井下定向钻孔技术在红柳煤矿顶板水害防治中的应用研究

发布时间：2018-07-09 19:26

本文选题：煤矿井下 + 顶板水害防治　；参考：《西安科技大学》2017年硕士论文

【摘要】：水害事故严重程度仅次于瓦斯灾害,是影响矿井安全高效生产的重要灾害类型之一。神华宁煤集团位于我国西北侏罗系裂隙水害代表区域,尤其是鸳鸯湖、马家滩等矿区的部分新建矿井受顶板水害威胁严重。红柳煤矿是鸳鸯湖矿区顶板水害的代表,受直罗组砂岩含水层危害,防治水需求紧迫。目前红柳煤矿主要采用井下物探技术和大角度上仰常规钻孔进行顶板含水体探查和疏放,存在探查准确度低、钻探治理工程量大、疏水时间短效果差,无法超前区域治理等不足,不能满足矿井高效开采需要。本文从红柳煤矿顶板水害防治需要出发,通过分析矿井地质与水文地质特征,研究利用井下定向钻孔进行顶板水探放的技术方法,通过定向钻孔设计技术、成孔工艺技术和配套钻进装备研制选型,总结出一套适用于红柳煤矿顶板水害防治的井下定向钻孔钻进技术与装备,选择3121工作面进行了技术应用实践,顶板水探放效果显著。主要研究工作及成果如下:(1)针对顶板水探放定向钻孔施工特点,完成了定向钻孔设计技术研究,从钻孔结构、平面和空间布置方案及轨迹设计三个方面对顶板水探放定向钻孔进行了合理设计。(2)本文完成了顶板水探放定向钻孔成孔工艺研究,综合采用大直径螺旋钻杆回转钻进和螺杆马达随钻测量定向钻进等两种技术方法,完成了顶板水探放定向钻孔高效高成功率施工,对使用到的各种钻进技术的原理、钻具选配和技术关键点进行了分析,保证了大直径套管下放、岩层大位移定向钻孔和高精度探查孔快速成孔。(3)结合顶板水探放定向钻孔施工需要,完成了配套钻进装备的研制选型,形成了完善的钻进装备体系。(4)在红柳煤矿进行了技术应用,验证了本文研究成果能够满足该矿顶板水害防治的需要。施工完成的顶板水探放定向钻孔既可保证在目的层长距离延伸,又满足工作面全面积覆盖无盲区,且能够加大与顶板含水层、导水裂隙和地质构造带的钻遇率,实钻最大单孔疏放水量达到216 m3/h,起到良好的顶板水探放效果。(5)通过对定向钻孔的探放水量、水质和水温分析,及与常规钻孔对比及相邻工作面施工情况对比,证明采用井下定向钻孔进行顶板水探放的效果明显,优点突出,具有全面推广价值。
[Abstract]:The severity of water hazard accident is second only to gas disaster, which is one of the important disaster types affecting mine safety and high efficiency production. Shenhua Ning Coal Group is located in the representative area of Jurassic fissure water disaster in northwest China, especially in the mining areas of Yuanyuan Lake and Majiatan, which are seriously threatened by roof water hazards. Hongliu coal mine is the representative of roof water hazard in Yuan-Zhouhu mining area, which is endangered by the sandstone aquifer of Zhiluo formation, so the demand for water prevention and control is urgent. At present, Hongliu coal mine mainly uses downhole geophysical exploration technology and large angle upturned conventional drilling hole to explore and release roof water body, which has low exploration accuracy, large amount of drilling engineering and short hydrophobic time. Unable to lead the area control and other deficiencies, can not meet the needs of high-efficiency mining mine. Based on the needs of roof water hazard prevention in Hongliu Coal Mine, this paper, through analyzing the geological and hydrogeological characteristics of mine, studies the technical method of roof water exploration and release by using directional boreholes, and the design technology of directional drilling. This paper summarizes a set of downhole directional drilling technology and equipment suitable for the prevention and control of roof water hazard in Hongliu Coal Mine. The technical application of 3121 working face has been carried out, and the effect of roof water exploration and release has been remarkable. The main research work and results are as follows: (1) according to the construction characteristics of the directional drilling, the design technology of the directional drilling has been studied, and the structure of the borehole has been studied. Three aspects of plane and space layout scheme and trajectory design have been carried out on the reasonable design of the roof water drilling hole. (2) this paper has completed the research on the hole forming technology of the roof water exploration and drainage directional drilling hole. By adopting two kinds of technical methods, such as rotary drilling with large diameter spiral drill pipe and directional drilling with screw motor while drilling, the high efficiency and high success rate of roof water drilling and directional drilling are completed. The principles of various drilling techniques used are discussed. The selection of drilling tools and the key points of technology are analyzed to ensure the rapid formation of large diameter casing, long displacement directional drilling and high precision drilling. (3) combined with the requirement of roof water exploration and directional drilling, Completed the matching drilling equipment development and selection, formed a complete drilling equipment system. (4) in Hongliu coal mine technology application, verify that the research results can meet the mine roof water hazard prevention needs. The completion of the construction can not only guarantee the long distance extension of the target layer, but also satisfy the full coverage of the face without blind area, and can increase the rate of drilling with the roof aquifer, the water-conducting fissure and the geological structure zone. The maximum thinning capacity of single hole in real drilling reaches 216 m3 / h, which plays a good role in roof water exploration and discharge. (5) through the analysis of water quantity, water quality and water temperature of directional drilling hole, as well as the comparison with conventional drilling hole and the construction situation of adjacent working face, It is proved that the downhole directional borehole is effective in roof water exploration and discharge with outstanding advantages and is worth popularizing in an all-round way.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD745.22

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