摘要
松软厚煤层巷道掘进过程中,为了减小巷道支护难度及利于瓦斯防治,通常选取沿顶板掘进,但沿顶掘巷不利于布置放顶煤工作面。受煤层赋存条件影响,为便于巷道取直布置输送机,势必造成巷道层位布置时而沿顶时而沿底。因此,从这2种不同的巷道层位布置方式对突出危险性影响的角度出发,运用数值模拟软件FLAC^(3D)和RFPA^(2D)-Flow进行工作面力学及突出模拟对比分析。研究结果表明,在相同参数设置条件下,沿顶掘巷时工作面前方应力集中范围及应力值、塑性变形区范围,巷道围岩变形量及变形程度均小于沿底掘巷的,可见在相同条件下沿顶掘巷的突出危险性要小于沿底掘巷的突出危险性。因此松软厚煤层应尽量避免沿底掘进,在不得已情况下选择沿底掘进时,应加强巷道支护。
In order to minimize the difficulties in roadway support and gas prevention and control in the process of roadway tunneling in soft thick coal seam, tunneling along the roof of the coal seam was taken usually, but it is not advantageous to arrange the caving mining face. Because of the occurrence conditions of the coal seam, to arrange the conveyor conveniently for the flat roadway, it is bound to cause the roadway horizon arranged alternately along the top and bottom. We mainly focus on the angle of the influence of outburst risk from two different types of roadway horizon, and use numerical simulation software FLAC^3D and RFPA^2D-Flow to anlyze working face mechanics and outburst simulation comparison. The results show that the stress concentration range and stress value, the range of plastic deformation zone, and the deformation degree of roadway surrounding rock in driving along the top are less than that along the bottom under the same parameter setting condition. It can be seen that the outburst risk of roadway along the top is less than that along the bottom. Therefore, the roadway tunneled along the bottom should be avoided as far as possible. The roadway support should be strengthened when the bottom tunneling is chosen unavoidably.
作者
杨守国
王武超
李树刚
YANG Shouguo1,2, WANG Wuchao1,2, LI Shugang1,2(1. College of Safety Science and Engineering, Xi＇an University of Science and Technology, Xi＇ an 710054, China;2.Key Laboratory af Western Mine Exploitation and Disaster Prevention and Control af the Ministry of Education, Xi＇an 710054, Chin)
出处
《煤矿安全》
CAS
北大核心
2018年第3期160-163,共4页
Safety in Coal Mines
基金
陕西省科技计划经费资助项目(2013K11-20)
陕西省教育厅科研计划资助项目(2013JK0868)
中国博士后基金资助项目(2013M542366)
关键词
松软厚煤层
突出危险性
巷道层位
沿顶掘巷
沿底掘巷
soft and thick coal seam
coal and gas outburst risk
horizon of roadway
driving along top
driving along bottom
