Safe strategy for coal and gas outburst prevention in deep-and-thick coal seams using a soft rock protective layer mining
Safe strategy for coal and gas outburst prevention in deep-and-thick coal seams using a soft rock protective layer mining
复制标题
深部厚煤层软岩保护层开采防治煤与瓦斯突出安全策略
DOI：
10.1016/j.ssci.2020.104800
复制
发表时间：
2020-09-01
期刊：
影响因子：
6.1
通讯作者：
Wen, Zhi-jie
中科院分区：
文献类型：
--
作者：
Wang, Liang;Lu, Zhuang;Wen, Zhi-jie
煤与瓦斯突出是煤矿生产中危害最大的灾害之一。随着开采深度的增加，深厚煤层组中的所有煤层都将升级为突出煤层，导致无法选择合适的第一采煤层作为保护层。在这种情况下，煤与瓦斯突出灾害更加严重，突出防治难度加大。为了减轻瓦斯灾害，消除瓦斯突出风险，本文提出了一种安全策略。在该策略中，经过安全、经济和技术可行性论证，选择淮北煤田芦岭煤矿深部厚煤层附近合适的软岩层作为第一保护开采层。同时，建立了立体瓦斯抽采利用系统安全工程。对软岩保护层在采矿工艺实践中的作用进行了研究和验证。实践表明，该安全策略可有效降低强突出深厚煤层的突出危险性，并可抽取和利用大量卸压瓦斯。为中国深厚煤层煤、气资源的高效开采提供了新的安全思路。
Coal and gas outburst is one of the most harmful disasters in coal mine production. With the increase of mining depth, all the coal seams in the deep-and-thick coal seam group will be upgraded to outburst coal seams, resulting in no suitable first mining layer can be selected as the protective layer. In this case, coal and gas outburst disasters are more serious and outburst prevention and control is more difficult. In order to alleviate the gas disaster and eliminate the risk of gas outburst, a safe strategy was proposed in this study. In this strategy, a suitable soft rock layer adjacent to deep-and-thick coal seams in the Luling coal mine of Huaibei coalfield was selected as the first protective mining layer after safety, economic and technical feasibility argument. Meanwhile, the stereoscopic gas extraction and utilization system safety engineering was established. The effect in the mining process practice of the soft rock protective layer was investigated and verified. Practice shows that this safe strategy can effectively reduce the outburst risk of strong outburst deep-and-thick coal seams and a large amount of pressure relief gas can be extracted and utilized. It can provide a new safety idea for efficient exploitation of coal and gas resources in deep-and-thick coal seams in China.