摘要
为降低大气压变化造成矿井发生安全事故的可能性,将地面大气压变化数据与某矿工作面瓦斯浓度变化数据进行分析,研究地面大气压的变化规律与传播规律及其对矿井气压的影响,分析大气压变化对工作面瓦斯涌出的作用影响。结果表明:该地区海拔高度每增高1m气压降低大约10 Pa,大气压力发生变化会传递到井下空间,其传递方式与声波相同,且井下压力的变化滞后于大气压力。大气压力的下降速度越快则工作面瓦斯浓度的增加速度也越快,与大气压力下降的具体值关系不大。研究结果可为瓦斯异常涌出预警及相关治理措施的制订提供参考依据。
In order to reduce the possibility of safety accidents in mines caused by the changes in atmospheric pressure,the data of surface atmospheric pressure change and the change of gas concentration in a mine working face are analyzed to study the change law and propagation law of surface atmospheric pressure and its influence on mine air pressure,and analyze the effect of atmospheric pressure change on gas emission in working face.The results indicate that for every meter increase in altitude in the region,the air pressure decreases by about 10Pa,and the change of atmospheric pressure will be transmitted to the underground space in the same way as the sound wave,and the change of underground pressure lags behind the atmospheric pressure.The faster the decrease in atmospheric pressure,the faster the increase in gas concentration in the working face,which is not closely related to the specific value of atmospheric pressure decrease.The research results can provide reference for the early warning of abnormal gas emission and the formulation of relevant control measures.
作者
王月红
杨华
王洪岩
岳凯旭
WANG Yuehong;YANG Hua;WANG Hongyan;YUE Kaixu(School of Mining Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China;Hebei Key Laboratory of Mine Development and Safety Technology,Tangshan Hebei 063210,China)
出处
《安全》
2023年第4期63-67,共5页
Safety & Security
基金
国家自然科学基金资助项目(51504077,51404086)
河北省自然科学基金资助项目(E2016209056)
华北理工大学杰出青年基金资助项目(jp201509,JQ201710)。
关键词
大气压力
瓦斯涌出
压力变化
瓦斯浓度
atmospheric pressure
gas emission
pressure change
concentration of gas
