摘要
针对煤油气共存矿井工作面掘进过程中底板油型气涌出问题,采用现场跟踪观测、数值模拟和理论分析的方法,研究掘进工作面底板油型气涌出机理。现场观测结果表明,掘进工作面底板油型气涌出主要受到油型气储集层分布、巷道开挖、底鼓裂隙等因素的影响。数值模拟结果表明,巷道开挖引起地层应力、应变发生变化,导致底板岩层变形破坏,产生裂隙。综合研究分析认为,掘进工作面底板油型气涌出是油型气储集层分布、巷道开挖扰动、地应力和油型气压力等因素综合作用的结果,其中油型气储集层分布是物质前提,巷道开挖扰动是诱导因素,地应力创造了运移通道,油型气压力是动力因素。
Aiming at the problem of the oil-type gas emission from the heading face floor in the coal-oil-gas coexisting mine,the oil-type gas emission mechanism from the heading face floor was discussed in this paper through the field follow-up observation,numerical simulation and theoretical analysis. The field observation results showed that the oil-type gas emission from the heading face floor was mainly affected by the reservoir distribution of oil-type gas,the roadway excavation and the floor heave fractures. The numerical simulation results showed that the roadway excavation led to the change of the strata stress and strain,which then caused the deformation and damage of floor strata and the generation of fractures. It was concluded from the comprehensive analysis that the oil-type gas emission from the heading face floor was resulted from the reservoir distribution of oil-type gas,the roadway excavation disturbance,the strata stress,the oil-type gas pressure and so on,of which the reservoir distribution of the oil-type gas was the material precondition,the roadway excavation was the induction factor,the strata stress created the gas migration channels,and the oil-type gas pressure provided the power.
出处
《矿业安全与环保》
北大核心
2017年第4期90-94,共5页
Mining Safety & Environmental Protection
基金
国家科技重大专项(2016ZX05045-002-002)
关键词
煤油气共存矿井
掘进工作面
油型气
扰动效应
涌出机理
coal-oil-gas coexisting mine
heading face
oil-type gas
disturbance effect
emission mechanism
