摘要
煤层顶板坚硬不易垮冒,导致工作面开采时面临较为严重的冲击地压灾害。为防治冲击地压灾害,矿井采用超前深孔断顶爆破方法进行治理,爆破后产生的CO、NO、NO_(2)等有毒气体干扰了煤炭自然发火预测预报的准确度。为研究宽沟煤矿工作面超前深孔断顶爆破后有害气体产生规律,首先,对矿用乳化炸药成分、爆炸产生有害气体含量进行测定,掌握乳化炸药有害气体产生机理;然后,通过现场测定爆破前后工作面回风流不同区域CO气体浓度,探明了爆破后有害气体在工作面分布情况及影响时长。研究结果表明,工艺巷与煤层预裂爆破后,回风流内的CO浓度增长最高,影响CO浓度平均影响时长4.07 h。基于矿井瓦斯抽采截流技术,提出了CO气体抽排技术方案。
The roof of coal seam in hard roof mine is not easy to collapse,leading to more serious rock burst disasters during mining of the working face.In order to prevent and control the rock burst disasters,the mine adopts the method of advanced deep hole breaking roof blasting for treatment.The toxic gas produced after blasting,such as CO,NO,NO_(2),interferes with the accuracy of coal spontaneous combustion prediction.In order to study the law of harmful gas generation after advanced deep hole breaking roof blasting in the working face of Kuangou Coal Mine,firstly,the composition of mining emulsion explosive and the content of harmful gas generated by explosion were measured,and the producing mechanism of emulsion explosive harmful gas was mastered.Then through the field measurement of the concentration of CO gas in different areas of the return air flow of the working face before and after blasting,the distribution of harmful gas in the working face after blasting and its influence time were verified.The results showed that the CO concentration in the return air flow increased the highest,after the pre-splitting blasting of the process roadway and coal seam,and the average influence time of the CO concentration was 4.07 h.Based on the mine gas extraction interception technology,the CO gas extraction technology was proposed.
作者
杨伟
陈庆丰
陈梦乔
张立魁
Yang Wei;Chen Qingfeng;Chen Mengqiao;Zhang Likui(Guoneng Xinjiang Kuangou Mining Co.,Ltd.,Changji 831114,China;CCTEG Shenyang Research Institute,Fushun 113122,China)
出处
《能源与环保》
2024年第4期14-19,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
坚硬顶板
矿用乳化炸药
深孔断顶爆破
有害气体
hard roof
mining emulsion explosive
deep hole breaking roof blasting
harmful gas
