深井窄煤柱沿空掘巷合理掘进时机与控制技术  

Reasonable driving time and control technology for gob-side entry driving of narrow coal pillar in deep wells

作　　者：师鑫 范钢伟[2] 苏博文 高涵 肖延庆 Shi Xin;Fan Gangwei;Su Bowen;Gao Han;Xiao Yanqing(Shaozhai Coal Industry,Shandong Energy Group Xibei Mining Co.,Ltd.,Pingliang 744000,China;School of Mines,China University of Mining and Technology,Xuzhou 221000,China)

机构地区：[1]山东能源西北矿业邵寨煤业,甘肃平凉744000 [2]中国矿业大学矿业工程学院,江苏徐州221000

出　　处：《能源与环保》2024年第12期37-44,共8页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：山西省揭榜招标项目(20201101009);中央高校基本科研基金项目(2021ZDPY0226)。

摘　　要：针对深井窄煤柱沿空掘巷掘进时机无据可依及巷道围岩稳定性控制困难等问题,采用现场实测与理论分析相结合的方法,开展了深井窄煤柱沿空掘巷合理掘进时机与控制技术研究。研究结果表明,基于现场微震监测数据拟合分析,沿空巷道掘进时机为1502工作面回采结束后51 d;同时,建立了1502工作面数值计算模型,监测了1502回风巷帮部垂直应力-时步变化,并与实测垂直应力-时间变化相对应,给出了模型运算时步与现实时间的对应关系,据此得出巷道合理掘进时机为1502工作面回采结束后85 d。综合以上结果,确定1503回风巷掘巷时机为1502工作面回采结束后85 d。针对1503回风巷提出了4种支护方案,分析了不同支护方案下围岩变形、应力分布特征,优选出最佳支护方案为顶板锚杆间排距920 mm×900 mm,顶板锚索间排距1700 mm×900 mm。结果显示,采用该支护方案后,巷道顶底板最大移近量为136 mm,两帮最大移近量为173 mm,巷道支护效果良好。研究成果可有效指导深井窄煤柱沿空掘巷掘进时机确定及巷道围岩稳定性控制。In response to the problems of no reliable driving time for narrow coal pillars along the gob-side entry driving in deep wells and the difficulty in controlling the stability of surrounding rock,a combination of on-site actual measurements and theoretical analysis was used to conduct research on the reasonable driving time and control technology of gob-side entry driving along narrow coal pillars in deep wells.The research results showed that based on the fitting analysis of on-site microseismic monitoring data,the driving time of gob-side entry was 51 days after the end of No.1502 working face mining.At the same time,the numerical calculation model of the No.1502 working face was established,and the change of vertical stress and time step at the side of No.1502 return airway was monitored,corresponding to the change of measured vertical stress and time,and the corresponding relationship between the calculation time step of the model and the real time was given.According to this,the reasonable driving time of the roadway was 85 days after the end of No.1502 working face mining.Based on the above results,it was finally determined that the final driving time of No.1503 return airway was 85 days after the end of No.1502 working face mining.Four supporting schemes were proposed for No.1503 return airway,and the deformation and stress distribution characteristics of surrounding rock under different supporting schemes were analyzed.The optimal supporting scheme was selected as a spacing of 920 mm×900 mm between the roof anchor rods and 1700 mm×900 mm between the roof anchor cables.The results showed that the maximum displacement of roof and floor after adopting this supporting scheme was 136 mm,and the maximum displacement of two sides was 173 mm,and the roadway supporting effect was good.The research results can effectively guide the determination of driving time and control of surrounding rock stability in narrow coal pillars along the gob-side entry driving of deep wells.

关 键 词：深井 沿空巷道 掘进时机 控制技术 

分 类 号：TD322[矿业工程—矿井建设]