恒大煤矿1366综放工作面回采巷道围岩注浆技术研究  

Research on grouting technology of surrounding rock in mining roadway of No.1366 fully-mechanized caving face in Hengda Coal Mine

作　　者：孙兴发 SUN Xingfa(Hengda Coal Mine,Fuxin Mining(Group)Co.,Ltd.,Fuxin 123000,China)

机构地区：[1]阜新矿业(集团)有限责任公司恒大煤矿,辽宁阜新123000

出　　处：《煤炭科技》2024年第4期178-185,共8页Coal Science & Technology Magazine

基　　金：国家自然科学基金资助项目(51774165)。

摘　　要：针对恒大煤矿1366综放工作面回采巷道在掘进过程中围岩破碎、变形量大、成形率低的问题,研究了巷道围岩全断面注浆改性的关键技术,并确定了一种控制巷道变形的围岩注浆改性方法。研究结果表明,选用水泥与多功能复合水泥基改性材料作为注浆材料,通过一系列注浆材料配比实验,设计了巷道围岩注浆加固方案,并计算得出了注浆材料的配比和注浆工艺。利用Comsol软件对不同注浆压力条件下注浆扩散范围进行了详细研究,计算结果显示在注浆压力为8 MPa时,浆液能够更容易从注浆孔扩散至周边注浆孔形成完整结构。通过现场工业实验和矿压观测表明,采用注浆方法能够有效地加固围岩,特别是对底板的加固效果显著,该方法可应用于破碎的围岩控制,有助于保持巷道的稳定。In response to the problems of rock fragmentation,large deformation,and low formation rate during the excavation process of the No.1366 fully-mechanized mining face in Hengda Coal Mine,key technologies for full-section grouting modification of the surrounding rock in the roadway was investigated.A method for modifying the surrounding rock through grouting was identified to control the deformation of the roadway.The research results indicated the cement and multifunctional composite cement-based modification materials were selected as grouting materials.Through a series of experiments on grouting material ratios,a grouting reinforcement scheme for the surrounding rock of the roadway was designed,and the material ratios and grouting process were calculated.Using Comsol software,the diffusion range of grouting under different grouting pressures was carefully studied.The results showed that at a grouting pressure of 8 MPa,the slurry could more easily diffuse from the grouting hole to form a complete structure around the surrounding grouting holes.Field industrial experiments and mining pressure observations demonstrated the effective reinforcement of the surrounding rock through grouting,particularly with significant reinforcement effects on the roadway floor.This method is applicable to controlling fragmented surrounding rock,contributing to the stability of the roadway.

关 键 词：注浆材料 围岩控制 巷道支护 

分 类 号：TD265.4[矿业工程—矿井建设]