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以贵州省青龙矿为研究实例,重点探讨构造煤与构造应力场的耦合作用及其对煤与瓦斯突出的影响。分析了青龙井田地质构造演化,模拟和计算了现今构造应力场,总结了构造煤的类型及其分布特征。发现该矿煤与瓦斯突出位置是构造应力场中主应力差较低的区域,压性断层附近的构造煤具有分带现象,自断层面远离断层构造煤从韧性系列向脆性系列过渡。认为构造煤结构与构造应力场在时间上的耦合形成脆性-韧性变形的构造煤系列,在空间上的耦合导致构造煤在断层两侧的发育具有明显的分带性。构造煤与构造应力场的耦合控制了煤层瓦斯的产生、运移和聚集,并导致了在脆性-韧性构造煤条带状分布的压性断层附近易于发生煤与瓦斯突出。
Taking Qinglong Mine in Guizhou Province as an example, the coupling between tectonic coal and tectonic stress field and its influence on coal and gas outburst are discussed emphatically. The geological tectonic evolution of Qinglong Minefield is analyzed, the current tectonic stress field is simulated and calculated, and the types and distribution characteristics of tectonic coal are summarized. It is found that the location of coal and gas outburst in the mine is a region with low main stress difference in the tectonic stress field. The tectonic coal in the vicinity of the compressive fault has zonation phenomenon. Transition from the ductile series to the brittle series from tectonic coal away from fault plane. It is considered that the coupling of tectonic coal and tectonic stress field in time forms brittle-ductile tectonic coal series, and the spatial coupling of tectonic coal has obvious zonation on both sides of the fault. The coupling of tectonic coal with the tectonic stress field controls the generation, migration and accumulation of coal seam gas and leads to the tendency of coal and gas outburst in the vicinity of the compressive fault with banded distribution of brittle-ductile coal strata.