A characterization method of mine pressure weakening in filling stope
A stope and characterization technique used in fillings, mining equipment, earth-moving drilling, etc.
Active Publication Date: 2020-07-10
CHINA UNIV OF MINING & TECH
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[0003] However, for the mechanism of the impact of mining in the weakened filling body, especially the qualitative characterization of the weakened state, the quantitative expression of the degree of weakening, the reasonable definition of the criticality of the weakening effect, etc., and how to scientifically use the mechanism of the weakened mining impact of the filling body to carry out filling Stope mine pressure control, there is no complete set of design methods
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[0028] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0029] like figure 1 As shown, the present invention designs a filling stope mine pressure weakening characterization method. In practical applications, the degree of critical effect of the preset filling body weakening mining impact is defined as the state of moving cutout, such as Figure 10 As shown, specifically: the maximum displacement point of the overlying rock and the peak point of the supporting stress gradually move forward with the forward movement of the working face, and while the mining distance of the working face increases, the subsidence degree remains unchanged; and at the same time as the working face moves, The stress concentration factor of the filling stope remains unchanged, and the stress concentration factor of the filling stope remains between 1.1 and 1.3. According to the characterization meth...
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The present invention relates to a filling stope mine pressure weakening characterization method, aimed at the scientific problem of qualitative characterization and quantitative expression of filling stope mining influences and mine pressure behavior weakening, introducing a concept of moving cut hole for qualitative characterization, analyzing on the basis of four indexes including overburden-rock displacement of an open-off cut and different stopping positions, an advance support stress concentration coefficient, a support stress peak value and a support stress influence range, so as to give a critical condition of forming a moving cut-hole effect, and then using a moving cut-hole state to realize the quantitative expression of the filling stope mine pressure weakening, finally guiding stope mine pressure design on the basis of the moving cut-hole effect, so as to give an engineering application basis of moving cut-hole theory, and ultimately promoting the realization of precise control of filling-mining rock-stratum positions and status.
Description
technical field [0001] The invention relates to a method for characterization of mine pressure weakening in a filling stope, belonging to the technical field of coal solid filling mining. Background technique [0002] The solid filling mining method has obvious technical advantages in rock strata movement control, surface subsidence control, "three down" coal pressing release, solid waste treatment, and roof disaster prevention and control. It has been used as a mature technology in the integration of mining, selection and filling The application boundary of the technology has also been extended to frontier scientific issues in the field of coal resource mining, such as deep resource mining, mine waste-free mining, and safe mining of coal and associated resources. [0003] However, for the mechanism of the impact of mining in the weakened filling body, especially the qualitative characterization of the weakened state, the quantitative expression of the degree of weakening, t...
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IPC IPC(8): G06F30/23E21F15/00G06F119/14
CPCE21F15/00G06F30/23G06F2119/06
Inventor 张强张吉雄武中亚齐文跃孟国豪
Owner CHINA UNIV OF MINING & TECH