墩柱式沿空留巷技术研究  

Research on Pier Column Gob- side Entry Retaining Technology

作　　者：贾民[1] 柏建彪[2] 田涛[1] 徐营[2] 邱亮亮[2] 

机构地区：[1]兖州煤业股份有限公司济宁二号煤矿,山东济宁272072 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭科学技术》2014年第1期18-22,共5页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51204167)

摘　　要：为解决济宁二号煤矿工作面回采距离短、掘进速度慢、采掘接替紧张的难题,通过采用墩柱压力试验、建立力学模型、理论计算及现场试验方法,创新性地提出采用墩柱结构进行沿空留巷。结果表明:墩柱能够满足留巷强度要求,切顶所需压力为21.96 MPa;当钢管内砂石质量配比为1.0∶1.6时,墩柱式沿空留巷效果最好,墩柱既能保持较高强度,又具有良好的可缩性;矿压观测结果显示顶底板移近量最大为596 mm,两帮移近量最大为299 mm,能够保证沿空留巷的稳定性。In order to solve the problem short mining distance, slow driving speed, conflict of exploitation and mining of working face in Ji- ning No.2 Coal Mine,pier column pressure testing, mechanical model,theoretical calculations and field test methods were applied to put forward innovatively pier structure gob-side entry retaining.The results showed that the pier column could meet the strength requirements, the required for cutting the top pressure was 21.96 MPa.When the sand and stones weight ratio in steel pipe was 1.0 ： 1.6,the effect of pier column gob-side entry retainiuy was the best, the pier column not only could maintain a higher strength, but also had good scalability. The rock pressure observation showed that the maximum roof to floor convergence was 596 mm, the maximum rib to rib convergence was 299 mm, which could ensure the stability of gob-side entry retaining.

关 键 词：沿空留巷 墩柱 围岩稳定性 承载力 巷旁支护阻力 

分 类 号：TD322.4[矿业工程—矿井建设]