BIENIAWSKI 1989 PDF

RMR Rock Mass Rating , or also known as the geo mechanics classification has been modified and made as the International Standard in determination of rock mass weighting. Rock Mass Rating Classification has been developed by Bieniawski since , , and The goals of this research are investigate the class of rocks base on classification rock mass rating Bieniawski , to investigate the long mass of the establishment rocks, and also to investigate the distance of the opening tunnel without a support especially in underground mine. On the research measuring: strength intact rock material, RQD Rock Quality Designation , spacing of discontinuities, condition of discontinuities, groundwater, and also adjustment for discontinuity orientations. On testing samples in the laboratory for coal obtained strong press UCS of Based on the classification according to Bieniawski has a weight of 4.

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RMR Rock Mass Rating , or also known as the geo mechanics classification has been modified and made as the International Standard in determination of rock mass weighting. Rock Mass Rating Classification has been developed by Bieniawski since , , and The goals of this research are investigate the class of rocks base on classification rock mass rating Bieniawski , to investigate the long mass of the establishment rocks, and also to investigate the distance of the opening tunnel without a support especially in underground mine.

On the research measuring: strength intact rock material, RQD Rock Quality Designation , spacing of discontinuities, condition of discontinuities, groundwater, and also adjustment for discontinuity orientations. On testing samples in the laboratory for coal obtained strong press UCS of Based on the classification according to Bieniawski has a weight of 4. As for silt stone obtained strong press of From the results of the measurements obtained for coal RQD value average While in siltstone RQD value average On the coal the average distance measured in field is That is located in the range 0.

Roughness condition in coal and siltstone classified into rough so it has weight 5. Infilling condition in coal and siltstone classified into none so it has weight 6. Weathering condition in coal and siltstone classified into highly weathered so it has weight 1. Groundwater condition in coal classified into dripping so it has weight 4. Discontinuity orientation in coal parallel axis of the tunnel.

In siltstone also discontinuity parallel axis of the tunnel. Base on weighting parameters according to Bieniawski , concluded for rocks are there in class II with value is 62, and able to establishment until 6 months. For the distance of the opening tunnel without a support as far as 8 meters. Enable full ADS. Similar Papers. Volume Content.

Export Citation. Abstract RMR Rock Mass Rating , or also known as the geo mechanics classification has been modified and made as the International Standard in determination of rock mass weighting.

BOY SANDWICH BERYL GILROY PDF

Rock mass rating

We'd like to understand how you use our websites in order to improve them. Register your interest. The results of geotechnical explorations, engineering geological investigation including laboratory and in situ tests and field observations have been used, along with borehole logging charts, to obtain the rock mass geotechnical data. A new series of correlations were established between the systems based on the data collected from the study area.

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The rock mass rating RMR is a geomechanical classification system for rocks , developed by Z. Bieniawski between and Recently RMR14 [2] has been proposed to improve the RMR performance by incorporating new experiences from tunnel practices. Each of the six parameters is assigned a value corresponding to the characteristics of the rock. These values are derived from field surveys and laboratory tests. The sum of the six parameters is the "RMR value", which lies between 0 and

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