综采工作面水力压裂初次放顶技术研究

发布时间：2018-06-23 04:49

本文选题：综采工作面 + 水力压裂　；参考：《煤炭科学技术》2017年07期

【摘要】：针对柠条塔煤综采工作面顶板稳定难以垮落,工作面大面积悬顶带来的安全隐患问题,在综采工作面开切眼实施水力压裂初次放顶技术,通过监测水力裂缝扩展、水压变化及顶板垮落效果,分析水力压裂技术在初采期间的控顶效果。结果表明:针对厚而稳定的砂岩顶板,在开切眼处沿工作面推进方向实施水力压裂钻孔,可有效弱化顶板岩层,有利于综采工作面初采期间顶板岩层顺利、安全垮落。根据柠条塔煤矿顶板岩层条件,确定了合理的压裂参数,包括钻孔间距、长度、倾角以及压裂所需压裂,可保证工作面顶板在初采期间分层、分次逐步垮落,未形成强烈冲击,确保了工作面安全初采。
[Abstract]:In view of the problem that roof stability is difficult to collapse in Caragana tower coal fully mechanized mining face and the safety hidden trouble caused by large area roof suspension, hydraulic fracturing initial roof caving technology is applied in fully mechanized mining face to monitor the expansion of hydraulic crack. The change of water pressure and roof collapse effect are analyzed, and the control effect of hydraulic fracturing technology during initial production is analyzed. The results show that hydraulic fracturing can effectively weaken the roof strata and is beneficial to the smooth and safe collapse of the roof strata during the initial mining of fully mechanized coal mining face, aiming at the thick and stable sandstone roof, and the hydraulic fracturing drilling is carried out along the direction of the working face's advance at the opening and cutting hole. According to the roof rock condition of Caragana Tower Coal Mine, reasonable fracturing parameters, including drilling spacing, length, inclination angle and fracturing requirements, can be determined to ensure that the roof of the working face is stratified during the initial mining, gradually collapses step by step, and no strong impact is formed. To ensure the safety of the first mining face.
【作者单位】：煤炭科学研究总院开采研究分院;天地科技股份有限公司开采设计事业部;
【基金】：国家重点研发计划资助项目(2017YFC0603003)
【分类号】：TD327.2

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