CAJ | 학술논문

巷间煤柱合理宽度的确定是确保大采高双巷布置工作面安全回采的关键。以亭南矿二盘区204大采高工作面双巷掘进运输顺槽和瓦斯抽放巷之间的煤柱为工程背景，首先通过现场应力监测的方法对巷间煤柱受双巷掘进及2次采动过程中的破坏规律进行了系统的研究，得出一次采动影响后靠近采空区侧煤柱的破坏区域宽度约为3 m；上位岩层低应力区域宽度约为18 m；一次采动后煤柱应力分布曲线呈不对称形态；二次采动影响后煤柱应力分布曲线呈不对称“马鞍状”，巷间煤柱边缘累计破碎宽度略大于9 m；同时对2次采动影响后煤柱的破坏区域进行了划分，初步确定巷间煤柱优化范围在5.2～13.0 m之间。其次采用数值模拟的方法分别研究了2次采动影响下宽度为4，6，8，10，12 m的5种不同尺寸巷间煤柱的应力演化规律、弹塑性区域变化规律和巷道变形规律，同时综合考虑安全生产、资源回收率等因素，最终确定大采高双巷布置工作面巷间煤柱的合理尺寸为10 m。最后通过工程实践验证了巷间煤柱留设的合理性。该研究结果可以为类似开采条件下巷间煤柱的留设提供参考。
항간매주합리관도적학정시학보대채고쌍항포치공작면안전회채적관건。이정남광이반구204대채고공작면쌍항굴진운수순조화와사추방항지간적매주위공정배경，수선통과현장응력감측적방법대항간매주수쌍항굴진급2차채동과정중적파배규률진행료계통적연구，득출일차채동영향후고근채공구측매주적파배구역관도약위3 m；상위암층저응력구역관도약위18 m；일차채동후매주응력분포곡선정불대칭형태；이차채동영향후매주응력분포곡선정불대칭“마안상”，항간매주변연루계파쇄관도략대우9 m；동시대2차채동영향후매주적파배구역진행료화분，초보학정항간매주우화범위재5.2～13.0 m지간。기차채용수치모의적방법분별연구료2차채동영향하관도위4，6，8，10，12 m적5충불동척촌항간매주적응력연화규률、탄소성구역변화규률화항도변형규률，동시종합고필안전생산、자원회수솔등인소，최종학정대채고쌍항포치공작면항간매주적합리척촌위10 m。최후통과공정실천험증료항간매주류설적합이성。해연구결과가이위유사개채조건하항간매주적류설제공삼고。
Determination of the reasonable width of pillars between roadways is the key for ensuring safety production of large mining height face with double roadways layout. Taking the double tunneling pillar between haulage gate and gas drainage roadway of 204 large mining height face in the second panel of Tingnan Coal Mine as the engineering background,firstly,the failure regularity of pillar between roadways under the effect of double tunneling and two times mining was systematically studied by using the method of field stress monitoring. A 3 m wide of fractured zone near the gob was found,and a 18 m wide low stress zone was realized. The distribution curve of stress in pillar between roadways after the first mining was asymmetric. After the second mining, distribution curve of stress in pillar between roadways was like a asymmetric“saddle”and the cumulative broken at the edge of pillar was more than 9 m. at the same time,the division of pillar between roadways was given after the two times mining,and the reasonable width of pillar between roadways was determined preliminarily to be 5.2—13.0 m. Secondly,the stress evolution law,the elastic-plastic region variation,and the roadways deformation law of 5 different coal pillar that width of 4 m,6 m,8 m,10 m and 12 m were studied by numerical simulation. Various elements such as safety production and resources recovery were considered comprehensively. The reasonable width of double tunneling pillar between roadways in large mining height face was 10m. Finally,the reasonableness of the pillar width was verified by engineering practice. The results can provide a reference for the setting of pillar between roadways with similar mining conditions.