千米定向钻机在有效抽采半径测定中的研究与应用

Research and Application of Kilometer Directional Drilling Machine in Effective Extraction Radius Measurement

为了准确测定千米定向钻机的有效抽采半径,提出基于钻孔瓦斯流量计算所需的千米抽采钻孔总长,将千米钻孔平均分布在钻孔控制区域,从而确定有效抽采半径的测定方法。以山西晋城A矿千米定向抽采钻孔抽采范围内达标可解吸瓦斯含量小于4 m^3/t为指标,在该矿西井区W2303工作面施工千米瓦斯抽采钻孔,结合测定钻场的钻孔浓度、流量等数据,最终确定了该矿的有效抽采半径。

In order to accurately determine the effective extraction radius of the kilometer directional drilling machine,the total length of the kilometer extraction borehole was proposed based on the calculation of the gas flow of the borehole,and the kilo-meter borehole was evenly distributed in the borehole control area,so as to determine the measurement method of the effective extraction radius.Based on the target that the gas content within the drainage range of kilometer directional drilling hole in Jincheng A Coal Mine of Shanxi was less than 4 m^3/t,the effective drainage radius of the mine was finally determined by constructing kilometer gas drainage drilling hole in W2303 working face in the west well area of the mine,combined with the data such as the concentration and flow of the drilling hole measured.