甘肃窑街矿区CO_2气体突出灾害的成因及防治研究

Study on CO_2 Outburst Hazard Causation and Control in Yaojie,Gansu

CO_2气体突出是煤矿井下的重大自然灾害之一,严重威胁着煤矿的安全生产。甘肃窑街矿区的CO_2气体突出规模最大,造成的损失也最严重。通过对窑街矿区CO_2气体突出灾害进行分析,认为突出的CO_2气体为无机成因,断裂构造是CO_2气体的主要运移通道,煤2层和破碎断裂带是CO_2气体的主要储层。CO_2气体突出灾害不但与断裂构造有关,还与盆地沉积基底的大理岩密不可分,按照"先探后掘、先抽后采"的原则,可预防CO_2气体突出灾害的发生。

The CO_2 outburst is one of major natural disasters in the coalmine underground,seriously threatening safety in coal production. CO_2 outburst scale in the Yaojie mine area is the largest and had caused worst loss in the country. Through the analysis of the hazard in the mine area has considered that the outburst CO_2 is inorganic origin. The faulted structures are the main migration channels of the outburst,while the coal No. 2 and fragmentized faulted zones are the main CO_2 reservoirs. The CO_2 outburst hazard is not only related to faulted structures,but also has inseparable relation with marble in the basin sedimentary basement. Carrying out the principle of 'exploring first then advancing; drainage first then extraction'can prevent the CO_2 outburst hazard from happening.