松软破碎煤巷两帮深孔卸压注浆支护技术数值分析  

Numerical Analysis of Deep Hole Pressure Relief Grouting Support Technology in Two- side of Soft and Fractured Coal Roadway

作　　者：李蒙奇 张盛[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000

出　　处：《煤矿安全》2016年第2期204-207,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51374091)

摘　　要：以松散破碎煤层回采巷道为背景,借鉴岩土工程中的"土钉墙"地基支护机理,提出两帮深孔卸压注浆支护技术。理论分析表明:松软煤层巷道两帮极限平衡区范围较大,现有的锚杆锚索支护方式难以保证巷道的稳定。在煤巷两帮一定范围内注浆能够再造承载层,提高两帮煤体的强度。通过数值模拟对巷道围岩注浆前后的极限平衡区、位移量和应力分布进行对比分析表明,松软破碎煤体两帮深孔注浆可以再造承载层,有效地控制巷道变形,提高巷道的整体稳定性。Based on the background of mining roadway in loose broken coal seam, and referred to the supporting mechanism of the soil nailing wall in geotechnical engineering, the two sides deep hole grouting reinforcement technology is proposed. The theoretical analysis shows that the limit equilibrium zone of the soft coal seam roadway is larger, and it is difficult to guarantee the stability of the roadway by the usual bolt anchor cable supporting method. The strength of the two sides of coal body can be improved through the deep grouting technology to rebuild the bearing layer in a certain range. By numerical simulation, the limit equilibrium zone, displacement and stress distribution of the surrounding rock of the roadway are compared and analyzed. It is proven that grouting technology can rebuild the bearing layer, and the side limit equilibrium zone of coal can be controled and the overall stability of the roadway can be improved.

关 键 词：松软破碎煤巷 两帮深孔卸压注浆支护 再造承载层 极限平衡区 

分 类 号：TD353[矿业工程—矿井建设]