史红邈

(潞安集团余吾煤业有限责任公司,山西省长治市,046102)



高瓦斯矿井瓦排巷墩柱式支护技术研究

史红邈

(潞安集团余吾煤业有限责任公司,山西省长治市,046102)

摘 要高瓦斯矿井综采工作面的瓦排巷二次支护采用木垛支护,存在承载力低、巷道变形严重、通风效果差等一系列问题,针对这些问题提出采用聚苯乙烯泡沫(EPS)混凝土墩柱式巷道支护技术,并在余吾煤业N2202工作面的外错瓦排巷进行了工业现场试验。结果表明采用墩柱式支护的巷道顶底板移近量较小,巷道围岩变形小,支护效果明显强于木垛支护;墩柱式支护具有重量轻、承载力大、抗压强度大的特性,且其耐久性和耐燃性都强于木垛支护。介绍了墩柱的结构、材料、抗压性能及应用效果。

关键词高瓦斯矿井 巷道支护 瓦排巷二次支护 墩柱式 轻质混凝土

Research on pier column supporting technology for gas discharge laneway of high gas mine

Shi Hongmiao
(Yuwu Mining Industry Co.,Ltd.,Lu＇an Group,Changzhi,Shanxi 046102,China)

Abstract Currently,wood cribs were used for the secondary support of gas discharge laneway in fully mechanized working face of high gas mine,but their bearing capacity was low,the roadway deformation was serious and the ventilation effect was bad.Aiming at these problems,the roadway supporting technology of concrete pier with expandable polystyrene foam was put forward,and the industrial field test was carried out in outward located gas discharge laneway of N2202 working face of Yuwu Coal Mine.The results showed that the displacement between roof and floor in pier column supporting roadway was less,the surrounding rock deformation was little,and the supporting effect was obviously better than wood crib supporting.The pier column supporting method had light weight,large bearing capacity and big compressive strength,and its durability and flame resistance were stronger than wood crib supporting.Besides,the structure,compressive property and application effects of pier column were introduced.

Key words high gas mine,roadway supporting,secondary support of gas discharge laneway,pier column type,lightweight concrete

在高瓦斯矿井中,工作面常用的U形通风方式不仅使采空区上隅角容易积聚大量瓦斯,而且采空区内的瓦斯极易通过上隅角漏到回风巷中,使回风巷中瓦斯浓度升高甚至超标,威胁矿井生产安全,工作面产量也会因此受到影响.在回风巷外侧掘进一条瓦斯排放巷(以下简称“瓦排巷”)是治理工作面采空区上隅角积聚瓦斯的重要措施之一,瓦排巷还可以为开采邻近工作面时服务,因此瓦排巷应具有强度高、通风好、变形小、低成本等特点.余吾煤业N2202工作面瓦排巷一次支护往往达不到支护效果,常采用木垛支护进行二……