Combined grouting and reinforcement technology for deep and shallow holes in soft and broken coal roadway

LI Lin; GU Wei; SONG Gang

Safety in Coal Mines > 2021 > 52(9): 108-115,121.

LI Lin, GU Wei, SONG Gang. Combined grouting and reinforcement technology for deep and shallow holes in soft and broken coal roadway[J]. Safety in Coal Mines, 2021, 52(9): 108-115,121.

Citation:

LI Lin, GU Wei, SONG Gang. Combined grouting and reinforcement technology for deep and shallow holes in soft and broken coal roadway[J]. Safety in Coal Mines, 2021, 52(9): 108-115,121.

Citation:

LI Lin, GU Wei, SONG Gang. Combined grouting and reinforcement technology for deep and shallow holes in soft and broken coal roadway[J]. Safety in Coal Mines, 2021, 52(9): 108-115,121.

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Combined grouting and reinforcement technology for deep and shallow holes in soft and broken coal roadway

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Published Date: September 19, 2021

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Abstract

Abstract

Aiming at the problem that the coal bodies of the two sides of the roadway were loosened and destroyed to cause the coal body to be compressed and the deformation of the roof and the two sides during the advancing process of roadway 43222 in the fourth panel area of Changping Coal Mine. Through the analysis of the grouting reinforcement mechanism of the surrounding rock of the roadway, as well as the simulation study of the disturbance of the working face of the 43222 roadway, the grouting parameters are finally determined and the grouting scheme is given. The on-site monitoring results show that the grout fully enters the joints and fissures after the grouting is completed, filling the broken areas, and the roadway deformation is controlled, the roof sinking amount is stable at 80 mm, the floor heave amount is stable at 63 mm, and the two-side approaching amount is stable at 110 mm. The overall stability of the surrounding rock has been improved, which effectively solves the difficulty problem of leaving soft and broken coal roadways, and meets the demand for continued use of the next working face.
- broken surrounding rock,
- grouting reinforcement,
- grouting paramete,
- numerical simulation,
- grouting effect

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References

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