定向爆破预裂和柔模混凝土墙技术在成庄煤矿的协同应用  

Collaborative application of directional blasting presplitting and flexible formwork concrete wall technologies in Chengzhuang Coal Mine

作　　者：司晓鹏 周昌台 SI Xiaopeng;ZHOU Changtai(Jinneng Holding Coal Group Jincheng Coal Division Chengzhuang Coal Mine,Jincheng 048000,China;Institute of Deep Earth Sciences&Green Energy,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]晋能控股煤业集团晋城煤炭事业部成庄矿,山西晋城048000 [2]深圳大学深地科学与绿色能源研究院,广东深圳518060

出　　处：《煤矿安全》2022年第12期92-100,共9页Safety in Coal Mines

摘　　要：为了从根本上提升煤炭资源的回收率,成庄煤矿在5309大采高工作面机巷开展并实施了沿空留巷技术。针对6 m厚煤层、顶板含有硬厚岩层等复杂条件,采用理论分析和现场试验等方法,着重讨论了定向爆破预裂和柔模混凝土技术在“厚煤层、硬顶板”开采工作面的运用。研究结果表明,沿空留巷巷道在滞后工作面10~90 m范围变形较快;沿空留巷在工作面后50~100 m范围的墙体压力最大;爆破预裂切顶卸压和柔模混凝土墙的协同运用,在降低沿空留巷顶板周期来压影响的同时,增强了巷帮的承载能力,从而明显地提高了巷道整体的稳定性和可靠性。In order to improve the recovery rate of coal resources in general,Chengzhuang Coal Mine has carried out and implemented the technology of gob-side entry retaining in 5309 large height mining face.In view of the complex conditions such as 6 m thick coal seam and hard thick rock stratum in the roof,the application of directional blasting presplitting and flexible formwork concrete technology in the mining face of“thick coal seam and hard roof”is emphatically discussed by means of theoretical analysis and field test.The results show that the deformation of gob side entry retaining roadway develops rapidly within10-90 m behind the working face;the wall pressure of gob-side entry retaining reaches the maximum within 50-100 m behind the working face;the cooperative application of blasting presplitting,roof cutting and pressure relief and flexible formwork concrete wall not only reduces the influence of periodic pressure on the roof of the roadway reserved along the goaf,but also enhances the bearing capacity of the roadway side,which obviously improves the overall stability and reliability of the roadway.

关 键 词：沿空留巷 大采高 定向预裂爆破 切顶卸压 柔模混凝土 

分 类 号：TD353[矿业工程—矿井建设] TD327