Изложены закономерности процесса дробления, выявлен-ные в результате производственных экспериментов и теоретических исследований. Представлено математическое описание процесса дробления, решены задачи оптимизации режимов работы дробильного оборудования. Обосновано применение регулируемого привода дробилки для повышения эффективности её работы. Представлены динамическая модель, алгоритм управления и система автоматического управления трехстадийным дробильным комплексом.
Книга предназначена для студентов и аспирантов горных вузов, а также инженерно-технических работников, занимающихся проектированием и эксплуатацией дробильного оборудования.

Glaciotectonism is an important component of modern glacial theory, but it gained widespread recognition only within the past 25 years. Glacial theory began to develop in the late 18th  and early 19th centuries in the Alps of western Europe and the mountains of southern Scandinavia.

The Earth is a dynamic planet that has changed contin- uously during its 4.6 billion years of existence. The size, shape, and geographic distribution of the continents and ocean basins have changed through time, as have the atmosphere and biota. Over the past 20 years, bold new theories and discoveries concerning the Earth's origin and how it works have sparked a renewed interest in geology. We have become increasingly aware of how fragile our planet is and, more importantly, how inter- dependent all of its various systems are. We have learned
that we cannot continually pollute our environment and that our natural resources are limited and, in most cases, nonrenewable. Furthermore, we are coming to realize how central geology is to our everyday lives. For these and other reasons, geology is one of the most important college or university courses a student can take. <...>

A oportunidade de realizar esta tradujo surgiu através de contato de Alfred Kroner com Umberto Giuseppe Cordani para avaliar o interesse em publicar este manual no Brasil. Cordani considerou-o urna contribuÍ9áo significativa para a comunidade geológica nacional e solicitou a mim e a Wilson Teixeira que nos encarregássemos da tradu9áo.

Our natural, environmental home on planet Earth is a complex system of interacting components that includes climate and the atmosphere, organisms and their communities, water, landforms, and soils. The ways we choose to use and affect the environment today can benefit or endanger our own as well as future generations. More than ever before, people today want and need to know the effects of their actions on the environment at both a local and global scale.

Boron is a widespread constituent of crustal rocks, being found in sedimentary, volcanic, plutonic and metamorphic environments. The Earth's upper continental crust  (average of 15 ppm B, 27th in abundance) is highly enriched in boron relative to the primitive mantle, which is inferred to have had 0.6 ppm B prior to creation of the crust (Taylor and McLennan, 1985; 1995;