巷道底板冲击地压卸支耦合防治技术研究  

Research on Coupling Prevention Technology of Rock Burst in Roadway Floor

作　　者：史庆稳 于海湧[1,2] 蓝航[1,2] 

机构地区：[1]煤炭科学研究总院北京开采研究院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《煤矿开采》2016年第1期93-96,共4页Coal Mining Technology

基　　金：国家自然科学基金资助项目(51304116);天地科技技术创新基金项目(KJ-2014-TDKC-05)

摘　　要：通过分析煤矿巷道底板冲击地压的破坏特点及其影响因素,提出基于卸支耦合原理的深孔区间爆破+底板锚注的底板冲击地压防治技术,利用有限差分软件FLAC^(3D)对比分析了底板无支护、底板锚注和深孔区间爆破+底板锚注时的巷道围岩应力分布及变形特征,并通过现场试验论证了深孔区间爆破+底板锚注的卸支耦合防治技术对治理底板冲击地压的可行性。结果显示,深孔区间爆破+底板锚注的卸支耦合防治技术可避免高水平应力导致底板浅部围岩能量集聚,并能有效地控制底板和两帮变形,从而防止煤矿巷道底板冲击地压的发生。By analysis broken characters and influence elements of rock burst in roadway floor,prevention technology that include sectional blasting in deep hole and bolt-grouting of floor rock burst was put forward on the basis of release and supporting coupling theory. Detailed numerical model was conducted with FLAC3 Dto evaluate the characters of surrounding rock stress distributions and deformation in different supporting methods,which include non supporting in floor,bolt-grouting in floor,sectional blasting in deep hole and bolt-grouting in floor. The feasibility of floor rock burst prevention technology was validated by filed test. The results showed that the prevention technology could decreased energy accumulation in shallow position of floor,which induced by high stress,floor heave and two sides convergence could be controlled effectively,and then rock burst in floor would be prevented.

关 键 词：巷道 底板冲击地压 卸支耦合 深孔区间爆破 锚固注浆 

分 类 号：TD324.1[矿业工程—矿井建设]