沿空巷道动力显现影响机制与防治技术研究  

Influence mechanism and prevention technology of dynamic manifestation of roadway along goaf

作　　者：韩刚 窦林名[2] 张寅 李旭东 王黔 吕玉磊 HAN Gang;DOU Linming;ZHANG Yin;LI Xudong;WANG Qian;LYU Yulei(China Coal Energy Research Institute Co Ltd,Xi'an,Shaanxi 710054,China;School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;China Coal Rock Burst&Water Hazard Control Center,Ordos,Inner Mongolia 017200,China;School of Mechanics and Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China;China Coal Northwest Onergy Co Ltd,Ordos,Inner Mongolia 017200,China;Wushenqi Mengda Mining Co Ltd,Ordos,Inner Mongolia 017307,China)

机构地区：[1]中煤能源研究院有限责任公司,陕西西安710054 [2]中国矿业大学矿业工程学院,江苏徐州221116 [3]中煤冲击地压与水害防治研究中心,内蒙古鄂尔多斯017200 [4]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [5]中煤西北能源有限公司,内蒙古鄂尔多斯017200 [6]乌审旗蒙大矿业有限责任公司,内蒙古鄂尔多斯017307

出　　处：《采矿与安全工程学报》2021年第4期730-738,748,共10页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51874292,51934007);国家重点研发计划项目(2016YFC0801403)。

摘　　要：围绕鄂尔多斯深部矿井沿空巷道动力显现特点,结合现场实测数据分析沿空巷道覆岩空间破裂与采动应力场关联性及其对动力显现的影响,明确诱冲主因,制定针对性防治措施并进行实践验证。研究结果表明:回风巷近距离沿空侧覆岩破裂产生的动载为沿空巷道动力显现诱冲主因;沿空巷道顶板以上2~6.9 m厚度为4.9 m的粉砂岩层,顶板以上7.7~12.1 m厚度为4.4 m的砂质泥岩层,顶板以上29.2~34.5 m的粉砂岩、细砂岩组,顶板以上45.4 m厚度为8.8 m的细砂岩层为沿空巷道动力显现影响层位。通过基于沿空侧覆岩爆破区域微震分布特征的顶板预裂爆破效果分析,揭示顶板预裂爆破减冲作用机制。顶板预裂爆破实践应用效果证明了致灾因素分析及针对性防治措施的有效性。In view of characteristics of dynamic manifestation in roadways along goaf in deep mines of Ordos and on-site measured data,the correlation between overlying rock space fracture and mining stress field of roadway along goaf and its impact on dynamic manifestations were analyzed,major causes of induced scouring were identified,targeted prevention measures were worked out,and practical verification was carried out.The results have shown that the dynamic load caused by overlying rock fracture in close goaf side of return airway is the main cause of dynamic manifestations in roadway along goaf;The influence layers are 4.9 m-thick sandstone layer 2-6.9 m above roof of the roadway along goaf;4.4 m-thick sandy mudstone layer 7.7-12.1 m above the roof,siltstone and fine sandstone groups 29.2-34.5 m above the roof,and 8.8 m-thick fine sandstone layer 45.4 m above the roof.Through analysis of the effect of roof pre-splitting blasting based on microseismic distribution characteristics of overlying rock blasting area along the goaf,mechanism of roof pre-splitting blasting to reduce the impact was revealed.The field application of roof pre-splitting blasting has proved disaster-causing factor analysis and targeted prevention measures to be effective.

关 键 词：冲击地压 沿空巷道 微震监测 覆岩空间破裂 采动应力场 预裂爆破 

分 类 号：TD326[矿业工程—矿井建设]