沿空掘巷煤柱尺寸优化及支护技术研究

Study on the optimization of coal pillar size and supporting technology in GOB driving along Goaf

为确定沿空掘巷时合理的煤柱尺寸,保证沿空巷道围岩稳定,以101工作面为工程背景,通过工作面侧向支承压力实测可知,在距离采空区9m范围内为侧向支承压力降低区,数值计算结果表明,煤柱尺寸可进一步优化到6~8m,最终成功将7m小煤柱应用于工业性试验,实现了沿空巷道的维护及工作面安全高效回采。

In order to determine the reasonable size of coal pillar in driving along the Goaf,in order to ensure the stability of surrounding rock in gob-side roadway,with 101 working face as engineering background,it is known that the lateral support pressure is reduced in the range of9m from Goaf,the numerical results show that the dimension of coal pillar can be further optimized to 6~8m,Finally,the 7m small coal pillar is applied to the industrial test,which realizes the maintenance of the roadway along the Goaf and the safe and efficient mining.