采矿与安全工程学报2017，Vol.34Issue(4)：723-729,7.DOI:10.13545/j.cnki.jmse.2017.04.017
顶板全垮落法短壁连采煤柱合理宽度研究
The reasonable width of coal pillars in the short-wall continuous mining with full roof falling
摘要
Abstract
In view of the short-wall continuous mining in bound coal recovery, in order to solve the problem of key strata large-area instability caused by chain damage of remaining pillar, based on the analysis of two fracture movement forms of key strata, and with the control of large-area fracture movement of key strata as the principle, the "bound coal recovery technology of short-wall continuous mining with full roof falling " was put forward: barrier pillar are to be set between the first and second block section to keep the pillar stable during the mining of the first block section; the full fracture movement of the key strata caused by the coal pillar damage and instability during the mining of the second block section helps realize the coordination and coupling between the damage of pillar and the fracture movement of the key strata; the complete cancelation of barrier coal pillars in the subsequent blocks section realizes the continuity of the roof movement and settlement. The length of first block section should be less than the initial fracture step in the key strata to prevent the critical and unstable state of the plastic hinged lines of key strata. From the perspective of elastic and plastic partition of iso-lated coal pillar, the width of plastic partition and the critical width of middle elastic area of the coal pillar to keep stable were analysed, and the width criterion of isolated coal pillar was establish.关键词
边角煤/短壁连采/顶板全垮落法/首块段长度/煤柱宽度Key words
bound coal/short-wall continuous mining/full roof falling/the length of first block section/size of coal pillar分类
矿业与冶金引用本文复制引用
张开智,王树立,蒋金泉,潘瑞凯,姬松涛..顶板全垮落法短壁连采煤柱合理宽度研究[J].采矿与安全工程学报,2017,34(4):723-729,7.基金项目
国家自然科学基金项目(51564004,51374139,51574155) （51564004,51374139,51574155）
山东省自然科学基金项目(ZR2013EEM018) （ZR2013EEM018）
贵州省科技厅、贵州理工学院联合基金项目([2014]7370) （[2014]7370）
