Mined-out area air leakage field optimization based coal and gas symbiotic disaster control method
A technology of goaf and air leakage, which is applied in the direction of gas emission, design optimization/simulation, dust prevention, etc., can solve problems such as unconsidered goaf flow field, increased risk of spontaneous combustion of coal, spontaneous combustion of residual coal, etc., to ensure gas protection Drainage effect, realization of coal and gas co-occurrence disaster prevention, and optimization effect of air leakage field
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[0039] The present invention will be further explained below.
[0040] Such as Figure 1 to Figure 4 As shown, the specific steps of the present invention are:
[0041] A. Determine the distribution range of the crack field in the goaf and its overlying strata, and then determine the height range of the borehole position: the height range of the crack zone 2 of the coal seam in the goaf is calculated by the following formula (1), The height range of the fracture zone of the rock formation is obtained from the known geological data; since the drilling location is within the height range of the fracture zone 2 of the coal seam in the goaf 8, it is obtained by formula (2);
[0042]
[0043]
[0044] Among them, ∑M is the thickness of the coal seam, H F Is the height of fissure zone 2 in the goaf 8 coal seam, H D Is the height of the drilling position;
[0045] B. Determine the reasonable gas drainage method according to the fracture field distribution range and the existing coal mine ge...
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