炮采煤层工作面瓦斯涌出规律的数值模拟研究  

Numerical Simulation of Methane Emission Regularity in Coal Face Used Blasting

作　　者：姜文忠[1] 李野[2] 梁冰[2] 

机构地区：[1]煤炭科学研究总院沈阳研究院,沈阳110016 [2]辽宁工程技术大学力学与工程学院,阜新123000

出　　处：《系统仿真学报》2010年第6期1531-1534,共4页Journal of System Simulation

基　　金：国家重点基础研究发展计划973计划课题(2005CB221503)

摘　　要：研究煤层瓦斯在采动影响下的流动规律是煤矿安全生产的一个关键性问题。考虑爆破振动和固体骨架可压缩因素,建立了炮采煤层掘进面煤与瓦斯流固耦合数学模型。应用FLAC3D差分程序,利用fish语言将变化的孔隙率和渗透率引入到计算中,模拟了煤层在爆破振动作用下掘进面瓦斯流动规律。仿真结果表明:炮采煤层工作面处岩体受振动影响破坏程度较大,巷道顶板位移较小,岩体的破坏主要集中在工作面附近;煤层中的瓦斯压力由远处至工作面逐渐减小,距工作面5米以内的煤层瓦斯压力梯度较大;炮采时,掘进面附近瓦斯压力梯度较大,沿掘进方向孔隙压力呈非线性分布,机掘时,沿掘进方向孔隙压力呈线性分布。Researching the methane emission regularity under mining is a key point to ensure safety in coal mines. Considering blasting vibration and compressible solid skeleton factors, a fluid solid coupling mathematical model in the coal face used blasting was established. Applying with Flac3D difference program, the porosity and permeability were put which changed into the calculation by fish language. The coal methane emission regularity in coal face used blasting was simulated. The results show that with the influence of blasting, the rocks in coal face have a larger extent of damage to the vibration, the rocks on the roof of the tunnel have a smaller displacement to the vibration than in coal face. The main damage areas are near the coal face. The coal methane pressure is gradually reduced from distance to coal face. The coal methane pressure gradient is bigger in five metres to coal face than other areas. When blasting, the gradient of the coal methane pressure is larger in coal face and it turns to be non-linear distribution along the tunnel direction. But the gradient of the coal methane pressure turns to be linear distribution along the tunnel direction by mechanical.

关 键 词：炮采掘进面 瓦斯 动载 流固耦合 FLAC3D 

分 类 号：TD712[矿业工程—矿井通风与安全]