Numerical Study on the Effects of Roof Lithologic Characteristics on Coal Bursting Potential
(0) Bursting potential of coal is the inherent attribute and necessary condition to induce a rockburst. There are many factors that can influence coal bursting potential，but roof lithologic characteristics are the intrinsic controlling factors. During coal mining, roof lithologic characteristics have an important action on the distributions of stress field, displacement field and energy field in coal bed and its surrounding rock. Based on the field data of 5＃ coal and its surrounding rock of 3652 working face in Tangshan colliery, distributions of stress field, behaviors of deformation-failure and variation of elastic strain energy in coal bed and its surrounding rock were modeled and analyzed under different lithologic characteristics of roof by using numerical modeling software of FLAC3D (Three Dimensional Fast Lagrangian Analysis of Continua). It aims to systematically study the effects of roof lithologic characteristics on distribution of stress field and variation of energy field, and to profoundly discuss the controlling action of Youngs modulus of roof on coal bursting potential. Results show that Youngs modulus of roof has an obvious influence on the distribution of stress field and energy field in coal bed and its surrounding rock. With the increasing of Young modulus of roof (the strengthening of rock lithologic characteristics), there are higher stress and elastic strain energy concentrating front of working face, which improves the bursting potential of coal bed during coal mining.
Lithologic characteristics Bursting potential Numerical study Elastic strain energy Youngs modulus
PAN Jienan ZHANG Ruilin QI Yong-an
School of Resource Environment, Henan Polytechnic University, Jiaozuo 454000, Henan, China;Key Labor School of Safety Science & Technology, Henan Polytechnic University, Jiaozuo 454000, Henan, China School of Resource Environment, Henan Polytechnic University, Jiaozuo 454000, Henan, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
472-478
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）