![]() ![]() Q- slope is designed such that it suggests stable, maintenance-free bench-face slope angles of, for instance, 40°-45°, 60°-65°, and 80°-85° with respective Q- slope values of approximately 0.1, 1.0, and 10. Through case studies across Asia, Australia, Central America, and Europe, a simple correlation between Q- slope and long-term stable slopes was established. Intended for use in reinforcement-free road or railway cuttings or in opencast mines, Q- slope allows geotechnical engineers to make potential adjustments to slope angles as rock mass conditions become apparent during construction. Q- slope is an empirical rock slope engineering method for assessing the stability of excavated rock slopes in the field. ![]() The Q- Slope Method for Rock Slope Engineering Application of combined slope ratio analysis to the rocks of the Uwekahuna Laccolith, Hawaii, USA, and the lavas of the 1959-summit eruption of Kilauea Volcano, Hawaii, USA, yields results that are consistent with field observations. ![]() The calculated composition can then be subjected to rigorous statistical testing using the linear-subtraction method recently advanced by Woronow (1994). If two stoichiometric substances are mixed and certain chemical components are uniquely contained in either one of the two mixing substances, then by treating these unique components as conserved, the composition of the substance not containing the relevant component can be accurately calculated within the limits allowed by analytical and geological error. ![]() Combined slope ratio analysis and linear-subtraction: An extension of the Pearce ratio methodĪ new technique, called combined slope ratio analysis, has been developed by extending the Pearce element ratio or conserved-denominator method (Pearce, 1968) to its logical conclusions. ![]()
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