Substantiation of Drilling Parameters for Undermined Drainage Boreholes for Increasing Methane Production from Unconventional Coal-Gas Collectors

Decarbonization of the mining industry on basis closing energy generation, cogeneration coal mine methane, and internal consumption is a promising direction in ensuring sustainable development. Known problems deep underground do not allow for realizing potential man-made gas reservoirs due to deterioration conditions development reserves georesources. The aim work was improve recommendations substantiation drilling parameters undermined drainage boreholes increasing methane production from unconventional coal-gas collectors. authors’ approach innovation lies possibility using established patterns better natural stability optimize them as spatial orientation an existing passport improvement extraction productivity. For this purpose, smoothing (LOESS) experimental data two similar types wells used; then deterministic interpolation methods combination with three-dimensional representation response function “gnuplot” were used. As result, it found that increase inclination angle 40° 60° leads significant transformation model studied process, accompanied by decline dynamics emission decrease distance productive zone type well 13 5 m before roof landing, which replaced sharp up 35 ahead longwall face. This allows under specific recommending productivity capex technogenic disturbed reservoir replacement smaller rise transition more frequent grid clusters #4.