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New techniques in blast monitoring and optimisation
131A 854205 Durability assessment of crush rock road base Smith. R B Int ASSOC Engng Geol Bull N29, June 1984. P443-446 (paper
to the hternutional Ma!, 1984)
Symposium on Aggregates, Nice, 21-23
The effectiveness
of three pretreatment processes for Volcanic breccia, repeated compaction, artificial weathering and soaking in water, to simulate material breakdown during construction, was examined. The first treatment was found to be the most realistic, but not a replacement for the wet/dry strength variation procedure currently used.
854206 Preliminarv observations on the design and construction of a four-lane h’igbway through expansive clay in Cyprus Cottiss, G I Q J Engng Geol V17, N3, 1984, P179-192
854207 Comprehensive evaluation of pavement design parameters for Kuwait soils Bindra, S P; Al-Sanad, H A Proc 4th Australia-New Zealand Conference on Geomechanics, Perth, Western Australia, 14-18 May 1984 VI, P78-82. Pub1 Barton: lnst of’ Engineers, 1984 Description of the salient results from a comprehensive study to investigate the part played by subgrade soil materials available in Kuwait. Correlations found between laboratory measured resilient modulus, laboratory measured CBR values, peak shear ratio on a shear box and results from a simple impact hammer test are examined. Results demonstrate the inherent difficulty of predicting the dynamic response from the results of static tests.
Groundwater problems 854208 Simulation for risk analysis with correlated variables Nguyen. VU; Chowdhury. R N Geotechnique V35, Nl. March 1985, P47-58
A Monte Carlo simulation approach for probabilistic modelling of a function of correlated random variables is presented and its use is demonstrated for a problem of water table drawdown near the sloping face of an open strip coal mine. The results based on Monte Carlo simulation are compared with those based on a Taylor series approximation and the Rosenblueth method.
Comminution of Rocks 854210 Handbook on surface drilling and blasting
Finland: Tamrock, 1984, 310P 854211 Selection of decisive technical properties of rocks for the operation of roadheading and winning machines Vasek, J; Janas, P In: Applications of Rock Mechanics to Planning and Design Prior to Mining @aper to the 8th Plenary Scientific Session of the Znternational Bureau of Strata Mechanics, World Mining Congress, Essen, 22-24 June 1983) P149-1.54. Pub1 Rot-
terdam: A. A, Balkema. 1984 The best known and most used methods of rock disintegration are radial and tangential cutting and breakage by indentation or compaction. The rock characteristics which enable the most suitable method to be chosen are defined. These are: (I) cuttability (workability) defined in terms of cutter head geometry and resistance to cutting; (2) abrasivity; (3) degree of strata fissuration; and (4) indentation strength.
Blasting See also: 854244, 854249 854212 New techniques in blast monitoring and optimisation Preston, C J; Tienkamp, NJ CZM Bull V77, N867. Ju1.v 1984, P43-48 The use of pressure and vibration sensors to monitor single borehole blasts in underground and surface mining is outlined. Data from these field measurements. plus data on the thermochemical properties of the explosives, are evaluated by BLASPA, a blast simulation computer program. Blast geometry, explosive loads and distribution, hook-up and costs can be studied. Final output gives specific blast performance for each procedure, results which can be easily compared and which enable the blasting process to be optimised. 854213 Vertical crater retreat mining at the Luossavaara Research Mine Niklasson. B Swedish Detonic Research Foundation report DS 1984.5. I
Notl 1984, l2OP 854209 Galerkin finite-element program for stimulating unsaturated flow in porous media Khaleel, R; Yeh, T C Groundwater V23, Nl, Jan-Feb 1985, PYO-96
A Galerkin
finite element solution of one dimensional unsaturated flow equation is developed using linear basis or shape functions. Material balance error summaries are presented to demonstrate the accuracy of the numerical scheme. Results obtained using this program are compared with other existing numerical solutions.
Report describing the results from tests conducted in a test stope at the Luossavaara Research Mine, Kiruna, Sweden. The project consisted of four main topics: (I) the application of the VCR-method; (2) an analysis of the fragmentation; (3) the
damage assessment to the surrounding rock: and (4) the optimum explosive-hole pattern combination. Three different explosives were used with a variety of hole patterns and their suitability for VCR mining evaluated. It was concluded that the favourable rock structure was a major influence performance of VCR mining in this case. Avail: The Foundation,
Influence of dynamic loads due to explosions or earthquakes
Box 32058. S-126 11 Stockholm,
Sweden
Crushing and grinding See: 854167, 854168. 854189, 854202 See: 854007. 854091
on the good
to the hternutional Ma!, 1984)
Symposium on Aggregates, Nice, 21-23
The effectiveness
of three pretreatment processes for Volcanic breccia, repeated compaction, artificial weathering and soaking in water, to simulate material breakdown during construction, was examined. The first treatment was found to be the most realistic, but not a replacement for the wet/dry strength variation procedure currently used.
854206 Preliminarv observations on the design and construction of a four-lane h’igbway through expansive clay in Cyprus Cottiss, G I Q J Engng Geol V17, N3, 1984, P179-192
854207 Comprehensive evaluation of pavement design parameters for Kuwait soils Bindra, S P; Al-Sanad, H A Proc 4th Australia-New Zealand Conference on Geomechanics, Perth, Western Australia, 14-18 May 1984 VI, P78-82. Pub1 Barton: lnst of’ Engineers, 1984 Description of the salient results from a comprehensive study to investigate the part played by subgrade soil materials available in Kuwait. Correlations found between laboratory measured resilient modulus, laboratory measured CBR values, peak shear ratio on a shear box and results from a simple impact hammer test are examined. Results demonstrate the inherent difficulty of predicting the dynamic response from the results of static tests.
Groundwater problems 854208 Simulation for risk analysis with correlated variables Nguyen. VU; Chowdhury. R N Geotechnique V35, Nl. March 1985, P47-58
A Monte Carlo simulation approach for probabilistic modelling of a function of correlated random variables is presented and its use is demonstrated for a problem of water table drawdown near the sloping face of an open strip coal mine. The results based on Monte Carlo simulation are compared with those based on a Taylor series approximation and the Rosenblueth method.
Comminution of Rocks 854210 Handbook on surface drilling and blasting
Finland: Tamrock, 1984, 310P 854211 Selection of decisive technical properties of rocks for the operation of roadheading and winning machines Vasek, J; Janas, P In: Applications of Rock Mechanics to Planning and Design Prior to Mining @aper to the 8th Plenary Scientific Session of the Znternational Bureau of Strata Mechanics, World Mining Congress, Essen, 22-24 June 1983) P149-1.54. Pub1 Rot-
terdam: A. A, Balkema. 1984 The best known and most used methods of rock disintegration are radial and tangential cutting and breakage by indentation or compaction. The rock characteristics which enable the most suitable method to be chosen are defined. These are: (I) cuttability (workability) defined in terms of cutter head geometry and resistance to cutting; (2) abrasivity; (3) degree of strata fissuration; and (4) indentation strength.
Blasting See also: 854244, 854249 854212 New techniques in blast monitoring and optimisation Preston, C J; Tienkamp, NJ CZM Bull V77, N867. Ju1.v 1984, P43-48 The use of pressure and vibration sensors to monitor single borehole blasts in underground and surface mining is outlined. Data from these field measurements. plus data on the thermochemical properties of the explosives, are evaluated by BLASPA, a blast simulation computer program. Blast geometry, explosive loads and distribution, hook-up and costs can be studied. Final output gives specific blast performance for each procedure, results which can be easily compared and which enable the blasting process to be optimised. 854213 Vertical crater retreat mining at the Luossavaara Research Mine Niklasson. B Swedish Detonic Research Foundation report DS 1984.5. I
Notl 1984, l2OP 854209 Galerkin finite-element program for stimulating unsaturated flow in porous media Khaleel, R; Yeh, T C Groundwater V23, Nl, Jan-Feb 1985, PYO-96
A Galerkin
finite element solution of one dimensional unsaturated flow equation is developed using linear basis or shape functions. Material balance error summaries are presented to demonstrate the accuracy of the numerical scheme. Results obtained using this program are compared with other existing numerical solutions.
Report describing the results from tests conducted in a test stope at the Luossavaara Research Mine, Kiruna, Sweden. The project consisted of four main topics: (I) the application of the VCR-method; (2) an analysis of the fragmentation; (3) the
damage assessment to the surrounding rock: and (4) the optimum explosive-hole pattern combination. Three different explosives were used with a variety of hole patterns and their suitability for VCR mining evaluated. It was concluded that the favourable rock structure was a major influence performance of VCR mining in this case. Avail: The Foundation,
Influence of dynamic loads due to explosions or earthquakes
Box 32058. S-126 11 Stockholm,
Sweden
Crushing and grinding See: 854167, 854168. 854189, 854202 See: 854007. 854091
on the good