基于流場模擬的綜放面自燃危險區域劃分及預測

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基金項目:

“十五”科技攻關項目（No.2004BA803B0114）；國家杰出青年基金（No.50125414）；陜西省教育廳自然科學基金（No.05JK261）

Partition of spontaneous combustion dangerous zone and prediction of spontaneous combustion based on numerically modeling the flow field at fully mechanized caving face

1. Energy and Power School, Xi'an Jiaotong University, Xi'an 710061, China;
2. Energy School, Xi'an University of Science and Technology, Xi'an 710054, China;
3. Shuangyashan Coal Group, Shuangyashan 155100, China

摘要: 通過對采空區滲流場的數值模擬,得到采空區滲流速度及氧氣體積分數的分布.結合實驗測得的煤自燃發火期和自燃臨界參數,對采空區"三帶"進行劃分,并得到了采空區不自燃的工作面最小推進度.該方法計算量比模擬采空區煤自燃全過程少得多,預測精度卻能夠滿足實際防滅火需要.
- 采空區 /
- 自燃 /
- 危險區 /
- 數值模擬 /
- 預測
Abstract: The distribution of oxygen concenlration and the velocity of air flow in a mined-out area were determined by numerically simulating the flow field. With the simulated results together with the duration and threshold of coal spontaneous combustion obtained from experiments, the spontaneous combustion dangerous zone was partitioned into three zones, and the smallest working face moving velocity to prevent spontaneous combustion was calculated. Compared with the simulation of the whole process of coal spontaneous combustion in a mined-out area, this proposed method requires a smaller amount of calculations, but its precision can satisfy the demand to predict and prevent spontaneous combustion in the mined-out area.
- mined-out area /
- spontaneous combustion /
- dangerous zone /
- numerical simulation /
- prediction