摘要
为深入研究深井高地应力条件下,面长变化对采场支承压力分布的影响规律,以淮南矿区某深部矿井为工程背景,基于FLAC^(3D)数值模拟软件和工程实践,分析了推进距离S与面长L之比分别为0.5、1.0、1.5 3种情况下的支承压力演化规律。结果表明:随着面长增加,支承压力峰值位于煤壁前方10 m处,应力集中系数达到2.7;沿工作面走向方向,当S与L之比为0.5时,支承压力峰值在面长超过360 m后呈现降低趋势;沿工作面倾向方向,S与L之比为1.0和1.5时,采场两端的支承压力峰值随面长增加呈现先增大、后减小的趋势。从采场矿压控制及灾害防治两方面综合考虑,优选工作面长度在200~240 m之间。
Under high geostress condition, for further research the impact of slope length changes on distribution laws of the stope abutment pressure, taking the deep mine in Huainan Mining Area as an engineering background and based on the numerical simulation software FLAC3D and engineering practice, the evolution laws of support pressure are analyzed under the ratio that the advance distance to slope length is 0.5, 1.0, 1.5. The results show that： with the increase of the slope length, the peak value of abutment pressure is located in front of the coal wall 10 m, and the stress concentration factor is 2.7; along strike direction of stope, when the ratio of S to L is 0.5, the peak of the abutment pressure is lower than that of 360 m; along incline direction of panel, when the ratio of S to L is 1.0 and 1.5, the peak value of abutment pressure at both ends of the stope shows a trend of first increase and then decrease. Comprehensive consideration of two aspects of coal mining pressure control and disaster prevention, the optimal slope length is between 200 m and 240 m.
出处
《煤矿安全》
北大核心
2017年第9期201-203,共3页
Safety in Coal Mines
关键词
深部采场
支承压力
演化特征
面长效应
模拟分析
deep stope
abutment pressure
evolution characteristic
slope length effect
simulation analysis
