强风化带回采巷道临界宽度研究

• 作 者: 吴秀仪 刘长武 张有朝 沈荣喜
• 机 构: 四川大学水利水电学院,四川大学水利水电学院,河北金牛能源股份有限公司东庞矿,四川大学水利水电学院 四川成都610065,四川成都610065,河北邢台054021,四川成都610065
• 出 处: 湖南科技大学学报(自然科学版)
• 发表日期: 2007年04期
• 关键词: 强风化带 回采巷道 极限平衡理论 临界宽度

处于强风化带的回采巷道具有围岩风化裂隙增多、强度减弱、矿压显现强烈等特征,如果仍采用普通围岩的巷道设计宽度进行掘进,容易形成巷道局部冒顶、围岩变形大、支护困难等工程问题.为了有效控制和维护巷道围岩,对影响巷道临界宽度的主要因素进行详细分析,认为自然地质因素、掘进与回采技术、支护因素是影响巷道临界宽度的主要因素;应用极限平衡理论、弹塑性理论,结合目前煤矿锚杆支护技术确定强风化带回采巷道的临界宽度;并以东庞矿为工程实例来合理确定强风化带回采巷道的临界宽度.图1,表2,参9.

In the strong weathered belt mining roadway with the surrounding rock weathering fissures increase, the intensity weakened, the pressure is strong and so on. If we use the design width of common surrounding rock to carry out tunneling, it is easy to form local roof fall, large deformation of surrounding rock, Difficulty and other engineering problems.In order to effectively control and maintain the surrounding rock of the roadway, the main factors influencing the critical width of the roadway are analyzed in detail, and the main factors affecting the critical width of the roadway are the natural geological factors, the driving and recovery technologies and the support factors. Balance theory and elasto-plastic theory, the critical width of mining roadway in strong weathering zone is determined by the current coal mine bolting technology, and the critical width of mining roadway in a strong weathered zone is reasonably determined by East Pang Mine as an example. Figure 1, Table 2, reference 9.