摘要
为了对张双楼煤矿74104工作面在正常回采期间冲击地压危险区域采取适当的预处理措施,设计了深孔预裂爆破防治冲击地压的方案。在瓦斯封孔“两堵一注”原理基础上进行改进,研制出适合张双楼煤矿深孔爆破现场使用的封孔囊袋以及封孔工艺。通过试验室材料试验配比的方法,对不同掺量主料、掺量外加剂条件下的封孔材料性能进行试验测试,确定了封孔材料的最终配比及性能参数。试验结果表明,封孔材料浆液配制完成后,0~10 min失去流动性,15~25 min完全固化;(0.5~2.0)∶1水灰比下浆体结石率可达100%;(0.6~1.3)∶1水灰比,结石体30 min强度即可达4.7~6.1 MPa,2 h的强度可达6.4~9.9 MPa。应用效果分析表明,双囊袋式灌浆封孔技术提高了封孔效率与安全性,降低了封孔劳动强度,操作安全简便,为其他具有冲击地压危险性矿井的爆破卸压提供了技术支持。
In order to take appropriate pre-treatment measures in the dangerous area of rock burst during normal mining of 74104 working face in Zhangshuanglou Coal Mine,a scheme of deep hole pre-splitting blasting for preventing rock burst was designed.On the basis of improving the principle of"two plugging and one injection"for gas sealing hole,the sealing bag and the sealing process suitable for deep hole blasting in Zhangshuanglou Coal Mine were developed.Through the laboratory material test ratio method,the sealing material properties under the condition of different dosage of main material and admixture were tested,and the final ratio and performance parameters of the sealing material were determined.The test results showed that the slurry of sealing material loses fluidity in 0~10 min after preparation,and solidified completely in 15~25 min.When the ratio of water cement is(0.5~2.0)∶1,the stone rate of slurry can reach 100%.When the water-cement ratio is(0.6~1.3)∶1,the strength of stone body can reach 4.7~6.1 MPa after 30 min and 6.4~9.9 MPa after 2 hours.The application effect analysis showed that the double-bag grouting sealing technology improves the sealing efficiency and safety,reduces the sealing labor intensity,and is safe and simple to operate.It provides technical support for the blasting pressure relief in other mines with rockburst hazard.
作者
曹远威
徐大连
李兵
刘汉磊
沈礼明
CAO Yuan-wei;XU Da-lian;LI Bing;LIU Han-lei;SHEN Li-ming(Zhangshuanglou Coal Mine,Jiangsu Xuzhou Mining Energy Co.,Ltd.,Xuzhou 221616,China;Jiangsu Coal Mining Rockbust Prevention Engineering Technology Research Center,Xuzhou 221616,China;School of Resources and Earth Sciences,China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤炭科技》
2022年第1期53-59,共7页
Coal Science & Technology Magazine
基金
国家自然科学基金资助项目(51974302)。
关键词
深孔爆破
封孔材料
冲击地压
爆破卸压
deep hole blasting
sealing material
rock burst
blasting pressure relief
