大倾角特厚煤层综放面瓦斯治理技术

Gas control technology on fully mechanized top coal caving face inbig angle extra thick coal seam

本文以赵各庄矿3237西上面为研究对象,根据3237西上面的地质条件及开采工艺,分析3237西上面的瓦斯来源,探讨该面瓦斯易于积聚的原因,在本煤层预抽不理想的情况下,提出对角引巷抽采、顶板走向高抽巷抽采技术,其中对角引巷抽采起到了类似Y型通风系统的效果。瓦斯治理技术实施后,综放面所需风量由最高的1500m3/min降低到990m3/min左右,回风巷瓦斯浓度不超过0.4%,为大倾角特厚煤层条件下综放面的安全高效开采提供了方法。

The 3237 west above face was researched in zhaogezhuang mine in this paper ,based on the geological conditions and mining technology of 3237 west above face ,the gas source of 3237 west above face was analyzed .The reason of gas accumulation in this face was discussed .The drainage of the coalseam is not in an ideal situation ,the drainage tecknowledge including diagonal lead roadway drainage and the drainage of high pumping in the roof was put forward to control gasin 3237 west above face ,in which the diagonal lead roadway drainage plays a similar effect of Y type of ventilation system .After gas control technology was implemented ,the air volume required in fully mechanized top coal caving faces lowed down from the maximum 1500m3/min to about 990m3/min ,and the gas concentration was not less than 0 .4% in the return airway ,providing ways for safe and efficient mining working face in fully mechanized top coal caving face in big angle extra thick coal seam .