高瓦斯孤岛工作面收尾两巷预注浆加固研究
Pre-grouting Reinforcement for High Gassy Isolated Working Face in Two Ending Roadways
-
摘要: 为了解决孤岛工作面破碎对工作面收尾的影响，采用地质力学方法测试分析了孤岛工作面的地应力分布特征，采用数值模拟软件FLAC3D分析了孤岛工作面矿压显现特征、超前支承压力分布特征等。决定采用深孔高压注浆对N1-3孤岛工作面停采线附近煤体进行预注浆处理，注浆压力25～30 MPa。开发的水泥改性液可使水泥浆和煤体黏结强度达到1.2 MPa；采用造壁成孔对原有瓦斯抽放孔进行了利用，工作面收尾仅用11 d，通过停采线附近煤体的现场验证。结果表明：通过两巷超前预注浆，煤体恢复完整，保证了工作面的正常收尾。Abstract: In order to solve the problem that the influence of broken coal body on working face finishin,the ground stress distribution state is analyzed by ground stress test; mining pressure characters, abutment pressure are analyzed by software FLAC3D, then high pressure grouting is used to reinforce the coal near the stop mining line, the grouting pressure is 25 to 30 MPa. Modified cement liquid is developed to improve the cohesion between coal and cement, the cohesion between coal and cement is 1.2 MPa, and gas drainage hole is reused by grouting hole-forming, the working face enclosure only last 11 days. The grouting result is checked on site, the results show that the working face is integrity, and grouting result is great.
-
-
[1] 康红普,冯志强.煤矿巷道围岩注浆加固技术的现状与发展趋势[J].煤矿开采,2013,18(3):1-7. [2] 李龙生,韩晓东.厚煤层综放工作面过特大断层技术实践[J].煤炭科学技术,2012,40(10):52-54. [3] 张鹏冲,张农,郑西贵,等.煤巷过陷落柱深孔注浆加固技术[J].煤炭工程,2012(6):38-40. [4] LI Wenzhou.Synthesis Grouting and Anchoring Reinforcement Application in Deep Roadway [C]//China International Pittsburgh Coal Conference,Beijing,2013. [5] 刘文水,王新刚,冯春喜,等.注浆材料与施工工艺[M].北京：中国建材工业出版社，2008:77-79. [6] 黄大维,周顺华,刘重庆,等.护壁套管钻孔灌注桩微扰动施工分析[J].岩土力学,2013(4):1103-1108. [7] 韩建,隆威,郑克清.煤系复杂地层钻探护壁浆液研究与应用[J].煤田地质与勘探,2013(6):22. [8] 蔡文鹏,刘健,孙东生,等.顶板走向高位钻孔瓦斯抽采技术的研究与应用[J].中国安全生产科学技术，2011(12):35-38. [9] 李泉新.煤层底板超前注浆加固定向钻孔钻进技术[J].煤炭科学技术,2014(1):138-142. [10] 许延春,杨扬.回采工作面底板注浆加固防治水技术新进展[J].煤炭科学技术,2014(1):98-101.
计量
- 文章访问数: 427
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
