Vol. 45 No. 4 Aug,2018
矿业安全与环保
MINING SAFETY & ENVIRONMENTAL PROTECTION
周俊.增氏煤矿瓦斯抽采钻孔封孔质量检验方法应用研究[J].矿业安全与环保，2018,45(4)：66-69.
文章编号：10084495(2018)04006604 应用技术
第45卷第4期 2018年8月
端氏煤矿瓦斯抽采钻孔封孔质量检验方法应用研究
周俊"2
（1.瓦斯灾害监控与应急术国家重点实验室，重庆400037；2.中煤科工集团重庆研究院有限公司，重庆400039）摘要：根据管流流体力学理论和漏气检测原理，提出了瓦斯抽采钻孔封孔质量检验判断方法，印通
过在正常抽采状态下检测抽采钻孔内不同深度位置的抽采负压和瓦斯浓度，分析瓦斯抽采浓度沿孔深分布的变化规律，实现快速准确判断抽采钻孔密封质量和漏气位置。以端氏煤矿为例，采用钻孔封孔质量检验判断方法，开展了拍采钻孔的密封质量和合理封孔深度的现场试验，结果表明在钻孔深度9 ~15m内瓦斯浓度变化幅度较大，存在漏气情况，抽采钻孔的密封质量较差、封孔深度不足。该方法实现了对瓦斯抽采钻孔封孔质量的有效检测，为端氏煤矿调整封孔工艺参数和改进封孔方式提供了科学依据。
关键词：瓦斯抽采；钻孔；封孔质量；封孔深度；检验方法
中图分类号：TD712
文献标志码：B
The Application Research on the Quality Inspection Method of Sealing and
Drilling of Gas Drainagein Duanshi Coal Mine
ZHOU Jun'-2
( 1. Stale Key Laboralory of the Gas Disaster Delecting, Prerenting and Emergency Gontrolling, Chongqing 400037, China;
2. CCTEG Chongqing Research Institate, Chongqing 400039, China)
Abstract: According to the theory of fluid mechanics of pipe flow and the principle of gas leakage detection, a quality inspection and judgment method for sealing hole in gas drainage was proposed. That was, by detecting the negative presure and gas concentration at diferent depths of the drainage hole in the normal pumping and mining state, the variation of gas drainage concentration with the depth of hole was analyzed. It can quickly and aceurately determine the seal quality and air leakage position of the extraction hole. Taking Duanshi Coal Mine as an example, the field test of sealing quality and reasonable sealing depth of drilling holes was carried out by using the quality inspection and judgment method of drilling and sealing. The results showed that when the range of drilling depth is from 9 m to 15 m, the gas concentration varies greatly and exists gas leakage, the sealing quality of the drainage hole is poor and the sealing depth of the hole is insufficient. This method can effectively detect the quality of drilling and sealing of gas drainage. It provides a scientific basis for the adjustment of sealing parameters and the improvement of sealing method in Duanshi Coal Mine.
Keywords : gas drainage;drilling; sealing quality ;depth of hole sealing; inspection method
瓦斯抽采是煤矿瓦斯防治与利用的根本措施和收稿日期：201801-08；201807-12修订
基金项目：企业自立创新引导项目（2017YBXM34， 2017YBXM32）；企业科技创新创业资金专项（2018QN005）
作者简介：周俊（1971一），男，四川安岳人，硕士，高级工程师，主要从事煤矿安全技术、民爆技术与工程方面的管理工作。Email;cqzhjun@163,com。
· 66 · 万方数据
主要途径之一，具有安全、环保和节能等多重意义1]。煤矿井下钻孔瓦斯抽采浓度不理想，据不完全统计约有65%的回采工作面抽采钻孔的瓦斯浓度低于30%[2]。从瓦斯抽采环节分析，瓦斯抽采浓度不高主要与钻孔条件、封孔质量、联管接抽及管路维护情况等有关13，其中封孔质量是影响钻孔瓦斯抽采效果的关键因素，普遍存在钻孔密封质量较差和封孔