should be removed periodically and replaced with fresh coolant oil so your cuts will be clean and your blades will. Rock cutting or rock scratching can be described as the shaving or machining of a layer of rock from a free surface with the tool moving parallel to the free surface.

The first cutting models were inspired from the metal cutting model presented by Merchant in Merchant, a, Merchant, b.

Merchant's semi-empirical model was based on a Mohr. Introduction Laboratory rock cutting experiments, which may also be called micro-scale experiments [1], can provide the basic data for choosing and designing the most efficient cutting sys- tem.

For this reason there are many advan- tages to finding a relationship between rock properties and rock cutting efficiency. Description: "The Bureau of Mines conducted drag cutting experiments in hard, abrasive rock in an effort to extend the capabilities of an experimental kerf-core mining machine.

The basic kerf-core mining machine cannot be used in hard, abrasive rocks because of. Introduction -- 2. Rock cutting theories -- 3. Possible wear mechanisms at the wear-flat of rock cutting tools -- 4.

Wear mode hypothesis -- 5. Rock cutting tests to study wear -- 6. Rock properties with respect to wear -- 7. Experiments -- 8. Chisels used in the experiments -- 9. Properties of rock types used in the experiments -- core trimmer and cut-off machine for rock samples D/A Detail of spindle with clamping mechanism and cutting blade D/2 Detail of spindle fit with double-faced diamond cup wheel D/3, during surface grinding of cylindrical specimens ends.

Description: "This is the second in a series of Bureau of Mines reports that describe experiments designed to devise an efficient, economic mechanical fragmentation technique for hard rock.

The previous study described the development of the ripper cutting technique to successfully cut hard rock with 3- to 6-in-wide drag cutters. The methods tested were the conventional drag cutting method used on continuous miners, the kerf-core method used on some boring machines, and an experimental method called ripper cutting.

All three methods were tested in blocks of Indiana and Kasota limestone. Issues in Polycrystalline Diamond Compact Cutter–Rock Interaction From a Metal Machining Point of View—Part II: Bit Performance and Rock Cutting Mechanics Effects of Design and Processing Parameters on Performance of PDC Drag Cutters for Hard-Rock Drilling,” Trans.

- Geotherm. A Study of Brittle Rock Fracture in Laboratory. In-house experimental facilities include the hard-rock drilling facility (HRDF) and the linear cutter test facility (LCTF). The HRDF is a laboratory-scale drill rig that allows evaluations of cutter wear and dynamic loads in a realistic drilling environment with controllable operational parameters that include rotational rate, weight on bit, rate of penetration and drill string stiffness.