跨采工作面下部巷道的冲击危险性评价及防治  

Rock Burst Hazard Evaluation and Prevention of Lower Roadway of Cross Mining Working Face

作　　者：季成[1,2] 孔令海[1,2] 王寅[1,2] 边戈 

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]陕西长武亭南煤业有限公司,陕西长武713602

出　　处：《煤矿开采》2017年第1期84-87,共4页Coal Mining Technology

基　　金：国家自然科学基金项目(51304117)

摘　　要：以亭南煤矿207工作面跨采泄水巷冲击危险性为研究对象,利用数值模拟和理论分析的方法,从围岩的应力值、变形量和弹性应变能3个方面对泄水巷的冲击危险性进行分析,并采用人工爆破的方法对泄水巷进行解危。研究结果表明:工作面在跨采泄水巷期间超前采动应力峰值维持在35MPa左右,工作面距离泄水巷10~20m时,泄水巷左右两帮围岩变形量最大值为60mm,煤体积聚的弹性应变能达到冲击所需的最小能量值108.03k J/m^3,将泄水巷评价为严重冲击危险区域,泄水巷采用人工爆破解危后,回采过程中避免了泄水巷发生冲击地压,为类似跨采巷道条件下的冲击地压防治提供相应参考。The paper takes rock burst hazard of water drain roadway influenced by overhead mining of 207 working face of Tingnan coal mine, according numerical simulation and theory analysis , the hazard were analyzed from surrounding rock strain value, deformation and elastic strain energy, then artificial explosion was applied. The research results showed that the ahead mining stress peak value was 35 MPa during water drain roadway influenced by working face mining, the maximal deformation of two sides of water drain roadway was 60mm, when the distance working face to water drain roadway was 10- 20m, the minimum energy value that elastic strain energy accumulate in coal body reached rock burst was 108. 03kJ/m^3, and water drain roadway was determined as seriously rock burst zone, after artificial explosion was applied, rock burst would be avoided during mining process, it references for similar situation .

关 键 词：跨采巷道 冲击地压 弹性应变能 围岩位移 

分 类 号：TD324.2[矿业工程—矿井建设]