Okay, here is the translation following your instructions: Stope Roof Control and Monitoring Technology

Author: Cen Chuanhong
Publisher:
Publish Date: 2004-02-01
Features: The publication of "Control and Monitoring Technology of Mine Roof" (edition) has been more than five years. During this period, we have conducted in-depth research on the classification of mine roof accidents, the selection and calculation of fully mechanized mining supports, and the estimation of parameters of the main roof. The research results will be introduced in the second edition of this book. Considering that this book will continue to serve as a teaching material for mining professionals in the coming years, and the teaching hours have been reduced; and considering that in the 21st century, support methods such as friction supports, which basically do not meet safety production requirements, should no longer be used in mines; Therefore, in the second edition of this book, content related to mining professional courses has been deleted, such as the physical and mechanical properties of rocks, the performance of hydraulic supports and individual supports; content related to scientific management of mine roof that is not closely related has been deleted, such as the classification of mine roof, the speed of the working face and the roof pressure, the boost coefficient; Content related to friction supports in the selection and calculation of supports and support quality and dynamic monitoring of the roof has been deleted. If someone is interested in the deleted content, they can refer to the edition of this book. Through 20 years of research on mine roof accidents, we have the following basic understandings: , as long as the mine roof is managed scientifically, that is, reasonable roof control design is carried out before the working face is put into operation, and support quality and roof dynamic monitoring are frequently carried out after the working face is put into operation, mine roof accidents can be prevented; second, when selecting and calculating supports, not only should the working resistance of the supports and pillars be noted, but special attention should be paid to the initial support force of the supports and pillars; third, when selecting and calculating supports, one should start from unfavorable conditions; fourth, the working resistance and initial support force of the supports and pillars should have necessary safety margins, and the support force of fully mechanized mining supports should have a greater safety margin than individual supports. The above basic understandings are emphasized in both the edition and the second edition of this book. It is the second edition of this book that highlights the need for a greater safety margin for the support force of fully mechanized mining supports.