Interrelationship of In-situ Rock Properties, Excavation Method, and Muck Characteristics
Abstract
Reports results of research to correlate the properties of in-situ rocks with materials handling properties of muck and parameters of excavation systems. Goals are to develop methods for predicting muck characteristics from collected data and for selection of transport equipment through the Muck Designation Number concept. Muck sample, rock, and operating data collection, testing methods, data processing, development of MDN's, preliminary regression analysis, and equipment selection are described. Data available from 50 samples at 23 sites (16 samples from 8 sites in 1972) is presented in raw data printout and narrative-graphic summary form, showing lithology, rock properties, operating data, and muck properties. Tentative MDN's are described by composite size and distribution curves, with preliminary regression analyses of 27 data sets and prediction accuracies of over 90 percent. Applications to equipment selection/design include input for design formulae used in mathematical models of belt and hydraulic conveying systems. DOD implications include more rational transport equipment selection and design, with resultant speed and cost benefits. Recommended additional research includes sampling operations and formations not previously available, resampling to improve the confidence level of the data, dynamic testing for coefficients of rock strength in addition to current tests, and predictor refinements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1972
- Accession Number
- AD0751058
Entities
People
- H. C. Pattison
- H. F. Haller
- O. C. Baldonado