Effect of strata properties and panel widths on chock performance

作     者：Manoj Khanal Deepak Adhikary Rao Balusu 

作者机构：Earth Science and Resource Engineering Commonwealth Scientific and Industrial Research Organization (CSIRO) ClaytonVIC 3169Australia Queensland Center for Advanced Technology Commonwealth Scientific and Industrial Research Organization(CSIRO)Pullenvale QLD 4069Australia 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2011年第3卷第S1期

页      面：407-414页

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：chock capacity longwall simulation underground mining 

摘      要：The selection of optimum chock (support) capacity is very crucial for a successful longwall mining. The selection of chock capacity depends on the site-specific geotechnical parameters, constraints and longwall panel geometry, which are generally not known in detail in priority. Hence, based on the field and laboratory data, various possible combinations should be analyzed to cater for the unforeseeable mining conditions. This paper discusses the use of numerical model for selecting an appropriate chock capacity based on the site-specific geological and geotechnical information and longwall panel geometry. The fracture mechanisms of immediate and main roofs are also discussed for various panel widths and support capacities. For the models considered, the chock convergence is predicted to increase by about 33% due to the increase in face width from 100 to 260 m. Similarly, the massive roof strata are found to yield higher chock convergence compared to bedded strata.