坚硬顶板切顶沿空留巷顶板运移规律及切缝参数分析

doi:10.11799/ce202011020

Abstract

Abstract: Based on the engineering background of cutting roof along the hollow roadway under the condition of hard roof in tangshangou coal mine, in order to reasonably determine the cutting parameters of the roadway, this paper analyzes the law of overburden movement along the hollow roadway and the structural characteristics of roof fracture by using "masonry beam" theory. The results show that: under the condition of hard roof, the roof of cut-top retaining roadway will be hinged with each other to form the balance structure of masonry beam. The underground test shows that the roof cutting parameters obtained by the calculation formula in this paper can make the side roof of the goaf in the roadway better be "cut off ", and the pressure of the roof and the amount of the roof moving in the roadway are within the controllable range to meet the needs of safety production.

CLC Number:

TD322

References 22

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Analysis of the movement law and cutting seam parameters in gob side entry retaining under hard roof condition

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