极松软易破碎综放面巷道“降钻锚注平”支护技术

doi:10.11799/ce202303009

Abstract

Abstract: In order to solve the problem of large deformation of surrounding rock under the conventional support condition of roadway in fully mechanized top coal caving face with extremely soft and easily broken coal seam in Huaibei mining area 8# seam, based on the support surrounding rock synergy mechanism, the "drilling, bolting and leveling" support technology of roadway in fully mechanized top coal caving face with extremely soft and easily broken coal seam is proposed, which is based on roadway bottom breaking and slope lowering + bolt advance support + anchor cable support + advance grouting + flat roof U-shaped steel shed support. It has been applied in Xinhu and Wobei coal 8# seams in Huaibei mining area. The field application shows that the roadway support effect is good after using the "drilling, anchoring and leveling" support technology, which can effectively control the large deformation of the roadway surrounding rock in the extremely soft and easily broken fully mechanized top coal caving face, and the tunneling speed has been greatly improved, which has great guiding significance for the props of the same type of roadway.

CLC Number:

TD353

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Study on "lowering, drilling, anchoring, grouting and leveling" support technology of roadway in extremely soft and fragile fully mechanized top coal caving face

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