Analysis of Mining Effect and Fault Stability Under the Influence of Normal Faults
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Analysis of Mining Effect and Fault Stability Under the Influence of Normal Faults Quansen Wu . Quanlin Wu . Anying Yuan . Yongning Wu
Received: 16 February 2020 / Accepted: 31 May 2020 Ó Springer Nature Switzerland AG 2020
Abstract Dynamic disasters often occur in coal mining process, while mining disasters near faults are more serious and complex. Faults are distorted by mining, which releases a lot of energy and easily induces dynamic disasters such as rockburst and roadway instability. This study takes the 10,416 working face of Yang Liu Coal Mine (YLCM) as the engineering background, and uses numerical simulation to study the dynamic response characteristics of the working face advancing towards the hanging wall of the normal fault. In addition, the influence law of normal fault dip on fault stability is discussed in this study. The results show that when the working face of the hanging wall is mined and the working face is Q. Wu Q. Wu (&) Jining University, Jining 273100, People’s Republic of China e-mail: [email protected] Q. Wu Yankuang Group Limited Company, Zoucheng 273500, People’s Republic of China A. Yuan State Key Laboratory of Mining-Induced Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, People’s Republic of China Y. Wu State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, People’s Republic of China
30 m away from the fault, the abutment pressure in the middle of the face reaches the maximum. When the width of the fault coal pillar is 20–30 m, the possibility of rock burst on the working face is the greatest. The static load type impact ground pressure is more likely to occur when the hanging wall face advances. The greater the dip angle of fault, the higher the possibility of fault activation. High dip faults are more likely to induce dynamic disasters such as rock burst, mine earthquake, bracket pressure and so on. The research results of this study provide a scientific basis for the division, prediction and prevention of rock burst dangerous zone in mining face under similar geological conditions. Keywords Normal fault Rockburst Fault stability Fault dip
1 Introduction Coal is the main energy source in the world and plays an irreplaceable role in the development of the economy and the world (Sellers and Klerck 2000; Wang et al. 2020). With the rapid development of the economy, coal demand and production capacity continue to increase, and mine geological conditions are becoming more and more complicated (Wu et al. 2018a, b; Lu et al. 2016; Jiang et al. 2019). In most areas of China, the geological conditions of mines are
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Geotech Geol Eng
complex and the geological structure is well developed. Many mines have entered mining areas with complex structures. In underground geological structures, faults are the most common structures, which have a significant
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