Advanced Roof Cutting and Pressure Relief Technology and Application of Mining Roadway

Chao Mi

doi:10.62051/10.62051/ijnres.v2n2.03

Authors

Chao Mi

DOI:

https://doi.org/10.62051/10.62051/ijnres.v2n2.03

Keywords:

Mining roadway; Advanced area; Top cutting and pressure relief; Surrounding rock control.

Abstract

In order to solve the problems of complex advanced support of the mining roadway, high labor intensity, poor control effect of the surrounding rock of the roadway, and the impact of the mining efficiency of the working face during the mining period of the 12203 working face of Xinzheng Coal and Power Co., Ltd., the control technology of the surrounding rock of the mining roadway in the advanced area of the mining roadway was proposed. The numerical simulation data show that the peak value of the advanced support pressure is located 8.24m in front of the working and the peak vertical stress is 21.63MPa in the non-roofing scheme, and the peak value of the advanced support pressure is located 8.64m in front of the working roadway, and the peak stress increases slightly to 21.85MPa, so as to realize the transfer of the peak value of the advanced support pressure to the deep part of the coal and rock mass. The stress concentration area of the shallow surrounding rock in the roof cutting scheme is transferred to the deep part, so that the shallow surrounding rock of the roadway is in a relatively low stress state, which significantly improves the stress environment in the advanced area of the mining roadway and provides favorable conditions for the stability control of the roadway.

References

[1]HE M C, CHENG S Y, GUO Z B, et al. Control of surrouding rock structure for gob-side entry retaining by cutting roof to release pressure and its engineering application[J]. Journal of China University of Mining & Technology, 2017, 46(05): 959-969.

[2]ZHANG G F, YU S B, LI G F, et al. Reserch on complementary supporting system of constant resistance with load release for three-soft mining roadways in extremely tinck coal seam[J]. Chinese Journal of Rock Mechanics and Engineering,2011, 30(08):1619-1626.

[3]JIA H S, WANG L, PENG B, et al. Mechansim and application of classification “roof control-pressure relief” of gob-side entry retained withweakly cakig compound roof[J], Journal of China University of Mining & Technology, 2023,52(06): 1191-1202.

[4]GAO Y B, GUO Z B, YANG J, et al. Steady analysis of gob-side entry retaining formed by roof fracturing and control techniques by optimizing mine pressure[J], Journal of China coal society, 2017, 42(07):1672-1681.

[5]MA X G, HE M C, LI X Z, et al. Deformation mechanism and control measures of overlying strata with gob-side entry retaining formed by roof cutting and pressure releasing[J], Journal of China University of Mining & Technology,2019, 48(03): 474-483.

[6]WANG J W, WANG S B, YANG J, et al. Roof failure mechanism of gob-side entry by roof cutting and pressure releasing and its control technology[J]. Coal Science and Technology, 2017, 45(08): 80-84.

[7]GUO P F, ZHANG G F, TAO Z G, et al. Blasting technology of gateway retaining along goaf pressure release by roof cutting in hard and weak complex roof[J]. Coal Science and Technology,2016, 44(10):120-124.

[8]YANG J, WANG H Y, WANG Y J, et al. Fracture characteristics of the roof in gob-side entry retaining with roof cutting and pressure release[J]. Journal of Mining & Safety Engineering, 2019,36(06): 1137-1144.