Publisher's Synopsis
Excerpt from Subsidence Resulting From Mining
The subject of the subsidence of the earth's crust as a result of underground excavation due to mining has attracted widespread attention for some years past, but particularly during recent years. With the extension of mining and the increased value of the surface above the mines in many localities, the growth of towns in mining regions, and the extension of railroads over mining properties, the subject is one that will be of increasing interest as time goes on, not alone to those engaged in mining coal and ores, but to the railroads, municipalities, and other owners and users of the surface that may be affected by mining opera tions. That the subject is not one of mere local interest is shown by the widespread distribution of surface subsidence as described in the follow ing pages. This bulletin has been prepared not with a View of bringing forward any new theories in regard to the subject, but it is in the nature of a reconnoissance and a statement of present knowledge of the subject, based upon the literature available up to the present time. It and a com panion preliminary Cooperation bulletin on subsidence in Illinois by Dr. Young, which will be issued by the Illinois Geological Survey, are intended as studies upon which to base a detailed cooperative investiga tion of subsidence conditions in Illinois. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
