Grouting Technology and Application of Roadway Driving on Lower Slice through Coal Seam Roof Pressure Crushing Zone

HAO Yangjun; GUO Liang; TIAN Yuanshuai; WU Chenghao; LI Rifu

Mining Safety & Environmental Protection > 2018 > 45(3): 98-101.

HAO Yangjun, GUO Liang, TIAN Yuanshuai, WU Chenghao, LI Rifu. Grouting Technology and Application of Roadway Driving on Lower Slice through Coal Seam Roof Pressure Crushing Zone[J]. Mining Safety & Environmental Protection, 2018, 45(3): 98-101.

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Grouting Technology and Application of Roadway Driving on Lower Slice through Coal Seam Roof Pressure Crushing Zone

1. Yuecheng mine, Qinxiu Company, Shanxi Jincheng Anthracite Mining Group Co., Ltd., Jincheng 048000, China;
2. CCTEG Chongqing Research Institute, Chongqing 400037, China

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Received Date: May 26, 2017
Revised Date: July 09, 2017
Available Online: September 16, 2022

Graphical Abstract

Abstract

Abstract

In view of the problem that the bolting anchoring force and pre-tightening force can't up to standard, roof is easy to fall and collapse in the process of tunneling, which caused by the crushing of roadway roof in the working face of the lower slice coal roadway. In order to eliminate the hidden danger and improve the driving efficiency as well as the stability of roadway surrounding rock, the pre-grouting technology was used during the excavation process of Ⅲ 1216 roadway in No. 3 coal seam in Yuecheng Coal Mine in Qinxiu Company. The construction parameters and grouting process of bore grouting were introduced. The field application results showed that the integrity and strength of coal seam roof in front of the working face was increased by pre-grouting, and the stress state of the roof was also changed, at the same time, the safety of driving in crushing zone of overburden coal in working face was improved. As a result, the efficiency of single-class driving was increased by 200%, the overall driving speed of the roadway was increased by 20%.
- slicing mining,
- coal roadway driving,
- pre-grouting,
- crushing area of coal seam roof,
- surrounding rock control

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References (15)

References

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