浅埋藏近距离煤层群综采工作面低氧原因分析
发布时间：2019-02-16 22:18
【摘要】：基于神东矿区厚松散层薄基岩浅埋藏近距离煤层群的开采特点,分析了工作面低氧的原因,给出了工作面低氧的防治对策。神东矿区煤层处于氮气-二氧化碳带,采空区遗煤低温氧化产生大量低氧气体,在通风负压和大气压力的作用下,通过漏风通道由采空区向回风隅角涌出,造成工作面低氧。采用多种技术手段防治低氧:在开拓开采方面,少留或不留联络巷,减少采空区遗煤,采空区达5个以上时,相邻工作面留设足够距离的隔离煤柱;在安全监测方面,设置氧气传感器、警示标牌,建立低氧预警机制;在通风系统方面,根据实际条件采用"U+L"型、"Y"型或均压通风系统;在通风技术及管理方面,采取封堵漏风通道,对采空区进行卸压等措施。
[Abstract]:Based on the mining characteristics of shallow buried short distance coal seams with thick loose strata and thin bedrock in Shendong mining area, the reasons of low oxygen in working face are analyzed, and the countermeasures of preventing and treating low oxygen in working face are given. The coal seam of Shendong mining area is located in the nitrogen and carbon dioxide zone, and the low temperature oxidation of the coal left in the goaf produces a large amount of low oxygen gas. Under the action of negative pressure of ventilation and atmospheric pressure, through the air leakage passage from the goaf to the corner of the return air, it causes the low oxygen in the working face. Adopting many kinds of technical means to prevent and cure low oxygen: in developing and mining, few or no contact roadways are left, and the remaining coal in goaf is reduced. When the goaf reaches more than 5, the separated coal pillar with enough distance is kept in the adjacent working face; In the aspect of safety monitoring, oxygen sensor, warning sign and low oxygen warning mechanism should be set up, "U L" type, "Y" type or even pressure ventilation system should be adopted according to actual conditions in ventilation system. In the aspect of ventilation technology and management, measures such as sealing air leakage passage and releasing pressure in goaf are taken.
【作者单位】： 神华神东煤炭集团有限责任公司;
【分类号】：TD72
本文编号：2424893
[Abstract]:Based on the mining characteristics of shallow buried short distance coal seams with thick loose strata and thin bedrock in Shendong mining area, the reasons of low oxygen in working face are analyzed, and the countermeasures of preventing and treating low oxygen in working face are given. The coal seam of Shendong mining area is located in the nitrogen and carbon dioxide zone, and the low temperature oxidation of the coal left in the goaf produces a large amount of low oxygen gas. Under the action of negative pressure of ventilation and atmospheric pressure, through the air leakage passage from the goaf to the corner of the return air, it causes the low oxygen in the working face. Adopting many kinds of technical means to prevent and cure low oxygen: in developing and mining, few or no contact roadways are left, and the remaining coal in goaf is reduced. When the goaf reaches more than 5, the separated coal pillar with enough distance is kept in the adjacent working face; In the aspect of safety monitoring, oxygen sensor, warning sign and low oxygen warning mechanism should be set up, "U L" type, "Y" type or even pressure ventilation system should be adopted according to actual conditions in ventilation system. In the aspect of ventilation technology and management, measures such as sealing air leakage passage and releasing pressure in goaf are taken.
【作者单位】： 神华神东煤炭集团有限责任公司;
【分类号】：TD72
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