深部大采高超长工作面煤壁片帮机理及控制技术

发布时间：2019-03-30 20:45

【摘要】：采用实验室试验、数值计算和理论分析综合研究方法,研究了深部大采高超长工作面煤壁片帮机理及控制技术,研究表明:试验工作面煤为脆性煤体,原始含水率为1.6%,煤层含水率达到5.0%左右强度最高;采高一定时,煤层强度越低,煤壁水平变形越大,越容易发生片帮;煤壁位移最大处为煤壁中上部,采高5m时,距煤层底板2~4m容易发生片帮。现场采用两巷超前深孔煤层注水、两巷超前深孔+工作面煤壁浅孔超前预注浆、调节支架安全阀差异开启、选择大工阻支架等关键技术,防片帮、防尘效果较好。研究成果为深部大采高超长工作面安全高效开采提供理论指导和技术支撑。
[Abstract]:Based on the comprehensive research methods of laboratory test, numerical calculation and theoretical analysis, the mechanism and control technology of coal slate in deep large mining height and super long working face are studied. The results show that the coal in test face is brittle coal mass, the original moisture content is 1.6%, and the original water content is 1.6%. The strength of coal seam water cut is the highest when the water content of coal seam is about 5.0%; When the mining height is constant, the lower the strength of the coal seam, the greater the horizontal deformation of the coal wall is, and the more likely to occur the slope, and the maximum displacement of the coal wall is at the middle and upper parts of the coal wall, and when the mining height is 5 m, it is likely to occur at the distance of 2 m m from the coal floor. The key technologies, such as two-lane leading deep-hole coal seam water injection, two-lane advance deep-hole coal face coal wall advance pre-grouting, adjusting the differential opening of the support safety valve, selecting the large work resistance bracket and other key technologies, are used to prevent the dust, and the dust-proof effect is better. The research results provide theoretical guidance and technical support for safe and high efficiency mining in deep large mining height and super long face.
【作者单位】：淮南矿业(集团)有限责任公司;安徽理工大学深部煤矿采动响应与灾害防控安徽省重点实验室;
【基金】：国家自然科学基金资助项目(51504005) 深部煤矿采动响应与灾害防控安徽省重点实验室开放基金(KLDCMERDPC13103) 安徽理工大学博士基金;安徽理工大学青年教师科学研究基金重点项目(12859)
【分类号】：TD355

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