基于机械造穴的钻孔瓦斯强化抽采技术研究
发布时间：2018-08-29 08:10
【摘要】：为了提高高瓦斯低透气性煤层瓦斯抽采效果,在借鉴煤层气洞穴完井工艺的基础上,提出了基于机械造穴方法的钻孔强化瓦斯抽采技术,利用四连杆机构原理研制成功了一套针对井下抽采钻孔的专用机械造穴设备。以芦岭煤矿Ⅲ1013工作面为例,利用该设备施工了4组造穴钻孔,并对瓦斯抽采参数进行了连续监测和统计分析。试验结果表明:利用机械造穴设备可在抽采钻孔内形成直径600 mm的洞穴,机械造穴技术能够明显提高钻孔瓦斯抽采效果,与同一地点的普通瓦斯抽采钻孔相比,造穴试验孔单孔瓦斯抽采浓度提高了2.73~3.39倍,纯瓦斯流量提高了2.63~5.11倍。
[Abstract]:In order to improve the effect of gas extraction in high gas and low permeability coal seam, based on the study of coalbed methane cave completion technology, a new method of borehole enhanced gas extraction based on mechanical cavitation is proposed. Based on the principle of four-bar mechanism, a set of special mechanical hole-making equipment for downhole extraction and drilling has been developed successfully. Taking 鈪，
本文编号：2210699
[Abstract]:In order to improve the effect of gas extraction in high gas and low permeability coal seam, based on the study of coalbed methane cave completion technology, a new method of borehole enhanced gas extraction based on mechanical cavitation is proposed. Based on the principle of four-bar mechanism, a set of special mechanical hole-making equipment for downhole extraction and drilling has been developed successfully. Taking 鈪，
本文编号：2210699
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