综采工作面地应力场变化对瓦斯压力场的影响研究

Research on the Influence of Change of Ground Stress Field on Gas Pressure Field in Fully Mechanized Mining Face

为保证3208综采工作面煤层瓦斯的抽采利用,防止回采过程中发生瓦斯灾害事故,采用测定煤层瓦斯压力的方法发现工作面瓦斯压力与采动应力呈正相关,这是由于应力的变化导致原生裂隙发生改变,抑制或促进瓦斯运移造成的。通过监测综采工作面前方瓦斯压力的变化,分析综采工作面前方应力集中情况,对瓦斯灾害的防治及瓦斯的抽采利用具有一定的指导意义。

In order to ensure the gas drainage and utilization in 3208 fully mechanized mining face and prevent the gas disaster accident in the process of mining,the method of measuring the gas pressure in coal seam was used to find that the gas pressure in the working face was positively related to the mining stress,which was caused by the change of the stress leading to the change of the original fracture and the inhibition or promotion of gas migration.Through monitoring the change of gas pressure in front of the fully mechanized mining face,the stress concentration in front of the fully mechanized mining face was analyzed,which has certain guiding significance for the prevention and control of gas disaster and gas extraction and utilization.