基于遗煤自燃防治的综放工作面合理推进速度的确定

发布时间：2018-03-05 22:34

本文选题：工作面推进速度　切入点：遗煤自燃　出处：《矿业安全与环保》2017年01期 　论文类型：期刊论文

【摘要】：为了研究综放工作面推进速度对采空区遗煤自燃的影响规律,采用理论分析、数值模拟、相似模拟及回归分析等方法,对工作面推进速度与工作面采出率、采空区应力场、孔隙率分布规律、漏风量,以及氧化带宽度的关系进行了研究,得到工作面推进速度与各因素的函数关系,以及工作面推进速度的合理确定方法。分析结果表明:防止遗煤自燃的工作面推进速度存在下限值和上限值,当利用上限值和下限值估算的工作面合理推进速度范围存在并且具有较大变化空间时,再对采出率加以考虑,即可得到有效防止遗煤自燃的合理工作面推进速度;当此范围不存在或范围较小时,说明提高工作面推进速度不能防止遗煤自燃,这时工作面的合理推进速度应主要依据采出率进行确定。工作面推进速度越小,与氧化带宽度的关系曲线越平缓,提高推进速度越有利于防止遗煤自燃。
[Abstract]:In order to study the influence of advance speed of fully mechanized caving face on spontaneous combustion of coal left in goaf, theoretical analysis, numerical simulation, similarity simulation and regression analysis were used to analyze the speed of working face, mining rate and stress field in goaf. The relationship among porosity distribution, air leakage and the width of oxidation zone is studied, and the functional relationship between working face speed and various factors is obtained. The analysis results show that there are lower and upper limit values in the working face to prevent the spontaneous combustion of coal. When the reasonable speed range of the working face estimated by the upper limit value and the lower limit value exists and has a large change space, the reasonable working face advance speed can be obtained by considering the mining rate and effectively preventing the spontaneous combustion of the remaining coal. When the range does not exist or the range is small, it shows that the increase of the working face speed cannot prevent the spontaneous combustion of the coal, and the reasonable speed of the working face should be determined mainly on the basis of the mining rate. The smaller the speed of the working face is, The more gentle the curve is with the width of the oxidation zone, the more favorable the advance speed is to prevent the spontaneous combustion of coal.
【作者单位】：辽宁工程技术大学安全科学与工程学院;
【基金】：国家自然科学基金项目(51374121,51404131)
【分类号】：TD752.2

【相似文献】