采空区自燃“三带”划分与综采面极限推进速度研究

Study on the Division of Spontaneous Combustion"Three Zones"in Goaf and the Limit Advancing Speed of Fully Mechanized Face

为精准测定神达金山矿13101综放工作面采空区“三带”区域,试验应用进、回风两侧采空区内O2含量变化对其进行划分,得出工作面进风侧处散热带为0~30.4 m,氧化带为30.4~72 m,窒息带为72 m以里;回风侧处散热带为0~14.4 m,氧化带为14.4~36.8 m,窒息带为36.8 m以里;当13101工作面月推进速度大于12.89 m时,采空区无自然发火危险;当工作面月推进速度小于12.89 m时,采空区将有自然发火危险。

In order to accurately determine the"three zones"in the goaf of 13101 fully mechanized top coal caving face in Shenda Jinshan Mine,the test applied the change of O2 content in the goaf on both sides of the inlet and return air to divide it.The results show that the heat dissipation zone at the inlet side of the working face is 0-30.4 m,the oxidation zone is 30.4-72 m,and the suffocation zone is more than 72 m;the heat dissipation zone at return side is 0-14.4 m,the oxidation zone is 14.4-36.8 m,and the suffocation zone is more than 36.8 m.When the monthly advancing speed of 13101 working face is greater than 12.89 m,there is no risk of spontaneous combustion in the goaf;when the monthly advancing speed of working face is less than 12.89 m,the goaf will have the risk of spontaneous combustion.