Research on Optimization of Coal Pressure Relief Borehole Parameters under High-Stress Conditions

Table 1

Parameters of numerical calculation model.

Serial number	Borehole diameter	Borehole arrangement	Model size/M	Number of units	Number of nodes
1	100 mm	Single row		15360	23763
2	100 mm	Triple flower		18240	28197
3	100 mm	Double row		17920	27231
4	120 mm	Single row		16340	24856
5	120 mm	Triple flower		18240	28917
6	120 mm	Double row		17920	27249
7	140 mm	Single row		15360	23763
8	140 mm	Triple flower		18240	28161
9	140 mm	Double row		17920	27195
10	160 mm	Single row		15360	23799
11	160 mm	Triple flower		20160	31209
12	160 mm	Double row		20160	31209
13	180 mm	Single row		15360	23787
14	180 mm	Triple flower		20160	31179
15	180 mm	Double row		23630	37777
16	200 mm	Single row		15360	23799
17	200 mm	Triple flower		20160	31209
18	200 mm	Double row		20160	31209