基于L型钻孔巨厚冲积层薄基岩煤层底板加固技术  

Technology of thick alluvium and thin bedrock coal seam floor reinforcement based on L type drilling construction

作　　者：孙晓宇 安许良 

机构地区：[1]煤矿深井建设技术国家工程实验室,北京100013 [2]北京中煤矿山工程有限公司,北京100013

出　　处：《煤炭科学技术》2017年第10期48-53,共6页Coal Science and Technology

基　　金：国家安全生产监督管理总局2017年重大事故防治关键技术科技资助项目(2017GJ-A2-002)

摘　　要：为了保证巷道顺利掘进和安全开采,赵固一矿首次采用地面L型钻孔注浆加固煤层底板的施工技术对二1煤层底板直接含水层L_8灰岩进行探查治理。通过对地质资料的分析,二1煤层属于典型的巨厚冲积层薄基岩煤层,针对该地层特点对钻孔结构进行了合理的设计,充分分析了钻孔成孔及套管施工过程中的技术难点,针对这些技术难点采取了相应的施工技术,使地面L型钻孔注浆加固煤层底板的施工技术在巨厚冲积层薄基岩煤层底板加固工程取得了较好的应用效果。In order to ensure safe mining and smooth excavation,the technology of L mode borehole grouting was utilized to reinforce the direct limestone aquifer numbered L_8 under the Ⅱ-1 coal seam in No.1 mine of Zhaogu first. Proper borehole structure was proposed by detailed analysis of geological information of Ⅱ-1 coal seam with thick alluvium layer and thin bedrock. Also,the corresponding construction technique was also taken to solving the difficulties in the borehole drilling and pipe driving. The technology of ground L mode borehole grouting indicate a good results for coal seam floor reinforcement with thick alluvium layer and thin bedrock.

关 键 词：巨厚冲积层 薄基岩 煤层底板加固 地面L型钻孔 

分 类 号：TD322[矿业工程—矿井建设]