留设保护煤柱尺寸的影响因素及变化规律探讨

PROBING INTO INFLUENCE FACTORS AND CHANGING LAWS OF COAL PILLAR FOR PROTECTION BUILDINGS

在分析留设保护煤柱留设尺寸受上覆岩层岩性、煤柱自身强度、采深、采厚以及煤层倾角等地质采矿条件影响因素的基础上,结合一定的地质采矿条件,探讨了保护煤柱尺寸随开采深度、开采厚度及煤层倾角等的变化规律,建立了煤柱尺寸的计算公式。指出,在同一矿区,不同的开采深度、开采厚度及煤层倾角的条件下,留设的保护煤柱的尺寸并不是传统认为简单的线性关系,而是复杂的非线性关系,从而为保护煤柱设计提供理论依据。

Based on investigation into influence factors ot geology and mining, such as stratum nature of mare roof, mining depth, mining thickness, coal pillar strength and so on, combing with specified geology and mining factors, the changing principle of size of coal pillar along with mining depth, mining thickness and coal seam inclination angle etc is probed into, the size of coal pillar calculation formulas are established. In a mine, under different mining depth and thickness, coal seam inclination angles conditions, the size of protection coal pillar is not tradition holding liner relations but complicated un-- liner relations. So theory basis is provided for designing coal pillar.