基于松动圈测试的回采巷道围岩分类研究  

Study on Classification of Surrounding Rock of Gateway Based on Loose Zone Detecting

作　　者：高林[1] 刘鹏泽 张盼栋 Gao Lin;Liu Pengze;Zhang Pandong(Mining College,Guizhou University,Guizhou,550025)

机构地区：[1]贵州大学矿业学院,贵州550025

出　　处：《当代化工研究》2022年第12期62-64,共3页Modern Chemical Research

基　　金：国家自然科学基金“软弱倾斜沿空半煤岩巷非对称大变形破坏机理及量化表征”(项目编号:52004073);贵州省科技支撑计划项目“掘采扰动沿空半煤岩巷围岩分区裂化破坏机理及协同锚护技术研究与示范”(项目编号:黔科合支撑[2021]一般400)。

摘　　要：为掌握枫香矿区回采巷道围岩类别,采用钻孔探测法对枫香矿区下属A、B、C三对代表性矿井的回采巷道围岩松动圈范围进行测定,并引入修正系数k对测试结果进行折算。现场测试结果表明,同一煤矿回采工作面中与采煤工作面上下端头距离相同处,回风巷松动圈值要比运输巷松动圈值大;同一回采巷道围岩松动圈测试段,距离采煤工作面越近,松动圈值越大;同一测站处,顶板围岩松动圈值一般比两帮围岩松动圈值大;枫香矿区内代表性矿井回采巷道在回采期间围岩松动圈属于中~大松动圈,围岩类别属于Ⅲ(一般围岩)~Ⅳ(一般不稳定围岩)类。研究结果对枫香矿区回采巷道支护方案及参数确定具有重要的指导意义。In order to master the surrounding rock classification of gateway in Fengxiang mining area,the drillholes detection method was used to determine the loose zone range (L_(p)) of surrounding rock of gateways in three representative mines A,B and C which belong to Fengxiang mining area,and the correction coefficient k was introduced to correct the test results.The field test results show that:At the same distance between the working face and the upper and lower end of the working face in the same coal mine,the L_(p)of the tailentry is larger than that of the transportation roadway;In the test section of the surrounding rock loose zone of the same gateway,the closer to the working face,the greater the L_(p);At the same station,the L_(p)of surrounding rock of roof is generally larger than that of two sides;The surrounding rock loose zone of gateways of representative mines in Fengxiang mining area belong to medium-large loose zone during mining,and the category of surrounding rock belongs to Ⅲ (general surrounding rock)-Ⅳ(general unstable surrounding rock).The research results have important guiding significance for determining the supporting scheme and parameter of gateways in Fengxiang mining area.

关 键 词：松动圈 围岩分类 回采巷道 钻孔探测 

分 类 号：TD82[矿业工程—煤矿开采]