深部大采高充填开采沿空留巷围岩控制机理及应用  

Surrounding rock control mechanism and its application of gob-side retaining entry in deep backfilling with large mining height

作　　者：谢生荣[1] 张广超[1] 何尚森[1] 孙运江[1] 李二鹏[1] 杨绿刚[2] 谢国强[3] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]冀中能源股份有限公司,河北邢台054001 [3]冀中能源股份有限公司邢东煤矿,河北邢台054021

出　　处：《煤炭学报》2014年第12期2362-2368,共7页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(51234005);中央高校基本科研业务费专项资金资助项目(2010QZ06)

摘　　要：针对深部大采高充填开采沿空留巷支护系统损毁等矿压现象,提出了高水材料充填体性能优化、锚杆索强力联合支护和钢管混凝土组合支架的综合控制技术,并阐明其作用机制。综合多种方法研究分析不同配比方案条件下的充填体力学性能和矿压规律,得出C2组配比材料充填能较快形成稳定平衡大结构;提出降低实体煤帮高度和采用高强锚杆索形成点线面结合的支护结构体系,保障关键支承点实体煤帮稳定,以及高预应力高强锚杆索和桁架锚索系统保障留巷顶板小结构完整;研制的圆钢管混凝土组合支架具有承载能力高、抗弯性能强、塑性与韧性好以及一定让压能力和抗侧压能力等优越性,能适应深部留巷顶板大变形和提升充填体围岩支护性能。现场实践表明,采用综合控制新技术后,无明显周期来压现象,支护系统未发生弯曲损毁现象,充填体侧顶底板移近量达490 mm,实现了深部大采高沿空留巷围岩的有效控制。Based on the mining pressure phenomena,such as support system damage,that occurred in gob-side retaining entries of deep backfilling with large mining height,an integrated control technology consisting of high-water material filling body performance optimization,collaborative support system with powerful anchor and cable and combined steel-concrete brackets was put forward,and its mechanism was discussed. By means of different research methods,the mechanical performance of filling body,abutment pressure and mining pressure law were investigated with different material ratio programs. The research results show that group C2 is more favor to form an integral stability balance structure of retaining entry in time. Besides,the combined point-line-surface support system composed of lower coal side height and high-strength anchor（ cable） was proposed to guarantee the coal side stability that was the key support point to roof. Also,the collaborative support system with high pre-stressed and strength anchor（ cable） and truss cablewas put forward to guarantee the integrity of the local structure. Furthermore,the combined brackets developed not only had advantages such as high load capacity,outstanding bending performance and plastic and toughness,but had some yield-pressure and anti-lateral pressure ability,which adapts the large deformation of deep retaining entry and improves the support performance of coal-side filling body well. With the application of integrated control technology,the field practice show that the obvious periodic mining pressure never occurred and the support system is avoided being bended and damaged. The roof-floor displacement in filling body side is almost 490 mm,which demonstrates an effective control of retaining entry surrounding rock in deep backfilling with large mining height.

关 键 词：充填体改性 强力联合支护 钢管混凝土支架 

分 类 号：TD353[矿业工程—矿井建设]