低瓦斯煤层工作面高位瓦斯钻孔抽采技术应用实践

发布时间：2018-10-30 11:46

【摘要】：上隅角瓦斯超限或瓦斯异常涌出多发生于高瓦斯煤层工作面,屯宝煤矿M5煤层相对瓦斯涌出量只有2.93m~3/t,但受邻近层开采及采空区遗煤影响,工作面在回采过程中多次发生上隅角瓦斯超限事故,给生产带来严重影响。为彻底解决工作面瓦斯灾害隐患,结合矿井生产实际,对1153综放工作面煤层瓦斯抽采难易程度进行了评价,明确了对工作面采空区进行瓦斯抽采的必要性和可行性,提出了高位钻孔法与采空区埋管法两种采空区瓦斯抽采方法。通过技术和经济比较,确定对采空区瓦斯实施高位钻孔抽采技术方案。经过现场实践,抽采管路内瓦斯浓度稳定,上隅角未再发生瓦斯超限事故,说明该地质条件下抽采钻孔参数科学、合理,利用高位钻孔抽采采空区瓦斯是治理矿井瓦斯的有效技术措施。
[Abstract]:The gas excess or abnormal gas emission in the upper corner often occurs in the working face of high gas seam. The relative gas emission of coal seam M5 in Tunbao Coal Mine is only 2.93 m ~ (3 / t), but it is affected by the mining of adjacent strata and the remaining coal in goaf. In the process of mining, the gas in the upper corner of the coal face has been overrun many times, which has brought serious influence to the production. In order to thoroughly solve the hidden danger of gas disaster in coal face, combined with the actual production of coal mine, the paper evaluates the difficulty and ease of gas drainage in coal seam of 1153 fully mechanized caving face, and clarifies the necessity and feasibility of gas drainage in goaf of working face. Two methods of gas extraction in goaf are put forward in this paper, which are high hole drilling method and goaf buried pipe method. Through the comparison of technology and economy, the technical scheme of high level borehole drainage of gas in goaf is determined. Through the practice on the spot, the gas concentration in the drainage pipeline is stable, and no gas over-limit accident has occurred in the upper corner, which indicates that the borehole parameters of the drainage are scientific and reasonable under the geological conditions. It is an effective technical measure to extract gas from goaf by high drilling hole.
【作者单位】：神华新疆能源有限责任公司生产技术部;山东科技大学资源与土木工程系;
【基金】：国家自然科学基金项目“坚硬砂岩顶板失稳摩擦效应与采空区瓦斯爆燃机理”资助(编号:51504145);国家自然科学基金项目“断层影响区采动作用效应及其致灾规律研究”资助(编号:51574155) 山东科技大学人才引进基金项目“锚固节理岩体局部化变形及分岔机理”资助(编号:2014RCJJ035)
【分类号】：TD712.6

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