摘要
针对在近距离煤层群条件下穿煤层测定瓦斯压力出现的技术难题,提出了向孔内下长套管结合高压注浆技术处理钻孔,再用胶囊黏液封孔器封堵测压钻孔的工艺方法;介绍了测压钻孔施工的具体工艺流程和封孔操作步骤。利用该方法在平煤天安十矿进行了戊10煤层瓦斯压力测定,经过6 d的观察,压力稳定在2.6 MPa,快速、准确地测得了戊10煤层的瓦斯压力。现场的应用情况表明,这种工艺方法能够有效封堵穿煤层测压钻孔封孔段的裂隙和含水岩层的水系,防止钻孔煤孔段坍塌,隔绝邻近层与测压层的瓦斯沟通。
According to the technical problems of the borehole gas pressure measurement through the seams under the conditions of the close distance seam group,the long casing pipe with the pressurized grouting technology could be applied to make the borehole drilling and the capsule sticky liquid plug could be applied to seal and measure the borehole pressure.The paper introduced the certain technique process of the pressure measurement borehole construction and the borehole sealing operation steps.When the method applied to measure the gas pressure in E10 seam in Tianan No.10 Mine of Pingdingshan Coal Mining Group,after six days observations,the pressure was stabilized at 2.6 MPa and the gas pressure of the E10 seam was rapidly and accurately measured.The site application conditions showed that the technique method could effectively seal the cracks at the borehole sealing section of the pressure measured borehole through the seams and seal the water system of the aquifer,could prevent the seam section falling of the borehole and isolate the gas connection between the neighbour seams and the pressure measured seam.
出处
《煤炭科学技术》
CAS
北大核心
2011年第2期51-54,共4页
Coal Science and Technology
关键词
煤层群
瓦斯压力
胶囊黏液封孔器
高压注浆
孔口管
耐压试验
seam group
gas pressure
capsule sticky liquid plug
high pressurized grouting
borehole tube
pressure resistance test
