摘要
针对高家堡煤矿4号特厚煤层采深大且具有强冲击倾向性,现有支护方案不能满足巷道围岩控制的问题,根据首采工作面支护效果现场实测数据,基于整体耦合让压设计理念,确定锚杆(索)合理支护参数,确定沿空巷道小煤柱合理参数,提出"高强预应力蛇形让压锚杆+鸟窝耦合让压锚索+强力护表构件"联合支护技术,巷道最大顶底板移近量为126mm,移近率3.71%,两帮平均移近量198.3mm,平均移近率3.97%。监测数据表明:支护方案可满足大采深强冲击倾向性巷道控制要求,有效保证了工作面安全生产。
To large mining depth and strengthen impact tendency of No. 4 extra thickness coal seam of Gaojiabu coal mine,roadway surrounding rock control problems could not be met by the now available supporting scheme,according field practical data of the first working face supporting results,based on design concept of total coupling yield design,bolt and cable parameters were confirmed,also small coal pillar parameters of gob-side entry was confirmed,and then combined supporting technology that high pretension snake type yield blot and bird nest coupling yield cable and intensity surface protection components was put forward,the largest convergence from roof to floor was 126 mm,movement ratio was about 3. 71%,and average of two sides was 198. 3 mm,movement ratio was about3. 97%. The monitoring data showed that supporting scheme could meet roadway control demand,and safety production was ensured effectively.
作者
陈海瑞
张金虎
邢鲁义
许永祥
CHEN Hai-rui;ZHANG Jin-hu;XING Lu-yi;XU Yong-xiang(Shaanxi Zhengtong Coal Industry Co.,Ltd.,Xianyang 713600,China;Coal Mining ＆ Designing Department,Tiandi Science ＆ Technology Co.,Ltd.,Beijing 100013,China;Mining Institute,China Coal Research Institute,Beijing 100013,China;School of Mine and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《煤矿开采》
北大核心
2018年第4期50-53,100,共5页
Coal Mining Technology
基金
国家重点研发计划资助项目(2017YFC0804308)
国家自然科学基金资助项目(51704157)
中国煤炭科工集团科技创新创业资金专项青年项目(2018QN018)
关键词
大采深
强冲击倾向性
小煤柱
沿空巷道
large mining depth
strengthen impact tendency
small coal pillar
gob-side entry
