Theory and Method of Automatically Formed Roadway in Underground Mining

This book investigates in detail the theory and method of automatically formed mining roadway (AFR). The AFR method utilizes mining pressure and broken expansion characteristics of the collapsed rock mass in the gob to automatically form roadways, which changes the traditional “long cantilever beam” to “short cantilever beam” structure, and eliminate roadway excavation and coal pillar reserve. Key technologies are developed under the guidance of the “equilibrium mining” theory, such as in situ drilling and zoning technology, roof directional presplitting technology, high prestressed constant-resistance support technology, and gangue blocking support technology. The mining technologies and methods are successfully applied to a large number of coal mines of different geological conditions. The book is intended for both researchers and practitioners working in the mining, civil, and geological engineering fields.

Table of Contents:
Introduction.- Mining Theory of Automatically Formed Roadway (AFR).- AFR Mining Method and Key Technologies.- The AFR with Shallow Buried Depth.- Model Test System of AFR Mining Method.- Design Principle of Key Parameters.- Summary and Prospect of AFR Mining Method.

About the Author :
Qi Wang is a professor and doctoral supervisor. His research focuses on the theory and method of surrounding rock control in underground engineering under complex conditions. He is the vice-president at ISRM Soft Rock Commission, the executive director of Energy and Environment International Unite Laboratory, and the executive director of Key Laboratory for Geo-mechanics and Deep Underground Engineering-Beijing. In recent years, he published 98 papers indexed by SCI or EI as the first or corresponding author, including eight papers with high citations in ESI and six papers with hot topics. He held 85 Chinese invention patents as the first inventor. He was awarded the second prize of China Technological Invention Prize and 11 first prizes at ministerial level. Bei Jiang is an associate professor and doctoral supervisor. Her research focuses on the control of surrounding rocks large deformation under complex conditions. She won Coal Youth Science and Technology Award, Excellent Young Energy Technology Worker, and Young Top-notch Talents in Engineering Construction Technology Innovation. She held 12 national and provincial level projects, including the National Key R&D Program Project, National Natural Science Foundation General Project, Youth Science Foundation, Shandong Province Key R&D Program, etc. In recent years, she published 91 papers indexed by SCI or EI. She held 72 Chinese invention patents and 9 software copyrights. She was awarded 12 first prizes or second prize at ministerial level. Zhenhua Jiang is a doctoral candidate. His research focuses on the control mechanism for surrounding rock of deep mining roadway. He published 13 papers indexed by SCI or EI, including three papers with high citations in ESI and three papers with hot topics. He held eight Chinese invention patents and won two provincial and ministerial first prizes. He participated in three projects of the National Natural Science Foundation and nine projects commissioned by Enterprises and Institutions.