强烈动压巷道支护技术探讨  

Supporting Technology of Roadway Influenced by Strong Mining Pressure

作　　者：张占涛[1] 

机构地区：[1]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》2015年第3期60-64,共5页Coal Mining Technology

基　　金：国家科技支撑计划课题(2012BAB13B02);天地科技公司研发项目(KJ-2013-TDKC-05);天地科技开采设计事业部生产力转化项目(KCSJ-SCLZH-2012-01)

摘　　要：针对强烈动压巷道支护问题,采用理论分析与现场试验相结合的方法,分析研究了受动压影响煤柱内支承压力分布特征及其内部巷道围岩变形特征,通过对实验点的生产地质条件调查和地质力学测试和评估,发现在煤柱内掘进巷道会造成巷道围岩塑性区加大,顶板和巷道两帮出现大量的离层和裂隙,煤体胶结程度差,完整性低,巷道在掘进期间有害变形量较大,影响巷道整体支护效果,容易出现冒顶片帮等事故。提出采用强力锚杆支护系统配合高强度托板和金属网的方式进行支护。以王台铺煤矿15号煤XV13102副巷为例,介绍了强力锚杆支护系统的方案设计、现场试验和矿压监测。研究结果表明,强力锚杆支护系统改善了巷道受力状态,提高了支护系统的承载能力和完整性,达到了预期支护效果,保证了巷道的正常使用。Applying theoretical analysis and site test , abutment pressure distribution and deformation characteristic of coal-pillar influ-enced by mining pressure was analyzed .By geological survey and mechanics test , it was found that driving in coal pillar would make plastic zone of surrounding rock increase , large separation and amounts of fissures occurred , coal cementation and integration degree was low, harmful deformation was large and influenced whole supporting effect and was easily resulted into coal -wall slide and roof fall.It was put forward that applying powerful anchored-bolt supporting system cooperated by high-strength tray and metal mesh to sup-porting.Taking XV13102 auxiliary roadway in 15th coalseam of Wangtaipu Colliery as an example , projection design of powerful an-chored-bolt supporting system , site test and underground pressure observation was introduced .Results showed that the supporting sys-tem improved stress state of roadway and improved carrying capacity and integration of supporting system , which reached expectant supporting effect.

关 键 词：强烈动压 煤柱 地质力学测试 强力锚杆支护 

分 类 号：TD353[矿业工程—矿井建设]