以煤层主巷代替岩石主巷及护巷宽煤柱宽度计算的研究

STUDY OF SUBSTITUTING MAIN ROADWAY IN COAL FOR MAIN ROADWAY IN ROCK AND CALCULATION OF WIDTH OF STUB PILLAR

本文根据国内50个矿井的矿压观测数据和国内外一些矿井的开采实践,论述了在合适的条件下,以宽煤柱保护的煤层主巷可以代替底板岩石主巷,从而达到减少基建投资、加快建井速度、改善矿井投资效果和经济效益的目的。同时提出了在中等稳定和松软底板条件下,不同矿压显现强度时,护巷宽煤柱宽度的计算式。

In the light of data from ground pressure observations made in 50 mines in China and mining practice of some mines at home and abroad,the paper describes that under suitable conditions we can substitute main roadway in coal protected by wide stub pillars for main roadways in floor rock with an aim to reduce capital investment,quicken constructional speed and improve returns of investment and economic profit of mine.At the same time,the formula for calculating the width of stub pillars is proposed for moderately stable and soft floor in the condition of different ground pressure intensities.