Volume 47 Issue 6
Dec.  2019
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WANG Xiaolei, JI Zhigang, LUO Wenqiang. Comprehensive evaluation technology and application of grouting reinforcement effect for broken coal and rock mass[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(6): 92-97. DOI: 10.3969/j.issn.1001-1986.2019.06.015
Citation: WANG Xiaolei, JI Zhigang, LUO Wenqiang. Comprehensive evaluation technology and application of grouting reinforcement effect for broken coal and rock mass[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(6): 92-97. DOI: 10.3969/j.issn.1001-1986.2019.06.015
shu

Comprehensive evaluation technology and application of grouting reinforcement effect for broken coal and rock mass

  • 1. Department of Mining Engineering, Luliang University, Lvliang 033000, China;

  • 2. Key of Laboratory of Maintenance and Inspection of Coal Mine Mechanical Equipment of Lvliang City, Lvliang 033000, China;

  • 3. Geoscience College, Southwest Petroleum University, Chengdu 610500, China

Funds: 

Scientific & Technologial Innovation Programs of Higher Education Institutions in Shanxi(2019L0954)

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  • Received Date: February 08, 2019
  • Published Date: December 24, 2019
    Graphical Abstract
    • Abstract
  • Grouting reinforcement of broken coal and rock mass plays an important role in controlling the stability of surrounding rocks, and the grouting effect detection is an important link to ensure the grouting engineering to meet the requirements. The evaluation index was quantitatively analyzed by slurry filling rate method, mechanical parameter method, segmented water injection method, geological radar method, drilling television method and core inspection method. The comprehensive evaluation form of grouting effect was put forward, and the application research was carried out. The results show:The rate of filling slurry and coring was more than 90%; After grouting, the compressive strength and flexural strength were more 80% and 75% before mining respectively; The porosity was less than 10%; The borehole leakage was less than 4 L/min; There was only few big size(> 1mm) fracture; The most large deformation did not affect the use of normal roadway, this confirmed comprehensive grouting effect checking and evaluating form were effective.
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