切顶卸压沿空留巷技术在高瓦斯煤层群中部煤层的应用

发布时间：2018-03-29 13:34

本文选题：无煤柱开采　切入点：高瓦斯煤层群　出处：《煤炭工程》2016年03期

【摘要】：针对白皎煤矿高瓦斯煤层群中部煤层的工程地质条件,提出并实践了切顶卸压沿空留巷无煤柱开采的技术,研究了留巷加固支护、切顶自动成巷和采空区防灭火工艺。研究表明:采用切顶卸压技术,将采空区原整体的顶板提前采用爆破切顶的方法使采空区垮冒区域与沿空留巷区顶板的压力实现应力分区,当不需要留巷部分采空区顶板在周期来压作用下自然垮落后,形成新巷帮,成功保留2443机巷,从根本上解决了在高瓦斯煤层群开采过程中留设煤柱带来的应力集中、瓦斯突出、煤柱发火等技术难题。
[Abstract]:In view of the engineering geological conditions of coal seam in the middle of high gas coal seam group in Baijiao Coal Mine, the technology of cutting top and releasing pressure and leaving coal pillar in the roadway along goaf is put forward and put into practice, and the reinforcement and support of retaining roadway are studied. The technology of automatic roof cutting and fire extinguishing in goaf and goaf. The research shows that by using the technology of cutting top and releasing pressure, the whole roof of goaf can be cut by blasting ahead of time, so that the pressure of roof in caving area and roadway along goaf can be divided into stress zones. When the roof of some goaf does not need to be left in the roadway, under the action of periodic pressure, the roof naturally collapses and backwardness, forms the new roadway side, successfully reserves 2443 machine roadway, fundamentally solves the stress concentration and gas outburst caused by the coal pillar in the mining process of high gas coal seam group. Coal pillar combustion and other technical problems.
【作者单位】：川煤芙蓉集团白皎煤矿责任公司技术部;深部岩土力学与地下工程国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2006CB202200)
【分类号】：TD823.82

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