Height of fractured zone inside overlying strata under high-intensity mining in China

作     者：Wenbing Guo Gaobo Zhao Gaozhong Lou Shuren Wang 

作者机构：School of Energy Science and EngineeringHenan Polytechnic University Coal Production Safety Collaborative Innovation Center in Henan ProvinceHenan Polytechnic University International Joint Research Laboratory for Underground Space Development and Disaster Prevention of Henan ProvinceHenan Polytechnic University 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2019年第29卷第1期

页      面：45-49页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (No.51774111) Henan province science and technology innovation outstanding talent fund of China (No.184200510003) 

主　　题：High-intensity mining Overburden failure Height of fractured zone Overlying strata movement 

摘      要：The height of fractured zone(HFZ) at the high-intensity longwall mining panel plays a vital role in the safety analysis of coal mining under bodies of water. This paper described definitions of the highintensity mining. The processes of overburden failure transfer(OFT) were analyzed, which were divided into the development stage and the termination stage. Through theoretical analysis, the limited suspension-distance and the limited overhanging distance were proposed to judge the damage of each stratum. Mechanical models of strata suspended integrity and overhanging stability were established.A theoretical method to predict the HFZ at the high-intensity longwall mining panel was put forward based on the processes of OFT. Taking a high-intensity longwall mining panel(No. 11915 panel) as an example, the theoretical method proposed, the engineering analogy and the empirical formulas in the Regulation were used to predict the HFZ. The results show that the theoretical result is consistent with the engineering analogies result and empirical formulas result. The rationality and reliability of the theoretical method proposed is verified.