摘要
为确定厚煤层煤柱合理宽度问题,通过理论分析得出基本顶断裂线位置,采用数值模拟对比分析常规综放开采和错层位外错式采煤法下沿空巷道周围垂直应力分布规律。同时,在支护形式上对比错层位外错式和以往巷道单一支护。综合考虑采用错层外错式布置方式且相邻巷道错距确定为1 m,"锚网喷+锚索"联合支护下上区段沿顶巷道实体煤帮和接续面沿空掘巷顶板在横纵向对沿空巷道顶煤形成支撑作用。错层位外错式采煤法确定沿空掘巷新形式,为减弱上覆岩层对巷道围岩应力有重要作用。
In order to determine the reasonable width of coal pillar in thick coal seam, the position of the basic roof fracture line is obtained through theoretical analysis. The distribution of vertical stress around the roadway along the conventional fully mechanized sublevel caving mining and the mining method of external-misaligned stagger arrangement are analyzed by numerical simulation. At the same time, we compare the single support of the former roadway with the external-misaligned staggered arrangement from supporting forms. Finally, external-misaligned stagger arrangement is used and the offset distance of adjacent roadways is determined to be 1 m. The support of the top coal in the roadway along goaf has been given by ＂bolt net spray ＋anchor cable＂under the combined support of the upper coal roadway along the roof and the continuous face of the roadway along goaf. This method of coal mining determines the new form of roadway driving along goaf, and plays an important role in weakening the overburden rock to the roadway surrounding rock stress.
作者
王志强
石磊
孙中文
李宁
蒲宇泽
崔冬雪
WANG Zhiqiang;SHI Lei;SUN Zhongwen;LI Ning;PU Yuze;CUI Dongxue(School of Resources and Sofety Engineering,China University of Mining and Technology（Beijing;Research Center of Top Coal Caving Mining in Coal Mining Industry,Beijing 100083,China)
出处
《煤矿安全》
CAS
北大核心
2018年第8期48-52,共5页
Safety in Coal Mines
基金
国家自然科学基金面上资助项目(51774289)
国家自然科学基金青年基金资助项目(51404270)
中央高校基本科研业务费专项资金资助项目(2011QZ06)
关键词
厚煤层
错层位
外错式
联合支护
煤柱
沿空巷道
围岩控制
thick coal seam
stagger arrangement
external-misaligned
combined support
coal pillar
gob-side entry
surroundingrock control
