遗留煤柱和构造对顺层瓦斯抽采效果的影响

为了研究平庆煤矿工作面顺层瓦斯抽采效果，根据保护层开采后形成的采空区和煤柱以及工作面构造带，对抽采影响范围进行划分，并对瓦斯抽采效果进行了分析，从而得出:煤柱对被保护煤层具有集中应力作用，使得瓦斯抽采效果大大降低；采空区和构造带均对煤层具有卸压作用，但是在以采空区卸压为主的区域瓦斯抽采效果较好，而在构造带卸压为主的区域瓦斯抽采效果相对较差。

Affect of Bedding Gas Extraction Effected by Legacy Pillar and Structure

To study the affect of bedding gas extraction effect in Pingqing Coal Mine，according to the distribution of goaf and legacy pillar after protective layer mining and tectonic belt，the scope of gas drainage drilling were divided，and the gas extraction concentrations in each region were analyzed. Then we got the following results:the legacy pillar has stress concentration effect on protective coal seam，which makes great reduction of bedding borehole gas extraction effect. The goaf and coal face structural belt both have pressure-relief effect on coal seam，but the regional gas extraction effect is better when goaf is mainly pressure-relief effect，and the gas extraction effect is relatively worse when fault zone is mainly pressure-relief effect.