孔庄矿深部软岩巷道非对称变形数值模拟与控制对策研究  

NUMERICAL SIMULATION ON ASYMMETRIC DEFORMATION OF DEEP SOFT ROCK ROADWAY IN KONGZHUANG COAL MINE

作　　者：何满潮[1] 王晓义[1] 刘文涛 杨生彬[3] 

机构地区：[1]中国矿业大学力学与建筑工程学院,北京100083 [2]亚美大陆煤炭有限公司,山西太原030002 [3]中国地质大学工程技术学院,北京100083

出　　处：《岩石力学与工程学报》2008年第4期673-678,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2006CB202200);国家自然科学基金重大项目(50490270);教育部科学技术研究重大项目(10405)

摘　　要：煤矿开采进入深部后,地质力学环境远比浅部复杂,由此引起的非线性力学现象日益严重,给深部支护与开采带来很大难度。孔庄矿-785m水平轨道大巷地应力水平和围岩黏土矿物含量较高,并受上部采空区影响,呈现明显的非对称变形特征。在对孔庄矿进行工程地质调查与分析的基础上,结合室内岩石力学实验,运用三维数值模拟方法,研究巷道非对称变形时周围岩体的位移场分布规律,分析巷道推进到上部工作面下方时应力分布规律。数值分析结果表明,孔庄矿-785m水平轨道大巷非对称变形主要受其上部采空区煤柱的集中压力控制,黏土矿物遇水膨胀、岩层结构及高地应力作用进一步恶化巷道围岩结构。该研究可为孔庄矿深部巷道非对称变形控制对策提供初步的理论依据。With the further deep mining and the complexity of the geological and mechanical conditions of roadway become more complicated compared with those in shallow roadway. Due to the special rock strata structure and the engineering geological conditions of high geostress, high geothermal temperature, high risk of water inrush as well as the disturbance of mining activity（three-high and one-disturbance action）, roadways at great depth have the complex mechanical behaviors both in deformability and stress distribution. Consequently, the nonlinear mechanical phenomena occur with high frequency, which bring about great difficulties for deep engineering support during excavation and mining. Because of structure stress effect, high content of clay mineral and influence of the goaf on the top, it had taken on asymmetric deformation characteristic in Haulage Tunnel（level -785 m underground） at Kongzhuang Coal Mine. Based on the in-situ investigation, experimental test, analysis of engineering geological conditions, geomechanical evaluation and numerical simulation, the displacement distribution and stress distribution of the surrounding rock mass in Haulage Tunnel（level -785 m underground） at Kongzhuang Coal Mine are considered. The numerical results indicate that centralized pressure on the upper goaf may be the main reason for asymmetric deformation in Haulage Tunnel（level-785m underground） at Kongzhuang Coal Mine; and clay mineral swelling when interaction with water and in-situ stress will further deteriorate of the roadway rock structure. It provided a preparatory basis for decision-making of asymmetric deformation in Haulage Tunnel（level -785 m underground） at Kongzhuang Coal Mine. The result of in-situ test shows that the design can ultimately guarantee the stability of deep coal gateway, and the success supporting effect can be obtained.

关 键 词：数值模拟 深部工程 软岩 非对称变形 

分 类 号：O242[理学—计算数学]