工作面跨煤层上山开采的应用技术

开滦钱家营矿业公司1197E工作面在回采过程中,需要通过两条煤层上山。在跨煤层上山开采中,通过研究与实践,摸索出了跨煤层上山开采的一整套方法,为以后的生产积累了宝贵经验。

旗山煤矿开采下石盒子组4煤的可行性

旗山煤矿主采的下石盒子组煤之下普遍发育有一层较稳定的极薄煤层煤该:1、34,煤煤质好通过分析矿井下石盒子组煤赋存条件及相邻地方小煤矿湖里煤矿的开采实际。4,认为旗山煤矿开采该层煤在经济上和技术上都是可行的。

恒兴煤矿采煤方法优化及其应用

为了提高恒兴煤矿安全生产水平和经济效益,通过对现有采煤方法存在问题的分析,提出了跨煤层联合开采改造方案,实践应用表明,优化后的采煤方法有效可行,不仅使生产效率逐步提高,而且改善了工作面的安全生产条件。

浅谈煤矿井下受限空间快速更换长距离输送带带面方法

带式输送机对高产高效矿井来说是最理想的连续运输设备,具有输送距离长、运量大、连续性好等优点。输送带寿命到期需要更换时,井下空间够的情况下有很多方法进行快速更换。但在某些特殊条件下带式输送机沿线不具备建立更换带面系统的条件,无法实现同一水平快速更换带面。本文从带面硫化方式、构建更换带面系统、带面更换工艺等方面介绍了一种利用井下漏煤眼突破空间限制跨煤层更换输送带带面的方法。

开采潘家庵矿区下石盒子组4煤的初步探讨

介绍了铜山县湖里煤矿开采薄煤层的方法与效果,证明潘家庵矿区下石盒子组4煤有一定的开采利用价值。

Investigation into the deformation of a large span roadway in soft seams and its support technology

We investigated the deformation failure mechanism of surrounding rock from the aspect of engineering support for a roadway in seams with soft roofs and soft floors and observed the large displacement of the roadway in these soft seams.The result shows that the deformation area is quite large,and settlement of the roof is evident and displacement of the side walls is also obvious.We considered rock bolt-cable coupling for roadway support in seams with soft roofs and floors,in which the cable should be fixed at key positions.As well,we designed an optimal scheme to support a roadway in soft seams of the Shizuishan Second Mine in Ningxia,China.Field monitoring results show that bolt-cable coupling support has achieved the aims of roadway stability control and minimizes deformation.