L Type Borehole Ground Grouting Reinforcement Technology of Surrounding Rock in Deep Mine Roadway
YUAN Hui
DENG Jun
PU Chaoyang
AN Xuliang
CHENG Zhenfu
CHEN Yuankun
ZHOU Weijin
WANG Congping
HUANG Jian
Abstract：In order to improve the stability of surrounding rock and the security of supporting system in deep mine roadways,the directional drilling L type borehole for the ground pre-grouting reinforcement was proposed.The key technologies inclued drilling L type borehole technology,sealing technology of horizontal drilling,matching new reinforcing grout liquid and so on.The drilling equipment,inclinometer directional equipment and quality control of drilling mud with L type borehole technology were detailedly introduced.The central pumping station and electric power station of Xinhu Mine shaft bottom were grouted.The distance of horizontal grouting reinforcement achieved 200 m and vertical depth was 999 m.The results showed that the range of single-hole grouting and grouting effect on the basis of a small amount of the number of ground pre-grouting holes was substantially increased.The grouting volume reached 1 459 m3 in building up section,grouting volume reached 955. 5 m3 in horizontal drilling section.The stability of surrounding rock of deep mine roadways could be ensured.
Keywords：over 1 000 m deep mineL type boreholegrouting reinforcementsealing grout liquid technology
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 10-13,17 )