浅埋深近距离煤层群超大采空区火区治理技术

Fire Area Treatment Technology of Shallow Depth and Close Distance Coal Seam Group in Large Goaf

补连塔煤矿所采煤层属易自燃煤层,具有浅埋深、近距离的特点,其采空区面积大,一旦出现火灾,其危害程度严重、治理难度大。22305综采工作面上覆采空区火区在采取了调整通风系统、火源探测、井上下测温、井上下封堵、地面钻孔灌注胶体、三相泡沫和粉煤灰、地面钻孔直注液态N2和液态CO2等综合措施后,保证了工作面的顺利回采。

The coal seams of Bulianta Coal Mine are liable to spontaneous combustion. It has the features of shallow depth and close distance, the area of goal is very large. When the fire occurs, the damage degree is serious, and the governance difficulty is big. The comprehensive treatment measures are taken in the overlying goal fire area of 22305 fully mechanized mining face, which include the ventilation system adjustment, fire source detecting, temperature measuring of mine surface -underground, plugging of mine surface - underground, drilling and pouring the colloid on the ground, three - phase froth and fly ash, liquid N2 and liquid CO2 injection through the ground drill, these measures ensure smooth mining for the working face.