条带开采中巷道的变形规律

Deformation features of a roadway affected by strip mining

为了揭示条带开采下巷道的特殊变形规律,通过某矿一条条带开采巷道的顶底板及两帮闭合变形的实测结果,结合实验室相似模拟实验的结果,采用最新的岩层移动理论——关键层理论及一般矿压分析理论——顶板回转理论等对现场监测及实验室实验的结果进行了系统分析研究。发现了一些前人未曾揭示的规律,条采巷道闭合变形将出现两个极值,其距离大于普通开采巷道,因此,巷道应在前方峰值压力第二次采动影响时加强支护。这些都可对类似条件下的巷道支护提供重要参考。

To disclose the different deformation features of roadway affected by strip mining, in this paper through the displacement field measurement and the physical simulation of one strip mining roadway, based on the key stratum theory and roof movement theory, its deformation is analyzed and studied. Some deformation features that have not been discovered before are found. There are two peaks of displacement in strip mining roadway, and their lag distance is longer. So, the support of the roadway will be reinforced before the second mining influence come, which can provide valuable reference for the support of the roadways under the similar conditions.