Technology of thick alluvium and thin bedrock coal seam floor reinforcement based on L type drilling construction
SUN Xiaoyu
AN Xuliang
Abstract：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 Ls 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.
Keywords：thick alluvial layerbedrockreinforcing seam floorground L type drill
Publication Date：2017-01-01